Systems & Components for Infrastructure
DC Switchgears
Power Controls
DC High Speed Circuit Breakers
Contactors
Protection Relays
Transducers
Resistors
Fans
2
Energy
Microelettrica Scientifica’s extensive product ranges
have become the standard of reference for a growing
number of customers worldwide in the challenging
Energy Market. Microelettrica Scientifica’s been
evolving through innovation to support new technology
in generation, renewable energy and smart grid.
Industry
During almost 30 years of operation, a close
relationship with the Customers has been created.
Microelettrica products are present in most
of the industries such as Steel making, Cement,
Glass, Chemical, Oil&Gas and Utilities.
Applications
Products
Applications
Photovoltaic interface relay
Contactors
Disconnectors
Motor and generator protection
Feeder and bus relay
Generator relay
DC High Speed Circuit Breakers
Feeder and bus bar relay
Generator relay
Resistor for harmonic filters
Power Resistor
Resistor for harmonic filters
Neutral grounding resistors
Protection Relays
Neutral grounding resistors
Load banks
Transducers
Load banks
DC contactors for inverters and UPSs
Fans
DC contactors for inverters and UPSs
Photovoltaic string contactors
Photovoltaic string contactors
Ground fault neutralizer system
Ground fault neutralizer system
Systems & Components for I nfrastru ct u r e
3
Railways
Today, Microelettrica Scientifica is a leading supplier of
equipment for dc traction substations. We also offer to
our Customers a complete integration in DC Traction
System handling complex project by means our
engineering and project management experience.
Products
Applications
Traction Power Systems
DC Power Substations
DC Switchgears
and Switching Cubicles
Traction lines
DC High Speed Circuit Breakers
Depot
Feeder manager and DC Relays
for Traction
Underground ventilation
DC Switchgears
Made in Microelettrica Scientifica
Always aiming for the best results,
Microelettrica Scientifica develops and
manufactures the entire range of products
in Buccinasco close to Milan. We also
run operations in U.S.A., South Africa,
China, India, France, Brasil and Turkey
through which our Customers have access
to immediate local assistance and the
possibility of localization of Microelettrica
Scientifica products. Our Customers know
they can always count on quality, excellence
and accuracy of Microelettrica Scientifica
Products and Services.
DC Transducers
Products
Contactors and Disconnectors
Contactors
Disconnectors
Power Resistor for Line Testing
DC High Speed Circuit Breakers
Braking Resistors for Fixed
Installation
Braking Resistors
Resistors for Traction Control
Negative Protection Cubicles
High Voltage Transducers
Fans
Fans
4
A tailored solution for every
Negative overvoltage
protection
Feeder Trolley
Rectifier
UMLES
IR 3000
Diaclad
Disconnector
Feeder
IR 6000
Systems & Components for I nfrastru ct u r e
substation component need
Bar DIN Contactor
Hall effect transducer
V-I Transducer
Braking Resistor
SCADA
Transformer
5
6
A tailored solution for every
SCADA
AC Protection
Relay
Bar DIN Contactor
Rectifier
Neutral Grounding Resistor
Filter Resistor
High Speed Breaker
Interface Protection
Contactor
Bar DIN Contactor
Disconnector
Systems & Components for I nfrastru ct u r e
industry component need
DC Hall Effect
Transducer
Breaker
Interface Protection
Disconnector
Interface Protection
AC Low Frequency
Contactor
Inverter DC Contactor
7
DC Switchgears
8
Feeder Cubicle
Type DIACLAD - Metalclad
Breaker type IR6000 and IR2000 withdrawable
Protections UMLEs feeder manager realy
di/dt – ΔI/Δt – Imax
Line Test Device
PLC integrated device
Communication protocol ETHERNET TCP/IP
MODBUS IEC61850
IEC 101/104
Description
The Feeder cubicle type DIACLAD designed and manufactured according to EN 50123 & IEC
61992 standards is suitable for indoor installation in DC traction substation systems such as
Tramways, Metros and Trolleybuses. The DIACLAD switchgear is capable to withstand internal
arc at 50kA – 300ms.
The cubicle is composed of three separate compartments:
• circuit breaker compartment that houses the withdrawable HSCB type IR6000 equipped
with the power part of Line Test Device (contactor, resistor and fuse)
• low voltage compartment complete of control and protection devices (e.g. UMLEs relay,
earthing relay, metering instruments, PLC and communication to SCADA)
• bus-bar compartment composed of two parts:
• main incoming busbar
• connection bars to connect the outgoing power cables. In this part is inserted the shunt
for current measure and further components such as surge arrester, earthing switch
and by-pass disconnector according to the plant’s philosophy
Electrical Characteristics
Nominal voltage Un [VDC] Rated voltage UNe [VDC] Rated insulation voltage UNm [VDC] Rated impulse withstand voltage UNi [kV] Power frequency withstand voltage Ua [kV] Rated service current INe [kA] Rated current main busbar INe [kA] Rated short circuit current INss/ÎNss [kA]
7501500
9001800
18002300
1518
6,98,3
up to 6
up to 6
up to 9
up to 9
90/12070/100
3000
3600
4800
40
18,5
up to 4
up to 6
50/70
Systems & Components for I nfrastru ct u r e
9
Mechanical Characteristics
Nominal voltage Un [VDC] 750 15003000
Protection degree for the enclosure IP/3XIP/3XIP/3X
for the remaining separations (shutters included) IP/2XIP/2XIP/2X
Dimensions Width [mm]
500 ÷ 600
500 ÷ 600
500 ÷ 600
Depth [mm]
1300 ÷ 1800
1300 ÷ 1800
1800 ÷ 2000
Height [mm] 212521252250
Weight [kg]
~ 600
~ 600
~ 650
Ambient conditions operating temperature range - 5 ÷ 40°C
- 5 ÷ 40°C
- 5 ÷ 40°C
storage temperature range - 20 ÷ 50°C
- 20 ÷ 50°C
- 20 ÷ 50°C
relative humidity <90%<90%<90%
altitude 1200 m a.s.l.
1200 m a.s.l.
1200 m a.s.l.
FRONT
SIDE SECTION
(+)
1
HSCB
2
HS
3
4
TO LINE
(For information only)
DC Switchgears
10
Disconnector
Cubicle
Type DIACLAD - Metalclad
Executions Withdrawable or Fixed
Configurations Single or double poles
Control Motorized or Manual
Protections Reverse current relay “32” Earthing relay “64”
PLC integrated device
Communication protocol ETHERNET TCP/IP
MODBUS IEC61850
IEC60870-5-101/104
Description
The Disconnector cubicle type DIACLAD is mounted between the Rectifier unit
and the Feeder cubicles.
It is suitable for indoor installation in DC traction substation systems such as Tramways,
Metros and Trolleybuses and is designed and manufactured according to EN 50123 & IEC
61992 standards.
The main feature of the incoming cubicle is to allow access to the rectifier for the inspection
and maintenance while the DC section is in operation.
The cubicle is composed of three separate compartments:
• withdrawable or fixed Disconnector Switch compartment
• low voltage compartment complete of control and measuring devices (e.g. reverse current relay “32”, earthing relay “64”, metering instruments, PLC and communication to SCADA)
• bus-bar compartment where are allocated the main incoming busbar, the connection
for outgoing cables and the shunt for current measure.
Electrical Characteristics
Nominal voltage Un [VDC] Rated voltage UNe [VDC] Rated insulation voltage UNm [VDC]
Rated impulse withstand voltage UNi [kV] Power frequency withstand voltage Ua [kV] Rated service current INe [kA] Rated current main busbar INe [kA] Rated voltage auxiliary circuit [VAC/DC]
7501500
9001800
18002300
1518
6,98,3
up to 9
up to 6
up to 12
up to 9
24 ÷ 220
24 ÷ 220
3000
3600
4800
40
18,5
up to 4
up to 6
24 ÷ 220
Systems & Components for I nfrastru ct u r e
11
Mechanical Characteristics
Nominal voltage Un [VDC] 750 15003000
Protection degree for the enclosure IP/3XIP/3XIP/3X
for the remaining separations (shutters included) IP/2XIP/2XIP/2X
Dimensions Width [mm]
800800800
Depth [mm]
1300 ÷ 1800
1300 ÷ 1800
1800 ÷ 2000
Height [mm] 212521252250
Weight [kg]
~ 600
~ 600
~ 650
Ambient conditions operating temperature range - 5 ÷ 40°C
- 5 ÷ 40°C
- 5 ÷ 40°C
storage temperature range - 20 ÷ 50°C
- 20 ÷ 50°C
- 20 ÷ 50°C
relative humidity <90%<90%<90%
altitude 1200 m a.s.l.
1200 m a.s.l.
1200 m a.s.l.
FRONT
SIDE SECTION
INCOMING
POSITIVE
CABLES
1
2
INCOMING
NEGATIVE
CABLES
TYPICAL
LINE DIAGRAM
HS
3
M
(+)
(-)
(For information only)
DC Switchgears
12
Rectifier Cubicle
Type DIACLAD - Metalclad
Configurations
single unit 6-pulses
double unit 12-pulses series or parallel
connected, with or without interphase reactor up to 4 diodes
per arm fuse protection
RC overvoltage protection
Execution
withdrawable (or Fixed)
Protections
reverse current relay “32”
frame protection relay “64”
PLC integrated device
Communication protocol ETHERNET TCP/IP
MODBUS IEC61850
IEC60870-5-101/104
Description
The rectifier cubicle type DIACLAD designed and manufactured according to CEI EN 50328 &
IEC 61992 standards is suitable for indoor installation in DC traction substation systems such
as Tramways, Metros and Trolleybuses. The rectifier is available in a single unit having a simple
Graetz bridge (six pulses) assembled inside a withdrawable trolley or in two units having
two Graetz bridges (twelve pulses), either in parallel or in series connection, assembled inside
two separate withdrawable trolleys. The rectifier bridges are available with a single diode
per arm or up to four diodes in parallel per arm. The rectifier bridges are protected from
the overvoltage spikes by opportunely designed DC side snubber networks. The several cubicle
configurations can meet all Customer needs. The withdrawable execution allows the access to
the rectifier for the inspection and maintenance operation with the bus-bars connected.
The cubicle is composed of three separate compartments:
• withdrawable (or fixed) rectifier compartment
• low voltage compartment where are mounted all the control and measuring devices
(e.g. reverse current relay “32”, earthing relay “64”, metering instruments, PLC
and communication to SCADA)
• bus-bar compartment where are allocated the AC connections to the transformer,
the DC positive and negative busbars, the connection for outgoing cables and the shunt
for current measure.
