Alarms
68
TemBreak
PRO
P_SE-UM-001-EN
– V1.2.0
System Alarms
System alarms are produced as a result of at least one of the following pre-defined events, which are not user configurable:
-
Internal OCR error
-
OCR temperature alarm
-
Disconnection of neutral
Internal OCR error:
The P_SE 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.
OCR Temperature:
The P_SE OCR constantly monitors its internal temperature.
In the event that the temperature exceeds 105°C, the
OCR
temperature alarm
is activated and a pop-up appears on the P_SE embedded display and TPED where used. The alarm
features a lower hysteresis threshold, which keeps the alarm active until the internal temperature of the OCR drops below
100°C.
Disconnection of Neutral:
Only available on
MCCB’s with Neutral reference (3Ph+N)
. This alarm is activated if the neutral pole is disconnected and if
this alarm has been assigned to the OAC output contact. A disconnected neutral in the network supply may produce a
dangerous increase in Phase-Neutral voltage in unbalanced 3-phase systems. This sustained overvoltage can result in
damage to equipment and insulation and poses a safety risk to personnel. Neutral disconnection detection is based on
monitoring a threshold Ph-N overvoltage of approximately 275 Vac with a time delay as defined by standard EN 50550 for
a rated Ph-N voltage of 230 V.
These alarms are identified by LEDs or pop-ups depending on the trip unit version and display used:
Alarm/Status type
P_SE OCR display
notification
Front LED
Indication
Notes
Internal OCR Error
─
✓
-
GREEN Solid:
OCR operating normally
ORANGE Flashing: Internal OCR fault detected
OCR Temperature
✓
─
Internal OCR temperature > 105°C
Disconnection of Neutral
(OAC)
✓
─
Alarm programmed to OAC activated
Notice
: Disconnection of Neutral alarm is only indicated by assigning it to the OAC (Optional Alarm Contact), in
which case it will display as an OAC alarm. Other system alarms can be assigned to the OAC, however, only
one at a time is possible. Refer to
section.
Summary of Contents for Terasaki TemBreak PRO P SE Series
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