Medium Voltage
Distribution
GMset
MV Gas Insulated Switchgear
up to 24kV
GMset
Contents
pages
General presentation
Protection and control of electrical networks
Main characteristics of medium voltage equipment
Functional units
General features
Choice
Description
Protection monitoring and control
Switchboard monitoring and control
Functional unit protection
Current, voltage transformers and live line testing
Apparatus
SF1-G and SF-1P circuit breakers
GMh and RI operating mechanisms
GMh and RI auxiliary diagrams
Installation
Cable terminations
Example of layout
Environment
Preserving the environment
1
2
4
6
8
10
14
16
17
18
20
21
22
23
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Schneider Electric
GMset
General presentation
Protection and control
of electrical networks
For over 30 years, Schneider has been providing Medium Voltage electrical network
protection, monitoring and control solutions in the public distribution, industry and
building sectors.
GMset is a range of medium voltage equipment included in an offer that covers all
the functions required for network operation.
Public distribution networks
Network telecontrol (SCADA & DMS)
Milenium
Main functions:
b supervisory control and data acquisition,
b network restoration,
b wallboard replacement,
b geographic and schematic views,
b switching schedules,
b safety, checks and documentation,
b outage statistics,
b management of maintenance operations,
b management of construction programs.
HV/MV substation control
Talus
Main functions:
b remote control,
b HV and MV protection integration,
b data and alarm logging,
b centralized local control.
Industrial and building networks
Protection, monitoring and control
Isis - Powerlogic SMS
Sepam - Circuit Monitor - Power Meter.
Main functions:
b installation display,
b real time access to protection and control units,
b alarm management,
b data analysis,
b electricity consumption management,
b power availability and quality,
b protection functions,
b web technology.
Schneider Electric
2
GMset offer
Three levels of components are available to protect, monitor and control the medium
voltage switchboard:
b A control and monitoring system interfaceable with a higher level system.
b Sepam: protection and control unit for each switchgear unit (or cubicle).
b GMset units: medium voltage equipment comprising cubicles with breaking
devices, sensors, medium voltage connections and low voltage auxiliaries.
Pre-engineered and adaptable solutions
The three levels of components may be provided to make up:
b global solutions from the control centre to the MV switchgear,
b partial solutions which include 1, 2 or 3 levels of components to fit into projects for
new substations and retrofitting, extending and revamping existing installations.
Services
b
b
b
b
3
Equipment design, installation and maintenance.
Personnel training.
Electrical network availability studies.
Extended warranty.
Schneider Electric
GMset
General presentation
Main characteristics
of MV equipment
GMset is indoor, metalclad switchgear designed for the MV section of HV/MV
and MV/MV substations.
GMset complies with the International (IEC) and European standards.
GMset’s design and functions take into account the three main categories of users
requirements.
b Investment Optimization and Profitability.
b Service continuity.
b Safety.
Investment Optimization and Profitability
These are achieved through GMset capability to meet all users requirements in the
most cost-effective way possible.
With GMset, the user benefits from:
b the most compact equipment ever built in the medium voltage field, providing users
with a high degree of space savings when building or replacing a HV/MV or MV/MV
substation,
b pre-engineered solutions built upon the group’s worldwide experience and
collaboration with consultants and contractors, providing users with considerable
time savings when specifying needs,
b the shortest delivery and installation time possible, providing users with fast
commissioning and quick return on investment,
b a complete range of remote protection, control and monitoring functions when
requested by users who want to set up a supervision system in order to optimize their
energy supply.
Service continuity
Service continuity is achieved by means of GMset, which is a highly reliable
equipment offering with all the required functions to provide users with maximum
energy availability and quality.
With GMset, the user benefits from:
b expertise developed by the group in the area of operating dependability thanks to
feedback on experience gained with an installed equipment base of 100.000 cubicles
and 200,000 medium voltage circuit breakers,
b quality organization in accordance with the ISO 9000 and ISO 14001 standards,
b the latest CAD/CAE techniques with 3D modeling of electric fields in SF6 and
insulating materials,
b fully factory-tested equipment with type test reports available for each
performance and type of cubicle,
b a supervision offer open to all specifications regarding substation management
and enabling users to control and follow up their energy supply,
b equipment that cannot be affected by humid, dusty, corrosive or polluted operating
environments since all live parts are contained in SF6 filled and sealed enclosures,
b suitable for installation over 1000 mt (a.s.l.),
b tested against seismic activities according to IEC 68.3.3 (please, consult us).
