MarelliGenerators M40FA640A/A MARK I User Manual Download Page 3

ENGLISH 

SIN.NT.015.6 – M40FA640A/A 

Issued 04.2010 

INTRODUCTION 

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. 

IMPORTANT NOTE: It is not the intention of this document to 
cover all the installation or connection diagram variations, nor 
does this manual provide information for every possible 
contingency. The connection drawings provided with the 
generator, the generator user manual and all the technical 
information provided by Marelli Motori Technical Personnel can 
integrate this Note.

In particular, the connection drawings into this document are 
provided only for explanation purposes. They do not cover  all 
the application cases and not substitute the connection 
drawings usually provided with the generator. 

Should further information be required, please contact After 
Sales Department (see the reference at the end of the page). 

SAFETY PRECAUTIONS 

WARNING: when the regulation device is 
energized (generator running), a lethal 
voltage is present at the top panel 

(connection side) and at all the parts electrically connected 
to it.
 Furthermore, there are components into the card that can 
reach high working temperatures, with high danger for the user 
in case of direct contact. 

Every wiring and/or mechanical installation 
operation on the regulator must be performed only 
in generator stop conditions, and only by skilled 

personnel. Furthermore, pay attention to wait a time 
interval sufficient for the device cooling-down. 

Every regulation setting operation must be 
performed with generator running in no load 
conditions, by skilled personnel, using tools 

suitable to assure the user safety (i.e. isolated screwdriver, 
protection glasses and gloves).  
  

Marelli Motori is under no liability for any damages which may 
occur to the AVR, the plant or the persons, or for lost earnings, 
or financial loss, or system stoppages, due to missed out 
Technical Note reading (both safety and installation/operating 
instructions). 

Summary of Contents for M40FA640A/A MARK I

Page 1: ...M40FA640A A Mark I User Manual Automatic Voltage Regulator for Three phase Synchronous Generators Issued 04 2010 SIN NT 015 6...

Page 2: ...Page 1 Instruction Manual Instal l ati on Op er ation Maintenance hanada technology Co Ltd MARELLI AVR M40FA640A...

Page 3: ...rovided with the generator Should further information be required please contact After Sales Department see the reference at the end of the page SAFETY PRECAUTIONS WARNING when the regulation device i...

Page 4: ...ration DATI TECNICI TECHNICAL DATA 0 5 a regime per valori di tensione e carico nominali REGULATION ACCURACY steady state conditions for rated Voltage and PF 0 5 variazione di tensione per variazione...

Page 5: ...peration on regulator as replacement connection to accessories setting up extremely simple POWER STAGE INPUT TERMINALS U N terminals for power supply VOLTAGE SENSING INPUT TERMINALS S1 S2 S3 S4 S5 S6...

Page 6: ...s a live part UNDERFREQUENCY LIMITER 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 system of...

Page 7: ...ications The stability of the regulator can be set on field to adapt it to the characteristics of the plant and or the driving engine diesel engine water turbine gas turbine in order to obtain the bes...

Page 8: ...lleled with the grid an over excitation condition detected by the limiter can lead to a generator excitation shutdown with risk of loss of synchronism LIMITER SETTING for a quicker limiter setting it...

Page 9: ...By acting on potentiometer FREQ it is possible to adjust further in case should it be necessary the frequency at which the low speed protection is effective decreases frequency of intervention AMP po...

Page 10: ...to della limitaz Only for quick setting of the excitation limiter it permits to disable the normal limiter time delay Micro switch 4 ON OFF Protezione bassa frequenza con pendenza V f tarabile fare an...

Page 11: ...10 ENGLISH SIN NT 015 6 M40FA640A A Issued 04 2010 12 TERMINALS AUX WINDING...

Page 12: ...11 ITALIANO ENGLISH SIN NT 015 6 M40FA640A A Issued 04 2010 12 TERMINALS OVER EXCITATION DEVICE...

Page 13: ...12 ITALIANO ENGLISH SIN NT 015 6 M40FA640A A Issued 04 2010 6 TERMINALS OVER EXCITATION DEVICE...

Page 14: ...13 ITALIANO ENGLISH SIN NT 015 6 M40FA640A A Issued 04 2010 6 TERMINALS AUX WINDING...

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