Name Type Default Description
AMBTEMP REAL 0 Ambient temperature from external temperature
sensor
SENSFLT BOOLEAN 0 Validity status of ambient temperature sensor
RESET BOOLEAN 0 Reset of internal thermal load counter
PID-3908-OUTPUTSIGNALS v7
Table 69: LCPTTR Output signals
Name Type Description
TRIP BOOLEAN Trip
START BOOLEAN Start Signal
ALARM BOOLEAN Alarm signal
LOCKOUT BOOLEAN Lockout signal
PID-3909-OUTPUTSIGNALS v8
Table 70: LFPTTR Output signals
Name Type Description
TRIP BOOLEAN Trip
START BOOLEAN Start Signal
ALARM BOOLEAN Alarm signal
LOCKOUT BOOLEAN Lockout signal
6.6.5 Settings
PID-3908-SETTINGS v7
Table 71: LCPTTR Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation Off / On
TRef 0 - 300 Deg C 1 90 End temperature rise above ambient of
the line when loaded with IRef
IRef 0 - 400 %IB 1 100 The load current (in % of IBase) leading
to TRef temperature
IMult 1 - 5 - 1 1 Current multiplier when function is used
for two or more lines
Tau 1 - 1000 Min 1 45 Time constant of the line in minutes.
AlarmTemp 0 - 200 Deg C 1 80 Temperature level for start (alarm)
TripTemp 0 - 300 Deg C 1 90 Temperature level for trip
ReclTemp 0 - 300 Deg C 1 75 Temperature for reset of lockout after trip
tPulse 0.05 - 0.30 s 0.01 0.10 Operate pulse length. Minimum one
execution cycle
Table continues on next page
Section 6 1MRK 505 384-UEN A
Current protection
142 Breaker protection REQ650 2.2 IEC
Technical manual
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