Safety
Maximum safety is achieved through GMset’s design and functions.
With GMset, the user benefits from:
b a very comprehensive set of mechanical and electrical interlocks preventing
operator errors and compliant with the user’s security protocol,
b internal arc withstand of all the functional units, validated in accordance with IEC
60298, appendix AA, criteria 1 to 6, class A accessibility,
b a complete range of protection and control features with the Sepam range, suitable
for any function requested by the user,
b equipment which is part of the GIS range with all live parts completely segregated
from operators since they are fully contained in sealed enclosures.
Schneider Electric
4
General characteristics
The values below are given for normal operating conditions as defined in IEC 60298
and 60694.
rated voltage (kV)
rated insulation level
power-frequency withstand voltage (kV) rms
lightening impulse withstand (kV) imp
rated normal current
busbar (A)
functional units (A)
short time withstand current (kA/3 sec)
12
24
28
75
50
125
1250
2500 (1)
630
1250
2000
1250
2500 (1)
630
1250
2000
16
25
16
25
16
25
25
0,015
16
25
25
0,015
IP65
IP3X
IP2XC
IP65
IP3X
IP2XC
(2) (3)
short circuit breaking current (kA)
internal arc withstand (kA/1 sec)
SF6 gas pressure at 20° C (Mpa) relative
standard degrees of protection (4)
SF6 filled compartment
enclosure
internal partitions
Normal operating conditions, according to IEC 60694 for indoor switchgear (5)
b Ambient air temperature:
v less than or equal to 40 °C,
v less than or equal to 35 °C on average over a 24-hour period,
v greater than or equal to -5 °C.
(1) bus-section unit 2000A
(2) the short-circuit making current is equal to 2.5 times the short time current.
(3) short time withstand current for any application with earthing switch (AD1-ES and TT1ES) is up to 1 sec.
(4) standard degree of protection, for other values, please consult us.
(5) for different conditions, please consult us.
Standards
GMset range meets the following international standards:
b IEC 60694: common specifications to high voltage switchgear and controlgear
b IEC 60298: A.C. metal-enclosed switchgear and controlgear for rated voltages
above 1kV and up to and including 52kV
b IEC 62271-100 (60056): high voltage alternating current circuit breakers
b IEC 62271-102 (60129) : alternating current disconnectors and earthing switches
5
Schneider Electric
GMset
Functional units
General features
GMset switchgear is made up of interconnected functional units.
Each functional unit contains all the elements needed to perform its function:
b a gas-insulated, metalclad cubicle, for indoor use,
b a circuit breaker using SF6 as a breaking medium, sealed for life,
b a digital protection and control system.
Power connections are made between functional units by a busbar set located inside
a SF6 compartment. Steady electrical continuity of all metal frames is ensured by
connection of each functional unit’s earthing busbar to the switchgear’s main
earthing circuit.
Low voltage wiring ducts are provided in the switchgear, above the low voltage
compartments.
Cubicle
The cubicle is a set of earthed, metal-enclosed, gas insulated switchgear that
complies with the requirements of the IEC 60298 standard.
The cubicle comprises four independent compartments, in accordance with the
definition of “metalclad” switchgear given in the standard.
The busbar compartment, using SF6 as an insulating medium, is situated in the top
of the unit and it contains:
b main busbars,
b three-position disconnector.
The circuit breaker compartment, using SF6 as the medium, is located in the
central part of the cubicle, linked to the top part part with the busbar compartment by
means of a bushing insulator. It contains:
b disconnectable circuit breaker,
b connections
The MV connections compartment is situated in the bottom of the cubicle and it
contains:
b MV cable bushing connectors,
b current transformers,
b voltage transformers.
The Low Voltage compartment, separated from the medium voltage section, is
located in the top of the unit and it contains the low voltage auxiliaries and the
monitoring unit.
General arrangement
Five basic cubicle layouts are offered:
b incoming or outgoing feeder
b incoming or outgoing feeder with separated earthing switch
b bus section
b the busbar metering with disconnector
b busbar metering and earthing
AD1/AD2
AD1-ES
CL1/CL2
TT1
TT1-ES
Disconnectable circuit breaker
GMset units use the following circuit breakers:
b SF1-P up to 1250A - 24kV - 25kA
b SF1-G up to 2000A - 24kV - 25kA
The circuit breakers are designed in accordance with IEC 62271-100 standard and
they comply with the definition of «pressure sealed systems» given in IEC 60298
standard, appendix GG.
