Table 1-1 Model 269 Relay Features - GE MULTILIN 269 MOTOR MANAGEMENT RELAY Series Instruction Manual

1 INTRODUCTION

Table 1-1 Model 269 Relay Features

Protection Features
- Overloads
- Stator Winding Overtemperature (Alarm, High Alarm and Trip)
- Multiple Starts
- Short Circuit
- Locked Rotor
- Rapid Trip/Mechanical Jam
- Unbalance/Single Phasing
- Ground Fault (Alarm and Trip)
- Bearing Overtemperature (Alarm and Trip)
- Undercurrent (Alarm and Trip)
- Variable Lock-Out Time
- Phase Reversal (Meter Option)
Operational Features
- Microcomputer controlled
- Keypad programmable
- 48 character alphanumeric display
- Built-in "HELP" function
- Eight selectable standard overload curves
- Continual relay circuitry self-check
Monitoring and Display Features
- Negative sequence phase current unbalance measurement
- Ground fault (earth leakage) current measurement
- Up to six stator RTD inputs
- Two additional RTD inputs
- Monitoring of motor ambient air temperature
- Display of all SETPOINTS or ACTUAL VALUES upon request
- Display of relay TRIP/ALARM and HELP messages
Communications and Control Features
- One latched, main trip relay
- One alarm relay
- Two auxiliary relays
- Emergency restart capability
- Pre-trip alarm warnings
- 4-20mA output of motor current as a percentage of full load, motor thermal capacity, hottest stator RTD tem-
perature, percentage of phase CT secondary current, or bearing RTD
Statistical and Memory Features
- Recall of all pre-trip motor values
- Tamperproof setpoints stored in non-volatile memory
- Microcomputer "learns" motor inrush current
- Accumulation of motor running hours
Voltage and Power Metering (available with MPM)
- Display of 3 phase or line voltages, kWatts, kVars, Power Factor, and frequency.
- Protection features based on Voltage, Power Factor, kVars, and voltage sensed phase reversals.
- Pre-trip values of average voltage, kWatts, kVars, Power Factor, and frequency.
- Accumulated MegaWattHours.
4. Protection for loss of suction for pumps or loss of
air flow for fans using the undercurrent feature.
5. Protection of motor and load bearings from exces-
sive heat buildup due to mechanical wear.
6. Protection of motors operated in environments with
varying ambient temperatures.
7. Complete protection, allowing maximum motor
utilization with minimum downtime, for all AC mo-
tors.
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