Alstom MFAC User Manual

MCAG/MFAC
User Guide
Application of High Impedance Relays
Publication Reference: R6136C
R6136C © 2012. ALSTOM, the ALSTOM logo and any alternative version thereof are trademarks and service marks of ALSTOM. The other names mentioned,
registered or not, are the property of their respective companies. The technical and other data contained in this document is provided for information only. Neither
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GRID

Alstom MFAC Specifications

General

Brand	Alstom
Model	MFAC
Category	Relays
Language	English

Summary

High Impedance Relays Overview

Introduction to High Impedance Relays

Defines high impedance relays and explains their fundamental operating principles and stability.

MCAG14/34 and MCTI14/34 Relay Details

Details the specifications, characteristics, and internal workings of MCAG14/34 and MCTI14/34 relays.

Applying MCAG14/34 & MCTI14/34 Relays

Outlines the practical application scenarios and implementation steps for MCAG14/34 and MCTI14/34 relays.

Metrosil Non-linear Resistors and MFAC Relay Application

Applying the MFAC14/34 Relay

Explains the application of the MFAC14/34 relay, focusing on its operating current and metrosil requirements.

Typical Setting Examples and Applications

Restricted Earth Fault Protection using MFAC14

Illustrates the application of the MFAC14 relay for restricted earth fault protection in a transformer.

Restricted Earth Fault Protection using MCAG14

Demonstrates the application of the MCAG14 relay for restricted earth fault protection on a transformer L.V. winding.

Restricted Earth Fault Protection using MCT114

Details the application of the MCT114 relay for restricted earth fault protection in a transformer.

Generator Winding Differential Protection using MCAG34

Explains the application of the MCAG34 relay for generator winding differential protection.