{"id":1687,"date":"2021-03-14T04:04:40","date_gmt":"2021-03-13T20:04:40","guid":{"rendered":"https:\/\/marellispares.com\/demo\/?post_type=product&p=1687"},"modified":"2026-01-01T15:59:14","modified_gmt":"2026-01-01T07:59:14","slug":"m71fa320a-marelli-digital-avr-mec100d","status":"publish","type":"product","link":"https:\/\/marellispares.com\/shop\/product\/m71fa320a-marelli-digital-avr-mec100d\/","title":{"rendered":"M71FA320A – Marelli Digital AVR – MEC100D"},"content":{"rendered":"

The Marelli Digital Regulation System included in MEC-100 series are microprocessor-based electronic devices for the set-up and monitoring of the excitation system of Marelli generators with frame size ranging between 400 and 900. The configuration of the system and control parameters makes the MEC-100 series regulators flexible and suitable for a wide range of applications. These regulators are completely resin-bonded and isolated to keep operating reliability even in difficult working conditions (high levels of humidity, dust, salty atmosphere) and in presence of vibrations.<\/p>\n

The part number and the name, together with the proper suffix, describe the options included in the specific device.
\nHere below the selection tables:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
STYLE NUMBER SELECTION<\/th>\n<\/tr>\n<\/thead>\n
Device Model<\/b><\/td>\nName<\/b><\/td>\nSuffix<\/b><\/td>\nPart Number<\/b><\/td>\n<\/tr>\n
–<\/td>\nMEC-100<\/td>\n–<\/b><\/td>\nM71FA300A<\/td>\n<\/tr>\n
Basic<\/td>\nMEC-100<\/td>\nB<\/b><\/td>\nM71FA310A<\/td>\n<\/tr>\n
With Diode Monitoring<\/td>\nMEC-100<\/td>\nD<\/b><\/td>\nM71FA320A<\/td>\n<\/tr>\n<\/tbody>\n
OPTIONS GUIDE<\/th>\n<\/tr>\n<\/thead>\n
Feature<\/b><\/td>\nM71FA300A<\/b><\/td>\nM71FA310A<\/b><\/td>\nM71FA320A<\/b><\/td>\n<\/tr>\n
AVR<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
FCR<\/td>\n<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
PFR<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
VAR<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
P.I.D. parameterization<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Soft start<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Reactive Droop Compens.<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Field over-voltage<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Field over-current<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Generator over-voltage<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Generator under-voltage<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Generator over-current<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Loss of voltage sensing<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Diode Failure Monitoring<\/td>\n<\/td>\n<\/td>\n\u2714<\/td>\n<\/tr>\n
Over-excitation Limiter<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Under-excitation Limiter<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Under-frequency Limiter<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Internal Inrush Current Lim.<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
2 analogue inputs 4-20mA<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
8 digital inputs<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n
Human Machine Interface<\/td>\n\u2714<\/td>\n\u2714<\/td>\n\u2714<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Example: to order a MEC-100 with diode monitoring, the following model must be required:
\nMEC-100DM M71FA320A<\/p>\n","protected":false},"excerpt":{"rendered":"

Marelli Digital AVR With Diode Failure Monitoring, Model MEC-100 DM<\/h6>\n","protected":false},"featured_media":1774,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[148,181],"product_tag":[48,66,69,51,52,70,68],"class_list":{"0":"post-1687","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-digital-avr-automatic-voltage-regulator","7":"product_cat-google_shopping_listing","8":"product_tag-automatic-voltage-regulator","9":"product_tag-digital-avr","10":"product_tag-m71fa320a","11":"product_tag-marelli","12":"product_tag-marellispares","13":"product_tag-mec-100d","14":"product_tag-mec-100","15":"desktop-align-left","16":"tablet-align-left","17":"mobile-align-left","19":"first","20":"instock","21":"featured","22":"taxable","23":"shipping-taxable","24":"purchasable","25":"product-type-simple"},"yoast_head":"\nM71FA320A - Marelli Digital AVR - MEC100D - One Stop Shop Online<\/title>\n<meta name=\"description\" content=\"Complete sourcing for Marelli generator spare parts. 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