Emerson E-DESIGN 150-400A manual Voltage Checks, Standard controls and indicators

Page 6

INSTALLATION (continued)

GREEN

RED

RED

RED

RED

observe these lights

GREEN RED

Figure 1-6. Standard controls and indicators.

2 --- Voltage Checks

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

Verify that the feeders have been connected to the proper lugs.

Before energizing the switch check to be sure that both normal and emergency contacts are not left in the closed position.

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---6.

Close the normal source circuit breaker. The Transfer Switch

1Connected To Normal and the Normal Source Accepted lights should come on.

Use an accurate voltmeter to check phase to phase and

2 phase to neutral voltages pres- ent at the transfer switch normal source terminals.

Close the emergency source circuit breaker. (Start generator,

3if necessary.) The Transfer Switch Connected To Normal & Emergency Source Accepted lights should come on.

Use an accurate voltmeter to check phase to phase and

4 phase to neutral voltages pres- ent at the transfer switch emer- gency source terminals.*

Q Black square means light is on.

Use a phase rotation meter to

A B C

S White square means light is off.

* If necessary, adjust voltage regulator on the generator

according to the manufacturer’s recommendations. The

Automatic Transfer Switch will respond only to the rated

voltage specified on the Transfer Switch nameplate.

Note: Refer to Section 3 of 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.

Now continue to 3 --- Electrical Operation on next page. First check nameplate on transfer switch; rated voltage must be the same as normal and emergency line voltages.

1---

4

5 check phase rotation of emer- gency source; it must be the same as the normal source.

Shut down the engine–genera- tor, if applicable. The Emergen- cy Source Accepted light should

6go off. Then put the starting control selector switch (on the generator set) in the automatic position. Close enclosure door.

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Contents Rating Label NameplateCatalog Number Identification Installation Controller Ground HarnessesAuxiliary Circuits Engine Starting Contacts Manual Operation Emergency contacts Window IndicatorsNormal contacts Contact position Indicators left side HandleStandard controls and indicators Voltage ChecksElectrical Operation Transfer TestTesting & Service United States call 1 800 800 AscoTesting & Service Index See Controller User’s Guide