Stamford AVR MX341 Generator Automatic Voltage Regulator

 

Technical specification

 

SENSING INPUT

  Voltage     190-264V ac max, 1 phase, 2 wire

  Frequency   50-60 Hz nominal

 

POWER INPUT (PMG)

  Voltage     140-220V ac max, 3 phase, 3 wire

 Current     3A/phase

 Frequency   100-120 Hz nominal 

OUTPUT

  Voltage     max 120V dc

  Current     continuous 2.7 A

             Intermittent 6A for 10 secs.

  Resistance  15 ohms minimum

 

REGULATION

  +/- 1% (see note 1) 

 

THERMAL DRIFT

 0.03% per oC  change in AVR ambient (note 2)

 

SOFT START RAMP TIME

 3 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 1 k ohm 1 watt trimmer (see note 3)

 

UNDER FREQUENCY PROTECTION

  Set point   95% Hz (see note 4)

  Slope      170% down to 30 Hz

 

UNIT POWER DISSIPATION

  12 watts maximum

 

ANALOGUE INPUT

  Maximum input   +/- 5V dc (see note 5)

  Sensitivity        1v for 5% G enerator 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 seconds (fixed)

 

ENVIRONMENTAL

  Vibration   20-100 Hz   50mm/sec

            100Hz – 2kHz   3.3g

  Operating temperature     -40 to +70oC 

  Relative Humidity 0-70oC   95% (see note 6)

  Storage temperature       -55 to +80oC 

 

NOTES

1.  With 4% engine governing.

2.  After 10 minutes.

3.  Applies to Mod status D onwards. Generator de-rate may apply. Check with factory.

4.  Factory set, semi-sealed, jumper selectable.

5.  Any device connected to the analogue input must be fully floating (galvanically isolated from ground), with an insulation strength of 500V ac.

MX341