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NHP TemBreak PRO P - Alarms & Indication; System Alarms

NHP TemBreak PRO P
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38
TemBreak PRO P_BE-UM-001-EN V1.3.0
Alarms & Indication
The P_BE OCR provides alarming for various types of events based on system status and live monitoring of parameters. There are three types of alarms to
indicate OCR health and trip status:
-
System alarm: Correspond to predefined events internal to the OCR.
-
Trip alarm: Provide warning about trip events.
-
Pre-Trip alarm (PTA): Provides a warning about the imminent trip risk due to a current overload. It is associated with the PTA output contact.
Indicators in the form of LEDs on the front display various operational status changes and alarms for P_BE OCR.
Alarm/Status type
Indication
LED Status
Description
OCR Temperature Alarm
RED Solid
Internal OCR temperature > 105°C
LTD Pick-up Alarm
OFF
Current < 105% x Ir
RED Flashing
Current ≥ 105% x Ir
RED Solid
Current ≥ 112.5% x Ir
PTA (Pre-Trip Alarm)
OFF
Current < 80% x I
r
ORANGE Flashing
Current ≥ 80% x I
r
ORANGE Solid
PTA output activated
OCR Status
GREEN Solid
OCR operating normally
ORANGE Flashing
Internal OCR fault detected
System Alarms
System alarms are produced as a result of either an internal OCR error, or overtemperature of the OCR itself.
OCR Temperature: The P_BE OCR constantly monitors its internal temperature. In the event that the temperature exceeds 105°C, the OCR temperature
alarm is activated and the OCR Temperature Alarm LED illuminates solid red. The alarm features a lower hysteresis threshold, which
keeps the alarm active until the internal temperature of the OCR drops below 100°C.
Internal OCR error: The P_BE OCR constantly monitors its protection function. In the event of an operating fault concerning the electronics of the OCR,
the Internal trip unit error alarm is activated and the OCR Status LED flashes orange.
Alarm/Status type
LED Status
Description
OCR Temperature Alarm
OFF
Internal OCR temperature < 105°C
RED Solid
Internal OCR temperature > 105°C
OCR Status
GREEN Solid
OCR operating normally
ORANGE Flashing
Internal OCR fault detected

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