GE Entelli-Switch 250 Installation cont’d, Engine Start Control Connections, Initial Energization

Page 4

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.

 

4

1

 

E

5

2

P Relay

(Engine Start)

6

3

Contact rating is

 

10 Ampere at 120VAC

 

or 28VDC Gold plated

Figure 1

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.

Figure 2 shows location of engine start connections for Bypass Isolation Transfer Switch. Figure 5 (pg.6) shows location of engine start connections for Automatic Transfer Switch.

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.

Figure 2 (Typical)

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 3.

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 Source 1 line terminals.

6.Close Source 2 circuit breaker.

7.Start the generator’s engine.

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’s 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.

g GE Zenith Controls

SERIAL NUMBER:

 

RATING: VOLTS -

 

HZ -

AMPS -

PHASE -

SYSTEM VOLTS:

 

MODEL NUMBER:

 

 

Figure 3

CAUTIONS

Certain accessories, per specific

schematics, can inhibit automatic transfer.

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

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Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)

GE Zenith Controls ■

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Contents GE Zenith Controls Table of Contents Authorized ServiceIntroduction Equipment Inspection and Storage Safety / InstallationFinal Equipment Inspection Engine Start Control Connections Installation cont’dInitial Energization Initial Energization cont’d R E T E S TInstallation cont’d Entelli-Switch 250 Controller Entelli-Switch 250 ControllerEntelli-Switch 250 Controller cont’d LCD & KeypadUser Setting for Voltage & Frequency Accessory Group Packages Stds Exes Cons Sens Spes PsgsA62 Accessory DefinitionsCalibrate Accessory Definitions cont’d Approximate out of phase degrees S12PS13P S14How to Set the System Clock Press More and scroll to SET System Clock using the More keyCDT One Event Timer Exerciser Press Exer Cancl Press Start Timer TestPress Bypass Exer Press Cancl BpassCDP Clock Exerciser Load / No-Load Clock ExerciserEntelli-Switch 250 User Setup CFG Menu Turn options on or OFF via keypad through the CFG menuEntelli-Switch 250 User Setup SET Menu Change adjustable values through the SET menuEntelli-Switch 250 User Setup System Info View System DataTesting IntroductionTest Options Auto PositionTesting cont’d ATS TestingDelayed Transition Standard TransitionInitiating a Closed Transition Closed TransitionRe-Transfer with Closed Transition Auto Location Emergency Service Procedure for Extended Parallel TimeTest Location Sequence of Operation ATS TypeSequence of Operation cont’d Amp Molded Power Section Transformer Usage see Figure Relay/Transformer R/T BoxDelayed / Closed Transition Relay/Transformer R/T Box cont’dStandard Transition R/T Box Schematic Delayed / Closed Transition R/T Box SchematicTroubleshooting and Diagnostics General TroubleshootingMaintenance and Testing Inspection and CleaningTesting ServicingPage GE Zenith Controls
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