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IB01602046E
Instruction Booklet
Page
16
Effective: July 2010
2-Position Contactor Based
Non-Automatic Transfer Switch
Section 5: Operation
5.1 General
A non-automatic transfer switch 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. Locate the manual lever on the left side of the contactor.
3. Locate the handle used to manually transfer the switch.
4. Attach the handle to the manual lever.
5. Rotate the lever down to go to Source 1.
6. Rotate the lever down again to go to Source 2.
Figure 17. Non-Automatic Transfer Switch Manual Operating
Handle in Use.
7. Once the manual operation is complete and non-automatic
(electrical) operation is desired, connect the sources of
power.
8. Follow the testing procedure in Section 6 to ensure proper
non-automatic (electrical) operation.
5.3 Non-Automatic Operation (Electrically
Operated)
A non-automatic (electrically operated) transfer switch functions
similarly to the non-automatic (manually operated) transfer switch
except for the addition of an electrical operating device panel on
the door. This permits the main contacts to be opened and closed
electrically. There is, however, no intelligence associated with
this design.
Electrical operation is accomplished by adding required indication
lights and push buttons (located on the front device panel) to the
operating mechanism of the 2-position contactor.
With the transfer switch connected to Source 1, to transfer from
Source 1 to Source 2 turn the 2-position selector switch to
"Source-2" position. Conversely, with the transfer switch con-
nected to Source 2, to transfer from Source 2 to Source 1 turn
the 2-position selector switch to "Source-1" position. The
switch's operating position and source availability can be visually
indicated via. indication lights installed on the front device panel
without opening the door (Figure 18).
Figure 18. Electrically operated 2-Position Selector Switch and
Position Indication Lights Shown Mounted.
Since an intelligence circuit is not part of the non-automatic
transfer switch design, operation of the 2-position selector switch
mentioned above (Figure 18) is required each time an electrical
transfer is required.
WARNING
DO NOT ATTEMPT TO MANUALLY OPERATE THE NON-AUTO-
MATIC TRANSFER SWITCH WITH SOURCE 1 OR SOURCE 2 AVAIL-
ABLE.
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.
