AS480

The AS480 is a haf wave phase controlled AVR which forms part of the excitation system of the brushless generator. The design employs Surface Mount Technology (SMT), custom mouldings and heatsinks to produce a compact AVR assembly. The AVR also incorporates an interface to the optional Excitation Boost System (EBS) for use where short-circuit current maintenance is required.

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Description

SENSING and POWER INPUT

Voltage: 100-264 V ac 1 phase

Frequency: 50-60 Hz nominal

OUTPUT

Voltage: 82 V d.c. @ 200 Va.c power input.

Voltage: 45 V d.c. @ 110 Va.c power input.

Current: Continuous 5A     |     transient 7.5A for 10 secs.

Resistance: 15 ohms min

REGULATION: +/- 1.0%

THERMAL DRIFT: 0.03% per deg. C change in AVR ambient (see note 3)

TYPICAL SYSTEM RESPONSE

AVR response: 20ms

Field current to 90%: 80 ms

Machine Volts to 97%: 300ms

EXTERNAL VOLTAGE ADJUSTMENT: +/-10% with 1 k ohm 1 watt trimmer

Increasing resistance lowers voltage.

Fixed 15kOhm resistor enables 110V sensing
UNDER FREQUENCY PROTECTION

Set point: 94-98% Hz
UNIT POWER DISSIPATION: 12 watts maximum
BUILD UP VOLTAGE: 4 Volts @ AVR terminals

 

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: 67 Vdc +/-3% (fixed)

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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