They are “puffer” type and use SF6 gas as a breaking and isolating medium. The
circuit breakers are maintenance free for life. In case of necessity they can be
replaced in short time because the main connections are made by sliding contacts.
Protection and control system
It includes:
b Sepam protection and monitoring unit
b current transformers
b voltage transformers
Schneider Electric
6
AD1/AD2 type functional unit (incomer and feeder)
auxiliary cableway
low voltage compartment
sepam
1
7
2
disconnector operating mechanism
earthing switch operating mechanism
3
8
instruction plates
4
9
5
cable compartment
6
1 - SF6 busbar compartment
2 - three position disconnector
3 - SF6 circuit breaker compartment
4 - current transformers
5 - cable compartment
6 - voltage transformers
7 - low voltage compartment
8 - SF6 circuit breaker
9 - MV plug-in connectors
A
B
C
D
E
F
A
B
C
L
G
L
G
M
H
I
J
M
H
I
J
N
N
K
K
A. disconnector on/off
position
B. on/off actuating shaft
C. disconnector operating
device
D. on/off earth actuating shaft
E. earthing switch operating
device
F. earthing switch on/off
position indicator
G. voltage indicator
H. CB closing push-button
I. CB opening push-button
J. CB operations counter
K. CB compartment SF6
pressure gauge
L. CB spring condition
indicator
M. CB manual spring
charging device
N. CB position indicator
D
E
F
AD1/AD2 unit
7
AD1-ES unit
Schneider Electric
Functional units
Choice
GMset
The GMset range is composed of 9 functional units. The chart below may be used to
link up needs and functional units, and it gives information on the general
composition of each unit.
How to select: if the user wishes to supply power to a transformer, the solution
is a Transformer Feeder.
The matching functional unit is therefore a TF, comprising an AD1 cubicle equipped
with a disconnector switch, circuit breaker and a type T Sepam.
function
incomer
device
line
disconnector
circuit breaker
transformer
disconnector
circuit breaker
line
disconnector
circuit breaker
feeder
transformer
disconnector
circuit breaker
capacitor
disconnector
circuit breaker
functional unit
cubicle
LI
AD1-AD2
TI
AD1-AD2
LF
AD1-AD2
TF
AD1-AD2
CF
AD1-AD2
protection and control unit
main options
Sepam S
Sepam T
Sepam S
Sepam T
Sepam C
earthing switch with making capacity (available up to 24kV- 12kA- 25kA x 1sec. on AD1-ES units)
current / voltage transformers
surge/lighting arresters
surge/lighting arresters
key locks
Sepam
Incomer
LI, TI with AD1/AD2
Schneider Electric
Sepam
Feeder
LF, TF, CF with AD1/AD2
Sepam
Feeder
LF, TF, CF with AD1-ES
8
function
bus sectionalizing
bus metering
device
switchboard
disconnector
circuit breaker
sectionalizing
disconnector
busbar earthing
disconnector
earthing switch
functional unit
cubicle
BS
CL1-CL2
BB-S
TT1
BB-ES
TT1-ES
protection and control unit
main options
Sepam B
Sepam B
Sepam B
current transformers
voltage transformer
surge/lighting arresters
key locks
Sepam
Switchboard bus section
BS with CL1/CL2
9
Sepam
Busbar metering
BB-S with TT1
Busbar metering
BB with TT1-ES
Schneider Electric
GMset
Functional units
Description
Functional unit/cubicle corresponding chart
The chart below summarizes the electrical characteristics of each of the GMset
functional units.
The type of cubicle used for the function varies according to the characteristics. The
name of the cubicle (AD1, CL2,...) is the name which appears on the GMset test
certificates.
How to read the chart:
to create a “line incomer” function, an LI functional unit is chosen.
The incomer characteristics are:
b Un = 24kV,
b Isc = 25kA,
b In = 2000A.