Electrical Characteristics
Nominal voltage Un [VDC]
Rated voltage UNe [VDC]
Rated insulation voltage UNm [VDC]
Rated impulse withstand voltage UNi [kV]
Power frequency withstand voltage Ua [kV]
Rated power Pd [MW]
Reaction
Configuration (EN50328 – Tab. 4)
Duty class (EN50328 – Tab. 5)
750 900
1800
15
6,9
up to 2,5
6 and 12 -pulses
8 - 9 - 12
V - VI
1500 1800 2300
18 8,3 up to 2,5
6 and 12 -pulses
8 - 9 - 12
V - VI 3000
3600
4800
40
18,5
up to 2,5
12 -pulses
8 - 9 - 12
V - VI
Systems & Components for I nfrastru ct u r e
13
Mechanical Characteristics
Nominal voltage Un [VDC]
750
1500 3000
Protection degree for the enclosure
IP/3X
IP/3X IP/3X
for the remaining separations (shutters included)
IP/2X
IP/2X IP/2X
Dimensions per cubicle Width [mm]
800
800 1200
Depth [mm]
1800
1800 2200
Height [mm]
2125
2125 2300
Weight per cubicle [kg]
~ 800
~ 800
~ 1400
Ambient conditions operating temperature range
- 5 ÷ 40°C
- 5 ÷ 40°C
- 5 ÷ 40°C
storage temperature range
- 20 ÷ 50°C
- 20 ÷ 50°C
- 20 ÷ 50°C
relative humidity
<90%
<90%
<90%
altitude
1200 m a.s.l.
1200 m a.s.l.
1200 m a.s.l.
FRONT
SIDE SECTION
INCOMING
POSITIVE
CABLES
1
2
INCOMING
NEGATIVE
CABLES
TYPICAL
LINE DIAGRAM
HS
3
M
(+)
(-)
(For information only)
DC Switchgears
14
Negative OverVoltage Protection
Device Cubicle
Type DIACLAD – METALCLAD Enclosed
Execution
Fixed or drawout type
Protections
Overvoltages according
with EN 50122-1
Communication protocol ETHERNET TCP/IP
MODBUS protocol
Description
During the operation of DC traction systems the voltage between the rail and the grounding
network may arise at dangerous voltage level for the human body.
The persistence of these voltages must be prevented by means of voltage-limiting device
which is in accordance with the V-time curve of the EN 50122-1.
In fact the NOVPD measures and monitors the voltages (AC or DC) on the rails and in case
of excessively high voltage it temporally short-circuits the negative to grounding network.
The stray currents are minimized due to automatic re-opening of the short circuit device.
The main features of the NOVPD are:
• High safety for personnel and people
• Fast time response according with EN50122-1
• Type tested at full current
• Remotely controlled
• Diagnostics of SCR and contactors
Electrical Characteristics
Nominal voltage Un [VDC] Rated voltage UNe [VDC] Rated insulation voltage UNm [VDC]
Rated impulse withstand voltage UNi [kV] Power frequency withstand voltage Ua [kV] Making Capacity 7501500
9001800
18002300
1518
6,98,3
25/50/100 kA
25/50/100 kA
3000
3600
4800
40
18,5
25/50/100 kA
Systems & Components for I nfrastru ct u r e
15
Mechanical Characteristics
Nominal voltage Un [VDC] 750/1500/3000
750/1500/3000
Protection degree for the enclosure IP/3XIP00
for the remaining separations (shutters included) IP/2XIP00
Dimensions Width [mm]
800520
Depth [mm]
600975
Height [mm] 17501080
Weight per cubicle [kg]
~ 250
~ 200
Ambient conditions operating temperature range - 5 ÷ 40°C
- 5 ÷ 40°C
storage temperature range - 20 ÷ 50°C
- 20 ÷ 50°C
relative humidity <90%<90%
altitude 1200 m a.s.l.
1200 m a.s.l.
FIG. 1
SCR
CONTROL
BOARD
FIG. 2
FRONT
SIDE SECTION
1
3
(+)
(-)
2
M
(+)
(-)
(For information only)
NEGATIVE
CABLES
DIAGNOSTIC
CONTROL
UNIT
NEGATIVE
Power Control
16
SCADA System
Applications
DC Substation
Microelettrica Scientifica solution for the SCADA of the Traction Power Substation suitable
for any railways or mass transit systems. We integrate all our equipment, such as protection
relays on AC supply network, feeder manager protection, relays and PLC or RTUs.
Industry
Main functionality are as follow:
1. leave available the control and supervision of the TPS
2. time clock and synchronism of the automation and diagnostics by means GPS
3. control and supervision by means HMI of all equipment of the system
4. complete management of all RTU of the SCADA
The HW and SW architecture is a scalable solution which permits expansion of the RTU
and the controlled equipment just adding other RTUs.
Systems & Components for I nfrastru ct u r e
17
Central Control Unit – the CCU is the master commander of the whole system. The CCU manages all the data coming from
the RTUs, provides all the logics and safety procedures to the system and interface the Scada of the TPS to the upper automation level.
Remote Control Units – the RCU represents the whole RTUs to be installed on the field. The RTUs are the interface between
the Central Control Unit and the equipment such: feeder cubicles, traction rectifier groups, inverters, auxiliary supply panels,
MV switchgear, HV switchgear and the other power equipment of the TPS. The RTUs permit the data acquisition from the main
equipment in order to employ the logic, diagnostics and provide the command to the breaker and disconnecting switches.
LAN – LAN is the telecommunication network inside of the TPS which leave available the data transmission among the RTUs
and CCU.
The functions of the CCU are:
• Safety logics of the substation (Automatic Reclosing, Locking the equipment for maintenance, Opening routines, Interlocks
among switches and breakers)
• Interface Scada of the TPS with upper automation level
• Management of all SW and HW of the TPS
• By means of a manipulator to be installed on the control desk the CCU manages the following operation:
-Local position – all the operation shall be done by TPS SCADA and all the command from remote control will be disabled
-Remote position – all the operation shall be done remotely. The TPS SCADA will be used for supervision only
-Emergency position – all the operation shall be done on the push bottom on the switchgears
• Chronological Event Recorder data base manager: the CCU manages the event recording into a Data Base on the hard disk
of the PC Servers and leaves available all the file log with chronological time stamp
• Time stamp synchronisation: the Scada of the TPS is equipped with a GPS receiver which realise the time synchronisation
with homologate clock. The GPS signal is used by CCU to synchronize the LAN of TPS and all the RTUs
• Management of the catenary disconnecting switches
• SWITCHOFF Manager: the Scada can be programmed for the automatic exchange of the switchoff command during maintenance operation. The safety protocol of the switchoff of the catenary shall be added to the Scada that’s real enhance safety
•Disturbances
Power Control
18
Automatic Braking
Resistor System
Type DIACLAD – Metal Enclosed
Execution
Fixed type
Application
Electromechanical braking
Control
Power electronics
or contactors
Communication protocol ETHERNET TCP/IP
MODBUS protocol
Description
Automatic Braking Resistor Systems (ABRS) for fixed installation are installed along the track
and can regulate the overvoltage which occurs on the traction line during the trains operation.
Dynamic braking is the method of train braking whereby the kinetic energy of a moving train
is used to generate electric current at the locomotive traction motors.
The electric current generated by the motors in the dynamic-braking mode can be useful for
the other trains running on the same track or it is a waste product and it must be dissipated as
heat in banks of resistors.
The ABRS of Microelettrica Scientifica measures the voltage of the traction line and acts
as throttle leave current flows into the load resistor banks and waste traction energy.
The load resistor banks can be cooled by forced ventilation or natural air ventilation.
The ABRS is based on IGBT technology or traditional contactors to switch ON and OFF load
resistor banks.
Electrical Characteristics
Nominal voltage Un [VDC] Rated voltage UNe [VDC] Rated insulation voltage UNm [VDC] Rated impulse withstand voltage UNi [kV] Power frequency withstand voltage Ua [kV] Rated current [A] Rated power Pd [kW] 750
900
1800
15
6,9
up to 2000/1500
Systems & Components for I nfrastru ct u r e
19
Mechanical Characteristics
Nominal voltage Un [VDC] 900
Protection degree for the enclosure IP22/IP44
Power of load bank [kW]
1500
Dimensions per load bank
Width [mm]
1150
Depth [mm]
1400
Height [mm] 2500
Weight load bank [kg]
550
Cooling
Forced ventilation
Material active parts
Stainless steel AISI 304
RESISTOR
BANKS
F.O.
SWITCH
UNIT
F.O.
DIAGNOSTIC
CONTROL
UNIT
MEASUREMENT
UNIT
POSITIVE
NEGATIVE
(For information only)
DC High Speed Circuit Breakers
20
IR6000F Mechanical
IR6080F
IR6000F line
Applications
DC Substation
Industry
The IR6000 series are single pole, magnetic blow out, trip free, air circuit breakers.
The closing mechanism is an independent motor operated type.
The IR6000 Circuit Breaker is held closed by holding coil or by permanent magnet device
and is equipped with a direct acting over-current trip device which may be either
unidirectional and bidirectional.
The arc chute is made in ceramic material for a longer life and reduced maintenance.
The use of arching contacts ensure a long duration in electrical life.
The breakers can be used in single voltage or dual voltage applications, where multisystem
solution is required (ex 1800/3600V).
Systems & Components for I nfrastru ct u r e
21
482
(19,00)
170
(6,69)
89
(3,50)
IR6040F
545
(21,45)
768
(30,23)
89 161
(3,50) (6,34)
64
(2,52)
150
(5,90)
404
(15,90)
1030
(140,55)
630
(24,08)
184
(7,24)
max 60
(2,36)
The breaker conforms to EN50123; IEEE C37-14; IEEE C37-16
A special version of the IR6000F is with mechanical latching. This ensures an high withstand
capability to the short circuit currents up to 150kA
Type
Umax [V]
IR6000F Mechanical up to 1200 (IEEE)
IR6080F
up to 3600
IR6040F up to 3600
I [A]
8000
8000
4000
W [mm]
340
340
300
H [mm]
1030
1030
1030
L [mm]
650
650
650
307
(12,09)
232
(9,13)
DC High Speed Circuit Breakers
22
IR3000F Vertical
IR3000F line
Applications
DC Substation
Industry
The IR3000F series are single pole, magnetic blow out, trip free, air circuit breakers.
The closing mechanism is an independent motor operated type.
The IR3000 Circuit Breaker is held closed by holding coil or by permanent magnet device
and is equipped with a direct acting over-current trip device which may be either
unidirectional and bidirectional.
The arc chute is made in ceramic material for a longer life and reduced maintenance.
The use of arching contacts ensure a long duration in electrical life.
The breaker conforms to EN50123; IEEE C37-14; IEEE C37-16.
Different solutions of arc chutes help the cubicle designers for the optimization of the space.
Systems & Components for I nfrastru ct u r e
23
IR3000F 900
IR3000F 1800
Type
Umax [V]
I [A]
W [mm]
H [mm]
L [mm]
IR3000F 900
9003000
220395530
IR3000F 1800
18003000220 478 530
IR3000F Vertical up to 1800
3000
220
720
530
Contactors
24
24
D
H
w
LTHS 60
LTHS line
Applications
Line contactor
Power or auxiliary converter input
Filter pre-charging
Traction motors on-load disconnection
Electromagnetic brakes
Heating/Air conditioning systems
Microelettrica Scientifica contactors for railway applications are designed to be used on
electrical equipment in presence of the most severe conditions, such as shocks and vibrations,
which occur on on-board traction vehicles.
