GE Comprehensive Installation Guide for Transfer Switch Models

Installation (cont’d)

DANGER

HAZARDOUS VOLTAGE

(Can Cause Severe Injury or Death)

Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.

E

4	1
5	2	P Relay
		(Engine Start)

6 3

Contact rating is

10 Ampere at 120VAC or 28VDC Gold plated

Figure 3

Engine Start

Control Connections

The engine-start terminals are clearly identified by a label on the microcontroller backplate. In the case of manual transfer switches, or in other applications not requiring the microprocessor, clearly marked terminal blocks are provided in the upper left corner of the con- trol panel for the engine start control wires.

Terminals for field connections to the A3 Source 2 auxiliary contacts and the A4 Source 1 auxiliary contacts are also provided. These terminals are clearly marked and appear on the side of the power panel. On 400 amp metal frame units these terminals appear on the bracket above the operator handle.

NOTE: The controller will illuminate Source 2 Available LED when preset voltage and frequency levels are reached.

8.Verify the phase to phase voltages at Source 1 line terminals.

9.Verify that the phase rotation of Source 1 is the same as the phase rotation of

Source 2.

10.Shut down the generator engine.

11.Place the starting control in the Automatic position.

12.Complete the visual inspection of the transfer switch.

13.Close the enclosure.

14.Lock the enclosure.

Initial Energization

Before proceeding, refer to the information package supplied with the ATS and read and understand the information on all accessories provided.

1.Unlock the enclosure.

2.Open the enclosure.

3.Verify the correct system voltage.

NOTE: The equipment rating nameplate on the transfer switch lists the voltage. See Figure 4.

4.Close Source 1 circuit. breaker.

NOTE:The controller will illuminate Source 1 Available LED if proper voltage

is sensed.

5.Verify the phase to phase voltages at the Normal line terminals.

6.Close the Source 2 circuit breaker.

7.Start the generator engine.

GE Zenith Controls

SERIAL NUMBER:
RATING: VOLTS -
	HZ -
AMPS -	PHASE -
SYSTEM VOLTS:
MODEL NUMBER:

Figure 4

CAUTIONS

Certain accessories, per specific

schematics, can inhibit automatic transfer.

Engine Gen-Set could start when engine control wires are attached.

■ 6 ZTG/ZTGD Operation and Maintenance Manual (70R-1000D) GE Zenith Controls ■