The cubicle used for this function is an AD2.
function
12 / 24 kV
incomer / feeder (1)
AD and RD
kA
25
16
AD1
RD1 (1)
AD1-ES
630
AD2
1250
2000
A
bus section
CL
kA
25
16
CL2
CL1
1250
2000
A
2000
A*
2000
A*
busbar voltage metering with sectionalizing VT
TT1
kA
25
16
TT1
1250
busbar voltage metering with earthing switch
TT1-ES
kA
25
16
TT1-ES
1250
A* busbar current
Direct incomer (unit without circuit breaker, equipped with
fixed bus-bar bridge) is available with RD1 name
(1)
Schneider Electric
10
Front views
Side views
AD1
AD1-ES
AD1
AD1-ES
AD2
RD1(1)
Dimensions (mm) and approximate weights (kg) by type of cubicle
AD1
AD2
RD1
AD1-ES
width (mm)
height (mm)
depth* (mm)
weight (kg)
500
500
1000
2390
1110
1000
500
420
(*) Back to wall:1100mm; free standing 1150mm
(1) Direct incomer (unit without circuit breaker, equipped with
fixed bus-bar bridge) is available with RD1 name
11
Schneider Electric
Front views
Side views
CL1
CL2
Dimensions (mm) and approximate weights (kg) by type of cubicle
CL1
CL2
width (mm)
height (mm)
depth* (mm)
weight (kg)
1000
1500
2390
1100
700
1400
(*) Back to wall:1100mm; free standing 1150mm
Schneider Electric
12
Front views
Side views
TT1
TT1-ES
Dimensions (mm) and approximate weights (kg) by type of cubicle
TT1
TT1-ES
width (mm)
height (mm)
depth* (mm)
weight (kg)
500
500
2390
1100
350
400
(*) Back to wall:1100mm; free standing 1150mm
13
Schneider Electric
Protection monitoring and control
Switchboard monitoring and control
GMset
GMset supervision system
GMset can be provided with a user’s customized supervision system designed to
control and monitor GMset switchboards.
The use of a supervision system is a key factor in the improvement of the quality of
service:
b efficiency in daily use and operations thanks to a user friendly user interface,
b continuity of service by fast intervention provided by remote control of the GMset,
b understanding and analysis of events and loads.
User-friendly and dependable operator interface
The operator interface of a GMset supervision system is designed to be used
by electricians.
The ergonomics is intuitive, making the system easy to understand and use.
Architecture
The user terminal consists of a compatible personal computer.
It is directly connected to the Sepam protection units via a standard communication
bus.
The control station can easily be connected to a higher level monitoring and control
system.
Basic functions
The main functions are:
b installation display by chained mimic diagrams (animated single line diagram,
device position, energized parts, current faults…),
b real time access to Sepam protection unit measurements (display of
measurements, remote control, protection curve and settings…),
b alarm management (tracking, diagnosis...),
b data analysis (measurements, monitoring curves, data logging...)
b power consumption analysis.
I on
A
V/Hz
W/ϕ
Wh
O off
clear
alarm
trip
I on
reset
A
MERLIN GERIN
I on
A
V/Hz
W/ϕ
Wh
O off
clear
alarm
MERLIN GERIN
Schneider Electric
W/ϕ
Wh
O off
clear
alarm
trip
reset
MERLIN GERIN
trip
reset
V/Hz
I on
A
V/Hz
W/ϕ
Wh
O off
clear
alarm
trip
reset
MERLIN GERIN
I on
A
V/Hz
W/ϕ
Wh
O off
clear
alarm
trip
reset
MERLIN GERIN
I on
A
V/Hz
W/ϕ
Wh
O off
clear
alarm
trip
reset
MERLIN GERIN
14
Protection and control solution
sepam
Each GMset functional unit is equipped with a protection and control solution suitable
for the function to be performed.
The solution comprises :
b a Sepam Protection and Control unit(1) suited to the needs,
b toroidal current transformers,
b voltage transformers,
b low voltage auxiliaries: test blocks, auxiliary contacts, terminal blocks ...
b low voltage outlets for connection to the switching device.
(1) or any other combination of relays, automation devices, measurements and metering
apparatus.
GMset switchboard: protection monitoring and control unit
current
transformer
voltage
transformer
Sepam is a range of digital monitoring protection and control units.
Sepam is at the centre of protection, monitoring and control system for GMset
functional units: all the necessary protection, metering, control, monitoring and
signalling functions are carried out by Sepam.
