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IB01602015E
Instruction Booklet
Page
20
Effective: August 2010
ATC-300 2-Position Contactor
Based Transfer Switch
Section 5: Operation
5.1 General
An ATS provides a power contactor to connect and disconnect
the load to and from the Source 1 and Source 2 power sources
(Section 3.2.1).
5.2 Manual Operation
To manually operate:
1. Disconnect all sources of power.
2. Disconnect the J7 connector from the ATC-300 controller.
3. Locate the manual lever on the left side of the contactor.
4. Locate the handle used to manually transfer the switch.
5. Attach the handle to the manual lever.
6. Rotate the lever down to go to Source 1.
7. Rotate the lever down again to go to Source 2.
Figure 18. ATS Manual Operating Handle in Use.
8. Once the manual operation is complete and automatic opera-
tion is desired, connect the sources of power.
9. Check for 120 Vac at J7-4 to J7-3 if Source 1 is available.
10. Check for 120 Vac at J7-2 to J7-1 if Source 2 is available.
See the Troubleshooting Guide (Table 3, Section 7 of ATC
300 Controller Instruction Booklet IB01602009E) if values
are above 130 Vac or below 110 Vac.
11. Insert the J7 connector into the controller.
12. Follow the testing procedure in Section 6 to ensure proper
automatic operation.
WARNING
DO NOT ATTEMPT TO MANUALLY OPERATE THE ATS WITH
SOURCE 1 OR SOURCE 2 AVAILABLE.
WARNING
HIGH VOLTAGES ARE PRESENT IN AND AROUND TRANSFER
SWITCH EQUIPMENT. BEFORE ATTEMPTING TO MANUALLY
TRANSFER, DISCONNECT THE LINE POWER FROM THE EQUIP-
MENT BEING SERVICED BY OPENING AND LOCKING OUT, IF POSSI-
BLE, THE NEXT HIGHEST DISCONNECT DEVICE. FAILURE TO
FOLLOW THIS PROCEDURE COULD CAUSE SEVERE PERSONAL
INJURY AND/OR DEATH.
ALWAYS TURN THE SOURCE 1 POWER OFF AND TURN THE
SOURCE 2 (IF A GENERATOR) CONTROL SELECTOR SWITCH TO
THE “OFF” POSITION BEFORE ATTEMPTING A MANUAL TRANS-
FER.
