MX321 SX440 SX460 Stamford/Leroysomer/Kanpor AVR (Automatical
voltage regulator) for brushless alterantor Product
Description SX460 is a half-wave phase-
controlled thyristor type Automatic Voltage Regulator and forms part of the excitation system for a brushless generator. In addition to regulating the generator voltage, the AVR circuitry includes under speed and sensing loss protection to ensure safe, reliable control of the generator. Positive voltage build up from residual levels is ensured by the use of proficient semiconductors in the power circuitry of the AVR. Which is linked with the main stator windings and the exciter field windings to offer closed loop control of the output voltage with load regulations of +/- 1.5%Stability adjustment Under frequency roll off adjustment SX460Input Voltage Jumper
selectable 95-132V ac or 190-264V
ac Frequency 50-60 Hz
nominal Phase1Output Voltage Max 90V dc at 207V ac
input Current Continuous 4A dc, intermittent 6A for 10
secs Resistance 15 ohms
minimum Regulation +/- 1.0% Thermal
Drift 0.05% per deg. C change in AVR ambient Typical
system response AVR response 20ms Filed current to
90% 80 ms Machine Volts to 97% 300ms 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 10 watts maximum Build
up voltage 4 Volts @ AVR
terminalsEnvironmental Vibration 20-100
Hz,50mm/se 100Hz - 2kHz, 3.3g Operating
temperature -40 to +70 Deg. C Relative Humidity 0-70
Deg. C95% Storage temperature -55 to +80 Deg.
C*Quadrature droop adjustment*AVR Voltage adjustment*Stability
adjustment*LAM Threshold (underspeed) adjustment*Excitation ceiling
adjustment*Selection of single phase or three phase**voltage
sensing*Selection of normal or rapid response time*50 Hz or 60 Hz
frequency option*Remote voltage adjustment option*LAM
enable/disable option*Alternator frame selection*Excitation system
selectionSpecificaionInput voltage: 70-140V AC, (PMG, or
auxiliary winding, single, three phases)Reaction is measured :
90-480V ACMAX. output :DC 10A 125VFunction: Built-in low-speed ,
over excitationLAM, REGULATION: +/-0.5% Product
Description *3 Phase Sensing Permanent Magnet Generator type
voltage regulator is a compatible replacement for Newage MX321 and
Onan 305-0823.* MX321 is a three 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. 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 Staret Ramp Time 0.4 - 4
seconds Typical system response AVR
response 20ms Filed current to 90% 80
ms Machine Volts to 97% 300ms External voltage
adjustment +/-10% with 5k 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:
0.33A Environmental Vibration 20-100
Hz,50mm/se 100Hz - 2kHz, 3.3g Operating
temperature -40 to +70 Deg. C Relative Humidity 0-70
Deg. C95% Storage temperature -55 to +80 Deg.
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