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KS 3-2010
Page 19
7.3.1 Purpose
To verify that the electrical operator (Figure 8) will operate the switch to the ON and OFF positions.
7.3.2 Equipment
This test requires a power supply capable of maintaining the rated voltage.
7.3.3 Procedure
WARNING—Follow all safety procedures described in Section 2.
CAUTION—
Switches and accessory devices can be damaged if power is applied to the wrong terminals.
The specific lead wires or terminals for each accessory must be properly identified before conducting any of
the following tests.
7.3.3.1
After disconnecting and locking out all power, remove the control circuit wires from the
terminals of the electrical operator.
7.3.3.2
Set test power supply to the rated voltage of the electrical operator and connect to the terminals
of the electrical operator marked “common” and “close” or “on.”
7.3.3.3
With the switch in the OFF position, turn on the test power supply. The switch contacts should
close.
WARNING—High Voltage. Do not touch switch or test leads while voltage is applied.
7.3.3.4
Turn the test power supply off. Disconnect its leads to the electrical operator.
7.3.3.5
Connect the test power supply leads to the terminals of the electrical operator marked
“common” and “open” or “off.”
7.3.3.6
With the switch in the ON position, turn on the test power supply. The switch contacts should
open.
7.3.3.7
When the test is completed, turn off the test power supply, disconnect it from the electrical
operator terminals, and reconnect the control circuit wires to the electrical operator terminals.
NOTE
—It may also be possible to test the operation of the electrical operator by leaving the control circuit wiring in place and
energized and pushing the “open” and “close” buttons on the operator. Follow step 7.3.3 to ensure that the main power to the switch
is disconnected, but the power to the control circuits would be left in place.
7.3.4 Results
The switch should operate to the ON and OFF positions when the above steps are followed. If the switch
does not operate properly, check the connections and ensure that there is no obvious obstruction of the
operating mechanism and repeat the test. If the electrical operator still does not operate properly, it should
be replaced.
7.3.5 Reinstallation
Procedure
For reinstallation or replacement of the switch and/or accessories, follow the safety installation
procedures given in 2.3.
© Copyright 2010 by the National Electrical Manufacturers Association.
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