Mechanical Interlocks - ABB SACE Emax 2 Series Operating Instructions Manual

3 - Mechanical Interlocks

Mechanical interlock of type A
- Two Circuit-breakers
Mechanical interlock of type B
- Three Circuit-breakers
1 2 3
O
I
O
I
O
Mechanical interlock of type C
- Three Circuit-breakers
1 2 3
O
I
O
O
O
I
I
Mechanical interlock of type D
- Three Circuit-breakers
1 2 3
O
I
O
O
Operating coil trip time
setting on interlocked circuit-
breakers
190 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
Mechanical interlocks determine the opening/closing logic between two or three circuit-breakers.
Four types of interlocks are available, usable in both fixed and withdrawable versions.
The Type A interlock is applicable to two circuit-breakers (normal power supply + emergency power
supply).
It allows you never to have two circuit-breakers in the closed position at the same time.
1 2
Information on assembly is available on the website http://www.abb.com/abblibrary/DownloadCenter/,
O O
in particular with the kit sheets:
I O
1SDH000999r0720
•
O I
1SDH001000r0720
•
• 1SDH000999r0721
breaker
The Type B interlock is applicable to three circuit-breakers (two normal power supplies + emergency
power supply).
It only allows the closing of the two circuit-breakers of the normal power supply if the circuit-breaker of
the emergency power supply is open. The circuit-breaker of the emergency power supply can be closed
O O
only if the others two are open.
O O
Information on the assembly is available on the website http://www.abb.com/abblibrary/
O I
DownloadCenter/, in particular with the kit sheet 1SDH001000r0721.
O I
I O
The Type C interlock is applicable to three circuit-breakers (two normal power supplies + a bus tie).
It allows the simultaneous closing of one or two circuit-breakers, resulting in two possible types of power
supply of the half busbars:
• power supply from a single transformer (bus tie closed)
O O
• power supply from both transformers (bus tie open)
O O
I O
Information on the assembly is available on the website http://www.abb.com/abblibrary/
O I
DownloadCenter/, in particular with the kit sheet 1SDH001000r0722.
I I
I O
O I
The Type C interlock is applicable to three circuit-breakers (three power supplies on the same bar that
must not operate in parallel)
It allows only one of the three circuit-breakers to be closed.
Information on the assembly is available on the website http://www.abb.com/abblibrary/
O O
DownloadCenter/, in particular with the kit sheet 1SDH001000r0723.
O O
I O
O I
Before the trip command of a YC release on the circuit-breaker (B) which activates an interlock, make sure
that at least 60ms have passed since the energizing of release YU or from the de-energizing of release
YO - YO2 on the circuit-breaker to be interlocked (A).
Figure 122
for interlock between E1.2circuit-breakers
for interlock between E2.2-E4.2-E6.2 circuit-breakers
for interlock between one E1.2 circuit-breaker and one E2.2-E4.2-E6.2 circuit-
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Mechanical accessories
3 - Mechanical Interlocks