Testing
CAUTION
Due to hazardous voltage and current, GE Zenith recommends that a GE Zenith Certified technician or a qualified electrician must perform the installation and maintenance of the switch.
WARNING
Both power sources must be disconnected before manual operation of the switch.
Introduction
A manual operator handle is provided with the transfer switch for maintenance purposes only. Manual operation of the switch must be checked before it is operated electrically. Both power sources must be
disconnected before manual operation of the
switch. Insert the handle and operate the transfer switch between the Source 1 and Source 2 positions. The transfer switch should operate smoothly without binding. Return the switch to the Source 1 position, remove the handle, and return it to the holder provided.
After completing the inspection, cleaning and servicing of the transfer switch, reinstall the switch cover, and close and lock the cabinet door. Reclose the circuit breakers feeding the utility and generator sources to the switch.
Initiate the electrical transfer test by activating the test switch. P timer will time out and the microcon- troller will send an engine start signal. When
the W time has elapsed, the switch will complete its transfer by closing into the Source 2.
Deactivating the test switch will start retransfer to Source 1. The switch will complete its retransfer to Source 1 after the time delay of the T timer. The U engine overrun timer allows the engine generator to run unloaded for a preset cool down period.
Test Options
The ATS can be tested in either of two positions:
1)“Auto Position”
Full Transfer Test - This test checks the complete operation of the ATS by transferring the load’s power source from Source 1 to Source 2.
2)“Test Position”
This procedure is recommended for Preventive Maintenance (PM) of ATS without interrupting the Load thru the BYPASS/ISOLATION SWITCH.
NOTE: A periodic test of the transfer switch under load conditions is recommended to insure proper operation. (See National Electric Code articles 700 and 701).
WARNING
When performing a
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