The LTHS Line displays a traditional design which enables them to withstand the highest
current ratings in harsh working conditions.
To accomplish most of the possible applications, all the LTHS contactors can be manufactured
in single or multipolar form and, upon request, allow a very high degree of customization.
Versions with normally open or normally closed poles are manufactured, and mechanical
latching can be supplied. In order to work efficiently both with high and low currents, the
contactors are equipped with indirect blow out circuit. This arc-extinguishing technology
allows to work indifferently in AC as well as DC.
The DC control coil operates without economy resistor within a wide working range. A
“varistor” cuts off the peak voltage when the coil is de-energized.
More than 20000 LTHS contactors are delivered every year for the most demanding projects
and applications worldwide.
General Characteristics
•
•
•
•
•
•
The most experienced extra heavy duty line
line.
Designed for on-board applications according to IEC 60077
60077.
Ratings up to 2000 VDC/AC and up to 1600 A/pole application
application.
Direct or indirect arc blow-out systems available according specific application requirements
requirements.
Multi-pole combination up to 44,NO
NOor
orNC
NC,poles
poles.
Very high level of customization available
available.
Auxiliary contact blocks type SL11
• Up to 4 blocks normally mounted on LTHS contactors
• 1 NO + 1 NC or 2 NO block versions available
• Made in self-extinguishing Latamid polyamide that guarantees high electrical and mechanical
• Performances as well as very low temperature resistance
• Double interrupting, self-cleaning, solid silver contacts
• On request special execution with gold plate contacts
Components for on-board appl icat i o n
25
25
LTHS 125
LTHS 320/380
LTHS 400
LTHS 650/800/1250
LTHS 1500/1700
Type
Umax [VAC/DC]
Ith [A]
W [mm]
H [mm]
­LTHS 60
1000 80
143
197
LTHS 125
1000
150185276
­LTHS 320 2000 350 220.5 300.5
LTHS 380
2000 380
220.5 300.5
LTHS 400 2000 500 329 423
LTHS 650/800 2000 700/920 335 438(D1)/441(D2) LTHS 1250 2000 1300 350 473(D1)/476(D2) LTHS 1500 2000 1350 350 533.5(D1)/536.5(D2)
LTHS 1700 2000 1600 350 533.5(D1)/536.5(D2) D1/D2 [mm]
(1/2 poles)
72/93
86/114
86/114
86/114
115.5/202
119/206.5
127.2/206.5
111/215
127/235
Contactors
26
D
­LTC 100
LTC 100 NC
LTCS 250
LTCS 250 2 poles
H
w
LTC line
Applications
Auxiliary converter input
Filter pre-charging
Heating/Air conditioning systems
Line contactor
The LTC Series contactors, thanks to their excellent balance between dimensions,
performances and robustness, are suitable for all those on-board applications which demand
a small, smart device. Their design encourages applications where high operating frequencies
and small available spaces are important requirements.
Like all Microelettrica Scientifica contactors, the LTC Series is based on a standard concept,
but a very high level of customization can be achieved by replacing a few key components.
Normally open and normally closed poles can be fitted, as well as mechanical latching.
The breaking circuit is equipped with permanent magnets or indirect arc blow out coil to
work efficiently both with high and low currents.
The DC control coil operates without economy resistor within a wide working range. A
“varistor” cuts off the peak voltage when the coil is de-energized.
More than 20000 LTC contactors are delivered every year for the most demanding projects
and applications worldwide.
General Characteristics
• The modern and compact heavy duty line, up to 4000VDC/AC application, up to 1000A/pole
• The most compact and modern heavy duty line
• On-board and stationary applications
• Designed for on-board applications according to IEC 60077
• 1-2-3 and 4 pole configuration available, NO and NC poles, permanent magnets
• Ratings up to 4000 VDC/AC and up to 1000 A/pole application
or indirect arc blow outs
• Permanent magnet or indirect arc blowout systems available according specific application
• Flexible control and auxiliary contacts options, customization available
requirements
• Multi-pole combination up to 4 NO or NC poles
• Very high level of customization available
Auxiliary contact blocks type SL11
• Up to 4 blocks normally mounted on LTHS contactors
• 1 NO + 1 NC or 2 NO block versions available
• Made in self-extinguishing Latamid polyamide that guarantees high electrical and mechanical
• Performances as well as very low temperature resistance
• Double interrupting, self-cleaning, solid silver contacts
• On request special execution with gold plate contacts
Components for on-board appl icat i o n
27
LTCS 250 3 poles
LTC 250 NC
LTCH 250
LTCH 60
LTCH 1000
Type
Umax [VAC/DC]
Ith [A]
W [mm]
LTC 100
1000
100 106 LTC 100 2 poles 1000 100/200 120 LTC 100 NC 1000 100 106 LTCS 250/300 2000 250 140 LTCS 250/300 2 poles 2000 250/500 140 LTCS 250/300 3 poles 2000 250 140 LTC 250/300 NC 2000 250 140 LTCH 250 2000 250 154 LTCH 60 4000 60 168 LTCH 60 2 poles
4000 60/120 168
LTCH 1000 2000 1000 385 H [mm]
D [mm]
127.5 127 155 156.5 156.5 156.5 196 176 221 221 300 63
93
60
86
109.2
165.5
78
86
88
125
93
Contactors
28
LTHH 40
w
LTHH 100
H
D
LTHH/LTE/LTP line
Applications
Auxiliary converter input
Filter pre-charging
Capacitor discharging
Heating/Air conditioning systems
Line contactor
Train supply line
Resistors based traction systems, for
starting and braking of electric motors
The Microelettrica Scientifica LTHH/LTE/LTP Lines for electric traction are supplied to railways
and underground systems throughout the world.
Where high voltage ratings are required, the LTHH Series contactors are the right solution.
The creepage and clearance distances are widely dimensioned for safe application in polluted
environments. Their narrow outline is especially conceived for applications where space is a
critical issue - as more and more often happens on railway vehicles.
To meet all possible applications, they are available both with electric (LTHH/LTE) and
pneumatic (LTP) control, and poles can be manufactured in normally open or normally closed
configurations.
The direct or indirect blow out circuit makes the LTHH contactors suitable to work both with
high and low currents.
The DC control coil operates without economy resistor within a wide working range. More
than 10000 LTHH contactors are delivered every year for the most demanding projects and
applications worldwide.
General Characteristics
DC/AC application, up to 1350A/pole
•• The
Thehigher
highestvoltage
voltagesingle
singlepole
poleheavy
heavyduty
duty line,
line up to 4000V
•• On-board
and
stationary
applications
Designed for on-board applications according to IEC 60077
•• Multipole
NO and
indirect
blow out
Ratings upassemblies,
to 4000 VDC/AC
andNC
uppoles,
to 1350
A/polearc
application
•• Flexible
options, high
unit customization
available
Direct orcontrol
indirectand
arcauxiliary
blow-outcontacts
systems available
according
specific application
requirements
• Multi-pole assemblies, NO or NC poles
• Very high level of customization available
Auxiliary Contact Blocks Type SJ11
• Normally mounted on LTHH contactors
• 1 NO + 1 NC or 2 NO block versions available
• Execution in Makrolon, self-extinguishing and transparent polycarbonate
• Double interrupting, self-cleaning, solid silver, snap action contacts
• On request special execution with gold plated contacts
Components for on-board appl icat i o n
29
LTHH 250/400
LTP 2-400/600
LTP 4-400/600
LTP 4-2000
Type
Umax [VAC/DC]
Ith [A]
W [mm]
H [mm]
LTHH 40
2000
60
200(D1)/244(D2)
162.5(D1)/174.5(D2) LTHH 100 4000 120 377(D1)/410(D2)
274(D1)/279(D2) LTHH 250 4000 300 380.5(D1)/424(D2) 297(D1)/302(P2) LTHH 400 4000 400
380.5(D1)/424(D2) 297(D1)/302(P2) LTE 2-4002000
900 428
367
LTE 2-600
2000
900
430
370(D1)/365(D2) LTP 2-4002000
900 402
367
LTP 2-6002000
900 402
370
LTE 4-400
4000
900
429.4(D1)/379.3(D2) 394
LTE 4-6004000
900 429.4
423
LTP 4-4004000
900 402
394
LTP 4-6004000
900 402
423
LTE 4-20004000
1350 501
473
LTP 4-20004000
1350 501
473
D1/D2 [mm]
(1/2 poles)
48/106
60/130
70/160
70/160
80/80/220
80/80/85/175
85/85/85/119/151.5/-
Contactors
30
w
H
LTNS line
Applications
Transit and railway systems
Control of cranes
Rolling mills
Mining equipment
Renewable energy
D
Microelettrica Scientifica LTNS series have been developed to answer to the constantly
increasing market need of reduced dimensions and weight, taking most of the huge
know-how in designing and manufacturing of industrial bar mounted contactors.
These contactors have been designed starting from the N series electric arc management
concept, grafted on the light and compact structure of a rail unit, developed around
the control electromagnet.
The LTNS contactors, characterised by a nominal voltage of 750V, are available in a wide
range of current ratings, from 80A up to 1300A (up to 3 poles). They can be configured
in any combination of Normally Open or Normally Closed poles, with a common rating.
They have been designed and tested according to the international standard IEC 60947-4-1
and are suitable for almost any industrial low voltage application, such as: cranes, rolling mills,
electric energy production and transformation, photovoltaic panels, induction furnaces,
galvanic treatments.
General Characteristics
• The extra heavy duty flexible line, up to 1000VDC/AC application, up to 1500A/pole
• Stationary application only, derived from LTHS line
• 1-2-3 pole configuration, NO and NC poles indirect or direct arc blow out options available
• Flexible control and auxiliary contacts options, high unit customization possible
Systems & Components for I nfrastru ct u r e
31
Type
Ith [A]
Rated Nominal
Voltage Ue [V]
LTNS 60 80
600 LTNS 125 150 750 LTNS 320 320 750 LTNS 450 450 750 LTNS 650 700 750 LTNS 800 900 750 LTNS 1000 1100 750 LTNS 1250 1300 750 Rated Insulation Voltage Ui [V]
750 1000 1000 1000 1000 1000
1000
1000 D1/D3 [mm]
W [mm]
H [mm]
193
260
350
360
405
405
459
459
138
185
260
260
280
280
350
350
Length (1-3 poles)
72-130 86-169 105-277 105-277 105-277 105-277
125-340 125-340 Contactors
32
N line
Applications
Transit and railway systems
Power generation
Control high power motors
Heavy industries
Crane control
Type
N 85 N 125 N 190 N 270
N 350 N 550 N 650 N 800 N 1000 N 1250 N 1600 N 2000 N 3000 N 4000 N 6000 Thermal Current Ith [A]
85 125 190
270
350 550 800
650 1000 1250 1600 2000 3000 4000 6000 Microelettrica Scientifica N series bar mounted contactors, in spite of their 60 years
old technical concept are still state of the art for many industrial, low voltage, heavy duty
applications. These contactors are designed and tested according to the standard IEC 60947-4-1.
They provide excellent operational performances, making them the best choice for high power
load connection, often covering the function of a fault clearing protection device.
