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DANGER: Shock/Electrocution Hazard-Do not operate this equipment or work on this equipment unless you have read and understand the instructions and warnings in the Operation and Maintenance Manual. Failure to follow the instructions or heed the warnings will result in serious injury or death. |
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Personal injury or death can result from high voltage. When power generation equipment must be in operation to make tests and/or adjustments, high voltage and current are present. Improper test equipment can fail and present a high voltage shock hazard to its user. Make sure the testing equipment is designed for and correctly operated for high voltage and current tests being made. When servicing or repairing electric power generation equipment:
Failure to do so could result in personal injury or death. Make sure residual voltage in the rotor, stator and the generator is discharged. |
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Accidental engine starting can cause injury or death to personnel working on the equipment. To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system. Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on. |
The voltage regulator is located in the enclosure for the control panel.
The voltage regulator is powered by two auxiliary windings. These windings are independent from the circuit for detection of voltage. The first winding is labelled as "X1" and "X2". This winding has a voltage that is proportional with the output voltage of the generator. The second winding is labelled as "Z1" and "Z2". This winding has a voltage that is proportional to the current of the stator. The voltage from the power supply is rectified and filtered before being used by the regulator monitoring transistor. This principle ensures that regulation is not affected by interference that is generated by the load.
These voltage regulators may have an optional remote potentiometer for voltage adjustment. This potentiometer is 450 ohms 0.5 W minimum. The adjustment range is 5%. The voltage range is limited by the internal potentiometer "P2". Remove "ST4" in order to connect the potentiometer. A 1000 ohm potentiometer can also be used to extend the adjustment range.
- Turn the latch (2) for the door of the control panel and open the door (1).
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Illustration 2 g01178828 (3) Voltage regulator - Make adjustments to the voltage regulator (3), if necessary.
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| Illustration 1 | g01178812 |
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View of the control panel (1) Door for the control panel (2) Latch | |
| R230 Regulator | |
| Voltage regulation | ±0.5% |
| Voltage detection range | 85 to 139 V (50/60 Hz) |
| Rapid response time for a transient voltage variation amplitude of ±20% | 500 ms |
| Voltage setting | "P1" |
| Stability setting | "P2" |
| 8 Amp Fuse for protection of the power supply | 10 amperes for 10 seconds |
| 50 or 60 Hz selection with jumper "ST3"(1). | |
| Underspeed protection and adjustment of frequency threshold via potentiometer "P3" | |
| (1) | The engine speed setting must be changed in order to change the frequency of the generator set. |
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| Illustration 3 | g00952495 |
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R230 Voltage Regulator with components | |
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| Illustration 4 | g00952510 |
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R230 connections | |
Use the following procedure to adjust the R230 voltage regulator.
- Make sure that the ST3 wire is connected for 50 Hz applications. Remove the ST3 wire for 60 Hz applications.
- Turn potentiometer P1 to the full counterclockwise position.
- Turn the potentiometer ST4 to the middle of the total rotation for the potentiometer ,if equipped. Run the generator at the rated speed. If the voltage does not increase, the field may need to be energized. Refer to the "Special Use" section.
- Turn potentiometer P1 until the rated output voltage is obtained.
- Adjust the stability with potentiometer P2.
- The sealed potentiometer P3 is set at the factory for 50 Hz or 60 Hz.
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| Illustration 5 | g00952821 |
The exciter is switched off by disconnecting the power supply to the voltage regulator. The connection is identical for resetting the internal protection for the voltage regulator.
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| Illustration 6 | g00952830 |
Use a 12 VDC power source in order to energize the field, if necessary. Refer to the following table.
| Applications | B Volts | Time |
| Voltage build up | 12 (1A) | 1 - 2 seconds |
| De-energized parallel operation | 12 (1A) | 1 - 2 seconds |
| Standby parallel operation | 24 (2A) | 5 - 10 seconds |
| Battery starting | 48 (4A) | 5 - 10 seconds |
| Voltage that is sustained at overload | 48 (4A) | 5 - 10 seconds |