ALARM GP-TRAVEL 1831037 - Caterpillar

The secondary wires or terminals of the current transformer must be shorted together when they are disconnected from the equipment. If electrical current passes through the primary windings of a current transformer with the secondary wires or terminal disconnected, extremely high voltages may be generated on the secondary wires or terminals. Bodily contact with high voltage can result in serious injury or death.
Stop the genset.
For a 1 Amperes CT, verify that the connections are to terminals 5 and 6.
For a 5 Amperes CT, verify that the connections are to terminals 5a and 6.Note: For troubleshooting purposes, it is possible to operate the voltage regulator when the droop current transformer is disconnected. However, the secondary wires of the droop current transformer must be connected together.
Verify that the polarity connection of the droop current transformer is connected to terminal 6.Expected Result:The connections are correct.Results:
OK - The connections are correct. Proceed to test step 7.
Not OK - The connections are not correct or the connections are impossible to verify.Repair: Run an individual genset with a reactive load. If the voltage increases as the reactive load increases, the CT secondary is not connected properly. Stop the genset and reverse the lead connections. Stop.Test Step 7. VERIFY THE SENSING VOLTAGE
Make sure that the generator set is off.
Check the range of the sensing voltage at the secondary windings of the potential transformers. The sensing voltage range should lie between the following limits:
90 V to 140 V
Verify that sensing wires 20, 22, and 24 are connected correctly. Wire 20 should be connected to T3 phase. Wire 22 should be connected to T1 phase. Wire 24 should be connected to T2 phase.Expected Result:The sensing voltage is correct. The sensing wires are connected properly.Results:
OK - The sensing voltage is correct. The connections are correct. Proceed to test step 8.
Not OK - The sensing voltage is NOT correct and/or the sensing wires are NOT connected properly.Repair: Install a PT with correct ratios. Connect the sensing wires to correct terminals. Stop.Test Step 8. CHECK THE OUTPUT VOLTAGE
Dangerous voltages are present at both the generator and the system bus.Under no circumstances should any attempt be made to connect instrumentation to these points until you are certain all power is off.All instruments must be connected to the generator and the system bus through potential transformers, which provide a maximum of 600 volts to the instruments.Failure to follow instructions will result in death or serious injury.
Start the genset.
Run the genset at no load.
Read the output voltage from the control panel.Expected Result:The generator voltage is higher than the nominal voltage. The generator voltage is steady.Results:
OK - The generator voltage is still high but steady. Proceed to test step 9.
Not OK - The generator voltage oscillates. The voltage goes very high. Then, the voltage goes very low.Repair: Add the load to the genset. If the voltage still oscillates, turn off the genset in order to reset the voltage regulator. Start the genset again and run at no load. Add load to the generator. If