269Plus Motor Management Relay

Offering optimum motor

protection in situations where

other relays cannot, the 269 Plus

Motor Management Relay

possess the unique feature of its

ability to “learn” individual

motor parameters, giving it the

flexibility to adapt to each

application by “learning” values

of motor inrush current, negative

sequence current K factor, cool

down rates, start thermal capacity

and acceleration time.

Motor is protected under both Acceleration and Running

conditions

The 269 Plus can trigger an alarm or trip the motor based on:

= normal acceleration time

= number of starts per hour

= multiple starts

= time between starts

= motor overload conditions

The Thermal Model within the 269Plus has the ability to compute

the motor I2t value based on actual motor load current.

= thermal model calculates value in terms of thermal capacity used

= RTDs (resistance temperature units) measuring stator temperature

act as a thermal capacity check to confirm value calculated by

thermal model. RTDs may be used for monitoring stator, bearing,

ambient, or other temperature monitoring.

= thermal capacity used is then updated to reflect the higher of the

two values

MAIN

MotorMatch modifies the initially entered relay parameters

to match actual measured motor characteristics. The key

elements include:

= accumulated I2t in the memory

= RTD input to the memory

= learned cooldown time from run to stop

= learned cooldown time from runoverload

to run-normal

= learned acceleration time

= learned negative sequence contribution (K-factor)

Actual Values

average and individual phase currents

= RTD temperatures (hottest, individual, maximum)

= unbalance ratio (%In/Ip)

= ground leakage current

= thermal capacity remaining / estimated time to trip

at present overload level

= motor load as a percent of full load

= phase to phase or phase to neutral voltage voltage

(meter option)

= W, var, Mwhr, PF, Hz (meter option)

4 Output Relay Contacts

= Trip Relay as main latched output relay

= Alarm output relay (latched or unlatched)

= Auxiliary 1 output relay (latched or unlatched)

= Auxiliary 2 output relay

== Analog output

= Used to indicate one of motor thermal capacity used,

motor current, hottest stator RTD, bearing RTD or CT

secondary current

Speed Switch Input

== Differential Relay Input

== Spare Input

= enables the user to use an external speed device

= provided terminals to accept contact closure from an external

differential relay

= all protective functions grouped through one main relay

= spare input terminals configurable to represent either a standard contact input

(ie-pressure switch), or a specific contact input (circuit breaker/contactor status)

= 52b contact from a circuit breaker = positive identification of the position of the

breaker(open or closed)

Statistical Data (StatTracTM)

= StatTracTM provides statistical data of motor use for

operations monitoring, maintenance, and fault diagnosis.

= Using the Keypad, the user can display:

Monitoring

= running hours and number of starts since last commissioning

= number of all trips

= number of specific types of trips

= total Watt-hours (with meter option