Eaton Electrical Magnum Transfer Switch manual Bypassing the Transfer Switch, Automatic Operation

Fixed and Drawout Magnum Transfer Switches

Figure 36. Magnum Bypass Lights.

The right door control panel has the following standard features:

1.Light to indicate if the Source 1 switching device is isolated (only if the Source 1 switching device is racked out).

2.Light to indicate if the Source 2 switching device is isolated (only if the Source 2 switching device is racked out).

3.Light to indicate if the Source 1 bypass switching device is closed.

4.Light to indicate if the Source 2 bypass switching device is closed.

7.3 Bypassing the Transfer Switch

WARNING

THE CLOSED TRANSITION PRODUCT CONTAINS A SPECIAL CON- TACT ARRANGEMENT (OVERLAPPING CONTACTS). MISUSE CAN RESULT IN DEATH, SEVERE PERSONAL INJURY, AND/OR PROPERTY DAMAGE.

7.3.1 Source 1 to Source 1 BYPASS

The Source 1 switching device can be bypassed and isolated by the following sequence (Figures 36 and 37):

1.Move the generator selector switch to the OFF position to avoid nuisance starts.

2.Close the Source 1 bypass switch manually. The Source 1 bypassed light will illuminate.

3.Open and rack out the Source 1 switching device (see Section 6). The Source 1 isolated light will illuminate and the Source 1 position energized light will no longer be illuminated.

4.Inspect and/or perform the needed maintenance on the Source 1 switching device.

5.Rack in the Source 1 switching device (see Section 6). The Source 1 switching device will automatically recharge and close when it is in the CONNECT position. The Source 1 iso- lated light will no longer be illuminated, but the Source 1 posi- tion energized light will be illuminated.

6.Open the Source 1 bypass switch. The Source 1 bypassed light will no longer be illuminated.

7.The Source 1 switching device is now back in automatic oper- ation.

7.3.2Source 2 TO Source 2 BYPASS

The Source 2 switching device can be bypassed and isolated by the following sequence:

1.Move the generator selector switch to the RUN position to avoid losing power.

2.Close the Source 2 bypass switching device manually. The Source 2 bypass light will illuminate.

7.2 Automatic Operation

The intelligence/supervisory circuits on Eaton transfer switches constantly monitor the condition of both the Source 1 and Source 2 power sources. These circuits automatically initiate an immedi- ate transfer of power from the Source 1 to the Source 2 power source when the power source fails or the voltage level drops below a preset value. Transfer back to the Source 1 power source is automatic upon return of the Source 1 power source.

Monitoring the power source is always performed on the line side of the power source to which the switch is connected. The Source 1 power source is the preferred source and the transfer switch will always seek this source when it is available.

3.Open and rack out the Source 2 switching device

(see Section 6). The Source 2 isolated light will illuminate and the Source 2 position energized light will no longer be illumi- nated.

4.Inspect and/or perform the needed maintenance on the Source 2 switching device.

5.Rack in the Source 2 switching device (see Section 6). The Source 2 switching device will automatically recharge and close when in the CONNECT position. The Source 2 isolated light will no longer be illuminated, and the Source 2 position energized light will illuminate.

6.Open the Source 2 Bypass switch. The source 2 Bypass light will no longer be illuminated.

7.The Source 2 Switch is now back in automatic operation.