Sepam has a range of units defined to provide an optimal solution for a each
application, and includes:
b Sepam S, sub-station incomer and feeder
b Sepam B, bus sectioning
b Sepam T, transformer feeder
b Sepam M, motor feeder
b Sepam C, capacitor feeder
b Sepam G, generator feeder
The Sepam range hinges around 2 functional and hardware bases:
b Sepam 2000, focused on performance, covers all GMset functional applications
b Sepam 1000+, simple and modular, offers an optimezed solution for most common
applications.
Sepam advantages
Sepam, a digital multi-functional protection unit, provides you with the following
advantages:
b simple to use for better dayly efficiency: use-machine interface (UMI) which is
ergonomic and which provides comprehensive and clear information to operators
b simple to incorporate: flexibility and user friendliness of parameter setting
software, simplified tests
b money saving:
v integrating all functions required in one single, ready to use product
v upgradable solution, to spread the cost of investment over time
b centralized GMset switchboard management:
v Sepam is easily integrated into all network control systems, due to its Modbus
communication interface
v all data required for installation monitoring and control are accessible through the
Modbus communication
b better network knowledge through the oscillo-disturbance recording function and
measurement of the imbalance ratio, motor operation parameters, etc.:
b improving continuity of service
v through effective preventive equipment maintenance using switchgear diagnosis
functions: time and number of operations, sum of breaking currents A2, etc.
v through clear and comprehensive information, both locally and remotely, reducing
the time needed to act in the event of a fault.
15
Schneider Electric
GMset
Protection monitoring and control
Functional unit protection
Sepam 2000, for all applications
The Sepam 2000 range of digital protection, monitoring and control units provides a
comprehensive solution for all applications:
sub-station, busbar, transformer and motor, as well as generators and capacitors.
Different types of Sepam 2000 are proposed for each type of equipment to be
protected. For example, there are 30 different types of Sepam 2000 dedicated
to protection, monitoring and control of transformers.
Each Sepam 2000 is an optimized solution, designed to provide an exact response
to the actual requirements of a functional application, including all the required
functions ready to use.
Focused on performance, Sepam 2000 includes the following functions:
bmetering functions: measurement of current and voltage, measurement of power
and active and reactive energy, etc.
b protection functions: directional phase and earthing protection, differential
transformer or machine protection, etc.
b monitoring and control functions: in its function as a programmable logical
controller, Sepam 2000 is pre-programmed to carry out standard monitoring and
control functions, and can be re programmed to handle any specific automatic control
function!
Sepam 1000+ series 20
Suitable for common applications, Sepam series 20 offers simple solutions
based on current or voltage metering.
b protection of substation incomers and feeders against phase-to-phase and
phase-to-earth short circuits with 16 IDTM tripping curves and adjustable timer hold
to detect recurrent faults
b protection of overhead lines with built-in recloser function
b protection of transformers against overloads, with ambient temperaturecompensated RMS thermal overload protection with 2 groups of settings for different
ventilation operating rates
b protection of motors against internal faults and overloads with ambient
temperature-compensated RMS thermal overload protection.
The Sepam series 20 B21 and B22 voltage units are suitable for monitoring of
network voltage - frequency and loss of mains detection by rate of change of
frequency protection for installations with local power generation.
Sepam 1000+ series 40
Sepam series 40, with its current and voltage metering capabilities, offers highperforming solutions for more demanding applications.
Sepam series 40 units perform the following functions in addiction to those
performed by Sepam series 20
b protection of closed ring networks or networks with parallel incomers, by
directional protection
b directional earth fault protection suitable for all earthing systems: impedant,
isolated or compensated neutral
b protection of networks with variable configurations requiring the switching of
groups of settings and logic discrimination
b all the necessary electrical measurements: phase and residual currents, phase-toneutral, phase-to-phase and residual voltage, frequency, power and energy, ...
b comprehensive network diagnosis assistance: 20 seconds of disturbance recording, detailed history of the last 200 alarms, storage of the last 5 tripping contexts
b adaptation of control functions by a logical equation editor
b customization of alarm messages to fit each application, and/or in the user’s
language
Sepam 1000+ selection guide
selection criteria
Series 20
Measurements
Specific protection
functions available
I
Applications
Type
U
Series 40
U
I and U I and U
Loss of
Directional
mains
earth fault
(ROCOF)
I and U
Directional earth
fault and phase
overcurrent
Substation
S20
S40
S41
S42
Transformer
T20
T40
T42
Motor
M20
M41
Generator
G40
Busbar
B21
B22
Example: For motor protection and current-voltage measurements, your solution is M41 type
For detailed information, see catalogues (Sepam Encyclopædia on CD ROM).