The N series contactors are characterised by modular design so that their configuration can be
tailored to the specific requirements of each application. In fact, the pole ratings cover a wide
range, from 85A up to 6000A, and can be mounted side by side regardless of their size
and number on a customisable length shafts set, this way offering custom solutions to a wide
range of technical needs.
The maintenance is simplified by direct accessibility to all parts due to open construction
so that, in most cases, it is not necessary to remove the contactor from the cabinet.
Microelettrica Scientifica has been certified since 1993 according to the International
Quality Standard UNI EN ISO 9001:2008. Microelettrica has always paid great attention
to the environment and is certified according to the standard UNI EN ISO 14001:2004
and all materials used are RoHS compliant.
Rated Nominal
Voltage Ue [V]
600 600 600 600 600 600 600 600 600 600 600 600 600 600 600 Rated Insulation Voltage Ui [V]
1000 1000 1000 1000 1000 1000
1000 1000
1000 1000 1000 1000 1000 1000
1000
D1/D4 [mm]
Length (1-4 poles)
250-400 250-400 250-400 250-500 250-500 105-277 300-600 350-650
350-650 350-700 350-800 350-800 400-1000 500-1250 600-1500 H [mm]
W [mm]
165
175
205
265
275
300
320
365
365
380
420
425
475
425
475
155
155
170
215
215
160
160
300
300
345
420
420
470
420
470
Systems & Components for I nfrastru ct u r e
33
General Characteristics
• The bar mounted modular extra heavy duty line, up to 1000VDC/AC application, up to 6000A/pole
• Stationary application only
• Up to 6 poles configuration, NO and NC poles direct arc blow out various aux contacts options
• Flexible control and adjustment configurations, total unit customization possible
Breaking Capacity
Contactor
N 85
N 125
N 190
N 270
N 350
N 550
N 650
N 800
N 1000
N 1250
N 1600
N 2000
N 3000
N 4000
N 6000
A.C. cos 0 = 0,5
I’ca [A] RMS value
D.C. L/R = 15 ms
I’cc [A] (2 poles)
Making
capacity
Ich
440 V
750 V 1000 V 220 V 440 V 660 V
1600 700 60017001000800
2100 1000 900 250015001000
2500 16001300300020001400
4300 25002000450030002500
4800 30002500500035003000
6000 45003900700050004000
8000 55004500900060005000
9500 6500 6000100007000 6000
12500 8000 7000130009000 7500
15000 10000 9000 160001200010000
20000 1500010000250001600012000
20000 1500010000300002000015000
30000 1500010000350002500018000
35000 2000010000400003000020000
40000 2000010000400003500020000
Consumption of coils
A.C. [VA]
D.C. [W]
[A] Pick-upHoldingPick-upHolding
2750 350 50 110 15
3500 450 60 130 15
4200 450 60 130 15
7000 1300 110 180 12
8500 1300 110 180 12
10000 1500 110 300 20
12000 – – 300 20
16000 – – 650 30
21000 – – 650 30
30000 –
– 1000 50
35000 –
– 1000 50
35000 –
– 1000 50
50000 –
– 1500 80
50000 –
– 1500 80
80000 –
– 2500 100
Operation
time
(m sec.)
Closing Opening
26 13
23
13
23
12
30
18
30
18
65
15
65
15
80
16
80
16
90
10
95
11
95
11
90
10
90
10
90
10
Mech.
endurance
in milion
operations)
15
15
15
15
15
15
10
10
10
10
10
10
10
10
10
34
Stationary
Neutral
Grounding
Short circuits between phase and ground can result in irreversible damage to networks
and equipments; it is therefore of the utmost importance to be able to control and reduce
their effects: Grounding Resistors limit the fault current that arises due to phase-neutral
short circuits. Grounding through resistor offers several advantages with respect to alternative
methods (such as insulated grounding, direct grounding or grounding through a reactance).
The main advantages are: easier detection of fault location, limitation of fault current,
no transient over voltages.
Relevant parameters in the design of a Neutral Grounding Resistor may vary greatly:
Microelettrica has developed a line of standard products (for the most common requirements)
along with tailored products, each developed and customised according to the required
project characteristics. Our products range from Low Voltage systems (<1kV) to High Voltage
(132kV insulation class), and from very low fault current values (tens of Amps)
to very high (>10kA).
The essential parameters needed to design a Grounding Resistor are:
• Nominal Voltage
• Fault Current
• Fault Duration (10s is customary)
Systems & Components for I nfrastru ct u r e
35
Other relevant parameters are:
• Protection degree of enclosure: from IP00 - i.e. no enclosure - to IP55, standard solution IP23
• Enclosure finish: our standard is mild galvanised, but different stainless steel grades (such as
AISI304 or AISI316) are available. Painting in the desired RAL colour is also an option
• Continuous current rating; it may affect significantly the performance of the resistor,
especially when high IP degrees are required
• Environment and Elevation: we design resistors for the harshest industrial or natural settings
• Auxiliary components: during our many years of operation we have selected a number
of trusted suppliers for a wide choice of components, such as Current Transformers,
Switches, Disconnectors, etc.
Applications
Energy
36
Stationary
Harmonic Filter
Quality of power is becoming ever more important for both suppliers and end users,
as the number of devices that may feed harmonics into power systems is increased,
resulting in higher line losses, interferences and resonances.
Harmonic Filters - made up by capacitors, inductors and resistors - help eliminating harmonics
which inevitably tends to occur. The LC circuit filters all spurious frequencies
and only let the fundamental frequency through, while the Harmonic Filter Resistors
(also referred to as Damping Resistors) dissipate harmonic currents into heat.
Typical applications for Harmonic Filters Resistors are HVDC networks
and electrical induction furnaces.
Our team of experienced engineers designs the best solution for the different
characteristics required and for the most diverse envinvironmental conditions.
Microelettrica can custom design Harmonic Filter Resistors from a few kW rating up to tens
of MW, as well as B.I.L. up to 600kV. Our Harmonic Filter Resistors employ non-magnetic low
temperature-coefficient elements, to minimise Ohmic value drift thus preventing excessive
power increase. They also have low parasitic inductance values, which is a key feature
for the effective design of damping elements.
Systems & Components for I nfrastru ct u r e
37
The essential parameters needed to design a Harmonic Filter Resistor are:
• Nominal Voltage
• Current or Power
• Ohmic Value (with tolerance in %)
Other relevant parameters are:
•B.I.L.
• Required Insulation Level: HV terminal to hearth, LV terminal to earth, between terminals
• Clearance and Creepage
• Enclosure finish: our standard is mild galvanised, but different stainless steel grades
(such as AISI304 or AISI316) are available. Painting in the desired RAL colour is also an option
• Environment: we design resistors for the harshest industrial or natural settings
• Maximum Inductance
• Bushing Layout: top or side mounted
• Mounting: three-phase stacked, side by side, others
Applications
Energy
38
Stationary
Load Banks ­
Load Banks allow to effectively check the efficiency of emergency sets (generators,
Uninteruptible Power Supplies) and can be employed as dummy loads to prevent wet
stacking on diesel engines. They represent a reliable and economic way to prolong the lifetime
of extremely expensive and important equipment.
Microelettrica custom designs Load Banks to satisfy all requirements, both in terms of power
to be dissipated (from tens of kW to tens of MW), insulation level (from hundreds of Volts
up to 36kV insulation class) and integration of the most diverse power steps, thanks
to the wide variety of grid element types designed and produced by Microelettrica itself.
Thanks to its many years of experience in both industrial and railway fields, Microelettrica
has also developed reliable ventilation curves, and can therefore offer forced-ventilated
Load Banks, which main advantage is that of allowing higher power-per-element and
thus smaller size. Microelettrica Load Banks are suitable for indoor and/or outdoor use;
they are placed in enclosures with up to IP23 protection degree. Ventilation can be horizontal
or vertical.
Systems & Components for I nfrastru ct u r e
39
Microelettrica Load Banks can be controlled either locally or remotely (on request),
through switches (also manufactured by Microelettrica Scientifica).
The essential parameters needed to design a Load Bank are:
• Nominal Voltage
•Power
• Number and type of steps, if any
• Type of ventilation (natural or forced)
Other relevant parameters are:
• Maximum Ohmic value drift: in case it is necessary to contain the thermal drift
of the resistance value, alloys with extremely low temperature coefficients can be used
• Protection degree of enclosure: up to IP23, standard IP20 (vertical ventilation)
or IP21 (horizontal ventilation, only for forced air cooled Load Banks)
• Enclosure finish: our standard is mild galvanised, but different
stainless steel grades (such as AISI304 or AISI316) are available.
Painting in the desired RAL colour is also an option
• Environment and Elevation: we design resistors for the harshest
industrial or natural settings
• Auxiliary components: contactors for step switching,
also manufactured by Microelettrica
Applications
Industry
40
Stationary
Starting
Braking
Discharge
Starting and Braking Resistors are widely employed for controlling motors during
start and/or stop.
Starting Resistors may be used for wound rotor induction motor and DC wound motor
(this last type of motor is less and less common): adding a series resistor to each rotoric
phase reduces the current and improves the starting torque. Starting Resistors may also
be employed for squirrel cage induction motors, where series resistors added to the stator,
limit initial current to three times its nominal value. Starting Resistors for squirrel cage
motors are also known as Ballast Resistors.
The essential parameters needed to design a Starting Resistor are:
•Horsepower
• Rotor/Stator Voltage
• Rotor/Stator Current
•RPM
• Application: different applications require different solutions
Crane control is a quite common application for Braking Resistors: during descent the load,
especially if heavy, may cause the motor to generate power. Resistors are thus used to avoid
unwanted and uncontrolled acceleration.
Systems & Components for I nfrastru ct u r e
41
Braking Resistors for large motors are customised to best comply with any requirement:
we have developed special Braking Resistors for important research institutes (among them
Max Planck Institute) and for energies in excess of 3400MJ.
De-excitation of large capacitors and inductors must be carried out with care to avoid
impulsive currents that could damage them permanently. Discharge Resistors limit the peak
current and protect the capacitive/inductive device.
The essential parameters needed to design a Discharge Resistor are:
• Nominal Voltage
• Discharge Current
• Discharge Duration
Discharge Resistors are often used by research institutes and they require a very high level
of customisation, sometimes also leading to the development of new technologies
for resistive elements. Microelettrica has cooperated with Universities all over the world
and with the most prestigious research centers (among them, CERN in Geneve).
Applications
Industry
Stationary
42
Line Test
Applications
DC Substation
High Speed DC circuit breakers are valuable components which must be protected against
wear and tear and excessive current flow. Before closing High Speed Circuit Breaker
on a power line, it is therefore advisable to test whether a short circuit is occurring by means
of line test resistors. The resistor is electrically connected through a contactor - if no fault
current is detected - then it is safe to activate the circuit breaker; otherwise, there is a fault
somewhere on the line. It is as well possible that activating the resistor for a few times
in a row (On - Off cycles with the desired number of consecutive on steps) may help in getting
rid of the physical cause of the short circuit.
