Thermal Overload Protection, One Time Constant, Celsius/Fahrenheit Lcpttr/Lfpttr; Identification; Functionality - ABB RED650 Technical Manual

Section 8
Current protection
8.5
8.5.1
8.5.2
204
Function
Inverse time characteristics, see Table 660,
Table 662 and Table 664
Second harmonic blocking
Minimum polarizing voltage
Minimum polarizing current
Real part of source Z used for current
polarization
Imaginary part of source Z used for current
polarization
Operate time, start non-directional at 0 to 2 x
I
set
Reset time, start non-directional at 2 x I
0
Operate time, start non-directional at 0 to 10
x I
set
Reset time, start non-directional at 10 x I
to 0
Critical impulse time
Impulse margin time
Thermal overload protection, one time constant,
Celsius/Fahrenheit LCPTTR/LFPTTR

Identification

Function description
Thermal overload protection, one time
constant, Celsius
Thermal overload protection, one time
constant, Fahrenheit

Functionality

The increasing utilization of the power system closer to the thermal limits has
generated a need of a thermal overload protection for power lines.
Range or value
16 curve types
(5–100)% of fundamental
(1–100)% of UBase
(2-100)% of IBase
(0.50-1000.00) W/phase
(0.50–3000.00) W/phase
Min. = 15 ms
Max. = 30 ms
to Min. = 15 ms
set
Max. = 30 ms
Min. = 5 ms
Max. = 20 ms
Min. = 20 ms
set
Max. = 35 ms
10 ms typically at 0 to 2 x I
15 ms typically
IEC 61850 IEC 60617
identification identification
LCPTTR
LFPTTR
Line differential protection RED650 2.2 IEC
1MRK 505 394-UEN A
Accuracy
See Table 660,
Table 662 and
Table 664
±2.0% of I
r
±0.5% of U
r
±1.0% of I
r
-
-
-
-
-
-
-
set
-
IP14512-1 v7
M17106-1 v7
ANSI/IEEE C37.2
device number
26
26
M12020-4 v14
Technical manual