ABB 650 series, Technical Manual

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Function Range or value Accuracy
Relay open angle ROA (0-90) degrees
±
2.0 degrees
Operate time, non-directional
residual over current
60 ms typically at 0 to 2 x I
set
60 ms typically at 0 to 2 x 1
set
Reset time, non-directional
residual over current
65 ms typically at 2 to 0 x I
set
65 ms typically at 2 to 0 x 1
set
Operate time, non-directional
residual overvoltage
45 ms typically at 0.8 to 1.5 x U
set
45 ms typically at 0.8 to 1.5 x U
set
Reset time, non-directional
residual overvoltage
85 ms typically at 1.2 to 0.8 x U
set
85 ms typically at 1.2 to 0.8 x U
set
Operate time, directional
residual over current
140 ms typically at 0.5 to 2 x I
set
-
Reset time, directional
residual over current
85 ms typically at 2 to 0.5 x I
set
-
Critical impulse time non-
directional residual over
current
35 ms typically at 0 to 2 x I
set
-
Impulse margin time non-
directional residual over
current
25 ms typically -
8.4 Thermal overload protection, two time constants
TRPTTR (49)
8.4.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Thermal overload protection, two time
constants
TRPTTR
SYMBOL-A V1 EN
49
8.4.2 Functionality
If a power transformer or generator reaches very high temperatures the equipment might
be damaged. The insulation within the transformer/generator will have forced ageing. As
a consequence of this the risk of internal phase-to-phase or phase-to-ground faults will
increase. High temperature will degrade the quality of the transformer/generator
insulation.
Section 8
1MRK 502 048-UUS A
Current protection
234
Technical manual