Schneider Electric
16
Protection monitoring and control
Current and voltage transformers
and live line testing
GMset
In the protection system, the functional units are fitted with transformers designed to
supply the measurements and/or protection circuits:
b current transformers,
b voltage transformers,
v CSH core balance current transformers.
The live parts are totally encapsulated in an integral epoxy resin molding
which serves a dual function:
b it ensures electrical insulation,
b it guarantees excellent mechanical resistance of the assembly.
Current transformers
AD1 and AD2 units
ARF / ARL type toroidal-core current transformers are located around the switchgear
bushings. The toroidal core accommodates the secondary windings, the switchgear
bushing is the primary winding.
The transformers have primary current values from 50A to 1250A and secondary
current 1A or 5A.
ARF type
ARJA1 type
CL1 and CL2 units
ARJA1 type conventional current transformers, located in the bus-section unit.
The transformers have primary current values from 500A to 2500A and secondary
current 1A or 5A.
Schneider has a standardized list of CTs that are appropriate for use with digital
protections to simplify the determination of accuracy characteristics.
This list is available on request.
Voltage transformer
VRT4 type metal shielded voltage transformers, located in the cable compartment.
They have one insulated MV end with plug-in connector, for connection between
earth and phase conductors in 3-phase systems.
The cores and windings are overcast in epoxy resin, providing electrical insulation.
The external surface is metal shielded.
VRT4 type
CSH core balance current transformers
The CSH core balance current transformers, designed by Schneider, provide more
sensitive protection by direct measurement of earth fault current.
They will be housed in the cable trench at the bottom of the unit.
They can be connected to either of Sepam current inputs: 2A or 30A.
CSH type
VPIS (Voltage Presence Indicator System)
Standard
This indicator is in conformity with the standards specifically dealing with VPIS: IEC
61958.
Rationalisation
Since it is designed for all MV products ranges this new VPIS will be used for other
products such as SM6, RM6, etc.
Its new design integrates better with the earthing switch unit as a whole.
The indicator lights are incorporated in the unit in this new version.
17
Schneider Electric
Apparatus
SF1-G and SF1-P circuit breakers
GMset
SF1-G and SF1-P circuit breakers
b The SF1-G and SF1-P circuit breakers are “puffer“ type and use SF6 gas as a
breaking and insulating medium.
They are composed of three poles mounted on a base which supports
the operating mechanism.
According to IEC 60298 App. GG (1987), the circuit breaker is defined as a sealed
pressure system, that is an assembly for which no further gas processing is required
during its expected operating life.
b The fundamental feature of the circuit breaker- essential for the very concept of a
fully gas insulated switchgear- is its very high dependability which means:
v high reliability,
v long mechanical life: the circuit breakers are tested for 10,000 (class M2)
mechanical operations with no need to replace parts with only ordinary maintenance
of the operating mechanism,
v long electrical life: the capacity of breaking load and short circuit current is much
higher than it is normally required in 30 years of operational life. The circuit breakers
comply for the electrical endurance life whit IEC 62271-100 (class E2) standard.
v no need for any maintenance on the active parts,
v manufactured under a fully quality assurance program.
Puffer type: operating principle
The main contacts and arcing contacts are initially closed (fig 1).
Precompression (fig 2)
When the contacts begin to open, the piston slightly compresses the SF6 gas
in the pressure chamber.
fig.1
fig.2
Arcing period (fig 3)
The arc strikes between the arcing contacts. The piston continues its downward
movement.
A small quantity of gas, directed by the insulating nozzle, is injected across the arc.
For the breaking of low currents, the arc is cooled by forced convection.
However, for high currents, thermal expansion causes the hot gases to move toward
the colder parts of the pole unit.
The distance between the two arcing contacts becomes sufficient for the current
to be broken when it reaches the zero point, due to the dielectric properties of SF6.
