Rockwell Automation 1502 Medium Voltage Contactor, 800A (Series D and E) - Manual (Page 39)

4-10 Maintenance
1502-UM051E-EN-P – June 2013
If the dimension is less than 7.6 mm (0.300 in.), loosen the gap locking nut on
all three (3) bottles. Starting on phase B, turn the gap adjustment nut upwards
until 7.6 mm (0.300 in.) is achieved. Repeat this procedure for phases A and C,
ensuring that the measurements are equal for all three (3) phases. Tighten and
torque the gap locking nuts for all three (3) phases.
Note: Ensure that the armature plate is solidly positioned against the stop and
compress the return spring further if necessary.
Note: Account for all tools, including the set-up rod, used during the above
procedure. If any tools are unaccounted for, do not energize the equipment.
17. Using the “TEST” control circuit in the starter, energize the contactor and
check for minimum allowable overtravel on all three vacuum bottle assemblies
with a feeler gauge. The overtravel dimension shall be 2.5 mm (0.100 in.) mini-
mum as shown in Figure 4.12.
2.5 mm
(0.100 in.)
Min.
2.5 mm
(0.100 in.)
Min.
Side View Front View
Figure 4.12 – Minimum Allowable Overtravel
If the overtravel dimension is less than 2.5 mm (0.100 in.), leave the contactor ener-
gized and loosen the load terminal nut on all three (3) phases. Turn the insulator
downwards on phase B until the dimension of 2.5 mm (0.100 in.) is achieved,
then tighten the load terminal nut. Repeat this procedure for phases A and C,
ensuring that the measurements are equal for all three (3) phases. Tighten and
torque the gap locking nuts on all three (3) phases.
Note: Both the 7.6 mm (0.300 in.) and 2.5 mm (0.100 in.) dimensions must be
achieved for proper function. If it is not possible to achieve these dimensions,
consult your local Rockwell Automation field support representative.
Vacuum Bottle Replacement
and Set-up Procedure (cont.)