Stamford Automatic Voltage Regulator - AVR MX341
- Stamford
- UK
- 7 days
- 1000 sets
The MX341 is an analogue, 2-phase sensing, permanent magnet generator (PMG) powered automatic voltage regulator (AVR) providing isolation from the effects of non-linear loads. It has improved motor starting performance and sustained short circuit current.
The MX341 is provided as standard for the STAMFORD P6, STAMFORD P7 and STAMFORD S7 alternators.
The MX341 is an analogue, 2-phase sensing, permanent magnet generator (PMG) powered automatic voltage regulator (AVR) providing isolation from the effects of non-linear loads. It has improved motor starting performance and sustained short circuit current.
The MX341 is provided as standard for the STAMFORD P6, STAMFORD P7 and STAMFORD S7 alternators.
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%
THERMAL DRIFT
0.03% per deg. C change in AVR ambient
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
UNDER FREQUENCY PROTECTION
Set point: 95% Hz
Slope 170% down to 30 Hz
UNIT POWER DISSIPATION
12 watts maximum
ANALOGUE INPUT
Maximum input +/- 5V dc
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 seconds (fixed)
ENVIRONMENTAL
Vibration: 20-100 Hz 50mm/sec
100Hz – 2kHz 3.3g
Operating temperature: -40 to +70°C
Relative Humidity: 0-70°C 95%
Storage temperature: -55 to +80°C
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;
6) Non condensing.
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