ABB Relion 670 series, Technical Reference Manual

Page: 461 / 1232

7.7.5 Setting parameters
Table 217: LPTTR (26) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
IBase 0 - 99999 A 1 3000 Base current in A
TRef 0 - 600 Deg 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 0 - 1000 Min 1 45 Time constant of the line in minutes.
AlarmTemp 0 - 200 Deg 1 80 Temperature level for pickup (alarm)
TripTemp 0 - 600 Deg 1 90 Temperature level for trip
ReclTemp 0 - 600 Deg 1 75 Temperature for reset of lockout after trip
tPulse 0.05 - 0.30 s 0.01 0.1 Operate pulse length. Minimum one
execution cycle
AmbiSens Disabled
Enabled
- - Disabled External temperature sensor availiable
DefaultAmbTemp -50 - 250 Deg 1 20 Ambient temperature used when AmbiSens is
set to Off.
DefaultTemp -50 - 600 Deg 1 50 Temperature raise above ambient
temperature at startup
1MRK505222-UUS C
Section 7
Current protection
455
Technical reference manual