3.4 Setting the Actuator Limit Switches
On the actuators used for pressing interlocks and for installing/removing breaker there are magnetic limit
switches that help to control how far the actuators extend and retract. This allows the actuators to be set so
that they only extend and retract to set limits and cannot over extend/retract themselves for operations where
specific distances need to be traveled.
There are three different types of operational actuators; these three types are non-adjustable, adjustable by
Philips head, and adjustable by Allen wrench. The non-adjustable actuators are generally quite small and will
never need to be adjusted and there are no limit switches on them to set.
Adjustable by Philips head screwdriver
1.
Loosen the two screws with a Philips head screwdriver.
2.
Position the limit switches as desired, these switches determine how the actuator
extends and retracts.
3.
Secure the limit switches by screwing back in the screws – be EXTREMELY careful not to
over tighten these screws as they are fragile, very little torque is needed in order to
secure those limit switches.
Adjustable by Allen wrench
1.
Locate the plastic cover with wires entering.
2.
Gently pry the plastic cover off with a flathead screwdriver.
3.
Loosen the two set screws with a #2 Allen Wrench.
4.
Position the limit switches as desired, these switches determine how the actuator
extends and retracts.
5.
Secure the limit switches by screwing back in the set screws – be EXTREMELY careful not
to over tighten these screws as they are fragile, very little torque is needed in order to
secure those limit switches.
Figure 3.4 – Adjustable by Screw actuator
Limit switches
