Newage Stamford AS440

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

Positive voltage build up from residual levels is ensured by the use of efficient semiconductors in the power circuitry of the AVR. The power and voltage sensing circuits have separate terminals, allowing the excitation power to be derived directly from the stator winding for basic applications or from an auxiliary winding if sustained short circuit performance is required.

Please read the specification sheet for further 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 (see note 1).
transient 7.5A for 10 secs.
Resistance 15 ohms min
(10 ohms min when input
volts is less than 175 ac)
REGULATION +/- 1.0% (see note 2)
THERMAL DRIFT 0.03% per deg. C change in AVR ambient (see note 3)
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 (see note 4)
Increasing resistance lowers voltage.
UNDER FREQUENCY PROTECTION Set point 94 -98% Hz (see note 5)
UNIT POWER DISSIPATION 12 watts maximum
BUILD UP VOLTAGE 4 Volts @ AVR terminals
ANALOGUE INPUT Maximum input +/- 5 Vdc (see note 6)
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 (note 7)
Relative Humidity 0-70C 95% (note 8)
Storage temperature -55 to +80C
NOTES 1. De-rate by 12% if mounted in ‘portrait’ orientation.
2. With 4% engine governing.
3. After 2 minutes.
4. Generator de-rate may apply. Check with factory.
5. Factory set, semi-sealed, jumper selectable.
6. Any device connected to the analogue input must be fully floating (galvanically isolated from ground), with an insulation strength of 500V ac.
7. De-rate output current by 5% per degree C above 60C.
8. Non condensing.
Specification sheet Download
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