Genuine Stamford AVR Card AS440

Genuine Stamford AS440 AVR Card

General Description

AS440 is a half wave phase controlled thyristor type AVR
and forms part of the excitation system for a brush-less
generator. The design employs Surface Mount Technology
(SMT) for high integration of features in a small footprint
AVR.

Technical Specification

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.

UNDER FREQUENCY PROTECTION
Set point 94 -98% Hz

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 +70C
Relative Humidity 0-70C 95%
Storage temperature -55 to +80C

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