ABB Relion 670 Series Product Manual page 91

Generator protection REG670
Version 2.2
Voltage protection
Table 70. Two step undervoltage protection UV2PTUV
Function
Operate voltage, low and high step
Absolute hysteresis
Internal blocking level, step 1 and step
2
Inverse time characteristics for step 1
and step 2, see table 191
Definite time delay, step 1 at 1.2 x U
to 0
Definite time delay, step 2 at 1.2 x U
to 0
Minimum operate time, inverse
characteristics
Operate time, start at 2 x U
Reset time, start at 0 to 2 x U
Operate time, start at 1.2 x U
Reset time, start at 0 to 1.2 x U
Critical impulse time
Impulse margin time
Hitachi Power Grids
Range or value
(1.0–100.0)% of
(0.0–50.0)% of
UBase
(1–50)% of
-
(0.00-6000.00) s
set
(0.000-60.000) s
set
(0.000–60.000) s
to 0 Min. = 15 ms
set
Max. = 30 ms
Min. = 15 ms
set
Max. = 30 ms
to 0 Min. = 5 ms
set
Max. = 25 ms
Min. = 15 ms
set
Max. = 35 ms
5 ms typically at 1.2 x U
15 ms typically
© Copyright 2017 Hitachi Power Grids. All rights reserved
M13290-1 v15
Accuracy
UBase
±0.5% of U
r
UBase
±0.5% of U
r
±0.5% of U
r
See table 191
±0.2% or ±40ms whichever is greater
±0.2% or ±40ms whichever is greater
±0.5% or ±40ms whichever is greater
-
-
-
-
to 0 -
set
-
1MRK 502 074-BEN M
91