Sweeping overstroke (fig 4)
The moving parts finish their movement and the injection of cold gas continues until
the contacts are completely open.
fig.3
Schneider Electric
fig.4
18
Characteristics of circuit breakers in GMset GIS
electrical characteristics
kV, 50/60Hz
rated voltage
kV, rms 50Hz - 1 mn
insulation level
rated normal current
short circuit breaking
current
short circuit current
short-time withstand
current
capacitor breaking
current
rated operating
sequence
approximate operating
time
SF1-G
SF1-P
12
24
12
24
28
75
50
125
28
75
b
b
50
125
b
b
b
25
b
25
25
25
kA, peak
63
63
63
63
kA, rms 3s
25
25
25
25
A
875
875
440
440
b
b
35-50
35-65
50-70
b
b
35-50
35-65
50-70
b
b
b
35-50
35-65
50-70
b
b
b
35-50
35-65
50-70
kV, 1,2/50 µs impulse
A
630
1250
2000
kA, rms
O-0,3s-CO-15s-CO
O-0,3s-CO-30s-CO
O-0,3s-CO-3m-CO
ms
opening
breaking
closing
Main switching features
b low overvoltages when breaking small inductive currents
b suitable for rapid autoreclosing duty
b suitable for switching capacitor banks
Standards
The indicated features are referred to the following standards and specifications:
IEC 62271-100, 60056 and 60694 International Standards
Operating time definition
b opening time: interval of time between the instant of energizing the opening
release and the instant when the arcing contacts have separated in all poles
b break time: interval of time between the instant of energizing the opening release
and the instant when the arc extinguishes in all poles
b closing time: interval of time between energizing the closing circuit and the instant
when the contacts touch in all poles
Operating sequence
Consult our technical department for other operating sequences.
19
Schneider Electric
Apparatus
GMh and RI operating mechanisms
GMset
Operating mechanisms
GMh and RI operating mechanisms
SF1-G and SF1-P range circuit breakers are actuated respectively by GMh and RI
operating mechanisms that ensure switching device closing and opening speed that
is indipendent of the operator. The operating mechanisms, which are always
motorized, can perform remote control funtions and implement fast reclosing cycles.
The operating mechanisms are located outside the SF6 compartment. Maintenance
is reduced by using self lubrificating parts.
GMh and RI electrical operating mechanisms include:
b a spring system which stores the energy needed to close and open the breaker,
b a manual spring charging system,
b an electrical motor spring charging device that automatically recharges the
mechanism as soon as the contacts close (time ≤ 15 s),
b two mechanical push-buttons on the front panel for opening and closing,
b an electrical closing system including:
v a closing release for remote control and an anti-pumping relay.
b an electrical “opening” release system featuring one or more releases of the
following types:
v shunt,
v undervoltage*
v low power-consuming mitop**,
b operation counter,
b a mechanical “charged-discharged” position indicator of closing springs,
b a closing springs end-of-charging contact (NO or NC),
b a mechanical “open-closed” position indicator,
b a multi-pin connector for isolating auxiliary circuits.
Auxiliary contacts
The GMh and RI operating mechanisms are equipped with auxiliary contacts. The
number of available contacts depends on the composition of the operating
mechanism and the options chosen. However at least three CO contacts are
available on the switchgear outgoing terminal block for the external signals.
rated current
breaking capacity
10A
AC
DC
10A with 220V
(p.f. ≥ 0,3)
1,5A with 11 or 220V
(L/R ≤ 0,01s)
GMh and RI operating mechanisms characteristics
type of auxiliaries
supply
consumption
voltage
spring
charging
motor
AC (V)
50Hz
60Hz
DC (V)
AC (VA)
DC (W)
possible combinations
of auxilaries and quantity
=
or
or
closing
release
48-110-220
120-240
24-48-60-110-125-220
500 (GMh)
100 (GMh)
400 (RI)
100 (RI)
300 (GMh)
70 (GMh)
250 (RI)
70 (RI)
+
+
b 1
b 1
b 1
b 1
b 1
b 1
shunt opening release
single
double
100 (GMh)
100 (RI)
70 (GMh)
70 (RI)
+
200 (GMh)
200 (RI)
140 (GMh)
140 (RI)
+
b 1
b 1
b 1
undervoltage “Mitop”
opening
opening
release
release **
75***
15***
b 1
b 1
b 1
* on request as special solution, please contact us.
** mitop: current-operated release used as an option with the Sepam 100 LA protection relay.
*** hold consumpion
Schneider Electric
20
Apparatus
GMh and RI auxiliary diagrams
GMset
Auxiliary diagram
Sf
S
So
Su
KN
SL
SM
M
Q
SE
KN
Y01
SN
M
YF
YM
M
SN
S
SN
S
SP1
Y02
YD
S
SP2
GMh and RI circuit breaker operating mechanisms
KN
Anti-pumping relay.
