Emerson ADTS manual Voltage Checks, Standard controls and indicators

INSTALLATION (continued)

Press for 15 Sec.

observe these lights

Figure 1-14. Standard controls and indicators.

2 --- Voltage Checks

First check the nameplate on the transfer switch; the rated voltage must be the same as the normal and emergency line voltages.

Verify that the feeders have been

connected to the proper terminal lugs.

Use extreme caution when using a meter to measure voltages. Do not touch power terminals; shock, burns, or death could result !

Perform steps 1 through 6 at the right. Observe the status lights. See Figure 1–14.

●Black circle means light is on.

❍White circle means light is off.

*If necessary, adjust the voltage regulator on the generator according to the manufacturer’s recommenda- tions. The automatic transfer switch will respond only to the rated voltage specified on the transfer switch nameplate.

Note: Refer to Section 3 of the Group 5 Controller User’s Guide 381333–126 for how to display the status of the ATS and the voltage and frequency of each source.

Note: Press the Lamp Test button to verify that all five lights work.

Now continue to 3 --- Electrical Operation on next page.

1---7

Close the normal source (utility) circuit breaker. Two two left lights should come on. The

1normal source Accepted (upper left) and the Transfer Switch Position connected to normal (lower left) lights should be on.

Carefully use an accurate voltmeter to check the phase to

2phase and phase to neutral voltages present at the transfer switch normal source terminals.

Close the emergency source (generator) circuit breaker. (Start generator, if necessary.)

3Another light should come on. The emergency source Accepted light (upper right) should be on.

Carefully use an accurate voltmeter to check the phase to

4phase and phase to neutral voltages present at the transfer switch emergency source terminals.*

	Carefully use a phase rotation	A B C
	meter to check the phase
5	rotation of the emergency
	source; it must be the same as
	the phase rotation of the normal
	source (refer to wiring diagram).

Shut down the generator, if applicable. The emergency source Accepted light (upper

6right) should go off. Then set the generator’s starting control switch to automatic. Remove all meters; close enclosure door.