| Conditions of Use: |
Marine, Land Use |
|---|---|
| Usage: | Emergency Crew, Standby Unit, Common Units |
| Output Type: | DC |
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The circuitry of the R448 Automatic Voltage Regulator (AVR) provides closed loop control of the alternator output voltage by regulating the exciter field current. The primary winding has a voltage in ratio to that of the alternator (characteristic shunt), the next has a voltage in proportion to the stator current (compound characteristic: booster effect). Which is powered by two auxiliary windings which are independent of the voltage equal circuit. The power supply voltage is rectified and filtered before being used by the AVR monitoring transistor. With PMG excitatioin, a permanent magnet generator (PMG) added to the alternator supplies the AVR with voltage which is free of the main alternator winding. This is built-in at the rear of the machine and connected to the R448 AVR, and the ST9 jumper must be disconnected.
*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 selection
Specificaion
Input voltage: 70-140V AC, (PMG, or auxiliary
winding, single, three phases)
Reaction is measured : 90-480V AC
MAX. output :DC 10A 125V
Function: Built-in low-speed , over excitation
LAM, REGULATION: +/-0.5%
| Generator AVR R448 | |
| Voltage regulation | ± 0.5% |
| Remote voltage adjustment range | ± 5% |
| Short circuit capability | 3 x Irated for 10 seconds |
| Voltage sensing | 95 to 140 volts (50/60 Hz) |
| 170 to 260 volts (50/60 Hz) | |
| 340 to 520 volts (50/60 Hz) | |
| Response time | Normal (1 sec) for ± 20% voltage variation |
| Rapid (0.3 sec) for ± 20% voltage variation | |
* High quality generator voltage regulator, long service life.
* Professional Factory directly supply, favourable price.
* Excellent service, any question is welcome to contact.
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