369 MOTOR MANAGEMENT RELAY – QUICKSTART GUIDE
1–1
369 Motor Management Relay
Chapter 1: Introduction
GE Consumer & Industrial
Multilin
Introduction
1.1
Ordering
1.1.1
General Overview
The 369 Motor Management Relay is a digital relay that provides protection and
monitoring for three phase motors and their associated mechanical systems. A unique
feature of the 369 is its ability to ‘learn’ individual motor parameters and to adapt itself to
each application. Values such as motor inrush current, cooling rates and acceleration time
may be used to improve the 369’s protective capabilities.
The 369 offers optimum motor protection where other relays cannot, by using the
FlexCurve™ custom overload curve, or one of the fifteen standard curves.
The 369 has one RS232 front panel port and three RS485 rear ports. The Modbus RTU
protocol is standard to all ports. Setpoints can be entered via the front keypad or by using
the EnerVista 369 Setup software and a computer. Status, actual values and
troubleshooting information are also available via the front panel display or via
communications.
As an option, the 369 can individually monitor up to 12 RTDs. These can be from the stator,
bearings, ambient or driven equipment. The type of RTD used is software selectable.
Optionally available as an accessory is the remote RTD module which can be linked to the
369 via a fibre optic or RS485 connection.
The optional metering package provides VT inputs for voltage and power elements. It also
provides metering of V, kW, kvar, kVA, PF, Hz, and MWhrs. Three additional user
configurable analog outputs are included with this option along with one analog output
included as part of the base unit.
The Back-Spin Detection (B) option enables the 369 to detect the flow reversal of a pump
motor and enable timely and safe motor restarting. 369 options are available when
ordering the relay or as upgrades to the relay in the field. Field upgrades are via an option
enabling passcode available from GE Multilin, which is unique to each relay and option.
