In Cell Testing; Racking, Test To Connect - ABB AMVAC Manual

Figure 4.23 Circuit breaker position indicator
4.7

In Cell Testing

Functional testing of the breaker should be
performed in the test position prior to
racking breaker into the CONNECTED
position.
1. Insure breaker is charged by the visual
charged flag on the front of the breaker.
If monitoring of breaker READY signal is
being performed, insure breaker READY
signal is active.
2. Perform a close of the breaker using
either or both the manual closing switch
on the gear or associated breaker relay.
Check that the breaker is closed and
appropriate indicating lights are active.
3. Insure breaker charges and returns to
READY status.
4. Perform a open of the breaker using
either or both the manual opening switch
on the gear or associated breaker relay.
Check that the breaker is open and
appropriate indicating lights are active.
Courtesy of NationalSwitchgear.com
Figure 4.24 Circuit breaker in CONNECTED position

4.8 Racking, TEST to CONNECT

To rack from the TEST position to the
CONNECTED position:
5. Press down on the Racking Release
Handle on the breaker compartment
door.
6. Engage the racking screw with the
Racking Tool and rotate clockwise (CW)
approximately 21 turns.
7. Release the handle and continue to rack
the unit by rotating the racking tool
clockwise. A
resistance indicates that the unit is
engaging the primary contacts. When
the racking screw stops, the breaker is
now in the CONNECTED position.
8. Verification can be made by confirming
the position indicator on the right side
breaker rail shows CONNECTED (
4.24 ).
slight increase in
Figure
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