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MIFII DIGITAL FEEDER PROTECTION

A Cost Effective Protection Solution for Overcurrent Protection at Any Voltage Level

GE Multilinwww.gemultilin.co

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MIFII Protection and Control characteristics:

BLOCK DIAGRAM

Combines Overcurrent Protection and Multiple-shot Reclosing in One Compact Relay

Combines Overcurrent Protection and Multiple-shot Reclosing in One Compact Relay


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REPLACE ALL THIS………………………………………….……….WITH MIFII

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MIFII – OVERCURRENT PROTECTION

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The MIFII can be used for:

• Applicable to Electric Utilities and Industrial Plants

• 50 or 60 Hz Systems• Main Protection for Medium and Low

Voltage Feeders• Main Protection for Power Transformers

(less than 10MVA)• Core Balance Differential Protection for

Motors• Backup Protection for Power Transformers

(for any power level)• Backup Protection for Generators• Backup Protection for Transmission Lines• Backup Protection for Substation Busbars• Thermal Image Protection/Supervision for

Cables, Power Transformers, Grounding Resistors and Generation Elements

APPLICATIONS


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TYPICAL WIRING

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MIFII Protective Functions include:

• Phase Time Overcurrent (51P)0.1 – 2.4 A (1Amp model)0.5 – 12A (5Amp model)

• Ground Time Overcurrent (51G)0.1 – 2.4 A (1Amp model)0.5 – 12A (5Amp model)

• Phase Inst Overcurrent (50P-1, 50P-2) 0.1 to 30.0 (1 Amp model)

0.5 to 150.0 (5 Amp model)

• Ground Inst Overcurrent (50G-1, 50G-2)0.1 to 30.0 (1 Amp model)0.5 to 150.0 (5 Amp model)

• Sensitive and Very Sensitive Ground Overcurrent Models

0.005-0.12 A or 0.002-0.048A (1 Amp model)

• Selectable Time Overcurrent Curves (Definite Time, ANSI, IAC or IEC)

PROTECTION AND CONTROL

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• Preconfigured Overcurrent Curves, Definite Time Curve &One User Configurable Overcurrent Curve (FlexCurve)

• Selectable ANSI, IAC or IEC curve option when ordering

• IAC Option

IAC Extremely Inverse

IAC Very Inverse

IAC Inverse

IAC Inverse Long

IAC Inverse Short

• ANSI Option

Extremely Inverse

Very Inverse

Inverse

• IEC Option

Inverse (IEC Curve A)

Very Inverse (IEC Curve B)

Extremely Inverse (IEC Curve C)

MIFII Time Current Curve Options:


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• Thermal Image Protection (49)

• Cold Load Pickup (available in Option 2 models)(Phase IOC & TOC multipliers)

• Breaker Failure to Open (available in Option 2 models)

• I2 Counter with Alarm for Breaker Health Monitoring (available in Option 2 models)

MIFII Protective Functions include:


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• Logic Configuration (available in Option 2 models)

•4 logic groupings (Logic 1, Logic 2, Logic 3 and Logic 4)

MIFII Programmable Logic & I/O Features


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• Programmable Inputs and Outputs (available in Option 1 & 2 models)

MIFII Programmable Inputs, Outputs & LEDs:


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• Four Shot Recloser for Three-Pole Application (available in Option R models)

• Select protective functions to be active before and after each reclose shot

• Selectable shot dead times

• Selectable reset time and incomplete sequence time

• 2 Setting groups

• Manual Open/Close Breaker

• Security• Access password for setting

changes

• Local access password

MIFII Control Features:


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• Phase and ground currents metering(Ia, Ib, Ic, Ig) on front display in primary or secondary values

• Thermal image metering

• 32 event recorder with analog and pickup/trip details (available in Option 1 and Option 2 models)

MIFII Metering & Monitoring Features:

METERING & MONITORING

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• One oscillography record (available in Option 1 and Option 2 models)

• 8 samples per cycle with a length of 24 cycles (including 2 prefault cycles)

• Instantaneous values Ia, Ib, Ic, Ig

• Pickups

• Trip inhibition by digital input

• Trips

• Ready (protection in service)

• Auxiliary digital outputs

• Digital inputs

• Breaker 52A, Breaker 52B, (digital input status)

• Breaker Closed (OPTION 2 models)

• Breaker opening failure (OPTION 2 models)

• I2 alarm (OPTION 2 models)

• Cold load pickup (OPTION 2 models)

• Group 2 selection by digital input

• EEPROM failure

• Default settings/User settings

MIFII Metering & Monitoring Features:

METERING & MONITORING

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DISPLAY & LEDS

KEYPAD

Text 2x16 display 6 LEDs with customizable label panel (4

programmable with Option 1 and Option 2 models)

Able to Read Metering Display in Direct Sunlight

ESC/RESET key UP/DOWN keys for easy navigation ENTER function Menu key

FRONT PORT

Electrically isolated front RS232 communication port for programming, data retrieval and firmware update

HARDWARE

DRAWOUT CONSTRUCTION

Entire MIFII unit is removable from case

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Compact Design in a Modular Package for Easy MaintenanceCompact Design in a Modular Package for Easy Maintenance

DIMENSIONSOPTIONAL DEPTH REDUCING COLLAR (B1315P1)

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Logic

MeteringOscillography

MIIPC Software provides the following functions:

Powerful Configuration Tool That Get the MIFII up and Running in Minutes

Powerful Configuration Tool That Get the MIFII up and Running in Minutes

Settings

EnerVista MII Setup Software (no-charge)

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• A front mounted RS232 and a rear RS485 port allow easy user interface via a PC

• Modbus RTU protocol is used for all ports

• The relay supports baud rates from 300 to 19200 bps. Settable Modbus Slave address.

• Use optional MULTINET-FE to get Modbus TCP/IP connection (10MBps)

• Compatible with Viewpoint Monitoring Software

COMMUNICATIONS

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OPTION TO GET HARSH CONFORMAL COATING – H (last letter of model number)

MIFII - ORDER CODE

AC/DC Power Supply

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• B1315P1 Depth reducing collar (reduces the mounting depth by 2.45 inches)

• B1343P1 S1/S2 case adapting collar for retrofit installations

MIFII - ACCESSORIES

OPTIONAL S1/S2 CASE ADAPTER COLLAR

(B1343P1)

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