Manufacturing for this product has been discontinued. As an alternative, please refer to the Multilin 350 or 889 relays.

The MIW II, a member of the M II Family of Relays, is a digital device that provides directional power and loss of field protection for generators. Operation of the MIW II is based on the calculated direction of 3 phase power flow. The MIW II can be ordered with either one of the following two option packages:

• Four protection elements for directional power
• Three protection elements for directional power, one loss of field element, and one fuse failure element

Features & Benefits

• Configurable logic, curves, I/Os and LEDs
• Flash memory for field upgrades
• Two settings groups
• Password protection for local operation
• Automatic display of information from last 5 faults
• Drawout case for easy maintenance
• AC/DC power supply
• Access via front panel keypad or communication links
• Diagnostic features - event recording and analog/digital oscillography
• Isolated front RS232 serial port

Applications

• Controlling power flow in AC generator applications of any size

Protection & Control

• Available versions are three power protection elements (32_x) for MIWII1000 and four power protection elements for MIWII2000
• Loss of field/excitation protection element (40)
• VT fuse failure protection element (60)
• 6 outputs, four configurable, plus trip and alarm

Monitoring & Metering

• Metering values for Ia, voltage values, P, Q, S, V1, V2, and angle
• 24-event record
• Analog/digital oscillography - 24 cycles at 8 samples per cycle
• Information displayed on last 5 relay trips

User Interface

• 2x16 character LCD display
• 6 LED indicators with 4 configurable in function and in color
• Front RS232 and rear RS485 ports using ModBus® RTU protocol up to 19,200 bps
• EnerVista software - an industry leading suite of software tools that simplifies every aspect of working with GE Multilin devices