Schweitzer Engineering Laboratories SEL-701 - Front-Panel Target Leds; SEL-701 Relay Front-Panel Target LED Definitions; Table 9.1

701 Motor Protection Relay Date Code 20010719
Event Analysis
Front-Panel Target LEDs
9.2
Front-Panel Target LEDs
Table 9.1 SEL -701 Relay Fron t-Panel Target LED D efinitions
Table 9.1 SEL-701 Relay Front-Panel Target LED Definitions
LED Label Definition
Relay Enabled
Illuminated whenever the relay is in service. If this LED is not
illuminated, the relay is out of service. Verify relay control power
and self-test status.
Motor
Energized
This LED remains off while the motor is stopped, flashes
while the motor is starting, and remains on while the motor is
running.
Thermal
Overload
This LED flashes when the thermal element reaches the alarm
level, or if any monitored, healthy RTD exceeds its alarm
temperature.
This LED remains on steadily after a thermal element trip,
load jam trip, speed switch trip, or RTD temperature trip.
Overcurrent This LED remains on steadily after a trip due to a short circuit
fault detected by a phase, negative-sequence, residual, or neutral
overcurrent element.
Unbalance This LED flashes when the current unbalance alarm
element picks up.
This LED remains on steadily after a trip while the current
unbalance element is picked up or after a phase reversal trip.
Load Loss This LED flashes when a load loss alarm occurs
or if the underpower alarm element picks up.
This LED remains on steadily after a load loss trip or
a trip while the underpower element is picked up.
Voltage This LED flashes when a power factor or reactive
power alarm occurs.
This LED remains on steadily after a power factor or reactive
power trip or a trip that occurs while an undervoltage or overvoltage
element is picked up.
Frequency This LED remains on steadily after a trip that occurs
while an over- or underfrequency element is picked up.