We are open There may be some delays, please click here for more updates on our operations during the Covid-19 pandemic.To our local customers, please click here for additional information.This quality unit has a TWO Year Warranty on stand-by use, and one year warranty.Save: 26 off Buy Now.
Replaces: E000-234121P E000-23412 E000-23410 MX341 (All earlier versions) MX341 2 MX341-2 Dealers volume users contact us for even lower. Save approx. 950.00 over the genuine Cummins part Not a Genuine. If your order is urgent, call 1-800-630-1230 to confirm when it will ship. ![]() If you order the wrong part(s) online, we cannot be responsible. Mx321 Avr Generator Voltage SignalThe DC Mixer adds the Analogue input signal the generator voltage signal. Published on January 2017 Categories: Documents Downloads: 23 Comments: 0. Excitation power is derived from a three-phase permanent magnet generator (PMG), to isolate the AVR control circuits from the effects of non- linear 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 controls the excitation to maintain the generator output voltage within the specified limits, compensating for load, speed, temperature and power factor of the generator. Three phase RMS sensing is employed for superior voltage regulation. Adjustable Soft start circuitry is included to provide a smooth controlled build up of generator output voltage. A frequency measuring circuit continually monitors the shaft speed of the generator and provides under-speed protection of the excitation system by reducing the generator output voltage proportionally with speed below a pre-settable threshold. A further enhancement of this feature is an adjustable volts per Hertz slope and voltage recovery time, to improve the response of turbo charged engines. Current limiting may be included to allow control over the amount of sustained short circuit current. ![]() This condition remains latched until the generator has stopped. Mx321 Avr Plus The AbilityThe AVR includes an over-voltage protection feature with internal shutdown of the AVR output device, plus the ability to trip an optional excitation circuit breaker if required. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the generators output. An analogue input is provided allowing connection to a Newage Power Factor controller or other external device with compatible output. The AVR has the facility for droop CT connection, to allow parallel running with other similarly equipped generators. 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 3Aphase Frequency 100-120 Hz nominal OUTPUT Voltage max 120V dc Current continuous 3.7 A (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 10 ms Filed current to 90 80 ms Machine Volts to 97 300 ms EXTERNAL VOLTAGE ADJUSTMENT -10 with 5 k ohm 1 watt trimmer (see note 4) UNDER FREQUENCY PROTECTION Set point 95 Hz (see note 5) Slope 100-300 down to 30 Hz Max. Dwell 20 voltsS recovery UNIT POWER DISSIPATION 18 watts maximum ANALOGUE INPUT Maximum input - 5 Vdc (see note 6) Sensitivity 1v for 5 Generator Volts (adjustable) Input resistance 1k ohm QUADRATURE DROOP INPUT 10 ohms burden Max. Time delay: 1 Sec (fixed) CB trip coil volts: 10-30 vdc CB trip coil resistance: 20-60 ohms OVER EXCITATION PROTECTION Set point 75 V dc Time delay 8-15 seconds (fixed) ENVIRONMENTAL Vibration 20-100 Hz 50mmsec 100Hz 2kHz 3.3g Operating temperature -40 to 70 0 C Relative Humidity 0-70 0 C 95 (see note 7) Storage temperature -55 to 80 0 C NOTES 1. Derate linearly from 3.7A at 50C to 2.7A at 70C 2. The stated voltage regulation may not be maintained in the presence of certain transmitted radio signals. Any change in regulation will fall within the limits in Criteria B of BS.EN.61000-6-2: 2001. After 10 minutes. Applies to Mod status E onwards. Check with factory. Factory set, semi-sealed, jumper selectable. Any device connected to the analogue input must be fully floating (galvanically isolated from ground), with an insulation strength of 500V ac. Non condensing. DESIGN DETAIL TDMX321.GB06.0303 The main functions of the AVR are: Potential Divider and Rectifier takes a proportion of the generator output voltage and attenuates it. The potential divider is adjustable by the AVR Volts potentiometer and external hand trimmer (when fitted). A rectifier converts the a.c.
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