Caterpillar — Adjustments for Generators in Parallel Operation
Adjustments · Voltage regulator R448
From a Caterpillar owner's manual covering: 3456, C1G1-Up, C2T1-Up, C3G1-Up, C4G1-Up, SR4B. Check it applies to your exact model before use.
Applies to: Caterpillar SR4B
Procedure
- Connect current transformer to S1 and S2 of J2.
- Set P1 quadrature droop to center.
- Apply rated load; voltage should drop 2 to 3%.
- Set no-load voltages identical for all generators.
- Connect generators in parallel and adjust speed for 0 kW exchange.
- Minimize circulating currents with P2 or Rhe.
- Apply available load; equalize kW by altering speed.
- Alter P1 to equalize currents.
Specs & values
- Voltage drop 2% to 3%
Full service-parts list: Caterpillar SR4B →
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.