Kirk Key Interlock Company
INDEX
INTERLOCKS
Brass Interlocks
Hybrid Series Interlocks316 Stainless Steel Interlocks
DOWNLOADS
Data Sheets
DrawingsAPPLICATION INFOCOMMON SCHEMESDUPLICATE KEYSKey Release FormCORPORATEORDERCONTACT

Email Kirk Key:
sales@kirkkey.com

 

 

  

Contents | Introduction | Symbols Legend | Scheme Book

Interlock Application - Rectifier Access

Scheme # 45A
To prevent opening any rectifier enclosure door while the rectifier is operating and to prevent opening the negative disconnect switch under load.

Rectifier with incoming breaker, DC output breaker and negative disconnect switch. Any quantity of rectifier access doors can be accommodated.

Incoming breaker A, DC main breaker B and negative disconnect switch N are normally closed. Key A-1 is held in the L-O interlock on breaker A. Key A-2 is held in the L-O interlock on breaker B. Key N-1 and all D-1 keys are held in the transfer interlock. All rectifier enclosure access doors are locked closed.

 

1.
2.

3.
4.

5.


6.

7.


8.

9.

Open breaker A.
Turn key A-1 in L-O interlock on breaker A to lock the breaker in the open position. Key A-1 is now free.
Open breaker B.
Turn key A-2 in L-O interlock on breaker B to lock the breaker in the open position. Key A-2 is now free.
Insert keys A-1 and A-2 in the transfer interlock and turn. Keys A-1 and A-2 are now held. All D-1 keys and key N-1 are now free.
Insert D-1 keys in the L-C interlocks (Type D) on rectifier access doors.
Open the rectifier access doors to enter the rectifier enclosure. The D-1 keys are held in each door interlock as long as the door is open.
Insert key N-1 in L-C interlock on the negative disconnect switch N and turn to unlock.
Open negative disconnect switch N. Key N-1 is now held.

Reverse sequence to restore service.

 

Links for more interlock application scheme information:

Contents | Introduction | Symbols Legend | Scheme Book

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
Scheme # 41
Scheme # 42
Scheme # 42A
Scheme # 42B
Scheme # 43
Scheme # 43A
Scheme # 44
Scheme # 45
Scheme # 45A
 
   

Copyright © 2000-2007 Kirk Key Interlock. All Rights Reserved.
Terms and Conditions
Web Site, Graphics & Design by R.S.Venables