Description:

MX341 is a two phase sensed Automatic Voltage Regulator(AVR) and forms part of the exciation 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.sustained generator short circuit current is another feature of the PMG system.   The AVR senses the voltage in the main generator winding and control the power fed to the exciter stator and hance the main rotor to maintain the generator output  voltage within the specified limits,compensating for load sprrd,temperature and power factor of the generator The AVR has the faclity for droop CT connection,to allow parallel running with other similarly equipped generators.

Technical specification SENSING INPUT        Voltage      190-264V ac max, 1 phase 2 wire        Frequency    50-60HZ nominal        POWER INPUT        Voltage      140-220 V ac max, 3 phase,3 wire        CURRENT:   3A/phase        Frequency    100-120HZ nominal        OUTPUT        Voltage      max 120V dc        Current      continuous 2.7A dc                    Intermittent 6A for 10 secs        Resistance    15 ohms minimum REGULATION        +/-1% THERMAL DRIFT        0.03% per deg.C change in AVR ambient SOFT START PAMP TIME        3 sec TYPICAL SYSTEM RESPONSE        AVR respone         10ms        Filed current to 90%   80ms        Machine Volts to 97%  300ms EXTERNAL VOLTAGE ADJUSTMENT        +/-10% with 1k ohm 1 watt trimmer UNDER FREQUENCY PROTECTION         Set point    95%HZ         Slope       170% down to 30HZ         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:0.07A for 5% droop OPF         Max.input:0.33A OVER EXCITATION PROTECTION:          Set point:75vdc          Time relay:10sec Environmental         Vibration   20-100HZ             50mm/sec                    100Hz 2kHz           3.3g         Operating temperature              -40 to +70 C         Relative Humidity 0-70C            95%         Storage temperature                -55 to +80 C