Status Indicators - GE 239 Instruction Manual

CHAPTER 3: OPERATION
3.1.3

Status Indicators

239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
To maximize the lifetime of the display, its brightness can be varied using the setpoint
S1: 239 SETUP\PREFERENCES\DEFAULT MESSAGE BRIGHTNESS
set brightness level when the default messages are being displayed. If any one of keys
on the 239 keypad is pressed or an alarm/trip is present the display brightness will
automatically become 100%. If the default messages time is set to OFF, the 239 display
will dim to the set brightness level after 5 minutes have elapsed since one of the keys
on the keypad was last pressed.
NOTE: Message brightness control is available only on units with the VFD display.
TRIP
ALARM
TRIP indicator flashes when the 239 has tripped. This will be caused by
• TRIP: The
any trip condition (overload, short circuit etc.) or a serial trip command issued via
the communication port. The indicator and the trip relay are reset manually by
pressing the
RESET
closing the external reset input.
ALARM relay is intended for general purpose alarm outputs. The
• ALARM: The
ALARM indicator will be on while the ALARM relay is operating. If the ALARM is
programmed as unlatched, this indicator will flash as long as the alarm condition
persists. When the condition clears, the
relay has been programmed as latched, the alarm condition can only be cleared by
pressing the
RESET
the external reset input.
AUXILIARY relay is intended for customer specific requirements.
• AUXILIARY: The
AUXILIARY indicator will turn on while the AUXILIARY relay is operating.
The
• SERVICE: Any abnormal condition detected during 239 self-monitoring, such as a
hardware failure, will cause the
programmed to be failsafe (i.e. non-operated state is "Energized," operated state
SERVICE indicator will turn on while the SERVICE relay is
is "De-energized"). The
operating (i.e. de-energized). Loss of control power to the 239 also causes the
SERVICE relay to be de-energized, indicating that no protection is present.
• PICKUP: During testing, for calibration verification, it is useful to have an
indication of when the motor full load or ground trip pickup setting has been
exceeded. Eventually an alarm or a trip will occur if these conditions persist. The
indicator will remain flashing as long as the motor full load setting remains
exceeded while the motor is running or ground current is above the ground trip
pickup level. The indicator will automatically turn off when the phase current
AUXILIARY
SERVICE
FIGURE 3–3: 239 Status Indicators
key, remotely using a computer reset command, or by
ALARM indicator will turn off. If the alarm
key, by issuing a computer reset command, or by closing
SERVICE relay to operate. This relay is
. The display will adjust to
PICKUP
COMMUNICATE
819762A7.CDR
3–3