Cat Digital Voltage Regulator (CDVR)
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The Cat Digital Voltage Regulator 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. |
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Typical CDVR | |
The Cat Digital Voltage Regulator is a microprocessor-based voltage regulator. Control power for the Cat DVR is supplied from an external source of 24 VDC. The power stage of the Cat DVR can be supplied from the following: a multiple pole, high frequency, permanent magnet generator, generator output (shunt excitation) and auxiliary windings. Connections to the Cat DVR are made through three connectors. The communication between the Cat DVR and the service tool is accomplished by using a CANBUS protocol.
The Cat DVR has the following features:
- Three control modes:
- Automatic voltage regulation (AVR)
- Power factor (PF) regulation
- Reactive power (VAR) regulation
- Programmable stability settings
- Soft start control with an adjustable time setting in AVR mode
- Dual slope voltage versus frequency (V/Hz) characteristic
- Three-phase voltage sensing or single-phase voltage sensing
- Single-phase current sensing
- Field current sensing and field voltage sensing
- Ten protection functions
Adjusting the Caterpillar Digital Voltage Regulator (Cat DVR)
In order to view the parameters and configure the parameters of the Cat DVR, a PC with the Caterpillar PC software is required.
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Caterpillar Digital Voltage Regulator (CDVR)" for complete information.