The essential pieces of information needed to design a Line Test Resistor are:
• Nominal Voltage
• Test Current
• Duty cycle
Systems & Components for I nfrastru ct u r e
43
Stationary
44
Compact
Resistors
Applications
Braking/chopper resistors for variable
speed drives, in particular in the fields of:
Hoisting and conveying equipment
Compact and modern design, low inductance, can be subjected to pulse loads.
Resistance material support: moulded ceramic base
Resistance wire: NiCr-alloy special heat sink casing
Degree of protection: IP64 up to IP66
Printing and paper
Packing, plastic, textile
Wire and wood processing
Load and testing resistors:
• In test bays
• In narrow spaces
• In dusty and splash water environments
Systems & Components for I nfrastru ct u r e
45
Frame
Resistors
Applications
Braking/chopper resistors for frequency
converters, load and testing resistors
Flat modular design, high energy absorption capacity, low-inductance versions,
can be subjected to pulse loads.
Resistance material support: grooved ceramic insulators fixed on both longitudinal sides of a metal or temperature-resistant insulating material frame
Resistance wire: CuNi 44 or NiCr alloy
Taps (tapping eyes): on request
Degree of protection: IP00 - IP23 possible
Relays
46
A line
General Characteristics
The series of electronic analogic protective relays here below presented has been designed
according to the most advanced technologies in order to obtain the highest reliability,
accuracy and immunity to interference and is made with first choice components safely
dimensioned and protected.
The application of severe testing and quality control procedures guarantees the reliability
of the product.
Relays Type
PB../..
UB0-A
BI20/..
BI2C
BF3
UB./.
UB./.
UB0
UB./60
UB0/100
UB1/2/C
UB3/59-S
RBW
RRS
UB0/CR
RB4
RHS
RCA
UB0/ATR
Dual level current relay: 50/51
Earth fault current relay desensitised to the third harmonic: 51N
Two phase + earth fault overcurrent relay: 49, 51, 51N
Dual level D.C. current relay: 49, 76
Three phase breaker failure relay: 50BF
Under/Over-voltage relay: 27, 59, 45, 80
Dual level voltage relay: 27, 59, 45, 80
Zero sequence voltage relay desensitised to the third harmonic: 64
Voltage balance relay: 60
Relay for 100% generator stator earth fault protection: 64s
Battery positive/negative leakage to earth fault protection
Overvoltage relay for supervision of CTs ‘ circuits
Directional overcurrent relay: 32, 67, 67N
Automatic load sharing control relay for generators: 95
Rotor earth fault relay: 64R
Lock-out relay: 86
Rotating diode failure detection relay: 58
Trip circuit supervision relay: 74
High impedence differential relay: 87N(87G)
Main features:
• Measuring inputs supplied through internal adaptor transformers
• Multivoltage a.c. and d.c. autoranging power supply unit
• Draw-out modular execution on standard european size P.C. boards
• Fibreglass reinforced epoxy resin P.C. boards with tinplated copper tracks, solder mask
special silicon humidity protection and screen printed component designators
• P.C. board connectors with golden plated pins rated 10A continuous and 200A 1sec
Execution
“E” for flush mounting with back connection terminals, draw-out relay boards with automatic
short circuit of the current inputs. Transparent front cover. Protection degree IP54;
accessories for surface mounting (E/I) are also available.
“E/R” standard 19”3U (8 modules) or 6U (16 modules) rack with back connection terminals,
draw-out relay boards with short circuit of the current.
Systems & Components for I nfrastru ct u r e
47
Output Relays
Two versions are provided:
• Standard version: the output relays are de-energized on normal operating conditions and are energized on relay’s tripping
• Positive protected version (on request): the output relays are energized on normal operating conditions, (i.e. with auxiliary
supply on and input values at normal levels) and are de-energized on relay‘s tripping, failure of power supply, internal relay fault
Signalization
• Green led: auxiliary power supply presence
• Red led: trip indication
• Yellow led: trip memorization
Control
• Relay test with or without tripping of output contacts
• Automatic and/or local/remote reset of the output relays
• Local manual reset only for signal led
Blocking and Intertripping Circuits
On request are available:
• Blocking input (BI)
• Blocking output (BO)
• Time start output (TO)
135
164
Overall Dimensions: mm
RELAY PB3
83
1 MODULE
PANEL CUT-OUT
64X137 (LXH)
2
195
213
225
Relays
48
M line
General Characteristics
M line is a complete series of microprocessor based relays suitable for protection of high
and medium voltage systems; it offers a unique combination of performances, functionality,
innovation and reliability. The line is completed by a number of communication and control
modules giving a good level of modularity.
Relays Type
IM30-AB
IM30-AP
IM30-C
IM30-D
M-ARM513
SCM21
MM30
MM30-D
MM30-W
IM30-T
MD32-T
MD33-T
MTR33
IM30-G
IM30-B00
IM30-DR
MG30
MD32-G
SPM21
M-LIB3
M-HIB3
M-HIV3
MFP
UM30-A
UFD34
MU30
MW33
MX7-5
MX14-5
Measurements
• Real Time Measurements
• Maximum Demand and Inrush Recording
• Trip Recording (last 5 trips with date & time)
Technical Characteristics
• Complete self diagnosis program
• 8 Digit alphanumerical Display
• 8 Led for signalization
Control
• 5 Output Relays (programmable)
• 3 Digital Inputs
• Time tagged event recording
• Blocking Outputs and Blocking Input
for pilot wire selectivity coordination
Mounting
• 2 Module boxes
• IP44 protection case (on request IP54)
• Totally draw-out execution
Communications
• 1 RS485 Serial communication port on rear side
• Modbus RTU Communication Protocols
Software
• MSCom2 Program interface for device
management
Three-phase Overcurrent and Earth Fault - Dual Setting: 50/51, 50N/51N, 51BF
Three-phase Overcurrent and Earth Fault: 50/51, 50N/51N, 51BF
Capacitor Overload, Earth Fault And Unbalance Protection: 50/51, 50N/51N, 46N, 37, 51BF
Three-phase Overcurrent + Directional Earth Fault: 50/51, 50N/51N/67N, 59Uo, I2t, 51BF
Multishot Programmable Single/Three Phase Autoreclose: 79
Three Inputs Synchrocheck: 25, 27/59, 81.
Motor Protection: 12/14, 37, 46, 47, 48, 49, 50/51, 51LR, 64, 66
Motor Protection With Directional Earth Fault: 12/14, 37, 46, 47, 48, 49, 50/51, 51LR, 64N, 66
Motor Protection Relay With Voltage & Power Control: 12/14, 27/59, 37, 46, 47, 48, 49, 50/51, 51LR, 55, 64, 66, 81
Three-phase Thermal + Overcurrent + Earth Fault: 46, 49, 50/51, 50N/51N, 51BF, I2t
Percentage Biased Transformer Differential: 87, 87N
Percentage Biased Differential Relay For 3-winding Transformers: 87, 50/51
Transformer On-load Tap-Changer Control: 27, 59, 37, 50/51, 90
Multifunction Generator Protection: 32, 40, 46, 50/51, 51BF, 64S
Earth Fault Relay - Dual Setting: 50N/51N, 51BF
Three-phase Overcurrent with Directional Earth Fault + Autoreclosing: 50/51, 50N/51N/67N, 46, 79, 51BF
Generator Protection & Management: 21, 24, 27/59, 32, 37, 40, 46, 49, 50/27, 50V/51V, 51BF, 60FL, 64S, 81
Percentage Biased Generator Differential Relay: 50/51, 87N or 64S, F87, 51BF
Generator Synchronizing Relay: 25, 27/59/81, 90
Modular Low-Impedance Bus-bar Protection: 87B
High Impedance Biased Differential Relay: 87, 51BF
Three Phase High Impedance Busbar Differential Relay With Supervision of CT Secondary Circuits: 87B, 59S
Pilot Wire Differential Protection Relay for Cables & Lines: 87/85, 50/51, 51BF
Three-phase Voltage, Frequency & Zero Sequence Voltage with Vector Shift Detection: 24, 27d/59d, 47, 59, 59Uo, 81
Three-phase Digital 4-stage Frequency Relay With Df/dt & Dv/dt Control: 27/59, 81, df/dt, dv/dt
Multifunction Three-phase Measuring Unit
Power Management Relay: 27/59, 81, 32
Programmable Interface & Control Module: 7 Digital Inputs & 5 Output Relays
Programmable Interface & Control Module: 14 Digital Inputs & 5 Output Relays
Systems & Components for I nfrastru ct u r e
49
Wiring Diagram
RELAY PB3
25
25
25
26
26
26
27
27
27
28
39
29
28
39
29
28
39
29
41
30
32
43
31
41
30
32
43
31
41
30
32
43
31
42
42
33
In=5A
PRESA/TAP 31 lon=5A
PRESA/TAP 31 lon=1A
1/5A
1/5A
1/5A
33
AUXILIARY 12
SUPPLY
13
}
135
164
R1
F51
R2
F50N
R3
F51N
R4
KEYBOARD
134
2
F50
INT.FAULT
Overall Dimensions: mm
PANEL CUT-OUT
115X137 (LXH)
IM 3 0 - A B
FUNCTION
1/5A
R2
11
22 N.C.
7 (10)
9
8 N.O.
R3
18
20 N.C.
R4
19
4
6
MICROP.
R5
42
In=1A
33
R1
DISPLAY
195
213
225
R5
(21)
21
10 N.O.
B4
B3
B2
5
15
17
16
14
3
2
1
38
23
24
RS485
Relays
50
MC line
General Characteristics
The MC line has been designed to offer to the market a very competitive protective relay
responding to the latest requirements in terms of control and communication capabilities
with an extremely high level of modularity. Each relay includes a limited number of protective
functions but, thanks to their very compact sizes, different units can be combined in a modular
enclosure to satisfy the most demanding needs.
