Generac Power Systems 004635-2, 004635-1 owner manual Actuating Transfer Switch

Section 3 — Operation

Generac GTS “W” Type Transfer Switch

Figure 3.1 — Actuating Transfer Switch

3.When certain that UTILITY supply voltage is cor- rect and compatible with transfer switch ratings, turn OFF the UTILITY supply to the transfer switch.

4.On the generator panel, set the AUTO-OFF- MANUAL switch to MANUAL position. The gener- ator should crank and start.

5.Let the generator stabilize and warm up at no- load for at least five minutes.

6.Set the generator's main circuit breaker (CB1) to its ON or CLOSED position.

DANGER

PROCEED WITH CAUTION. GENERATOR OUT- PUT VOLTAGE IS NOW BEING DELIVERED TO TRANSFER SWITCH TERMINALS. CONTACT WITH LIVE TERMINALS RESULTS IN EXTREMELY DANGEROUS AND POSSIBLY FATAL ELECTRI- CAL SHOCK.

7.With an accurate AC voltmeter and frequency meter, check the no-load, voltage and frequency.

Single-phase generator supply:

Measure across ATS terminal lugs E1 to E2; E1 to NEUTRAL and E2 to NEUTRAL.

a. Frequency	60-62 Hz
b. Terminals E1 to E2	240-246 VAC
c. Terminals E1 to NEUTRAL	120-123 VAC
d. Terminals E2 to NEUTRAL	120-123 VAC

Three-phase generator supply:

Measure across ATS terminal lugs E1 to E2, E2 to E3 and E1 to E3.

Measure across ATS terminal lugs E1 to NEU- TRAL, E2 to NEUTRAL and E3 to NEUTRAL.

a. Frequency	60-62 Hz
b. Terminals E1-E2, E2-E3, E1-E3 ....	208-212 VAC
c. Terminals E1-N, E2-N, E3-N	120-122 VAC

It will also be necessary to verify that the phase rota- tion of the utility matches the phase rotation of the generator. This can be done by using a phase rotation indicator.

6 Generac® Power Systems, Inc.