Emerson THROUGH 1200 manual Electrical Operation, Close the enclosure door first

INSTALLATION (continued)

observe these lights

Automatic Closed Transition

Transfer Switch

		Transfer
Transfer Switch	Transfer Switch	Control
Connected	Connected	Retransfer	Transfer	Extended	Failure	TS
To	To	Delay	Test	Parallel	To	Locked
Normal	Emergency	Bypass	(15HOLDSECONDSFOR )	Time	Synchronize	Out
GREEN	RED			RED	RED	RED

Normal	Emergency	operate		Closed
		this switch
Source	Source		Alarm	Transition
Accepted	Accepted		Reset	Bypass
GREEN	RED

Figure 1-7. Standard controls and indicators.

3 --- Electrical Operation

This procedure will check the electrical operation of the Automatic Closed–Transition Transfer Switch. See Figure 1---7.

!

Close the enclosure door first.

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.

■Black square means light is on.

❐White square means light is off.

**If you do not want closed–transition transfer, press the

Closed Transition Bypass pushbutton while the controller display shows Waiting for In–Sync. This action causes open–transition (momentary load interruption) transfer to the opposite source, if conditions permit. Also refer to the Group 5 Controller User’s Guide 381333–126.

This completes the Functional Test of the ACTS.

The Transfer Switch Connected

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

Turn and hold Transfer Control switch clockwise to Transfer Test

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

Transfer switch CE closes and then Transfer Switch CN opens (closed–transition overlap). The Transfer Switch Connected To

3Emergency light should come on and the Transfer Switch Connected to Normal light goes off (you might see and hear the brief overlap transfer). **

Transfer switch will operate back to Normal position after Feature 3A time delay. For immediate retransfer turn Transfer Control

4counterclockwise 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.

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