Table 2-2. Fault Indicators Function

Figure 2-5. Generator Set Controls and Instruments (Sheet 6 of 6)

Section IV. OPERATION UNDER USUAL CONDITIONS

TM-5-6115-545-12 Power Unit Utility Pack Gas Turbine Engine Driven (Air Research Model PPU85-5) Non-Winterized and (Air Research Model PPU85-4) Winterized Manual
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Table 2-2. Fault Indicators Function INDICATOR FUNCTION (Fig. 2-5) LOW OIL PRESSURE Lights if oil pressure drops below 20 ± 2 psi. COOLANT HIGH TEMP Lights if coolant temperature rises above 222 ± 3° F. OVERSPEED Lights if engine rpm reaches 2400 to 2450 rpm. NO FUEL Lights if fuel in day tank falls to level permitting only one minute of engine operation. SHORT CIRCUIT Lights if output reaches 425 ± 25% of rated current. OVER LOAD Lights if any phase current exceeds 110% of rated load. UNDER VOLT Lights (Class 1 sets only) instantaneously if output falls below 48 volts, or 6 ± 2 sec after output reaches 99 ± 4 volts. UNDER FREQ Lights on (Class 1 sets only) when output freq drops to: Mode I - 46 ± 1 Hz for 50 Hz operation, 55 ± 1 Hz for 60 Hz operation, Mode II - 370 ± 5 Hz for 400 Hz. REVERSE POWER Lights if power flow into set exceeds 20% of rated value. OVER VOLT Lights if output voltage rises above 153 ± 3 volts. Change 1 2-17

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