A.21
M-PACT Plus
Accessories
A
B
C
X
Mechanical interlocks can be fi tted to the following electrical
systems and can link 2 or 3 circuit breakers of any rating or
number of poles, fi xed or withdrawable.
Typical circuit
Interlock confi guration
Possible combinations
Type A
Interlocking between 2 circuit breakers
B1 normal power supply
B2 generator (emergency) supply
B1
B2
0
0
I
0
0
I
Circuit breaker B1 can only close if B2 is open
Circuit breaker B2 can only close if B1 is open
Type B
Interlocking between 3 circuit breakers
3 power supplies (generator or
transformers) feeding the same
busbar but parallel operation is prevented.
Available upon request.
B1
B2
B3
0
0
0
I
0
0
0
I
0
0
0
I
Only 1 from 3 breakers can be closed
Type C
Interlocking between 3 circuit breakers
2 bus sections can be powered by a
single transformer (bus coupler
closed) or by both transformers
(bus coupler open).
Available upon request.
B1
B2
B3
0
0
0
I
0
0
0
I
0
0
0
I
I
0
I
0
I
I
I
I
0
Any 2 from 3 circuit breakers can be closed
Any 1 from 3 circuit breakers can be closed
Interlocks
Summary of Contents for M-Pact Plus
Page 2: ......
Page 4: ...A 2 M PACT Plus A B C X M PACT Plus M PACT Plus Air Circuit Breaker 400 4000A...
Page 26: ...A 24 M PACT Plus A B C X Notes...
Page 28: ...B 2 Order codes A B C X M PACT Plus Notes...
Page 68: ...M PACT Plus A B C X Notes...
Page 75: ......