11
3:1 MAIN SWITCH REMOVAL AND REPLACEMENT
WARNING: When replacing any parts of the mechanism, isolate the
transfer switch from all possible sources of power.
To remove the main normal or emergency switches, first electrically isolate the
transfer switch from all power sources.
a) Disconnect all cables and wiring from the switch terminals.
b) Disconnect wiring to limit switches and motor and any tie-points on the top
support.
c) The top support complete with motor and operating mechanism can now be
lifted clear after removing the eight top support screws (see mechanical
assembly on page 14).
d) After removing the buss bar from the breakers, the individual switches can
now be readily unfastened and removed from the back panel.
Replacement is the reverse of the above procedure. Note when replacing
the arm assembly, ensure that the switches are set one “off” and one “on”
and that the rollers on the arm actuators equally straddle the switch
operating levers. Please note that the roller assemblies may need to be
independently adjusted when replacing breakers. The roller adjustments
may be performed as follows:
1. To give maximum travel of the lever arm, position the crank block at a
90-degree angle in relation to the arm.
2. Using the breaker which is in the OFF position, push the white roller
tight against the breaker lever. Securing the #10 screw (mechanical
assembly reference # 28) with a screw driver, tighten the two #10 hex
nuts (mechanical assembly reference # 29) closest to the roller against
the actuator carrier bracket.
3. Confirming that the roller is tight against the switch lever, tighten the
two #10 hex nuts farthest from the roller tight against the actuator
carrier bracket
4. Manually transfer the switch to the opposite position. Repeat steps 1, 2
and 3 above.
5. Check adjustments and repeat if necessary.
User Manual for the OPT2600 Series
Automatic
Transfer Switch
