12
1VAL050601-MB Rev C
2. Begin racking procedure using approved racking crank:
a. Insert racking crank socket into breaker door access port and rotate until socket slides into position.
b. Hold racking crank with left hand and depress position lever with right hand.
c. Turn racking crank counter-clockwise for a ¼ turn before releasing position lever.
d. Continue racking counter-clockwise (approx. 21 turns) until ”Test” position is reached.
e. A positive stop will be felt and the position release lever will snap into up position.
f. Relieve tension on the racking pin and mechanical/electrical interlocks by reversing the racking crank slightly.
T
EST
→
D
ISCONNECT
:
1. Perform visual inspection of the circuit breaker:
a. Verify breaker is OPEN (push open button or initiate external electric trip if CLOSED).
b. Verify switchgear breaker door is closed and secured.
2. Begin racking procedure using approved racking crank:
a. Follow step 2 or racking for the disconnect to test position.
INSERTION AND REMOVAL
Notes
:
A. Closed door racking is recommended between ALL positions.
DISCONNECT
TEST
CONNECT
Approximate Distance from
Disconnect
40 MM
4 REVOLUTIONS
1.57 INCHES
250 MM
25 REVOLUTIONS
9.84 INCHES
Manual Operation
YES
YES
NOT RECOMMENDED
Electrical Operation
NO
YES
YES
Control Power Available
NO
YES
YES
Shutter
CLOSED
CLOSED
OPEN
Primary Contacts Engaged
NO
NO
YES
Position Indication
POSITIVE LOCK & CELL DECAL
POSITIVE LOCK & CELL DECAL
POSITIVE LOCK & CELL DECAL
Interlocks
INTERFERENCE BLOCKING PREVENTS
INSERTION
RELEASE LEVER
RELEASE LEVER
CLOSING PREVENTED BETWEEN
POSITIONS
CLOSING PREVENTED BETWEEN
POSITIONS
RELEASE LEVER
Requirements To Rack
breaker from Position
BREAKER OPEN
POSITION RELEASE LEVER ACTUATED
BREAKER OPEN
POSITION RELEASE LEVER ACTUATED
BREAKER OPEN
POSITION RELEASE LEVER ACTUATED
Table 1: Summary Racking Data
#
Description
A
COMPARTMENT SLOTS
B
GROUND BAR
C
INTERFERENCE
BLOCKING PLATE
D
SECONDARY DISCONNECTS
E
WHEEL RAILS
F
SHUTTERS
G
BREAKER POSITION LABEL
DISCONNECT / TEST / CONNECT
H
COMPARTMENT DOOR
I
TOC SWITCH
Figure 1: Basic Cell
D
E
A
B
G
F
C
H
I
Provided
by
Northeast
Power
Systems,
Inc.
(NEPSI)
Summary of Contents for AMVAC
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Page 46: ...46 1VAL050601 MB Rev C APPENDIX F Provided by Northeast Power Systems Inc NEPSI ...
Page 47: ...47 1VAL050601 MB Rev C APPENDIX G Provided by Northeast Power Systems Inc NEPSI ...
Page 49: ...49 1VAL050601 MB Rev C NOTES Provided by Northeast Power Systems Inc NEPSI ...
