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| Illustration 1 | g00779264 |
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VR6 Voltage Regulator (1) Stability adjustment | |
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| Illustration 2 | g01021519 |
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The Cat VR6 presents an electrical shock/electrocution hazard. This hazard will cause serious injury or death. Service by trained personnel only. The terminals and heat sinks are live at hazardous voltages when power is applied and for up to 8 minutes after power is removed. |
An oscilloscope or other voltage recording device should be used if an optimal stability setting is desired. Rotate stability adjustment (1) in the clockwise (CW) direction if you need to slow the response time. Rotate stability adjustment in the counterclockwise (CCW) direction if you need to speed the response time. If the adjustment is rotated too far in a CCW direction, the generator voltage may oscillate or the voltage may hunt.
Good response can be obtained with the following procedure:
- Start the generator.
- Run the generator at no load.
- Rotate stability adjustment (1) CW until the voltage becomes stable.
- Rotate stability adjustment (1) CCW until the system just begins to oscillate.
- Rotate stability adjustment (1) CW just past the point at which oscillation occurred.
Note: If the voltage remains stable when the adjustment is fully CCW, leave the adjustment fully CCW. This gives the fastest response to load changes.