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Maxgeek MX450 Diesel Generator AVR Automatic Voltage Regulator Genset Voltage Stabilizer Board
Description:
-MX450 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.
-The AVR is connected with the main stator windings and the exciter field windings to provide closed loop control of the output voltage with load regulator of +/-1.0%. Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of generators output.
Specification:
Sensing Voltage: jumper selectable 120 (95-132) VAC, 240 (190-264) VAC, single phase 2wire
Frequency: 50-60HZ nominal
Voltage Input: Max 90VDC at 207VAC input
Resistance: 15Ω minimum
Regulation: <±1% RMS with 4% engine governing
Voltage Build-up: residual voltage at AVR terminal >5Vac
External Voltage Adjustment: +/-7% with 1k ohm 1 watt trimmer
Generator Power: ＞150kw
Voltage Adjustment:
The generator output voltage can be altered by adjustment of the volt on the AVR board, or by the external trimmer (1KΩ) if fitted.
1. The terminals 1&2 must be connected if no hand trimmer.
2. Before start the generator, please turn the volt trimmer on the AVR board fully anticlockwise. Turn the external trimmer to midway position.
3. Turn the stability trimmer on the AVR board to midway position.
4. Connect a voltmeter to generator output voltage terminals.
5. Start generator set and run on no load at nominal frequency 50-53Hz or 60-63Hz.
6. If the red LED is illuminated, refer to the under frequency roll off adjustment.
7. Carefully turn volt trimmer clockwise until rated voltage is reached.
Stability Adjustment:
If a replacement AVR has been fitted or re-setting of the stability control is required, turn the stability trimmer slowly clockwise until the output voltage is steady, on or off load.
Droop Adjustment:
Generator intended for parallel are fitted with a quadrature droop CT with provides a power factor dependent signal for the AVR. The CT is connected to S1, S2 on the AVR. The droop adjustment is normally present in the works to give 5% voltage droop at full load zero power factor. Clockwise increases the amount of CT signal injected into the AVR and increases the droop with lagging power factor. With the control fully anticlockwise there is no droop.
Trim Adjustment:
An auxiliary input is provided to connect to A1, A2. It is designed to accept DC 5V. Turn the trimmer fully anticlockwise has no effect, clockwise it has maximum effect.
Package List:
1 x Automatic Voltage Regulator
