Emerson 7000 manual Electrical Operation, The Transfer Switch Connected, INSTALLATION continued

INSTALLATION (continued)

GREEN RED

observe these lights

GREEN RED

operate this switch

Figure 1-5. Standard controls and indicators.

3 – Electrical Operation

This procedure will check the electrical operation of the Automatic Transfer Switch. See Figure 1–5.

Be sure to close the enclosure door before proceeding to prevent personal injury in case of electrical system fault.

Transfer Test

Both normal and emergency sources must be available and the emergency source generator (if used) must be capable of being started in this procedure.

Perform steps 1 through 5 at the right. Observe the status lights.

QBlack square means light is on. S White square means light is off.

This completes the Functional Test of the ATS.

The Transfer Switch Connected

1To Normal and Normal Source Accepted lights should be on.

Turn and hold Transfer Control switch clockwise to Transfer

2Test until the engine starts and runs (within 15 sec.). Emergency Source Accepted light should come on.

Transfer switch will operate to the Emergency position after Feature 2B time delay. The

3Transfer Switch Connected To Emergency light should come on and Load Connected to Nor- mal light goes off.

Transfer switch will operate back to Normal position after Feature 3A time delay. For im- mediate retransfer turn Transfer

4Control counterclockwise to Retransfer Delay Bypass. The Transfer Switch Connected To Normal light should come on; Transfer Switch Connected to Emergency light should go off.

The engine–generator will stop after the Feature 2E time delay

5(unloaded running engine cool- down). The Emergency Source Accepted light should go off.

1---4