M
Closing spring charging motor.
Q
Circuit breaker.
SE
Held tripping contact
SF
Closing push button (outside).
SL
Manual charging operation in progress.
SM
Circuit breaker auxiliary contacts.
SN
Closing springs end-of-charging contacts.
SO
Opening push button for shunt trip release (outside).
SP1
Pressure-switch contact first level.
SP2
Pressure-switch contact second level.
SU
Opening push button for undervoltage release (outside).
YD
“Mitop” opening release (current-operated).
YF
Closing release.
YM
Undervoltage opening release (*).
Y01-Y02 Shunt opening releases.
(*) On request as special solution please contact us
21
Schneider Electric
GMset
Installation
Cable terminations
The switchgear is designed for the use of plug-in terminations according to
DIN 47636, CENELEC EN 50181 Interface “C”.
It is possible to connect up to two cables (1/3-core cable) for each phase with a max.
cable cross section of 630mm2.
In order to simplify the assembly and cable-testing work, the height of the connection
point is more than 700mm.
Type of cable termination (only for reference, not binding)
rated voltage
12kV
24kV
type of M.V. cable manufacturer
termination cable
type
section
one or three cores
PE or XLPE
insulation type
400TB
440TB
ASTS10/630
RICS51
FMCTS-400
K400TB
K440TB
ASTS10/630
RICS51
FMCTS-400
one or three cores
PE or XLPE
insulation type
Euromold
Felten&Guilleaume
Raychem
Pirelli
Euromold
Felten&Guilleaume
Raychem
Pirelli
70-300
185-630
25-300
25-300
25-300
35-300
185-630
25-300
25-300
25-300
Typical configuration of cable connection for unit up to 1250A
1 cable per phase
2 cables per phase
2 cables per phase
+ lightning arresters
(or voltage transformers)
cable test device
1 cable per phase
+ VT connection
Nota : 2000A units suitable for connection up to 4 cables per phase (two bushings in parallel per
phase).
Schneider Electric
22
Installation
Example of lay-out
GMset
Line-up switchgear
(two incoming cubicles and one bushing section 24kV 1250A)
(1
100(1)
1100
0
500(1)
500
500
2 feeders
630 A or 1250 A
500
500
1000
500
incomer
1250 A
with VT
transformer
busbar
bus section 1250 A
transformer
busbar
500
incomer
1250 A
with VT
500
500
500(1)
2 feeders
630 A or 1250 A
5000
Civil engineering with utilities space
(1)
(2)
(3)
100 (1)
room entrance
2600 (1)
2800 (1)
(4)
minimum
in accordance with cable bending radius
distance needed to extract a funcional unit from the switchboard without moving the
other units
distance needed to extract the circuit breaker with special truck
LV cable entrance from the bottom inside CL cubicle or at the end side of switchboard.
1500 (4) - 2000 (3)
see (2)
600
23
Schneider Electric
GMset
Environment
Preserving the environment
The Schneider recycling procedure for SF6
based products is subject to rigorous
management, and allows each device to be
traced through to its final destruction.
The Schneider recycling procedure
Within the framework of the group’s environmental policy, Schneider services
has made an operational procedure available, enabling medium voltage switchgear
to be processed while eliminating any release of SF6 into the atmosphere.
To help you to protect the environment, and to take care of your storage or
dismantling concerns, Schneider services offers to recover any of your equipment
that is reaching the end of its service life.
The GMset has been designed with environmental protection in mind:
b the insulating and conducting materials that are used are identified, easy to
separate, and recyclable,
b SF6 can be recovered at the end of its life, and reused after treatment.
Schneider Electric
24
Postal address
F-38050 Grenoble cedex 9
Tel: +33 (0)4 76 57 60 60
Telex: merge 320842 F
http://www.schneiderelectric.com
As standards, specifications and designs change from time to time, please ask for confirmation of
the information given in this publication.
Rcs Nanterre B 954 503 439
Publishing: Schneider Electric SA.
Production, Illustration: Schneider Electric SA
Print:
ART.88492
This document has been
printed on ecological paper.
09 / 2003
AMTED198016EN /2  2002 Schneider Electric SA All right reserved
Schneider Electric SA