ABB REG670 - Page 599

Function Range or value Accuracy
Inverse time
characteristics, see
table 971
3 curve types
See table 971
High and low voltage
limit, voltage
dependent operation,
step 1 - 2
(1.0 - 200.0)% of UBase
±1.0% of U
r
at U ≤ U
r
±1.0% of U at U > U
r
Directional function Settable: NonDir, forward and reverse -
Relay characteristic
angle
(-180 to +180) degrees ±2.0 degrees
Relay operate angle (1 to 90) degrees ±2.0 degrees
Reset ratio,
overcurrent
> 95% -
Reset ratio,
undercurrent
< 105% -
Reset ratio,
overvoltage
> 95% -
Reset ratio,
undervoltage
< 105% -
Overcurrent:
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Impulse margin time 15 ms typically -
Undercurrent:
Critical impulse time 10 ms typically at 2 to 0 x I
set
-
Impulse margin time 15 ms typically -
Overvoltage:
Critical impulse time 10 ms typically at 0.8 to 1.2 x U
set
-
Impulse margin time 15 ms typically -
Undervoltage:
Critical impulse time 10 ms typically at 1.2 to 0.8 x U
set
-
Impulse margin time 15 ms typically -
1MRK502052-UEN B Section 11
Multipurpose protection
593
Technical manual