Measurements
• Real Time Measurements
• Trip Recording
(last 20 trips with date & time)
• Event recording (last 10 trips)
Control
• 4 Output Relays (programmable)
• 3 Digital Inputs
• Time tagged multiple event recording
• Oscillographic wave form capture
• Blocking Outputs and Blocking Input
for pilot wire selectivity coordination
• Associate C.B. control
Technical Characteristics
• Complete self diagnosis program
• Display LCD 16 (2x8) characters
• 4 Leds for signalization
Communications
• 1 RS485 Serial communication
port on rear side
• 1 RS232 Serial communication
port on front panel
• Modbus RTU/IEC870-5-103/IEC61850
Communication Protocols
Expansion Modules (optional)
• “UX10-4” 10 Digital Input and
4 Output Relays
• “14DI” 14 Digital Inputs
• “14DO” 14 Output Relays
Execution
• 1 Module box (2 modules with expansion)
• Totally draw-out execution
• IP44 protection case (on request IP54)
Software
• MSCom2 Program interface for device
management
Relays Type
MC1V
MC3V
MC20
MC30
MC40
MC20-R
MC30-R
MC30-BC
MCDC-I
MCDC-V
MCM
Multifunction Single Phase Overvoltage/Undervoltage Relay: 59, 27, 81>, 81<
Multifunction Three Phase Overvoltage/Undervoltage Relay: 59, 27, 81>, 81<, 59Vo, 59V2, 27V1
Overcurrent & Earth Fault Relay: 50/51, 50N/51N, 51BF
Three Phase Overcurrent & Earth Fault Relay: 49, 50/51, 50N/51N, 51BF
Three Phase Overcurrent & Earth Fault (connection with 4 CT ‘s): 49, 50/51, 50N/51N, 51BF
Overcurrent & Earth Fault Relay: 50/51, 50N/51N, 51BF, 79
Three Phase Overcurrent & Earth Fault with reclosing function Relay: 50/51, 50N/51N, 51BF, 79
Three Phase Overcurrent & Earth Fault + Broken Conductor Relay: 50/51, 50N/51N, 51BF, BC (I2/I2)
D.C. Current Relay: 76/32, 49, 51BF
D.C. Voltage Relay: 45, 80
Motor Protection Relay: 37, 46, 47, 48, 49, 50/51, 51LR, 64S, 66, 68
Systems & Components for I nfrastru ct u r e
51
Wiring Diagram
6
DISPLAY
6
7
1/5A
7
MC20
FUNCTION
In=
Ion=
1A
1A
4
4
5
5
8
8
9
9
R1
16
R2
18
R3
17
OUTPUT
14
RELAYS
MICROP.
F50
F51
F50N
F51N
1/5A
1/5A
INT.FAULT
15
R1
R4
13
R2
12
R3
D3
R4
D1
20
21 DIGITAL
19 INPUTS
D2
22
5A
5A
AUXILIARY
SUPPLY
C
A (S+)
B (S-)
10
11
KEYBOARD
BPMC
MS-SCE1828-R1
Overall Dimensions: mm
Overall Dimensions: mm
C/B
XXXX
CLOSED
XXXX
TRIP
XXXX
XXXX
XXXX
MC30
PWR
XXXX
I.R.F.
XXXX
164
135
C/B
XXXX
OPEN
XXXX
ENTER
RESET
+
RS232
SELECT
_
83
2
195
213
1 MODULE
PANEL CUT-OUT
64X137 (LXH)
225
3
2
1
RS485
Relays
52
Ultra line
General Characteristics
ULTRA is the top line of Microelettrica Scientifica protective relays; it has been designed
to meet the most demanding specifications for any application in Transmission, Distribution
and Industrial plants. The ULTRA relays are used in all the applications where, besides
the protection, a complete measuring system is needed. Each relay is a multifunctional unit
combining protection, measurements and control. Thanks to the CAN BUS communication
port and to a complete range of additional modules, the relays of this line can perform
a complex input/output logic for interlocking substation system avoiding the use
of an additional PLC. The multiprotocol makes the relay very versatile and suitable
to be implemented in the most common DCS and SCADA systems.
Recording
• Event Recording (last 100 events)
• Trip Recording (last 20 trips) complete with cause of tripping and values of the input
quantities at the moment of trip
• Oscillographic recording of input quantities
(8 channels, 32 sample/cycle, 3 sec each)
Control
• 6 Output Relays user programmable
• 4 Digital Inputs user programmable
• Blocking input and Blocking output for pilot
wire selectivity coordination
• Time tagging resolution 1ms
• Trip circuit supervision
• Associated Circuit Breaker control
(OPEN/CLOSE)
Technical Characteristics
• Graphical Display (128x64 dot)
• 4 Leds for signalization
• Multilanguage Display (English/Italian
standard, available - others on request)
• Complete self diagnosis program
with dedicated relay
Communications
• 1 RS485 Serial communication port on rear side
• 1 RS232 Serial communication port
on front panel
• Modbus RTU/IEC870-5-103/IEC61850/
TCP-IP Modbus
Communication Protocols
• Canbus port for external additional modules
Expansion Modules (optional)
• “UX10-4” 10 Digital Inputs
and 4 Output Relays
• “14DI” 14 Digital Inputs
• “14DO” 14 Output Relays
Execution
• 2 Module box (3 modules with 1 expansion,
4 modules with 2 expansion)
• IP44 protection case (on request IP54)
• Totally draw-out execution
Software
• MSCom2 Program interface for device
management
Relays Type
U-MLEs
U-MLC
U-MLC- M
DTMR
FMR MMR
GMR
D.C. Feeder Manager Relay: 49, 32/76, 80, 45, 64, 79, DI, di/dt, Rapp, Iapp, CMI, LT, BF
D.C. Feeder Manager Relay (Italian Railway Certification): 27/59, 32, 45, 49, 64, 76, 79, 80
D.C. Energy Metering: I, V, W, E
Differential Transformer Relay: 50/51, 87T, 87N/51N
Feeder Manager Relay: 49, 50/51/67, 50N/51N/67N, 27/59, 81, 46, 59Uo, 51BF, F 27U1, 59U2/47, 79
Motor Manager Relay: 12/14, 37, 27/59, 46, 49, 50/51, 51LR, 51BF, 55, 64, 66, 81
Generator Protection & Management Relay: 21, 24, 27/59, 32, 37, 40, 46, 49, 50/27, 50V/51V, 51BF, 60FL, 64S, 81
Systems & Components for I nfrastru ct u r e
53
Wiring Diagram
A B C
A B C
2
A B C
3
4
1/5A
5
6
1/5A
2
7
8
3
4
5
6 2
7 3
8 4
9
5
6
9 6
5
1/5A
41
7
8
41 7
1/5A
1/5A
42
43
In=
1A
Relay
Io
Feeder
44 41
42
43
45 42
47
44
45
44
47 45
48
46
48 46
47
47
48
48
46
Relay
POWER
TRIP
POWER
43
ON
TRIP
Vo
ON
OFF
Vo
OFF
R1
R1 R3
R2
R2
15
14
24
35
R3
15
14
24
35
R4
34
R3
R2
R4 R5
R3
R5
R4
R6
R5
R6
FRONT- RS232
MS-SCE1844-R3
R6
BPU
RS485
CAN
C
H
L
CAN
Overall Dimensions: mm
164
C LOSED
I
U
f
P
ULTR Q
A-M R E L AY
OPEN
OPEN
ULTR A-M R E L AY
100 A
30.00 kV
50.01 Hz
5190 kW
2514 kVA r
100 A
30.00 kV
50.01 Hz
5190 kW
2514 kVA r
POWER
EXPANSION
UNIT
TRIP
C LOSED
POWER
OPEN
<Menu> EXPANSION
UNIT
TRIP
<Menu>
C LOSED
ULT R A-M R E L AY
I
U
f
P
Q
100 A
30.00 kV
50.01 Hz
5190 kW
2514 kVA r
I
U
f
P
Q
100 A
<Menu>
30.00 kV
50.01 Hz
5190 kW
2514 kVA r
OPEN
<Menu>
135
TRIP
X
POWER
I
U
f
P
Q
164
C LOSED
X
X
TRIP
X
POWER
I
I
ULT R A-M R E L AY
O
O
I
F MR
RS232
I
RS232
F MR
O
O
RS232
185
F MR
PANEL CUT-OUT
165X137 (LXH)
134
RS232
PANEL CUT-OUT
115X137 (LXH)
F MR
32
13
22
31
D1
D2
D3
D4
D1
D2
D3
D4
195
213
232
TRIP
COIL 34
SUP.
(25) 23
TRIP
COIL SUP.
(25)
N.O.
N.C.
N.O.
33
N.C.
32
33
R6
BPU FRONT- RS232
MS-SCE1844-R3
23
R5
S+
S- RS485
C
AUXILIARY
SUPPLY
25
26
R4
AUXILIARY
SUPPLY
Un= 23OVac MAX.
25
26
R2
Manager
Io
R1
R1
Manager
ULTRA
8
5A
5A
Un= 23OVac
MAX.1A
Ion=
Feeder
1/5A
9
5A
5A
ULTRA
1/5A
1/5A
41
46
1A
1A
A B C
42
43 9
44
45
In=
Ion=
2
3
4
S+
SC
C
H
L
12
28
18
29
19
38
27
17
16
36
37
13
22
31
12
28
18
29
19
DIGITAL38
INPUTS
27
17
16
36
DIGITAL
INPUTS
EXPANSION
MODULE
EXPANSION
37
MODULE
Relays
54
N-DIN line
General Characteristics
The N-DIN line has been conceived to obtain the most efficient space/performance as well
as cost/performance ratio. The execution of the relay is for DIN Rail, but its Front Face Panel
(FFP) - including Controls, Signals and Display - is removable and can be flush mounted apart
from the Relay Main Body (RMB), on the front panel of the switchboards or the motor control
centres. One FFP only can control up to 31 RMB units. The relay main body RMB can also be
used as a stand-alone unit, without the front panel FFP.
Measurements
• Real Time Measurements
• Trip Recording (last 5 trips with date & time)
• Load Profile recording
Technical Characteristics
The Relay Main Body (RMB) includes:
• 2 Self powered programmable Digital Inputs for remote controls (start, stop, rev., ETC)
• 1 RTD input or User available Digital Input
• 2 Programmable output relays each with one N.O. contact rating 6A
• 1 RS485 port for connection to the communication serial bus (Modbus RTU)
• 1 RS485 port for communication to the Front Face Panel
• 2 Signal Leds, 1 Reset button
The Front Face Panel (FFP) includes:
• 2x16 characters LCD display
• Four Key buttons for local relay management, Four signal leds
• One RS232 port for connection to a local PC (on front side)
• One RS485 port for interconnection with the RMB (on back side)
• Complete self diagnosis program
Mounting
• DIN46227 (EN50022)
Relays Type
N-DIN-MA
N-DIN-F
N-DIN TO64
Accessories
EX-I/O
CPB
TA-DIN
TAR-DIN
Motor Protection Relay: 37, 46, 49, 51, 51LR, 64/51N, 66
Feeder Protection Relay: 46, 49, 51, 50N/51N, 51BF
D.C. Current Relay with High Sensitivity Hall Effect Transducer: 64, 51BF
Input/Output Expansion Module
Profibus Converter Module
Current Transformer
Current Transformer
Systems & Components for I nfrastru ct u r e
55
Wiring Diagram
A
B
C
A
A
15
B
B
C
C
A
A
15
14
13
13
12
B
14
14
13
15
12
12
10
C
C
A
B
10
11
11
FFP
Dispay / Keyboard / Signal
AB+0
FFP RS485
15
C
15
14
14
13
13
12
12
10
11
B
15
Dispay / Keyboard / Signal
AB+0
RS485
RS485
14
13
12
10
10
11
11
8
Digital
Digital Input
1 Input 1
9
Digital
Digital Input
2 Input 2
7
Digital
Digital Input
3 Input 3
Common 6
Common
AB+0
N  DIN  MA
AB+0
FUNCTION
N
 DIN  MA
FUNCTION
F26
F26
F37
F37
F46
F46
F49
F49
F51
F51
F51
F51 LR
LR
F64
F64
St.
