AVR AS440 Automatic Voltage Regulator for Stamford Diesel Generator

(4 customer reviews)


Availability: 12 in stock

Original Option
**Genuine Alternative:** This AVR AS440 is a high-quality aftermarket replacement for the original Stamford voltage regulator.

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The AVR AS440 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. The Propose employs surface mount technology (SMT) for high integration of features in a minute footprint AVR.

Positive voltage build up from residual levels is ensured by the use of proficient semiconductors in the power circuitry of the AVR. The control and voltage sensing circuits have separate terminals, allowing the excitation power to be resulting directly from the stator winding for necessary applications or from an auxiliary winding if sustained short circuit performance is essential. 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 +/- 1.0%.


AS440 Product Specification Download.pdf


SENSING INPUT: Voltage Jumper selectable 100-130 Vac 1 phase or 190-264 Vac 1 phase Frequency 50-60 Hz nominal
POWER INPUT: Voltage 100-264 V ac 1 phase Frequency 50-60 Hz nominal OUTPUT Voltage 82 V d. C. @ 200 V a. C. Current continuous 4A,Transient 7.5A for 10 secs. Resistance 15 ohms min (10 ohms min when input volts is less than 175 ac)
REGULATION: +/- 1.0%
THERMAL DRIFT: 0.03% per deg. C change in AVR ambient
TYPICAL SYSTEM RESPONSE: AVR response: 20 ms Filed current to 90%: 80 ms Machine Volts to 97%: 300 ms
EXTERNAL VOLTAGE ADJUSTMENT: +/-10% with 1 k ohm 1 watt trimmer Increasing resistance lowers voltage.
UNIT POWER DISSIPATION: 12 watts maximum
BUILD UP VOLTAGE: 4 Volts @ AVR terminals
ANALOGUE INPUT: Maximum input: +/- 5 Vdc Sensitivity: 1V for 5% Generator Volts (adjustable) Input resistance 1k ohm QUADRATURE DROOP INPUT: 10 ohms burden Max. Sensitivity: 0.07 A for 5% droop 0PF Max. Input: 0.33 A
OVER EXCITATION PROTECTION: Set point 75 V dc Time delay 10-15 seconds (fixed)
ENVIRONMENTAL: Vibration: 20-100 Hz 50mm/sec 100Hz -2kHz 3.3g Operating temperature: -40 to +70º C, Relative Humidity: 0-70º C 95% Storage temperature: -55 to +80º C
Package Includes: 1 x AVR AS440 Automatic Voltage Regulator. Find out more generator Automatic Voltage Regulator
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4 reviews for AVR AS440 Automatic Voltage Regulator for Stamford Diesel Generator

    April 10, 2023
    .The alternator voltage can be adjusted as it works very well. It is very suitable for large machines. In addition to regulating the generator voltage, the AVR circuit also has underspeed and induction loss protection to ensure safe control of the generator operation.
    March 10, 2023
    The product arrived in perfect condition. It has no other problems. And there is technical support. An engineer called me back the next day and told me what to do to use it better. Strong technical support allows me to purchase this type of product in large quantities with confidence. The unit appears to be well made with high quality materials.
    February 4, 2023
    I ordered this generator a week ago and it has now shipped. It was received in top condition and packaging, no tears, no dents, no crushing. The RL operator has done a fantastic job of taking care of my product and communicating with me. I have to say that I am very happy with the construction of the AVR AS440 Automatic Voltage Regulator for Stanford Diesel Generators, it is very sturdy and easy to assemble. The instructions are easy to read.
    January 28, 2023
    So happy with this 4000AVR AS440 Automatic Voltage Regulator for Stamford Diesel Generator! We ordered this automatic voltage regulator to install to our machine
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