MGT100 Series Protective Device for Electric Generator and Transformer

Introduction

MGT100 series protective device is a new generation protective relay, which integrates functions of relay protection, measurement, communication and telecontrol.

This product adopts unified software, hardware platform based on the embedded controller technique and real time multi-task operation system, and can form layered and distributed system for different detailed engineering application.
MGT100 series protective device is applicable for electric generators, transformers, reactor, busbar and transmission lines.

Main Products

  • MGT102 main protective unit for electric generator
  • MGT122 backup relay for electric generator with measurement and telecontrol 
  • MGT101 differential relay for transformer
  • MGT102 backup relay for transformer with measurement and telecontrol
  • MGT132 protective relay for busbar
  • MGT135 protective relay for transmission line with measurement and       telecontrol
  • MGT141 automatic throw-in unit

Functions

Function Code 102 122 101 112 132 135 141
protection
function 		Ratio differential 87 Y   Y   Y    
Transverse differential 87N Y            
Transverse differential for transmission line 87L           Y  
longitudinal directional 87L           Y  
Phase distance 21P           Y  
Directional over current 67P       Y   Y  
Over current with compound voltage 51S   Y   Y   Y  
Over current 51   Y   Y Y Y Y
Zero sequence over current 46   Y          
Zero sequence direction over- current 67N       Y      
Zero sequence over current 50N Y Y   Y Y Y Y

  Zero sequence over voltage 59N Y Y   Y      
Over voltage 59P   Y          
Low voltage 27   Y       Y  
Low frequency 81   Y       Y  
Revers power 32   Y          
Under load 37   Y          
Excitation loss 40   Y          
Stator ground 64S Y            
Rotor ground 64R Y            
TA failure   Y Y Y Y Y Y  
TV failure     Y   Y Y Y Y
control Recloser 79           Y  
Automatic throw-in               Y
Synchronous checking 25   Y   Y   Y Y
Breaker operation     Y   Y   Y Y
Input channel   Y Y Y Y Y Y Y
Output channel   Y Y Y Y Y Y Y
Measurement Current voltage frequency     Y   Y   Y  
Power, power factor P,Q     Y   Y   Y  
Power consumption   Y Y Y Y Y Y Y
Communication interface with user DL/T667 communication
(IEC60870-5-103)
   Y Y Y Y Y Y Y
Events recorder(195 times)   Y Y Y Y Y Y Y
Optical communication interface   Y Y Y Y Y Y Y


Standard Satisfied

GB14285-93     "Technical code for relay protection and security automatic equipment"
DL/T671-1999      "General Specification for microprocessor -based protective device of electric generator and transformer"
DL/T670-1999      "General specification for microprocessor -based protective device of transmission line"
GB7261-2000       "Basic test method for protective relay "
GB4856            "Insulation test of protective relay"
GB/T14598.10-1996      "Fast instant disturbance test"
GB/T14598.13-1998      "1MHz pulses group disturbance test"
    DL/T667-1999         Relay information interface standard

Technical Parameters

Engineering Application

It has been successfully used in nearly 100 projects of hydro-power plants, thermal power stations,and substations, etc.