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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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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
GE Multilinwww.gemultilin.co
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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
GE Multilinwww.gemultilin.co
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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:
PROTECTION AND CONTROL
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GE Multilinwww.gemultilin.co
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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:
PROTECTION AND CONTROL
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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
PROTECTION AND CONTROL
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• Programmable Inputs and Outputs (available in Option 1 & 2 models)
MIFII Programmable Inputs, Outputs & LEDs:
PROTECTION AND CONTROL
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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:
PROTECTION AND CONTROL
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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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GE Multilinwww.gemultilin.co
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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)