1. MIFII DIGITAL FEEDER PROTECTION A Cost Effective Protection Solution for Overcurrent Protection at Any Voltage Level
GE Multilin

2. BLOCK DIAGRAM MIFII Protection and Control characteristics:
Combines Overcurrent Protection and Multiple-shot Reclosing in One Compact Relay

3. + MIFII – OVERCURRENT PROTECTION
REPLACE ALL THIS………………………………………….……….WITH MIFII +

4. APPLICATIONS 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

5. TYPICAL WIRING

6. PROTECTION AND CONTROL
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) to 30.0 (1 Amp model) 0.5 to (5 Amp model)
Ground Inst Overcurrent (50G-1, 50G-2) 0.1 to 30.0 (1 Amp model) 0.5 to (5 Amp model)
Sensitive and Very Sensitive Ground Overcurrent Models A or A (1 Amp model)
Selectable Time Overcurrent Curves (Definite Time, ANSI, IAC or IEC)

7. PROTECTION AND CONTROL
MIFII Time Current Curve Options:
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)

8. PROTECTION AND CONTROL
MIFII Protective Functions include:
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)

9. PROTECTION AND CONTROL
MIFII Programmable Logic & I/O Features
Logic Configuration (available in Option 2 models)
4 logic groupings (Logic 1, Logic 2, Logic 3 and Logic 4)

10. PROTECTION AND CONTROL
MIFII Programmable Inputs, Outputs & LEDs:
Programmable Inputs and Outputs (available in Option 1 & 2 models)

11. PROTECTION AND CONTROL
MIFII Control Features:
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

12. METERING & MONITORING MIFII Metering & Monitoring Features:
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)

13. METERING & MONITORING MIFII Metering & Monitoring Features:
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

14. HARDWARE DISPLAY & LEDS 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
KEYPAD
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
DRAWOUT CONSTRUCTION
Entire MIFII unit is removable from case

15. Compact Design in a Modular Package for Easy Maintenance
DIMENSIONS
OPTIONAL DEPTH REDUCING COLLAR (B1315P1)
Compact Design in a Modular Package for Easy Maintenance

16. EnerVista MII Setup Software (no-charge)
MIIPC Software provides the following functions:
Logic
Settings
Oscillography
Metering
Powerful Configuration Tool That Get the MIFII up and Running in Minutes

17. COMMUNICATIONS
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 bps. Settable Modbus Slave address.
Use optional MULTINET-FE to get Modbus TCP/IP connection (10MBps)
Compatible with Viewpoint Monitoring Software

18. MIFII - ORDER CODE AC/DC Power Supply
***
AC/DC Power Supply
OPTION TO GET HARSH CONFORMAL COATING – H (last letter of model number)

19. OPTIONAL S1/S2 CASE ADAPTER COLLAR (B1343P1)
MIFII - ACCESSORIES
B1315P1 Depth reducing collar (reduces the mounting depth by 2.45 inches)
B1343P1 S1/S2 case adapting collar for retrofit installations
OPTIONAL S1/S2 CASE ADAPTER COLLAR (B1343P1)