THEREFORE, it should take considerable wind-up of the P-O-P pipe to get the handle in
position to force it into the closed slot. Remember that as the switch gets older, it will become
harder to operate and more force will be required on the operating handle to completely close
the switch. The operator must do whatever it takes to completely close the switch.
1. On the lock segment assembly adjust the closed and open segments so that they
are approximately 90°/100° apart but with adjustment still left in the slots in each
direction and tighten down the bolts loosened in Step B.7 above until the split washer
is flattened.
NOTE: Before tightening bolts put the end of the ground strap from the handle
assembly under the flat washer on the bolt. Leave enough slack in the ground
strap to allow the operating handle to travel fully from the open position to the
close position with out any interference (see figure in C.4 below).
2. The handle casting should be mounted about four (4) to six (6) inches above the lock
segment assembly. Position the handle casting so that with the switch closed (blades
tight up against the spacer), the operating handle will strike point "A" on the lock
segment assembly when the operating handle is lowered (see below). This will ensure
that when the switch is fully closed, it will take considerable wind-up torque to get
the operating handle into the closed slot on the lock segment assembly.
3. Tighten the four (4) clamp bolts until the split washer is flattened. (DO NOT TIGHTEN
THE PIERCING SET SCREWS YET). Open and close the switch slowly and then rapidly.
Check for a smooth operation of the switch. Adjust the pipe guides for a smooth,
non-binding operation and tighten down both bolts in each pipe guide assembly.
Make sure that the switch can be fully opened and fully closed (blade tight up against
the spacer on all three phases).
4. Make sure that the switch handle will strike point "A" of the lock segment assembly
and that considerable wind-up torque is needed to get the switch operating handle
into the closed slot of the lock segment assembly.
5. If needed, reposition the handle casting by loosening and retightening the four (4)
clamp bolts, until the operation of the switch meets the requirements explained in
steps C.2, C.3 and C.4. Adjustments may also be made by moving the lock segment
slightly on the lock segment assembly.
Phase-over-phase Vector® group-operated switches (600 and 900 A) Instruction Manual
7
To Next Page