GE Entelli-Switch 250 manual Sequence of Operation, ATS Type

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Sequence of Operation

Standard Transition

Source 1 Power Failure:

When Source 1 voltage or frequency has fallen below the preset "Fail" values, the controller initiates the Time Delay Source 2 Start Timer (Engine Start Timer "P") cycle. Upon completion of the (P) time delay, an Engine start Signal is sent to Source 2. When Source 2 voltage and frequency reach the preset "Restore" Values, the time delay to Source 2 Timer (W) begins its timing cycle to ensure voltage and frequency stabilization before transfer. A manual pushbutton BYPASS is provid- ed to bypass the "W" time delay if desired. After the (W) time delay, the CCE relay energizes the CE solenoid to close the transfer switch in to Source 2. The SE limit switch activates to de-energize the CCE relay.

Restoration of Source 1 Power:

When Source 1 power reach the preset "Restore" values, the controller initiates re-transfer to Source 1sequence.The delay to Source 1 Timer (T) begins its timing cycle to ensure voltage and frequency stabiliza- tion before retransfer. A manual pushbutton BYPASS is provided to bypass the "T" time delay if desired. After the (T) time delay, the CCN relay energizes the CN solenoid to retransfer the switch to Source 1. The SN limit switch activates to de-energize the CCN relay.

Immediately after re-transfer, the S2 Stop Delay Timer (Delay to Engine Stop "U") begins its cycle to allow Source 2 Engine to run unloaded. A manual pushbut- ton BYPASS is provided to bypass the "U" time delay if desired. Upon completion of the (U) timing cycle, the controller sends an Engine stop signal.

Delayed Transition

Source 1 Power Failure:

When Source 1 voltage or frequency has fallen below the preset "Fail" values, the controller initiates the Time Delay Source 2 Start (Engine Start Timer "P") cycle. Upon completion of the (P) time delay, an Engine start Signal is sent to Source 2. When Source 2 voltage and frequency reach the preset "Restore" values, the time delay to open Source 1 timer (W) begins its timing cycle to ensure voltage and frequency stabiliza- tion before re-transfer. A manual pushbutton BYPASS is provided to bypass the "W" time delay if desired. After the (W) time delay, the CCNO relay energizes the CNO solenoid to open the transfer switch out of Source 1 position. The time delay to Source 2 timer (DW) begins its timing cycle. After the (DW) time delay, the CCE relay energizes. The switch then completes transfer to Source 2 by energizing the CE solenoid. The SE limit switch activates to de-energize the CCE relay.

Restoration of Source 1 Power:

When Source 1 power reach the preset "Restore" values, the controller initiates re-transfer to Source 1 sequence.The delay to open Source 2 Timer (T) begins its timing cycle to ensure voltage and frequency stabi- lization before retransfer. A manual pushbutton BYPASS is provided to bypass the "T" time delay if desired. After the (T) time delay, the CCEO relay energizes the CEO solenoid to open the switch out of Source 2 position. The time delay to Source 1 timer (DT) begins its timing cycle. After the (DT) time delay, the CCN relay ener- gizes the CN solenoid to complete re-transfer of the switch to Source 1. The SN limit switch activates to de- energize the CCN relay.

Immediately after re-transfer, the S2 Stop Delay Timer (Delay to Engine Stop "U") begins its cycle to allow Source 2 Engine to run unloaded. A manual pushbut- ton BYPASS is provided to bypass the "U" time delay if desired. Upon completion of the (U) timing cycle, the controller sends an Engine stop signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Timer Designations as they appear in the SET menu

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ATS Type

P

 

W

 

DW

 

T

 

 

DT

U

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standard

Time Delay

Time Delay

 

 

 

Time Delay

 

 

 

 

S2 Stop

Transition

S2 Start

 

S2 Stable

 

 

 

S1 Stable

 

 

 

 

Delay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Delay/ Open

Time Delay

Time Delay

 

ATS Open

Time Delay

 

ATS Open

S2 Stop

Transition

S2 Start

 

S2 Stable

 

Time to S2

S1 Stable

 

Time to S1

Delay

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Source 1

Transfer to Source 2

 

Source 1

Transfer to Source 1

Engine

Fails

 

 

 

 

 

 

 

 

 

 

 

 

Cooldown

 

 

 

 

 

 

Returns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

GE Zenith Controls

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Contents GE Zenith Controls Authorized Service Table of ContentsIntroduction Safety / Installation Equipment Inspection and StorageFinal Equipment Inspection Installation cont’d Engine Start Control ConnectionsInitial 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 PsgsAccessory Definitions A62Calibrate 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 TransitionClosed Transition Initiating a Closed TransitionRe-Transfer with Closed Transition Emergency Service Procedure for Extended Parallel Time Auto LocationTest 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