St. Ctrl
Ctrl
10
11
8
9
7
6
D2 D2
D1 D1
D3 D3
PWR // I.R.F
PWR
I.R.F
Trip
Trip
ON
ON
OFF
OFF
21
AUXILIARY
21
AUXILIARY
SUPPLY 22
SUPPLY
22
RMB
RS485
RMB
19
R1
19
R1
R2
20
20
R2
16
17
H
H
C
C
3
B S
B S4
A S+
17
1 TO
1 TO
2 EXI/O
2 EXI/O
L
L
16
A S+5
3
4
RS485
5
RS485
MSSCE1872R1
MSSCE1872R1
Overall Dimensions: mm
TRASPARENT COVER
Dimension 45x108
Height = 9
90
96
50
85
O3
O3
FFP
Height= 16
106
96
FFP
Height= 16
DIN 46277
(EN 50022)
50
106
45
90
PANEL
CUT -OUT
TRASPARENT COVER
Dimension 45x108
Height = 9
45
REMOVABLE
35FRONT FACE PANEL
(FFP) CUT -OUT
35
85
REMOVABLE
FRONT FACE
(FFP)
106
RMB
Height = 72
106
RMB
Height = 72
DIN 46277
(EN 50022)
56
Relays
MSCom2
Interfacing Program
MSCom2 is a communication program for Windows systems allows to:
• Simultaneously communicate on serial port with up to 250 Microelettrica Scientifica relays
• Save data coming from relays on disk
• Manage the configurations of many relays at the same time and store information
on hard disk
• Print data as tables or diagrams
• Periodically poll the relays and send measurement or event data directly
to the hard disk or a printer
• Access the relays via modem (PC-modem …….. modem-relays)
• Access the relay over TCP/IP protocol
• On-line firmware update
• Prepare off-line relay setting files and directly up load relay’s memory
System Requirements
• IBM P.C. compatible computer
• Pentium 3 microprocessor (recommended Pentium 4 or higher)
• Min. 1 MByte RAM (recommended 2 MByte)
• Min. 200MB free on hard disk
• Min. 1 serial port dedicated to communication
• Resolution min.: 640 x 480, 256 colors (recommended 1024x768, 65535 colors)
•Keyboard
•Mouse
• Operating systems: Microsoft Windows
Supported Lines
ULTRA-Line, MC-LIne, M-Line, N-DIN-Line
Systems & Components for I nfrastru ct u r e
57
MSCom2 Software
Actual Measurements
System Settings
Oscillographic wave form
Function Settings
58
Relays
MHCO line
DC measuring converter
General Characteristics
The DC measuring transducers MHCO are the transducers for high voltage
measurement designed by Microelettrica Scientifica. The MHCO are designed
and manufactured to allow safe and full isolated HV measurement of DC
currents and Voltages. They find their main application in all the DC Traction
Substations (Railways, Tramways and Metro) where, directly connected
to the high voltage systems (750V, 1,5kV and 3kV) gives very accurate
and safe analogue outputs for measuring and protective purposes.
The MHCO line includes three models:
MHCO-TV
For VOLTAGE measurement.
Directly connected to the
high voltage line up to 6kV
through internal voltage
divider.
MHCO-TI
For CURRENT measurement.
Connected to the high
voltage line through
a dedicated shunt
(not supplied).
MHCO-TVI
For combined CURRENT
& VOLTAGE measurement.
Connected to the high
voltage line up to 6kV
through internal voltage
divider & through a
dedicated shunt (not
supplied).
Highlights
• HV Transducer for Current & Voltage measurement
• Direct Connection up to 6kV
• Fibre Optic connection between HV transmitter and LV receiver
• Measuring channel fully redundant
• Autoranging Multivoltage Power supply (self-powered version available as optional)
• Compatible with traction application standard
Transmitter Unit
Three different models available, one for each type of transducers (current, voltage and
current/voltage). Directly connected to the High Voltage DC system acquires the input signals
by a redundant input channel and transmit them, after comparison and confirmation of
validity, to the receiver unit through dedicated Fibre Optic connections. It has an autoranging
multivoltage Power supply. As option a self powered version is available; in this case
the power supply is directly taken from the line voltage through a set of dumping resistors.
Receiver Unit
Two models available, respectively suitable to be connected to the current and to the voltage
transmitter by means of a dedicated Fibre Optic connection. The input signal is converted
into 4 linear analogue output signals independently programmable (ie. 0-20/4-20mA etc..).
The setting of this unit can be easily done using our MSCom2 software tool.
Systems & Components for I nfrastru ct u r e
59
The receiver is equipped with two output relays: one relay is used for self diagnosis (it trips in case of interruption
of the Fibre Optic channels or internal failure of the receiver unit, including power supply failure or as alarm for measurement
discrepancy between the two transmitter channels); the second relay can be programmed as alarm for under/over voltage
and/or current level. Optionally a Front face display and Keyboard panel is available for local measurement and programming.
Fibre Optic Link
Transmitter and Receiver units are connected by means of a Fibre Optic link which guarantee a very hight insulation level.
Two Fibre Optic type are available both provided with standard ST connectors:
PLASTIC FIBRE: 62,5/125µ
GLASS FIBRE:
200 m HSC
The standard length of the fibre optic connection is 5 meters, other lengths are available on request.
Characteristics Transmitter/Receiver
Measurement solution: 0.1% of full scale @ (20/+70)°C
Responce time: 200ms
Connection: Fiber optic type 200.230.500m HCS (plastic) or 62.5/125m (glass) connection type ST
Fiber optic standard length 5m (max 1 km with glass fiber)
Wiring Diagram
MHCO-T-V
MHCO-T-VI
Vaux
MHCO-T-I
Vaux
ALARM
(OPTIONAL)
DIAG.
EXT. RESET
(OPTIONAL)
MHCO-R-V
Vaux
Vaux
ALARM
(OPTIONAL)
DIAG.
(*)
(*)
EXT. RESET
(OPTIONAL)
MHCO-R-I
OUT 3
OUT 2
OUT 1
(*) Version with optional display shown in the figure
OUT 3
OUT 2
OUT 1
Vaux
60
Transducers
MHIT line
DC measuring converter
General Characteristics
The DC measuring transducers MHIT are the latest generation of transducers
for high voltage measurement designed by Microelettrica Scientifica. They are
the result of the long experience of Microelettrica in this field with the addition
compared to the previous line (MHCO) of the full redundancy of the measuring
channel which gives a further level of reliability to the product. The MHIT are
designed and manufactured to allow safe and full isolated HV measurement
of DC currents and Voltages. They find their main application in all the
DC Traction Substations (Railways, Tramways and Metro) where, directly
connected to the high voltage systems (750V, 1,5kV and 3kV) give very
accurate and safe analogue outputs for measuring and protective purposes.
The MHIT line includes three models:
MHIT-V
For VOLTAGE measurement.
Directly connected to the
high voltage line up to 6kV
through internal voltage
divider
MHIT-I
For CURRENT measurement.
Connected to the high
voltage line through
a dedicated shunt
(not supplied)
MHIT-VI
For combined CURRENT
& VOLTAGE measurement.
Connected to the high
voltage line up to 6kV
through internal voltage
divider & through a
dedicated shunt
(not supplied)
Highlights
• HV Transducer for Current & Voltage measurement
• Direct Connection up to 6kV
• Fibre Optic connection between HV transmitter and LV receiver
• Measuring channel fully redundant
• Autoranging Multivoltage Power supply (self-powered version available as optional)
• Compatible with traction application standards
Transmitter Unit
Three different models available, one for each type of transducers (current, voltage and
current/voltage). Directly connected to the High Voltage DC system acquires the input signals
by a redundant input channel and transmit them, after comparison and confirmation of
validity, to the receiver unit through dedicated Fibre Optic connections. It has an autoranging
multivoltage Power supply. As option a self powered version is available; in this case the
power supply is directly taken from the line voltage through a set of dumping resistors.
Receiver Unit
Two models available, respectively suitable to be connected to the current and to the voltage
transmitter by means of a dedicated Fibre Optic connection. The input signal is converted
into 4 linear analogue output signals independently programmable (ie. 0-20/4-20mA etc..).
The setting of this unit can be easily done using our MSCom2 software tool.
Systems & Components for I nfrastru ct u r e
61
The receiver is equipped with two output relays: one relay is used for self diagnosis (it trips in case of interruption
of the Fibre Optic channels or internal failure of the receiver unit, including power supply failure or as alarm for measurement
discrepancy between the two transmitter channels); the second relay can be programmed as alarm for under/over voltage
and/or current level. Optionally a Front face display and Keyboard panel is available for local measurement and programming.
Fibre Optic Link
Transmitter and Receiver units are connected by means of a Fibre Optic link which guarantee a very hight insulation level. Two
Fibre Optic type are available both provided with standard ST connectors:
PLASTIC FIBRE: 62,5/125µ
GLASS FIBRE: 200 m HSC
The standard length of the fibre optic connection is 5 meters, other lengths are available on request.
Characteristics Transmitter/Receiver
Measurement solution: 0.1% Vn/0.05% Full Scale (2Vn)
channel (0¸1)In-0.05% In/0.05% Full Scale
channel (0¸10)In-0.5% In/0.05% Full Scale
Accuracy class:
0.2
Response time:
200ms
Connection: Fiber optic type 200.230.500m HCS (plastic) or 62.5/125m (glass) connection type ST
Fiber optic standard length 5m (max 1 km with glass fiber)
Wiring Diagram
LINE
+
_
LINE
+
_
C
B
A
LINE
+
_
C
B
C
MHIT-T V
B
A
B
MHIT-T VI
A
MHIT-TI
R2
R2
R1
CH3
R1
CH3
Vaux
CH4
Vaux
CH4
MHIT-RV
CAN Bus
MHIT-RI
CH2
CH1
CAN Bus
CH2
CH1
62
G Line
G PRO Line
DC SUBSTATION PROTECTIVE RELAY
32, 45, 49, 64, 76, 79, 80
General Characteristics
DC Feeder protection relay with setting parameters
programmable locally or via serial communication.
Suitable for protection of DC Feeders with
High-Speed DC Breakers, for railway application.
REMOTE DISPLAY CONTROL
4.3”
10.4”
The relay measures the line current and voltage through
one transducer connected by a fiber optic.
The transducers (type MHIT) are galvanically insulated
via fiber optic and have the following measuring ranges:
• Real time measurements of primary input values can
be read continuously both from the optional display
and via communication protocols.
• Relay programming can be done both
via HMI and via serial communication.
Recording
• Six complete setting programs switchable locally or remotely
• Blocking input and Blocking output for pilot wire selectivity
coordination and intertripping scheems
• Event Recording (up to 1000)
• Trip Recording complete with cause of tripping and values
of the input quantities at the moment of trip (up to 1000)
• Oscillographic recording of input quantities
with programmable pre-trigger
Besides the normal Watchdog and Powerfail functions,
a comprehensive program of self-test and self diagnostic
provides:
• Diagnostic and functional test
• Dynamic functional test running during normal operation.
Any internal fault detected is indicated by a fault message
on the display and by de-energization of associated I.R.F. output relay.
