Kohler Understanding ATS Control Sequence and Time Delays for Generators
Page 26

2.7.2ATS Control Sequence of Operation

See Figure 2-8 for time delay settings.

Preferred Source Fails:

1.The load control contact opens.

2.The engine start time delay times out.

3.The generator set is signaled to start.

4.The generator starts and the emergency source becomes available.

5.The normal-to-emergency time delay times out.

6.The transfer switch transfers to the emergency source.

7.The load control contact time delay times out.

8.The load control contact closes.

Normal Source Returns:

1.The emergency-to-normal time delay times out.

2.The contactor transfers to the normal source.

3.The engine cooldown time delay times out.

4.The generator is signaled to stop.

2.7.3Time Delays

Time delays are factory-set to the values shown in Figure 2-8. An authorized distributor/dealer can adjust time delays using a personal computer and Kohlerr SiteTecht software.

Time delays described in this section operate only when the controller is connected to a Kohlerr Model RXT transfer switch.

The engine start and load transfer time delays prevent engine start and load transfer caused by brief variations in the utility power source.

2.7.4ATS Load Control Relay Time Delay

The load control time delay allows delayed starting of large motor loads (such as air conditioners), preventing simultaneous starting of large motors after transfer to the generator set. The load control time delay is fixed at 5 minutes. It is not adjustable.

The load must be connected to the load control output on the interface board of the Model RXT transfer switch. See the transfer switch operation and installation manual for connection instructions.

Time Delay

Setting

Description

 

 

 

Engine Start

3 seconds

Time delay after utility source is lost until the engine start cycle begins.

 

 

Guards against starting the generator set because of a brief change in

 

 

the utility source.

 

 

 

Transfer, Normal to Emergency

3 seconds

Time delay after emergency source becomes available until transfer to

 

 

emergency source.

 

 

 

Transfer, Emergency to Normal

2 minutes

Time delay after the utility source returns until transfer back to normal.

 

 

Ensures that the the utility source is stable before transferring from the

 

 

emergency source.

 

 

 

Load Control

5 minutes

See Section 2.7.4. Allows delayed connection of selected loads to the

 

 

generator set to prevent simultaneous starting of large motors after

 

 

transfer to the emergency source. Recommended for delayed starting

 

 

of air conditioners.

Figure 2-8 Time Delays

 

 

26 Section 2 Generator Set Operation

TP-6810 11/13

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Contents RDC2 TP-6810 11/13bController Identification Accessory Number Accessory DescriptionProduct Identification Information Generator Set Identification NumbersTable of Contents Appendix a Abbreviations Scheduled MaintenanceTroubleshooting Accidental Starting Safety Precautions and InstructionsBattery Accidental starting Can cause severe injury or deathFuel System Engine Backfire/Flash FireExhaust System Hazardous voltage Will cause severe injury or death Hazardous NoiseHazardous noise Can cause hearing loss Hot coolant and steam Can cause severe injury or death Heavy EquipmentHot Parts Introduction NameplateList of Related Literature Literature Type Part NumberService Assistance Service Assistance TP-6810 11/13 Service Views NON-SERVICE Side260RCL Service Views Operating Area Prestart ChecklistGenerator Set Operation Keep the generator set area clear. Maintain at leastExercising the Generator Set Generator Set OperationSystem Diagnostics Automatic Operation with Model RDT or RSB Transfer SwitchesUnloaded Cycle Exercise with Complete System Diagnostics ExerciseSetting the Exerciser at Power-up Power Failure During ExerciseExerciser Reset Unloaded Full-Speed ExerciseChanging the Exercise Setting Procedure to Change the Exercise Setting2RDC2 Main Menu 3Procedure to Set the Exerciser ATS Communication Errors FaultsResetting the Controller after a Fault Shutdown Procedure to Reset the Controller after a Fault ShutdownFault Shutdown SD Condition Check 5Controller Fault Messages Setting Model RXT Transfer Switch OperationProcedure to View Event History Event LogATS Control Sequence of Operation Time DelaysATS Load Control Relay Time Delay Preferred Source FailsControls and Indicators RDC2 Controller OperationButton Function Controller Keypad LED IndicatorsButton LED OperationLCD Display Active AlertChanging Settings Controller PowerBattery Charging Procedure to Change SettingsChanging Settings on the RDC2 Controller 6Changing SettingsController Menus Main MenuOverview Menu Engine Metering MenuGenerator Metering Menu Voltage CalibrationGenerator Set Information Menu Genset Run Time MenuAdjusting the Display Contrast Voltage Regulator VR Voltage AdjustSetting the Exerciser Genset System MenuATS Status Menu 14ATS Status Menu, with CalibrationATS Configuration Menu Changing ATS Configuration SettingsDate and Time Menu Date and Time 02Dec2011 1234pm Time Format 12hr24hrNetworking Information Menus 17Networking Information MenuNetworking Status Submenu DhcpNetworking Configuration Submenu OnCue Password OnCue PasswordRbus Information Submenu 20RBUS Information SubmenuRemote Devices Submenu 21Remote Devices SubmenuProgrammable Interface Module PIM Menus Load Control Menus 23Load Control Status MenuScheduled Maintenance General MaintenanceService Schedule Every Operation DailyOil Check Oil SpecificationsLubrication System Oil AdditionsAir Cleaner Service Procedure Air CleanerReset the maintenance timer on the RDC2 Check for leaksExhaust System Inspection Points Cooling SystemChecking and Filling Coolant Cooling System Inspection Flushing and CleaningFlushing and Cleaning Procedure Draining Cooling SystemIgnition System Model Spark plug gap 38 RCL, 48RCL, and 60RCL511 Storage Procedure Scheduled Maintenance TP-6810 11/13 Introduction TroubleshootingFault Messages USB PortGenerator Set Troubleshooting Problem Possible Cause Corrective ActionController Troubleshooting 2RDC2 Troubleshooting ChartTroubleshooting TP-6810 11/13 Appendix a Abbreviations AnsiLCB Page 2012, 2013 by Kohler Co. All rights reserved

38RCL, 48RCL, 60RCL specifications

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