AVR AS440 Automatic Voltage Regulator for Stamford Diesel Generator

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Description

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%.

Details

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
UNDER FREQUENCY PROTECTION
Set point: 94 -98% Hz
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.

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