• As the blade continues to rotate open, the interrupter will trip thus interrupting
the load. The interrupter must trip while the lever arm is in metal-to-metal contact
with the contactor. The interrupter should trip ("fire") before the contactor gets
within 1/2" to 3/4" of the end of the lever.
• Continue to open switch until the interrupter lever has cleared the end of the
nylon push bar of the contactor assembly. Once the lever has cleared the
push bar, the lever will spring back slightly. This allows the nylon push bar of
the contactor assembly to engage the lever and lift the lever into position,
when the switch is being closed. Open the switch fully.
5. Now, close the switch slowly. The following operations and checks should be made:
a. As the blade rotates closed the push bar must pick up the lever at least 1/2" from the
end of the lever.
b. Continue to close the blade. When the lever is at 90°to the interrupter, the push bar
should be at least 1/2" from the side of the connecting rod. At no time during the
closing of the switch should the push bar touch the connecting rod.
Phase-over-phase Vector® group-operated switches (600 and 900 A) Instruction Manual
10
To Next Page