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Voltage regulator for three-phase synchronous generators "M25FA600A"

Item Description:

The “Z1” type voltage regulator model M25FA600A is suitable for synchronous generators manufactured by MARELLI MOTORI, of the M7B series, for sizes M7B 160-500. This regulator is appropriate for operation in power generators from 10 to 2000 kVA. The regulator is completely isolated to maintain high operating reliability even in difficult environmental conditions (high levels of humidity, dust, saline atmosphere), and in the presence of vibrations. The regulator is suitable for operation on both three-phase and single-phase generators.

TECHNICAL SPECIFICATIONS:

  • Regulation accuracy: +/- 1% in stationary conditions
  • Voltage drift: voltage variation of +/- 1%, for an ambient temperature variation of 50° C
  • Response time: 1 cycle
  • Operating temperature: -20°C ÷ +60°C
  • Exciter field resistance: 3 Ohm (min) ÷ 25 Ohm (max)
  • Supply voltage: 170 -270 V (100/120 Hz)
  • Power: 1000 VA (max)
  • Dissipated Power: 30 W (max)
  • Voltage detection: 170 -270, 350 – 480 V
  • Output Voltage (DC): 30V
  • Output Current (DC): 8A (max, continuous)
  • Output current (DC): 15 A (max forcing one minute)

Potentiometers:

  • P1: potentiometer for regulating the generator output voltage. This internal potentiometer allows a notable voltage range (between 350 and 450 V, or between 170 and 270 V): in case of intervention on this potentiometer, the voltage must not be varied more than 5% compared to that on the rating plate. If you want to obtain finer regulation, or control the voltage remotely, or even limit the voltage variation range, you need to add an external potentiometer.
  • P2: calibration potentiometer for low frequency protection intervention. It is normally calibrated to reduce excitation when the speed drops more than 10% below the rated speed compared to 50Hz. By cutting the brown wire of connector B you obtain the appropriate intervention for operation at 60 Hz.
  • P3: stability calibration potentiometer.
  • P4: potentiometer for particular voltage regulation, if the RDT is combined with additional devices (e.g. power factor regulation device or parallel to the mains).

Dimensions and weights: 150x80x50mm and 0.5kg.

Package Included:

Voltage regulator 1.00 pcs. and user and installation manual.

N.B. : It is specified that this product is a high quality universal spare part, it does not mean that it can be ADDED to Generators that are not equipped with AVR.

M25600
1 Item

Data sheet

Power (kW)
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