M16FA655A - Mark V

Automatic Voltage Regulator for Three-phase Synchronous Generators

This Technical Note provides general installation and operating information exclusively concerning the Marelli Motori regulator code specified in the document, mounted on the Marelli Motori synchronous generators specified in the next paragraph “APPLICATION”. Before the generator start and any types of regulation operation, read carefully and completely this Technical Note.

Application

The voltage regulator type “MARK V”, is suitable for Synchronous Generators of MARELLI MOTORI make, MJB series, size range 160-250 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.

Technical Specification

Power supply voltage : 170÷277 V
Voltage sensing (single-phase) : 170÷277 V
Maximum continuative field current : 5 A
Maximum forcing field current : 8 A
Maximum field voltage : 100 V
Field resistance : 8 Ω ÷ 20 Ω
Regulation accuracy : ±0.5 %
Thermal Drift : ±0.5 %
Response time : 1 cycle
Operating temperature : -30°C / +70°C
Weight : 320 g

Functions

Protection : Under-frequency limiter, Over-excitation limiter, Internal fuse, replaceable
Control : With external potentiometer, 100 kΩ 1 W for ∆V = ±5 % of the rated voltage, with external DC voltage signal (0-10 V)