| Current Type: | AC |
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| Phase: | Three Phase |
| Frequency Characteristics: | Low Frequency |
| Usage: | SVC |
| Frequency: | Low Frequency |
| Size: | Small |
| Samples: |
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| Customization: |
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Audited Supplier Leroy somer R450 AVR 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 excitation, a permanent magnet generator (PMG) added to the alternator supplies the AVR with voltage.
On Application of load, the rotation speed of the generator set deceases, when it passes below the preset frequency threshold the LAM causes the voltage to drop by approximately13% or 25% and consequently the quantity of active load applied is reduced by approximately 25% to 45%, until the speed reaches its rated value again. Hence the LAM can be used either to reduce the speed variation (frequency) and its duration for a given applied load, or to increase the applied load probable for one speed variation (turbo-charged engine).
1. Leroy SomerAutomatic Voltage Regulator R450
2. Single or three phase voltage sensing with optional module.
3. Load acceptance module, PMG / AREP excitation system
4. Phase to phase voltage sensing.
5. Suitable for high levels of vibration and harsh environments
Main characteristics:
Voltage regulation +/- 0.5% at steady state and constant speed.
Control by transistor means that the regulation quality is independant of applied load.
Phase to phase voltage sensing.
Suitable for high levels of vibration and harsh environments.
Integrated "LAM" and " auto adaptative LAM" system to cope with load impacts applied to the engine
AREP or PMG excitation with normal or fast response.
Single or three phase voltage sensing with optional module.
Rotating switch facilitating selection.
| Voltage | 230± 2V |
| Voltage Steady Range | ± 1V |
| Starting Excitation Voltage | ≥1.5V |
| Loading Capacity | With 110% loading, the regulator can work normally |
| Output Voltage Steady on hot and cool condition | ≤2V |
| Temperature float on Output Voltage | ≤2V |
*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 |
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| 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 | ||
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