AVR MX341

The MX341 AVR is a two phase sensed Automatic Voltage Regulator and forms part of the excitation system for a brush-less generator. Excitation power is derived from a three-phase permanent magnet generator (PMG), to isolate the AVR control circuits from the effects of nonlinear loads and to reduce radio frequency interference on the generator terminals. MX341 AVR E000-2412 to suit Stamford Newage Generator.

Technical Specification :

• SENSING INPUT

Voltage: 196-264V 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 3.7A dc(see note 1)

Intermittent 6A for 10 secs

Resistance: 15 ohms minimum

• Regulation: +/-0.5% RMS with 4% engine governing (see note 2)
• THERMAL DRIFT: 0.02% per deg.C change in AVR ambient(note 3)
• SOFT START RAMP TIME: 0.4-4 seconds
• TYPICAL SYSTEM RESPONSE

AVR response                 10ms

Filed current to 90%       80ms

Machine Volts to 97%    300ms

• EXTERNAL VOLTAGE ADJUSTMENT: +/-10% with 5 k ohm 1 watt trimmer(see note 4)
• UNDER FREQUENCY PROTECTION

Set point 95% Hz(see note 4)

Slope 100-300% down to 30 Hz

Mx. Dwell 20% volts/S recovery

• UNIT POWER DISSIPATION: 18 watts maximum
• ANALOGUE INPUT

Maximum input +/- 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: 0.5-1 A

• 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 75V dc

Time delay 8-15 seconds(fixed)

• ENVIRONMENTAL

Vibration 20-100 Hz 50mm/sec

100hz-2kHz 3.3g

Operation temperature -40-+70°C

Relative Humidity 0-70 °C   95%

Storage temperature: -55 to +80 °C

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