MV Switch Disconnectors
NAL/F and AM
ABB PTMV Poland
2003
ABB PTMV Division
Factory in Przasnysz
BU 3420 - MV fuses / MV Switch Disconnectors
SWITCH DISCONNECTORS
Indoor
AIRSWITCH series
BWMW
ABB PTMV Poland
NAL/F
CEF
Rotary type:
AM
BU 3420 - Switch Disconnector
type NAL/F
Type NAL / F - INDOOR




Based on modular principle
Simply and reliable design,
A lot of additional equipment,
Wide range of application with easy installation and
maintenance.
ABB PTMV Poland
Rated voltage [kV]
12
17.5
24
36
Pole distance [mm] 150 210 170 170 235 270 360
Rated current
[A]
400 - 630 - 1250
630 800
Mechanisms
K
KS
A
ABB PTMV Poland
BU 3420 - Switch Disconnector
12, 17,5 i 24 kV / 400, 630 i 1250 A
type NAL/F
36 kV / 630 i 800 A
BU 3420 - Switch Disconnector
•
3-pole switch disconnector
and switch fuse combination
•
IEC 265-1 (actual: IEC 60 265-1) - 100
close / open operations at 630 A
•
•
ABB PTMV Poland
type NAL/F
Class E1 24kV
Class E3 12/17,5/36 kV
•
IEC 420 (actual: IEC 62271-105)
Alternating current switch-fuse
combinations
•
More than 500 000 units in service
world wide
•
Production capacity of 25 000 units
per annum
ABB PTMV Poland
BU 3420 - Switch Disconnector
type NAL/F
ABB PTMV Poland
BU 3420 - NAL Switches – main types of switches
ABB PTMV Poland
BU 3420 - NAL Switches – main types of switches
BU 3420 - Switch Disconnector
Auxiliary switch
2;4;8NO+NC
Motor operation
on switch mounted
Shaft extension for
Left-Hand side operation
type NAL/F
Operating mechanism
Hand operating type HE
(upper part)
- bevel gear
Operating handle
Auxiliary switch for installation
Of fuse interruption
Mechanical interlocking
Shunt trip coil for
A-mechanism
ABB PTMV Poland
Hand operating type HE
(lower part)
-Front bearing
Earthing switch type E
Motor operation mounted
in front
ABB PTMV Poland
BU 3420 - Switch Disconnector
Earthing switch type EB
For separate installation
type NAL/F
Quick make earthing switch type E
BU 3420 - Switch Disconnector
type NAL/F
Earthing switches
 Earthing switches with making
capacity
Mounted on pivot side of the
switch or on fuse base
ABB PTMV Poland
Mechanical interlocking
Earthing switch for separate
installation
BU 3420 - Switch Disconnector
type NAL/F
UEMC 40 K3
ABB PTMV Poland
NM 24…220
Type UEMC 40 K3 /NM
mounted on the mechanism
Type UEMC 40 A2
mounted on the front panel
BU 3420 - Switch Disconnector
1
2
3
1. Latched snap action - type KS
2. Stored spring energy – type A
ABB PTMV Poland
With two springs
3. Snap action -type K
With one spring
type NAL/F
BU 3420 - Switch Disconnector
type NAL/F
Hand operating mechanism type HE:
• Bevel gear
• Connection rod
• Front bearing with cardanic jointoptional blocking coil
• Operating handle
• Shaft extension
- Left – hand side operation
ABB PTMV Poland
- Mechanical interlocking
BU 3420 - Switch Disconnector
ABB PTMV Poland
Mounting example for hand operating mechanism
90 - Transmission with HE
type NAL/F
BU 3420 - Switch Disconnector
type NAL/F
Applications
• Cable sectionalizer and
transformer switch
• Motor switch (with motor fuse
CMF)
• Switching of capacitor banks
• Component for local
manufactured panels
• Used in switch cubicles
ABB PTMV Poland
• Compact substation (kiosk)
• Utility and industrial
application
BU 3420 - Switch Disconnector
type NAL/F
ABB PTMV Poland
Application example
BU 3420 - Switch Disconnector
type NAL/F
ABB PTMV Poland
Applications
NAL in substation
NAL in UniSafe and UniGear cubicle
BU 3420 - Switch Disconnector
type NAL/F
ABB PTMV Poland
Open switch
BU 3420 - Switch Disconnector
type NAL/F
Connecting of the
switch
ABB PTMV Poland
• Connecting main knife
BU 3420 - Switch Disconnector
type NAL/F
ABB PTMV Poland
Connected switch
BU 3420 - Switch Disconnector
type NAL/F
Switching off
ABB PTMV Poland
• flame arc breaking
ABB PTMV Poland
BU 3420 - Switch Disconnector
type NAL/F
ABB PTMV Poland
BU 3420 - Switch Disconnector
type NAL/F
BU 3420 – AirSwitch series
The switchboard ROTARY switches and isolators


