Interlock Application Scheme # 35A - Breakers and Generators

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Interlock Application - Breakers and Generators

Scheme # 35A
To prevent closing the generator breaker when the main breaker is closed.

Interlock Application Scheme # 35 - Breakers and Generators

Breaker A is closed to supply load M. Key A-1 is held in the L-O interlock on breaker A. Generator breaker G is locked open and cannot be closed until breaker A is locked open.

To transfer load M to the generator, proceed as follows:

1.
2.

3.

4.

Open breaker A.
Turn key A-1 in L-O interlock on breaker A to lock open. Key A-1 is now free.
Insert key A-1 in L-O interlock on breaker G and turn to unlock. Key A-1 is now held.
Close breaker G.

Reverse sequence to restore service through breaker A.

Links for more interlock application scheme information:

Contents | Introduction | Symbols Legend | Scheme Book

Scheme # 1
Scheme # 2
Scheme # 3
Scheme # 4
Scheme # 5
Scheme # 6
Scheme # 7
Scheme # 8
Scheme # 9
Scheme # 10
Scheme # 10A
Scheme # 11 Scheme # 12

Scheme # 13
Scheme # 14
Scheme # 15
Scheme # 16
Scheme # 17
Scheme # 17A Scheme # 18
Scheme # 19
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Scheme # 21
Scheme # 22 Scheme # 23
Scheme # 24

Scheme # 25
Scheme # 26
Scheme # 27 Scheme # 28
Scheme # 29
Scheme # 30
Scheme # 31
Scheme # 32
Scheme # 33 Scheme # 34
Scheme # 35
Scheme # 35A
Scheme # 36

Scheme # 37
Scheme # 38 Scheme # 39
Scheme # 40
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Scheme # 42A
Scheme # 42B
Scheme # 43
Scheme # 43A
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Scheme # 45
Scheme # 45A