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Digital Energy
Multilin
339 Motor Protection System
Chapter 1: Introduction
Overview
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Introduction
The 339 Motor Protection System is a microprocessor based relay providing suitable
protection of medium voltage motors. The small footprint and the withdrawable option
make the relay ideal for panel mounting on either new or retrofit installations. The
combination of proven hardware, a variety of protection and control features, and
communications, makes the relay ideal for total motor protection and control. Equipped
with serial (RS485), USB, and Ethernet ports, and a wide selection of protocols such as
Modbus, DNP3.0, IEC 60870-5-103, 60870-5-104, GOOSE, the relay is the best-in-class for
MCCs, SCADA and inter-relay communications. The relay provides excellent transparency
with respect to power system conditions and events, through its four-line 20-character
display, as well as the EnerVista SR3 Setup program. Conveniently located LEDs provide
indication of overall relay operation, as well as alarm, pickup, and motor status.
The relay provides the following key benefits:
•
Withdrawable small footprint – saves on rewiring and space.
•
Fast setup (Quick Setup) menu provided, to guide users through a wide range of motor
management applications.
•
Large four-line LCD display, LEDs, and an easy-to-navigate keypad.
•
Multiple communication protocols for simultaneous access when integrated into
monitoring and control systems.
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