Caterpillar VR6

Voltage Regulator

The Caterpillar VR6 voltage regulator is a widely used AVR (automatic voltage regulator) produced by the world famous Caterpillar brand.

Used with both Self-Excited (SE) and Permanent Magnet Excited (PME) generators.

Features

  • Power on Shunt Excited Input: 180-280 Vac, 50/60 Hz, 1 or 3 phase
  • Power on PMG Excited input 63-105 Vac 100-240 Hz 3 phase
  • Sensing input: 180-280 Vac, 50/60 Hz 1 or 3 phase
  • CT input: 1 or 5 Aac 50/60 Hz
  • ACC input: +/- 3 Vdc. Output 65 Vdc @ 12 Adc
  • Unit Type: Potted – Rugged
  • Weight: 1.5 kg
  • Size: 9.4 in x 7.1 in x 3.5 in
  • 4 mounting holes

Specifications…

Output Power (with 240 Vac Input) 12 Adc @ 65 Vdc maximum continuous
25 Adc @ 125 Vdc forcing for 10 seconds
AC Input Power 100 to 280 Vac, single-phase 50 to 400 Hz
or 63 to 105 Vac; three phase, 50 to 400 Hz,
1092 VA maximum continuous burden
AC Sensing Voltage 180 to 280 Vac, 50/60 Hz; single or three phase
External Voltage Adjust Rheostat 10k ohm, 2W, potentiometer
Regulation accuracy +/- 0.5% Average responding
Voltage Drift +/- 1% voltage variation for a 40°C (104 °F) change
Response Time < 4 milliseconds
Frequency Compensation 1 or 2 V/Hz jumper selectable with knee
adjustable from 45 Hz to 65 Hz
EMI Suppression Internal Filter
Voltage Build-Up Internal provisions for automatic
voltage build-up frmo generator
residual voltages as low as 6 Vac
Over Excitation Shutdown Over excitation protection starts
timing at 90Vdc +/- 5% and takes
the output to zero in greater than
30 seconds. The output can be 125
Vdc for greater than 10 seconds.
Droop 1 A or 5 A, < 10 VA, adjustable
from 0 to 10% at rated input current, 0.8
power factor.

 

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Author: mavinelectric

Electrical Engineering Contractor