STOP 1915704 - Caterpillar

Caterpillar Digital Voltage Regulator (Cat DVR)
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.
Illustration 1 g01115009The Caterpillar Digital Voltage Regulator Cat DVR 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 a multiple pole, high frequency, permanent magnet generator, from the generator output (shunt excitation), or from auxiliary windings that are included on some generators. 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 functionsAdjusting 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.