369 Motor Management Relay Instruction Manual

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 Relay 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 Relay’s protective capabilities.

The 369 Relay offers optimum motor protection where other relays cannot, by using the

FlexCurve™ custom overload curve, or one of the fifteen standard curves.

The 369 Relay 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 Relay 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 Relay 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 Relay to detect the flow reversal of a

pump motor and enable timely and safe motor restarting. All 369 Relay options are

available when ordering the relay from the factory. Field upgrades are only available for

the relay when the required hardware is installed in the relay from the factory. Field

upgrades are via an option enabling passcode available from GE Multilin, which is unique

to each relay and option. Any hardware modifications made to the relay in the field will

void the product warranty and will not be supported by GE Multilin.

1. One Analog Output is available with the 369 base model. The other three Analog

Outputs can be obtained by purchasing the metering or backspin options.

The control power (HI or LO) must be specified with all orders. If a feature is not

required, a 0 must be placed in the order code. All order codes have 10 digits. The 369

is available in a non-drawout version only.

Examples: 369-HI-R-0-0-0-0-E: 369 with HI voltage control power and 12 RTD

inputs, and enhanced diagnostics

369-LO-0-M-0-0-0-E: 369 relay with LO voltage control power and metering

option, and enhanced diagnotics

2. Features available only in Enhanced option (E)

• Enhanced faceplate with motor status indicators

• Motor Health Report

• Enhanced learned data

• Motor Start Data Logger

• Enhanced event recorder

• Security audit trail events

1.3 Accessories

EnerVista 369 Setup software: Setup and monitoring software provided free with each

relay.

RRTD: Remote RTD Module. Connects to the 369 Relay via a fibre optic or

RS485 connection. Allows remote metering and programming for up

to 12 RTDs.

F485: Communications converter between RS232 and RS485 / fibre optic.

Interfaces a PC to the relay.

CT: 50, 75, 100, 150, 200, 300, 350, 400, 500, 600, 750, 1000 (1 A or 5 A

secondaries)

HGF: Ground CTs (50:0.025) used for sensitive earth fault detection on high

resistance grounded systems.

515: Blocking and test module. Provides effective trip blocking and relay

isolation.

DEMO: Metal carry case in which 369 is mounted.

FPC15: Remote faceplate cable, 15'.

1.1.4 Firmware History

Guideform Specifications

Motor protection and management shall be provided by a digital relay. Protective functions

include:

• phase overload standard curves (51)

• overload by custom programmable curve (51)

• I2t modeling (49)

• current unbalance / single phase detection (46)

• starts per hour and time between starts

• short circuit (50)

• ground fault (50G/50N 51G/51N)

• mechanical jam / stall

• two-speed motor protection

Optional functions include:

• under / overvoltage (27/59)

• phase reversal (47)

• underpower (37)

• power factor (55)

• stator / bearing overtemperature with twelve (12) independent RTD inputs (49/38)

• backspin detection

Management functions include:

• statistical data

• pre-trip data (last 40 events)

• ability to learn, display and integrate critical parameters to maximize motor

protection

• a keypad with 40 character display

• flash memory

The relay is capable of displaying important metering functions, including phase voltages,

kilowatts, kvars, power factor, frequency and MWhr. In addition, undervoltage

and low power factor alarm and trip levels are field programmable. The communications

interface include one front RS232 port and three independent rear RS485 ports

with supporting PC software, thus allowing easy setpoint programming, local retrieval

of information and flexibility in communication with SCADA and engineering workstations.

51 OVERLOAD/STALL/THERMAL MODEL

Curve Shape: ....................................................1 to 15 standard, custom