KRS440B AVR Automatic Voltage Regulator Compatible with SX440 AS440 Brushless Diesel Generator Stabilizer
3 Phase Generater30kva Automatic Voltage Regulator AVR KRS440B is a half-wave phase-controlled thyristor type Automatic Voltage Regulator and forms part of the excitation system for a brushless generator.
In addition to regulating the generator voltage, the AVR circuitry includes under speed and sensing loss protection to ensure safe, reliable control of the generator. Positive voltage build-up from residual levels is ensured by the use of proficient semiconductors in the power circuitry of the AVR. Which is linked with the main stator windings and the exciter field windings to offer closed-loop control of the output voltage with load regulations of +/- 1.5%.
Details
Product Name
KRS440B
SENSING/POWER INPUT
Voltage
170-264Vac,352-528Vac
MAGNETIC FIELD OUTPUT
Voltage
Max. 82 Vdc @200 Vac input
Current
Continuous 4A, Trancient 7.5A for 10 seconds
PRESSURE REGULATING ACCURACY
<+/-1%RMS with 4% engine governing
Key Features
- High precision voltage regulation accuracy up to ±1%, ensuring stable power output
- Dual frequency mode: 50Hz / 60Hz optional by jumper setting
- Dual voltage detection range: 170–264VAC / 352–528VAC
- Built-in under frequency protection and over-excitation protection
- Support generator parallel operation with 5% droop function
- Low residual magnetism starting voltage, easy self-excitation and fast voltage build-up
- Advanced SMT manufacturing process, anti-interference and temperature resistant
- Compatible replacement for SX440, AS440 generator AVR modules
Technical Specifications
- Sensing Input Voltage: 170~264VAC / 352~528VAC (switchable)
- Working Frequency: 50Hz / 60Hz adjustable
- Power Supply Input: 100~264V AC
- Maximum Excitation Voltage: 82VDC (at 200VAC input)
- Continuous Excitation Current: 4A DC
- Peak Excitation Current: 7.5A DC (10 seconds)
- Voltage Regulation Precision: ±1%
- Under Frequency Protection Range: 92%–94% rated frequency
- Remote Voltage Adjustment: ±10% with external 1KΩ potentiometer
Application
Ideal for brushless diesel generator sets, open-frame generators, silent generator units, and industrial power generation equipment. Perfect aftermarket replacement part for Stanford and Marathon series generators.
