HEAD GP-CYL -UTN 20R1016 - Caterpillar

Initial Start-Up
Measure the insulation resistance of each winding if the generator was exposed to the following conditions:
Rapid changes in temperature
Freezing
Wet climate during shipment
Wet climate during storageRefer to this Operation and Maintenance Manual, "Insulation - Test".Note: These tests should be conducted prior to any power connections or control connections that are being made.Starting
Make all preliminary engine starting checks.
Be sure that the main circuit breaker or the line circuit breaker is open.
Start the engine. Allow the engine to warm up.
Adjust to the full load engine speed.
Close the main circuit breaker.
Apply the load. Do not try to apply the full load. Apply the load in increments to maintain system frequency at a constant level.
Readjust the governor for rated frequency.Adjust the Voltage
Adjust the voltage regulator to obtain the proper voltage. Refer to Operation and Maintenance Manual, "Voltage Regulators" for more information about the voltage regulator.
Turn the remote adjustment potentiometer to the center position, if equipped.
Connect an analog voltmeter that is calibrated for 50 VDC on terminal E+ and terminal E-.
Connect a voltmeter that is calibrated for 300 VAC to 500 VAC or 1000 VAC to the output terminals of the generator.
Make sure that the ST3 wire is positioned on the desired frequency. Also, the engine speed must be changed from the factory setting to change the frequency of the generator.
Turn voltage potentiometer (P2) to a full counterclockwise position.
Turn stability potentiometer (P3) counterclockwise to about 1/3 of the total rotation for the potentiometer.
Start the engine and set the engine speed to a frequency of 48 Hz for 50 Hz or 58 Hz for 60 Hz.
Adjust the output voltage to the correct value with potentiometer P2. This voltage should be the rated voltage UN for single operation or UN plus 2% to 4% for parallel operation with a current transformer. Use potentiometer P3 to make adjustments if the voltage oscillates. Adjust potentiometer P3 in both directions while you observe the voltage between E+ and E-. The voltage between E+ and E- should be approximately 10 VDC. The best response times are obtained at the limit of the instability. Try cutting or replacing the wire ST2 if no stable position can be obtained.
Check the LAM operation. ST5 must be closed.IVR
Voltage adjustments are categorized into two types: Manual biasing and Analog biasing.Manual voltage adjustment includes fine-tuning the generator output voltage via digital input, EMCP display, or SCADA (Modbus).Analog voltage adjustment is performed via programmable analog inputs to the EMCP and provide a voltage control interface for external potentiometers or external control systems (such as switchgear).For detailed information regarding voltage adjustment via IVR, refer toApplication and Installation, LEBE0006 and Application and Installation, LEBE0007Stopping
Remove the load in increments.
Open the circuit breaker.
Allow the engine to run for five minutes to cool.
Stop the engine.