14
Interlock Test
7.
With the ACB 1, port ‘A’ fixing nuts adjusted only enough to allow Jig 2 to be fully inserted, tighten the
fixing nuts to a torque of 12.5Nm. Remove Jig 2.
8.
Tighten ACB 2, port ‘D’ fixing nuts to a torque of 12.5Nm.
9.
Charge the ACB 1 closing springs if not already charged. With ACB 1 in the ‘charged’ condition press
the green ’ON’ button. ACB 1 should not close. Because ACB 2 is closed and in the connected position.
10.
Return to ACB 2. Press the RED ‘OFF’ button on ACB 2. A loud noise will be heard. The main contacts
should now be in the open state. Confirm this is true.
11. To confirm that the cable has not slipped, re-charge ACB 2 and close the main contacts as described in
step 2. Return the ACB 1.
12. Using Jig 2 confirm at ACB 1 that the play between the trip bar and the trip bar lever has not increased
(should be 0.5-
1.0mm of play). If required adjust ACB 1 port ’A’ fixing nuts to shorten the inner core
length and re-secure as per step 7. Repeat steps 9 to 12 three times or until cable integrity is confirmed.
ACB 1 cable adjustment is now complete. ACB 2 cable adjustment must now be done. Open main
contacts of ACB 2. Go to step 13.
13.
Rack ACB 2 into the ‘TEST’ position.
14.
Return to ACB 1 and press the GREEN ‘ON’ button. The main contacts of ACB 1 should Close with a
loud noise. Confirm this is true.
15. Return to ACB 2. Follow the same cable adjustment setting procedure explained in points 3
—
12, but this
time for ACB 2 (all references to ACB 1 will now be ACB 2 and all references to ACB 2 will now be ACB
1).
Once the interlock is confirmed to function as per table 1.0, leave ACB 1 and ACB 2 in the ‘OPEN’ state and
in the ISOLATED position in preparation for final commissioning at a later date.
END OF TYPE C ADJUSTMENT AND TEST PROCEDURE
