SEL-701-1 Monitor
Date Code 20011009
Event Analysis
Front-Panel Target LEDs
8.2
Front-Panel Target LEDs
Each front-panel target LED (except the Enabled LED) is controlled through a
SEL
OGIC®
control equation (LED1 through LED7). However, if the setting
FACTLED = Y, the front-panel LEDs will operate as shown in
The LEDs are programmable on the SEL-701-1 Monitor. By setting FACTLOG
and FACTLED to N, a SEL
OGIC
control equation can be entered for each LED through
settings LED1 through LED7. See
through LED7.
Table 8.1
SEL-701-1 Monitor Factory Front-Panel Target LED Definitions
LED Label
Definition
Enabled
Illuminated whenever the monitor is in service. If this LED is
not illuminated, the monitor is out of service. Verify monitor
control power and self-test status.
LED1
(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.
LED2
(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.
LED3
(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.
LED4
(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.
LED5
(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.
LED6
(Frequency)
This LED remains on steadily after a trip that occurs while an
over- or underfrequency element is picked up.
LED7
(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.
Summary of Contents for SEL-701-1
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