Maxgeek M16FA655A Generator AVR Automatic Voltage Regulator 100kw Three Phase for Malali Generator

Maxgeek M16FA655A Generator AVR Automatic Voltage Regulator 100kw Three Phase for Malali Generator

Description:
The AVR M16FA655A automatic voltage regulator type "MAR KV" M16FA655A, suitable for synchronous generators of MARELLI MOTORI make, MJB series, size range 160-225 frames. The regulator is fully insulated in order to maintain high reliability also with severe ambient conditions (high level of humidity, dust, salt atmosphere), and in case of high vibrations level. The regulator is proper both for single and 3-phase generators.

Specification:
Regulation Accuracy: +/-0.5% rated steady state conditions
Response Time: 1cycle
Operating Temperature: -30℃ to +70℃
Exciter Field Resistance: 8Ω(min), 20Ω(max)

Input/Output Data:
Supply Voltage: 170-270V
Power Supply: 350 VA (max)
Power Dissipated: 15W (max)
Voltage Sensing: 170-270V
Output Voltage (DC): 30V
Output Current (DC): 5A continuously
Output Current (DC): 8A intermittently

External Potentiometer:
At the terminals "P" and "Q" an external trimmer (minimum rating 500mW, resistance about 100kohm can be connected. By acting on such trimmer, it is possible to obtain a voltage regulation of about +/-5% around the nominal voltage. By using a 200kohm potentiometer it is possible to obtain a voltage regulation of about +/-10%. The trimmer is connected anyway through the regulator) to the output of the generator and then it represents a live part.

Use of Potentiometer:
-P1/VOLT-potentiometer for adjusting the output voltage of the generator.
Normally the internal potentiometer P1 allows possibility of adjusting the voltage in a wide range (i.e. between 350 and 470 V, or between 170 and 260 V); to obtain a finer possibility of voltage setting or to adjust the voltage from the control panel or in order to limit the voltage range, an external potentiometer can connected to the terminal "P" and "Q"(resistance about 100kOhm, 500mW, to obtain +/ -5% voltage regulation).
-P2/FREQ-potentiometer for changing the low speed protection.
Usually it is set at the factory in order to reduce the excitation when speed become slower than 90% of rated speed at 50Hz. By removing the bridge which normally shorts the terminals "Hz" and "60", the speed protection acts properly for 60Hz operation.
-P3/STAB-stability potentiometer: by rotating it clockwise stability increases but response time becomes larger.
-P4/AMP-potentiometer for changing the over excitation protection, in case of over excitation due to load conditions that could cause the rotor damage.

Stability Setting:
The voltage regulator is provided with internal adjustable stability circuits in order tallow operation in a wide range of applications. The operation of the regulator can be set on field to adapt it to the characteristics of the plant and of the driving engine (diesel engine, water turbine, gas turbine) in order to obtain the best voltage response. To change the stability characteristics of the regulator  it is necessary to act on the potentiometer "P3/STAB".

Over Excitation Protection:
In case of over excitation due to load conditions that could cause the rotor damage. The protection is delayed to avoid transitory conditions and acts by decreasing excitation and holding it to a safety level. To change the over excitation threshold of the regulator, it is necessary to act on the potentiometer "P4/AMP".

Low Speed Protection:
The regulator is provided with internal circuits in order to reduce the excitation when running at low speed, in order to avoid damages to the excitation device system of the generator (i.e. to the regulator, to exciter field, to rotating rectifier, main rotor). The potentiometer "P2/FREQ, fixes the corner-frequency, that is the frequency at which that protection becomes effective. Below that particular frequency the voltage of the generator reduces further with speed reduction( voltage reduction is twice the reduction in speed.

Fuse:
The voltage regulator is provided with an internal protecting fuse (5A 500V) (which acts in case of faults on the regulator or very large overloads on exciter circuit).

Package List:
1 x Automatic Voltage Regulator