OEM No/Model: R438
Automatic Voltage Regulator (AVR)
AVR R438
Specification:
Parameter sheet of AVR R438 |
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Input | Voltage | Jumper selectable 95-140V ac or 170-260V ac or 340-520V ac | |
Frequency | 50-60 Hz nominal | ||
Phase | 1 | ||
Output | 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 terminals | ||
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