Hitachi Relion 670 Series Product Manual page 63

Phasor measurement unit RES670
Version 2.2
Voltage protection
Table 39. 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 150
Definite time delay, step 1 at 1.2 x U
0
Definite time delay, step 2 at 1.2 x U
0
Minimum operate time, inverse
characteristics
Operate time, start at 2 x U
set
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 Energy
Range or value
(1.0–100.0)% of UBase
(0.0–50.0)% of UBase
(1–50)% of UBase
-
to (0.00-6000.00) s
set
to (0.000-60.000) s
set
(0.000–60.000) s
to 0 Min. = 15 ms
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
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M13290-1 v16
Accuracy
±0.5% of U
r
±0.5% of U
r
±0.5% of U
r
See table 150
±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 511 410-BEN P
63