Complaint
SX460 is a half-wave phase- controlled thyristor type Automatic Voltage Regulator and forms part of the excitation system for a brushless generator.
In addition to regulating the generator voltage, the AVR circuitry includes under speed and sensing loss protection to ensure safe, reliable control of the generator.
Positive voltage build up from residual levels is ensured by the use of proficient semiconductors in the power circuitry of the AVR. Which is linked with the main stator windings and the exciter field windings to offer closed loop control of the output voltage with load regulations of +/- 1.5%
Stability adjustment
Under frequency roll off adjustment
| SX460 | |||
| Input | Voltage | Jumper selectable 95-132V ac or 190-264V 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 | ||
| Environmental | Vibration | 20-100 Hz,50mm/se | |
| 100Hz - 2kHz, 3.3g | |||
| Operating temperature | -40 to +70 Deg. C | ||
| Relative Humidity 0-70 Deg. C | 95% | ||
| Storage temperature | -55 to +80 Deg. C | ||
*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%
Product Description
*3 Phase Sensing Permanent Magnet Generator type voltage regulator is a compatible replacement for Newage MX321 and Onan 305-0823.
* MX321 is a three phase sensed Automatic Voltage Regulator and forms part of the excitation system for a brushless generator.Excitation power is derived from a three phased permanent magnet generator(PMG),to isolate the AVR control circuits from the effects of nonlinear loads and to reguce radio frequency interence on the generator terminals.Sustained generator short circuit current is another feature of the PMG system.
* The AVR sense the voltage in the main generator winding and controls the excitation to maintain the generator output voltage with the specified limits,compensating for load,speed,temperature and power factor of the generator.Thress phase RMS sensing is emplyed for superior voltage regulation.
* Adjustable soft start circuitry is included to provide a smooth controlled build up of generator output voltage.
| 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 | 3A/phase | ||
| Frequency | 100-120 Hz nominal | ||
| Output | Voltage | Max 120V dc | |
| Current | Continuous 3.7 A, Intermittent 6A for 10 secs | ||
| Resistance | 15 ohms minimum | ||
| Regulation | +/- 0.5% RMS with 4% engine governing | ||
| Thermal Drift | 0.02% per Deg. C change in AVR ambient | ||
| Soft Staret Ramp Time | 0.4 - 4 seconds | ||
| Typical system response | AVR response | 20ms | |
| Filed current to 90% | 80 ms | ||
| Machine Volts to 97% | 300ms | ||
| External voltage adjustment | +/-10% with 5k ohm 1 watt trimmer | ||
| Under frequency protection | Set point | 95% Hz | |
| Slope | 100%-300% down to 30 Hz | ||
| Max. Dwell | 20% volts/S recovery | ||
| Unit power dissipation | 18 watts maximum | ||
| Analogue Input | Maximum input | +/- 5 Vdc | |
| Sensitivity | 1v for 5% Generator Volts (adjustable) | ||
| Input resistance | 1k ohm | ||
| Quadrature Droop Input | 10 ohms burden | ||
| Max. sensitivity: 0.22 A for 5% droop 0PF | |||
| Max. input: 0.33A | |||
| Environmental | Vibration | 20-100 Hz,50mm/se | |
| 100Hz - 2kHz, 3.3g | |||
| Operating temperature | -40 to +70 Deg. C | ||
| Relative Humidity 0-70 Deg. C | 95% | ||
| Storage temperature | -55 to +80 Deg. C | ||