AM
AR/AS
ABB PTMV Poland
Available in two versions:

AM type switch disconnector
(24kV; 400/630A)

AR/AS type rotary isolators
(24kV; 400/630/ 800/1250A)
BU 3420 - Switch Disconnector
Switch Disconnector AM
ABB PTMV Poland
 Air-insulated

Rotary type

630 A breaking capacity

40 kA making capacity

2 positions: LINE – OPEN

Provide segregation between busbar and feeder compartments

Interlocked with a separate eathing switch
type AM
BU 3420 - Switch Disconnector
type AM
Switch Disconnector AM
Voltage signalling
device
Key lock
Auxliary
contacts
ABB PTMV Poland
Door lock
Shunt
opening
release
BU 3420 - Isolators
Switch Isolator AS/AR
ABB PTMV Poland
 Air-insulated

Rotary type

400, 630, 800, 1250 A rated current

up to 25 kA short time withstand current
type AR/AS
BU 3420 - Isolators
type AR/AS
Isolators AR/AS
Voltage signalling
device
Key lock
Auxliary
contacts
ABB PTMV Poland
Door lock
BU 3420 - Switch Disconnector
ABB PTMV Poland
Switch disconnector applications
type AM
BU 3420 - Switch Disconnector
Switch disconnector
with fuses
type AM
1
2
3
ABB PTMV Poland
5
Caption:
4
1 Busbars
2 Switch Disconnector
3 Fuses
4 Earthing switch
5 Cable fixing point
BU 3420 – Isolators
ABB PTMV Poland
Isolators applications
type AR/AS
ABB PTMV Poland
BU 3420
BU 3420 – Switches
ASIA:
ABB PTMV Poland
EUROPE: WE+CEE
AUSTRALIA
CHINA
HONG KONG
INDIA
INDONESIA
JAPAN
KOREA
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PAKISTAN
PHILIPPINES
SINGAPORE
TAIWAN
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CROATIA
CZECH REP.
DENMARK
ESTONIA
FINLAND
GERMANY
GREAT BRITAIN
GREECE
HUNGARY
ICELAND
SOUTH&NORTH AMERICA:
IRELAND
ARGENTINA
ITALY
BOLIVIA
LATVIA
BRAZIL
LITHUANIA
CANADA
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CHILE
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COLOMBIA
POLAND
ECUADOR
PORTUGAL
MEXICO
ROMANIA
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PERU
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USA
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SWITZERLAND
MIDDLE EAST:
ARAB EMIRATES
EGYPT
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TURKEY
AFRICA:
SENEGAL
SOUTH AFRICA
TANZANIA
BU 3420 - Switch Disconnector
•
type NAL/F
Modern machinery
• ISO 9001/14001 certified
ABB PTMV Poland
• IEC; ANSI, CSA, GOST Standards
ABB PTMV Poland
BU 3420
BU 3420 – switch disconnectors – normal operating conditions
ABB PTMV Poland
•Maximum ambient temperature +400C
•Minimum ambient temperature is -250C
•The altitude does not exceed 1000m (3300ft)
•The ambient air is not excessively polluted by dust, smoke,
corrosive or flammable gases, vapour or salt
•Typical conditions of humidity for indoor installations are
fulfilled
BU 3420 - switch disconnectors – Standards
ABB PTMV Poland
•IEC 60265 Switches for voltage above 1 kV and less than 52 kV
•IEC 60694 Common specification for high-voltage switchgear
and controlgear standards
•IEC 60129 Alternating current disconnectors and earthing
switches
•IEC 62271-105 High voltage switchgear and controlgear
•Part 105-Alternating current switch-fuse combinations
•former name IEC 420
BU 3420 - switch disconnectors – application
Altitude correction factors for Test and Rating Voltages
ABB PTMV Poland
Altitude correction factors for Rated Current and Temperature Rise
BU 3420 - switch disconnectors – Switch-fuse ratings
ABB PTMV Poland
Switch nameplate
ABB PTMV Poland
BU 3420 - switch disconnectors – breaking capacity
ABB PTMV Poland
BU 3420 - switch disconnectors – breaking capacity
ABB PTMV Poland
BU 3420 - switch disconnectors – breaking capacity
ABB PTMV Poland
BU 3420 - switch disconnectors – breaking capacity
ABB PTMV Poland
BU 3420 - switch disconnectors – breaking capacity
ABB PTMV Poland
BU 3420 - switch disconnectors – breaking capacity
BU 3420 - HV fuses – Coordination with load break switch
ABB PTMV Poland
Minimum breaking current with switch disconnector coordination
BU 3420 - switch disconnectors – Operating methods
ABB PTMV Poland
When using NALF - A or KS operating
mechanism are suitable only
ABB PTMV Poland
BU 3420 - switch disconnectors – Operating methods
