tCLOVER MX341 Brushless Alternator AVR for Stamford Generator
MX341 Permanent Magnet Generator type voltage regulator is a compatible replacement for Newage Stamford MX341 and Onan 305-0846.
MX341 is 2 phase sensed Automatic Voltage Regulator and forms part of the excitation system for a brushless generator.Excitation power is derived from a three phased permanent magnet generator(PMG),to isolate the AVR control circuits from the effects of nonlinear loads and to reguce radio frequency interence on the generator terminals.Sustained generator short circuit current is another feature of the PMG system.
The AVR sense the voltage in the main generator winding and controls the excitation to maintain the generator output voltage with the specified limits,compensating for load,speed,temperature and power factor of the generator.Thress phase RMS sensing is emplyed for superior voltage regulation.
Adjustable soft start circuitry is included to provide a smooth controlled build up of generator output voltage.
Voltage Regulation < u00b11%t
3 Phase PMG Power Inputt
For Use In Parallel Operationt
Adjustable EXC TRIP, DIP, TRIM & DROOP Functionst
Soft Start Voltage Rampingt
Under Frequency Roll Off Protectiont
UFRO & Over Excitation LED Indicatorst
Sensing InputttVoltage 190~264 VAC 1 phase 2 wire
Frequency 50/60 Hz selectablet
Power Input(PMG)ttVoltage 170~220 VAC 3 phase 3 wire
Current 3A / phase
Frequency 100~120 Hz nominalt
OutputttVoltage Max. 120 VDC
Current Continuous 2.7A, Intermittent 6A for 10 sec.
Resistance Min. 15 Ohmt
Voltage Regulationtt< u00b11% (with 4% engine governing)t
Voltage Build-upttResidual volts at AVR terminal > 5 VACt
External Volts Adjustmentttu00b110% with 1 K Ohm 1 watt trimmert
Unit Power DissipationttMax. 12 wattt
Thermal Drifttt0.05% per u00b0C change in AVR ambientt
Soft Start Ramp Timett3 sec.t
Analogue InputttMax. input u00b15 VDC
Sensitivity 1V for 5% generator volts
Input Resistance 1 K Ohmt
Droop InputttBurden 10 Ohm
Max. sensitivity 0.07A for 5% droop (PF=0)
Max. input 0.33At
Under Frequency Protection
(Factory Setting)ttSet point 95% Hz
Slope 170% down to 30 Hzt
Current Limit InputttBurden 10 Ohm
Sensitivity Range 0.5~1At
Over Voltage Detector InputttSet point 300V
Time delay 1 sec. (fixed)
CB trip coil volts 10~30 VDC / 0.5 Ampt
Over Excitation ProtectionttSet point 90 VDC
Time delay 10 sec. (fixed)t
EnvironmentttOperating Temperature : -40~70 u00b0C
Storage Temperature : -40~85 u00b0C
Relative Humidity : Maximum 95%
Vibration : 3.3G @ 100~2 KHzt
AVR Controls FunctionsttVOLT : Voltage Adjustment
STAB : Stability Adjustment
U/F : UFRO Knee point Set
DROOP : Droop Adjustment
TRIM : Analogue Input Adjustment
EXC TRIP : Over Excitation Level Set
DIP : U/V Rate Sett
Dimensionstt150.0 (L) x 135.0 (W) x 48.0 (H) mmt
Product Specification / Models
Application / Models
Stamford rushless alternator
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Main products includes AVR, Generator Controller, Pump Pressure Controller, Bridge Rectifier, Capacitor, Centrifugal Switch.
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