Eaton RTC-100 Instruction Manual

Contents

6Instruction Booklet IB 70-8698 Instruction Manual for the Eaton RTC-100Automatic Transfer Switch Controllereaton Corporation www.eaton.comEffective December 20092.7 Specification SummaryTable 1. RTC-100 Controller Specificationsinput voltage 240 vac 50/60 hzVoltage Measurements of Utility GeneratorVoltage Measurement Range 0 to 300 Vac RMS (50/60 Hz)Voltage Measurement Accuracy ± 6 VacUndervoltage Dropout 70% of the Nominal 240 Vac Input VoltageUndervoltage Pickup 80% of the Nominal 240 Vac Input VoltageOperating Temperature Range -20 to +70°C (-4 to +158°F)Storage Temperature Range -30 to +85°C (-22 to +185°F)Operating Humidity 0 to 95% Relative Humidity (Non-condensing)Operating Environment Resistant to Ammonia, Methane, Nitrogen, Hydrogen,and HydrocarbonsUtility Close and Gen Close Outputs 5 amps @ 250 Vac5 amps @ 30 VdcLoad Shed Contacts #1 and #2 5 amps @ 250 Vac5 amps @ 30 Vdc1Applicable Testing UL Recognized ComponentUL 991 HumidityIEC 61000-4-2, 61000-4-3, 61000-4-4, 61000-4-5,61000-4-6, 61000-4-11, 61000-3-2, 61000-3-3CISPR 11, Class BFCC Part 15, Class BEngine Start Contacts 5 amps @ 250 Vac5 amps @ 30 VdcSection 3: operation3.1 GeneralThis section specifically describes the operation and functional useof the RTC-100 controller. The practical use of and operation withineach category will be discussed. In this section, it is assumed thatprior sections of this manual were reviewed and that the operatorhas a basic understanding of the hardware.The RTC-100 controller provides for automatic transfer and re-trans-fer from source to source. It provides a summary of the RTC-100controller intelligence and supervisory circuits that constantly moni-tor the condition of both the Utility and Generator power sources,thus providing the required intelligence for transfer operations.These circuits, for example, automatically initiate an immediatetransfer of power when the power fails or the voltage level dropsbelow a preset value and an alternate source of power is available.3.2 Operating Voltage and MeasurementsThe RTC-100 controller operates on an input voltage of 240 Vac withselectable frequency settings of 50 or 60 Hz.The RTC-100 controller operates directly from the line sensing inputsof the Utility and Generator power sources.All voltage monitoring and measurements are true RMS measure-ments.3.3 Typical Transfer OperationA typical transfer request will begin with a Utility outage (Utility volt-age falls below the 70% dropout level).When the Generator source meets the requirements to be consid-ered available, the TDNE (Time Delay Normal to Emergency) timerwill start timing. TDNE is jumper-programmable at either 20 secondsor 50 seconds. The 50 second setting may be used to allow for alonger warm-up period of the Generator. After TDNE times out, theUtility Close Outputs will open, the Gen Close Outputs will close,and the Load Shed Contacts will open. This will connect the load tothe Generator source but any loads wired to the Load Shed Contactswill be disconnected.When the Utility becomes available (Utility voltage is above the 80%pickup level), the TDEN (Time Delay Emergency to Normal) timer willstart timing. TDEN is a fixed delay of 10 seconds. After TDEN timesout, the Gen Close Outputs will open, the Utility Close Outputs willclose, and the Load Shed Contacts will be closed. This will connectall loads to the Utility source.If used with two wire start generators, a time delay engine start(TDES) will time down when utility voltage is below the 70% drop-out. This time delay of 6 seconds allows the utility to return to nor-mal before the generator is started. A time delay engine cool (TDEC)timer will time out after the transfer switch transfers load back to theutility This timer allows the generator to properly cool down beforeit is shut down. The timer allows the generator to run unloaded for 5minutes.