Maxgeek R120 Generator AVR Automatic Voltage Regulator Voltage Stabilizer for Leroy Somer Alternator

Maxgeek AVC63-7 Diesel Generator AVR Automatic Voltage Regulator Genset Voltage Stabilizer 200KVA

Description:
Generator voltage regulator AVR AVC63-7 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 inked 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 %.

Specification:
Sensing Voltage Input: 190-240V AC
Voltage Input: 190-277V AC
Frequency: 50-60Hz nominal
Voltage Output: max 63V DC at 207V AC input
Current: continuous 7A, intermittent 10A for 10 secs
Regulating: ±1% RMS with 4% engine governing
Type: brushless

Frequency Roll-off Adjustment:
The AVC 63-7 under frequency adjust is factory preset to cause an average 1 volt drop in the generators line input voltage to the regulator when the frequency between 54.5 and 55.5Hz (for 60Hz applications) . For 50Hz applications, the frequency roll-off is factory preset to between 44 and 46HZ. To reset the frequency roll-off, proceed as follows.
1. Adjust the prime mover rpm to the desired frequency compensation (corner frequency roll-off) point.
2. Adjust the front panel FREQ control CW until the output voltage starts to drop off.
3. Bring the prime mover up to rated speed. The output voltage should return to normal.

Stability Adjustment:
An oscilloscope or other voltage recording device should be used if a stability setting is desired that will provide the fastest possible voltage response with good generator stability.
1. Rotation of the front panel TAB control in the clockwise (CW) direction will slow response time.
2. Rotation of the front panel STAB control in the counterclockwise (CCW) direction will speed response time. If rotated too far CCW, the generator voltage may oscillate (hunt).
3. Rotate the front panel STAB control CCW until the system starts oscillating and hen rotate CW just past the point where oscillation occurred.
1) Installation of a jumper across terminals 6 and 7 allows the internal (front panel) VOLT adjustment to vary the generator nominal voltage over the range shown in the specifications voltage adjustment.
2) A 1,500 ohm, 2 watt rheostat may be connected to terminals 6 and 7. This will allow approximately +10% adjustment via the remote 1 , 500 ohm rheostat.

Droop Adjustment:
The droop adjustment allows for adjustment of the amount of droop which will occur in the generator output voltage for a given amount of reactive load current. A CT should be selected which will supply the AVC with 3 to 5 amperes of current with rated load and power factor on the generator. With 5 amperes of current supplied by the CT, at 0.8 power factor, the amount of droop can be adjusted from0 to 6% of nominal generator voltage.
1. Determine the amount of droop desired; 3% to 5% is common. Adjust the droop potentiometer fully CW.
2. Bring the generator up to rated speed and rated voltage. Apply full load at rated power factor.
3. Adjust the droop potentiometer until the desired amount of droop is achieved.

Package List:
1 x Automatic Voltage Regulator