BU 3420 - switch disconnectors – Coordination with switch
ABB PTMV Poland
Transfer current (striker operation)
value of the three-phase symmetrical current at which the fuses and
the switch exchange breaking duties
NOTE Above this value the three-phase current is interrupted by the
fuse only. Immediately below this value, the current in the first-pole-toclear is interrupted by the fuse and the current in the other two poles by
the switch, or by the fuses, depending on the tolerances of the fuse
time current characteristic and the fuse-initiated opening time of the
switch.
ABB PTMV Poland
BU 3420 - HV fuses – Coordination with load break switch
BU 3420 - HV fuses – Coordination with load break switch
ABB PTMV Poland
The fuses are incorporated in order to extend the short-circuit
breaking rating of the combination beyond that of the switch alone.
They are fitted with strikers in order both to open automatically all
three poles of the switch on the operation of a fuse and to achieve a
correct operation at values of fault current above the minimum
melting current but below the minimum breaking current of the fuses
The minimum breaking current is normally in the range from 2 to 7
times fuse rated current (dependent of fuse rated current). Naturally
the question is what will happen if we get a fault current in the range
from minimum melting to minimum breaking current?
If this happen, when the last conductor melts off, an arc starts and
we get an arc voltage between the fuse terminals as described
earlier. The fuse will withstand the arc and the energy dissipated for
200 to 400 ms. Due to the arc voltage the striker system will operate
and combined with a load break switch, tripping on signal from the
striker, the load break switch will open and interrupt the current
before the fuse is damaged.
BU 3420 - HV fuses – Coordination with load break switch
ABB PTMV Poland
That means in the range from minimum melting current to minimum breaking current
the fuse gives the signal and the breaker clears the fault. In this way by combining a
load break switch with a pre charged operated mechanism which can be tripped by
the fuse striker system, we can obtain protection from minimum melting current and
up to the max breaking current for the fuse.
When we reach a certain fault current level the fuse will break and clear the fault
before the breaker is able to open due to the mechanical operating time of the switch
(this is normally 40 -70 ms dependent of type) and we do not get any problem with
the breaking capacity of the load break switch, the fuse has already cleared the fault
when the breaker opens. We will have a certain range where fuse and switch have
approximately same clearing time. This happen at the take over current as shown on
earlier slide.
The switch itself must have a max. breaking capacity which overlaps the take over
point. The requirement to a fuse switch combination is given in IEC 62271-105
(former IEC 420). and will determine what max. rated current the fuse can have to be
sure you have the necessary safety margin for coordination between fuse and switch.
BU 3420 - switch disconnectors – general rules
ABB PTMV Poland
Low over-currents
BU 3420 - switch disconnectors – general rules
ABB PTMV Poland
Minimum breaking current
ABB PTMV Poland
BU 3420 - HV fuses – general rules
ABB PTMV Poland
BU 3420 - HV fuses – Coordination with load break switch
ABB PTMV Poland
BU 3420 - HV fuses – Coordination with load break switch
ABB PTMV Poland
BU 3420 - HV fuses – Coordination with load break switch
ABB PTMV Poland
BU 3420 - HV fuses – Coordination with load break switch
ABB PTMV Poland
BU 3420 - HV fuses – Coordination with load break switch
ABB PTMV Poland
BU 3420 - NAL Switches – Tightening forces
ABB PTMV Poland
BU 3420 - NAL Switches – Assembling mistakes
ABB PTMV Poland
BU 3420 - NAL Switches – Assembling mistakes
ABB PTMV Poland
BU 3420 - NAL Switches – Assembling mistakes
ABB PTMV Poland
BU 3420 - NAL Switches –
Your questions?
ABB
PTMVPoland
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