Communications
Modbus RTU / IEC870-5-103 / IEC61850 (redundant)
on RJ45 and fiber optic communication protocols;
other on request
• USB 2.0
• RS485 serial communication port on Back Panel
• Synchronisation with other relays (resolution 1ms)
and with SNTP
• Transducer Direct Optical Fiber Plug-In
• Ethernet on RJ45 or Fiber Optic
Automation
• Number of inputs and outputs can be customized
to mach the application needs
• PLC features are available in the protection
• Automation Blocks allow an easy setting
of the substation logics
Accessories
• High-Voltage Current/Voltage measuring Transducer
with Fiber Optic output: Type MHIT
• Cable monitoring system MSG/N-DIN independent tripping
and measurement
• Cable Screen-to-Ground and Conductor-to-Screen monitoring
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Typical Characteristics
Accuracy at reference value of influencing factors
Input
Output
Output trip relays
1% In
for measurements
2%+/-10ms
for times
0 ÷ 40 mA or Fiber Optic
0 ÷ 40 mA or 0 ÷ 10V
rating 5A; Vn = 380V
A.C. resistive switching = 1100W (380V max)
make = 30 A (peak) 0.5 sec.
break = 0.3A, 110Vcc,
L/R = 40 ms (100.000 op.)
Order code - Example:
G-Pro1
Power Supply
1
Input
1
Output
1 = 0 ÷ 40 mA
2 = Fiber Optic 1 = 0 ÷ 40 mA
2 = 0 ÷ 10V
1 = Type 1 : 24V(-20%) / 110V(+15%) a.c. - 24V(-20%) / 125V(+20%) d.c.
2 = Type 2 : 80V(-20%) / 220V(+15%) a.c. - 90V(-20%) / 250V(+20%) d.c.
Direct driven axial fans
64
AF/LA
Series
Applications
Aircoolers
Heat exchangers / Radiators
Cooling of electrical machines
(motors, converters, inductors,
generators, transformers)
Naval
Ventilation and
Air Conditioning Plants
The medium performance “AF” and “LA” fan Series were designed to meet the majority
of cooling and ventilation requirements typical of industrial applications. They were conceived
to provide the best mix of reliability, versatility, performance, quality, environmental impact
and cost. All of these products have features making them easily compliant with the most
widespread technical specifications and allowing significant modification based on specific
customer requirements. Direct-coupling solutions with motors from 2 to 16 poles are
available, to suit fan performance and noise requirements. Belt-driven solutions with larger
diameters and selected speed are also available (see “AFT”).
The “AF” and “LA” Series are versatile and reliable, characteristics that make them the COMET’s
most successful products, suitable for the most frequent ventilation needs. COMET “AF”
and “LA” Series of fans have proved their efficiency every day in over 60 countries worldwide,
in extreme climates, harsh environments and a wide range of temperatures for the most
demanding operations.
These Series of fans are selected using COMET’s dedicated software, based upon the results
of a huge number of tests performed by COMET on test tunnels and actual installations.
The selection is based on five blade profiles in aluminium alloy, and others in fibreglass
or polypropylene, with number of blades varying between 3 and 12 blades.
General Characteristics
AF
• Impellers with aerofoil profile blades in extruded aluminium alloy low-noise type
• Adjustable blade pitch when standstill
• Three-phase motors IP55 with Class F or H insulation, 50/60Hz, 2-16 pole, from the best
European manufacturers
• Casings in carbon steel, electro-welded, with anti-corrosive finishing by hot-dip
galvanization
Wide range of ancillary parts and customizations
Special versions with special materials, certified components, motors according
to customer’s specifications.
Impellers in PPG, FRP or steel are available upon request
LA
• Impellers with aerofoil profile blades in PPG, low-noise type
• Three-phase motors IP55 with Class F insulation
• Casings in carbon steel, electro-welded
• Finishing by hot-dip galvanization: longer durability in harsh environment
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65
LA
AF
Technical Data
Series
AF
LA
Diameter [mm]
400 ÷ 2400
310 ÷ 800
Air Flow
up to 400000mc/h
up to 35000mc/h
Pressure
up to 1500Pa
up to 800Pa
Power [kW]
0.55 ÷ 90
0.25 ÷ 7.5
Belt-driven axial fans
66
AFT
Series
Applications
Aircoolers
The “AFT” Series fans are designed for applications requiring very high air flows
and medium-low pressures, when it is impossible or unadvisable to couple the impeller
direct to the motor.
Heat exchangers
Cooling towers
Condensers
Ventilation Plants
They are normally used in the presence of:
• large diameters (air coolers, heat exchangers, cooling towers)
• dusty atmospheres
• high temperatures of the air flow
• low noise installations
• need to set the motor outside the air flow for access
Supports and drives are sized by COMET according to criteria based on 20 years of experience
and hundreds of installations. For some models the bearing blocks are designed and built
entirely by COMET.
The “AFT” Series fans are selected using the COMET’s dedicated software, which provides
a clear and concise data sheet with operating curves, including electrical and noise level data,
as well as preliminary outline drawing. The selection is based on five blade profiles, with number
of blades varying between 3 and 12 blades. This versatility gives unrivalled design options
when selecting a fan unit.
General Characteristics
• Impellers with aerofoil profile blades in extruded alluminium alloy low-noise type
• Adjustable blade pitch when standstill, or autovariable in operation
• Three-phase motors IP55 with Class F or H insulation, 50/60Hz, 2-16 pole,
from the best European manufacturers
• Casings in carbon steel, electro-welded, with anti-corrosive finishing by hot-dip
galvanization
• V-belt or toothed belt drive, with heavy-duty bearing blocks and external grease lines
Wide range of ancillary parts and customizations
Versions with special materials, special dimension, motors according to customer’s
specifications.
Impellers in PPG, FRP or fitted with anti-corrosion coatings are available upon request
Systems & Components for I nfrastru ct u r e
67
AFTN
AFTS
AFTE
Technical Data
Series
Diameter [mm]
Characteristics
Power [kW]
AFTE
800 ÷ 2240
Motor mounted outside the fan and the airflow
0.55 ÷ 45
AFTS
2000 ÷ 4800
With vertical axis, motor mounted 0.55 ÷ 90
under the fan ring on a bridge (for aircoolers)
AFTN
Motor mounted inside the fan casing, fully enclosed
1600 ÷ 2240
0.55 ÷ 55
High efficiency axial impellers
68
MAP/AVP/MF/XF
Series
Applications
Aircoolers
Heat exchangers / Radiators
Cooling towers
Condensers
Axial Fans
COMET aluminium impellers come in 4 different construction types, aimed at satisfying
numerous industrial applications. COMET manufactures 10 different blade profiles and three
different impeller designs, giving rise to one of the most extensive and efficient product
ranges available on the market.
The larger Series can be selected for large installations with diameters up to 12 metres.
The smaller Series are suitable for installation on equipments, machineries or in environments
requiring ventilation or cooling, and on small and medium fan units with diameters starting
from 350mm.
The “MAP” and “AVP” Series impellers have high-efficiency and low-noise blades made
of extruded alluminium alloy. All “MAP” models have variable pitch blades with motor stopped,
while “AVP” impellers have variable pitch blades in operation. They were designed to provide
precise and continuous adjustment of the air flow as the thermal conditions of the system
vary. The blade pitch variation is controlled pneumatically and these impellers are supplied
complete with rotating joint for connection to the line and with precision position valve.
Special versions of all COMET impeller Series are available for critical operating conditions
or special environments.
The extensive production in aluminium is supported by “MF” and “XF” Series of impellers,
with blades made of fiberglass-reinforced plastic (FRP-GRP-PPG). These Series have Very
Low-Noise characteristics and are suitable for corrosive environments.
By using COMET selection software, it is possible to select the most advantageous
combination of speed, number of blades and blade profile to obtain the best results
in terms of noise and power consumption.
Technical Data
Series
Blade Material
MAP
Aluminium
AVP
Aluminium
MF
FRP – GRP
XF
FRP – GRP
Hub Type
F
P
D
P
D
D
D
Blade Series
12 / 1N
1N / 2N / 3N / 31
2N / 3N / 4N / 8N / 31 / 51
1N / 2N / 3N / 31
2N / 3N / 4N / 8N / 31 / 51
MF
XF
Diameter Range [mm]
350 ÷ 1000
500 ÷ 3100
1000 ÷ 12000
1120 ÷ 3100
2000 ÷ 8000
1200 ÷ 10000
2000 ÷ 12000
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MAP
AVP
MF
For classified areas (Zone 1/21 and 2/22)
70
ATEX
Fans
Applications
Refineries
Chemical plants
Turbines
Plants and installations with
presence of dangerous gas or dust
Most of COMET’s fans can be supplied in the ATEX certified version (Directive 94/9/EC).
Series AF/AFT/AFH/AFTH/CNX are always available in ATEX versions.
All these fans are equipped with motors and components of leading brands and are
rigorously certified.
Materials and components are checked and recorded for complete traceability.
Design, manufacture and testing are carried out by COMET in accordance with the procedures
established by the COMET ATEX Technical File, filed with ICIM (ATEX Notified Body).
COMET products are certified for the following categories:
• Group II, category 3G
• Group II, category 3D
• Group II, category 2G
• Group II, category 2D
The general characteristics and the performances of the products do not vary when
they are produced in the ATEX versions. At the same time, it is still available an high grade
of customization according to the installation needs and the project specifications.
General Characteristics
• Impellers in carbon steel, stainless steel, alluminium, FRP or PAGAS
• Three-phase motors IP55/IP65, with Class F or H insulation, T3 / T4, Ex-N / Ex-d, 50/60Hz,
suitable for inverter supply
• Casings in carbon steel or stainless steel, electro-welded, with bolted anti-spark track
• Finishing by 3-layers epoxy-pack painting, certified for 500 hours salt mist test resistance,
or hot-dip galvanization
• Cables and electrical components made by leading brands and certified
• ATEX certificate and running test report is supplied with each unit
Wide range of ancillary parts and customizations
Versions with special materials, special dimension, motors according to customer’s
specifications.
Systems & Components for I nfrastru ct u r e
71
ATEX
Technical Data
Series
AF-Ex
AFT-Ex
AFH-Ex
AFTH-Ex
CNX-Ex
Diameters [mm]
400 ÷ 2400
1000 ÷ 4800
400 ÷ 1800
200 ÷ 700
400 ÷ 1400
Characteristics
Medium-performance direct drive Axial
Belt driven Axial
High Performance Axial
Belt-Driven High Performance Axial Centraxial
Power [kW]
0.55 ÷ 90
1.5 ÷ 75
1.1 ÷ 90
0.55 ÷ 30
1.5 ÷ 55
Microelettrica USA
Microelettrica do Brasil
MS Resistances France
Heine Resistors Germany
Microelettrica Scientifica Italy
Comet Fans Italy
Casram Rail Italy
MST Elektroteknik Turkey
MS Sales Office within KB Moscow Russia
Microelettrica Scientifica South Africa
MS localization within Knorr-Bremse India
For information on sales
network and products please visit
www.microelettrica.com
5020730 - INB - Rev. April 2016
Microelettrica-Heine (Suzhou) China