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Description:
Cummins Generator AVR - SX440
SX440 is a half-wave phase-controlled thyristor type Automatic Voltage Regulator (AVR) and forms part of the excitation system for a brush-less generator.
In addition to regulating the generator voltage, the AVR circuitry includes under-speed and sensing loss protection features. Excitation power is derived directly from the generator terminals.
Technical specification
| INPUT | |
| Voltage | 190-264V |
| ac Frequency | 50-60 Hz |
| nominal Phase | 1 Wire 2 |
| OUTPUT | |
| Voltage | max 90V dc at 207V ac input |
| Current | continuous 4A dc Intermittent 6A for 10 secs |
| Resistance | 15 ohms minimum |
| REGULATION | +/- 1% (see note 1) |
| THERMAL DRIFT | 0.04% per deg. C change in AVR ambient (note 2) |
| 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 (see note 3) |
| UNDER FREQUENCY PROTECTION | Set point 95% Hz (see note 4) Slope 170% down to 30 Hz |
| UNIT POWER DISSIPATION | 12 watts maximum |
| BUILD UP VOLTAGE | 4 Volts @ AVR terminals |
| ANALOGUE INPUT | Maximum input +/- 5V dc (see note 5) Sensitivity 1v for 5% Generator Volts (adjustable) Input resistance 1k ohm |
| QUADRATURE DROOP INPUT | 10 ohms burden Max. sensitivity: 0.07 A for 5% droop 0PF Max. input: 0.33A |
Other Generator/Genset Electronics Parts AVR / Governor
| AVR | Governor |
| AS440 | 3044196 |
| EA440-T | ESD5500E |
| SX440 | ESD5111 |
| SX460 | 3408324 |
| MX341 | ESD5570 |
| MX321 | 3037359 |
| AS480 | 3044195 |
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