TRENDnet Series 300 Electrical Operation, INSTALLATION continued, If the transfer to emergency

INSTALLATION (continued)

press this button

Florham Park NJ 07932 USA

TRANSFER SWITCH TEST	BYPASS TIME DELAY SET ENGINE EXERCISER
Press for 15 Seconds	Press until light FLASHES

observe these lights

Figure 1–6. Standard controls and indicators.

3 – Electrical Operation

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.

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

Perform steps 1 through 8 at the right. Observe the status lights. See Figure 1–6.

●Black circle means light is on. ❍ White circle means light is off.

NOTE: If Motor Load Transfer feature is activated, then transfer may not occur immediately after the respective time delays. Transfer will only occur when the phase relationship between sources is correct.

This completes the Functional Test of the ASCO Series 300 Automatic Transfer Switch. Leave the engine–generator starting control in the automatic position.

The normal source must be
available and the generator
1 must be ready to start.
Check that the Normal Source
Available light is on.
Press and hold the Transfer	TRANSFER SWITCH TEST

2Switch Test button until the engine starts and runs. This should happen within 15 sec.

3The Emergency Source Available light should come on.

The transfer switch should transfer to the Emergency

4position. The Load Connected to Emergency light should come

on and the Load Connected to Normal light should go off.

If the transfer to emergency
delay is used the transfer	BYPASS TIME DELAY

5should occurs after a time delay (up to 5 minutes).

For immediate transfer press the Bypass Time Delay button.

The transfer switch should transfer back to the Normal

6position. The Load Connected to Normal light should come on

and the Load Connected to Emergency light should go off.

If the retransfer to normal delay
is used the retransfer should	BYPASS TIME DELAY

7occur after a time delay (up to 30 minutes).

For immediate retransfer press the Bypass Time Delay button.

The unloaded running delay keeps the generator running for

85 minutes (cool–down period). Then the generator should stop

and the Emergency Source Available light should go off.

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