GE MIGII Legacy Generator Protection System

GE MIGII Legacy Generator Protection System

GE MIGII Legacy Generator Protection System

ModulAr MIcroProcESSor FAMIly An economical choice for standard digital relaying applications

KEy BEnEFItS • Ease of use and installation - same front panel programming, common cutout 

• Follow technology evolution - Flash memory for product field upgrades 

• Low priced scalable options - event reports, waveform  capture, recloser, breaker fail 

• Reduce troubleshooting and maintenance cost - Event reports, waveform capture 

• Design flexibility - Easy to use programming logic APPlIcAtIonS 

• Asset monitoring - Breaker health, and breaker failure protection 

• Access to information - Modbus RTUTM communications 

• AC/DC power supply 

• Easy access via front panel keypad or communication link

APPlIcAtIonSFeeder protection • Main protection for small generators and motors • Backup/Auxiliary protection for transformers, motors,   generators and busbars • Overload protection FEAturES • Automatic transfer equipment • Load shedding and restoration schemes • Backup directional overcurrent protection • Reverse power protection • Synchrocheck

ProtEctIon PHASE tIME oVErcurrEnt Pickup level: 10 – 240% of CT rating curve shapes: Definite time, inverse, very inverse, extremely inverse, custom time multiplier: 0.05 – 2.00 in steps of 0.01 definite time: Up to 99.99 sec (10 msec steps) Accuracy:     level: ±3% in the complete range     time: Greater of ±3% or ±25 ms Ground tIME oVErcurrEnt Pickup level: 10 – 240% of CT rating curve shapes: Definite time, inverse, very inverse, extremely inverse, custom time multiplier: 0.05 – 2.00 in steps of 0.01 definite time: Up to 99.99 sec (10 msec steps) Accuracy:     level: ±3% in the complete range     time: Greater of ±3% or ±25 ms PHASE InStAntAnEouS Pickup level: 10 – 3000% of CT rating definite time: Up to 99.99 sec (10 msec steps) Accuracy:     level: ±3% in the complete range     time: Greater of ±3% or ±25 ms Ground InStAntAnEouS Pickup level: 10 – 3000% of CT rating definite time: Up to 99.99 sec (10 msec steps)     level: ±3% in the complete range     time: Greater of ±3% or ±25 ms Ground dIrEctIonAl torque angle:-90°, +90° (1° steps) direction: Forward/back (rew) loss of voltage polarization logic: Enable/disable ISolAtEd Ground dIrEctIonAl (MIn oPtIon S) Voltage pickup levels: Vh 2 – 70 V in steps of 0.01 V Vi 2 – 70 V in steps of 0.01 V current pickup levels: I low 5 – 400 mA in steps of 1 mA I hi 5 – 400 mA in steps of 1 mA definite time: 0 – 99.99 sec in steps of 10 msec Instantaneous trip deviation time: 0 – 99.99 sec in steps of 100 msec torque angle:-90°, +90° (1° steps) PEtErSEn coIl Ground dIrEctIonAl Voltage pickup levels: Vh 2 – 45 V in steps of 0.1 V current pickup levels: I low 5 – 100 mA in steps of 1 mA real power pickup levels: 10 – 4500 mW in steps of 0.1 mW definite time: 0.03 – 3 sec in steps of 10 msec Instantaneous trip deviation time: 1 – 10 sec in steps of 100 msec torque angle:-90, +90 (0.01 steps) dIrEctIonAl rEVErSE PoWEr Power pickup level: 0.01 – 0.99 x Rated MW time delay: 0.2 – 120 seconds in steps of 0.1 Block from online: 0 – 5,000 sec. dIrEctIonAl loW ForWArd PoWEr Power pickup level: 0.01 – 0.99 x Rated MW time delay: 0.2 – 120 seconds in steps of 0.1 Block from online: 0 – 15,000 sec. loSS oF EXcItAtIon circle 1 diameter: 2.5 – 300 ohm circle 1 offset: 2.5 – 150 ohm circle 1 trip delay: 0.1 – 10 sec circle 2 diameter: 2.5 – 300 ohm circle 2 offset: 2.5 – 150 ohm circle 2 trip delay: 0.1 – 10 sec tHErMAl IMAGE unIt tap current: 10 – 240% of CT rating cool rate:     t1 3 – 600 min     t2 1 – 6 x T1     K 1 – 1.2 Alarm level: 70 – 100% PHASE undErVoltAGE Pickup level: 2.0 to 60 V or 10 to 250 V in steps of 0.1 (depending on model) curve shapes: Definite time time delay: 0.0 to 600 sec in steps of 0.01 Accuracy:     level: ±3% over the complete range     time: Greater of ±3% or ±25 ms PHASE oVErVoltAGE Pickup level: 2.0 to 60 V or 10 to 250 V in steps of 0.1  (depending on model) curve shapes: Definite time time delay: 0.0 to 600 sec in steps of 0.01 Accuracy:     level: ±3% over the complete range     time: Greater of ±3% or ±25 ms Ground oVErVoltAGE Pickup level: 2.0 – 60 V or 10 – 250 V in steps of 0.1 (depending on model) curve shapes: Definite time time delay: 0.0 to 600 sec in steps of 0.01 Accuracy:     level: ±3% over the complete range     time: Greater of ±3% or ±25 ms