MX321

MX321 is a three phase sensed Automatic Voltage Regulator and fors part of the excitation system for a brushless generator. Excitation power is derived from a three-phase permanent magnet generator (PMG), to isolate the AVR control circuits from the effects of non-linear loads and to reduce radio frequency interference on the generator terminals. Sustained generator short circuit current is another feature of the PMG system.

Category:

Description

SENSING INPUT

Voltage: 190-264V ac max, 2 or 3 phase

Frequency: 50-60 Hz nominal

 

POWER INPUT (PMG)

Voltage: 170-220V ac max, 3 phase, 3 wire

Current: 3A/phase

Frequency: 100-120 Hz nominal

 

OUTPUT

Voltage: Max 120V dc

Current: Continuous 3.7 A    |     Intermittent 6A for 10 secs.

Resistance: 15 ohms minimum

 

REGULATION: +/- 0.5% RMS with 4% engine governing

 

THERMAL DRIFT: 0.02% per deg. C change in AVR ambient

 

SOFT START RAMP TIME: 0.4 – 4 seconds

 

TYPICAL SYSTEM RESPONSE

AVR response: 10 ms

Filed current to 90%:  80 ms

 Machine Volts to 97%: 300 ms

 

EXTERNAL VOLTAGE ADJUSTMENT: +/-10% with 5 k ohm 1 watt trimmer

 

UNDER FREQUENCY PROTECTION

Set point: 95% Hz

Slope: 100-300% down to 30 Hz

Max. Dwell:    20% volts/S recovery

 

UNIT POWER DISSIPATION: 18 watts maximum

 

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: 0.22 A for 5% droop 0PF

Max input:  0.33 A

 

CURRENT LIMIT INPUT: 10 ohms burden

Sensitivity range: 0.5 – 1A

 

OVER VOLTAGE DETECTOR INPUT

Set point: 300v.

Time delay: 1 Sec (fixed)

CB trip coil volts: 10-30 vdc

CB trip coil resistance: 20-60 ohms

 

OVER EXCITATION PROTECTION

Set point: 75 V dc

Time delay: 8-15 seconds (fixed)

 

ENVIRONMENTAL

Vibration: 20-100 Hz 50mm/sec     |     100Hz – 2kHz 3.3g

Operating temperature: -40 to +700C

Relative Humidity: 0-700C 95%

Storage temperature: -55 to +800C

Reviews

There are no reviews yet.

Be the first to review “MX321”

Your email address will not be published. Required fields are marked *