Hitachi Relion 670 Series Product Manual page 113
Line differential protection
Hide thumbs
Also See for Relion 670 Series:
- Applications manual (438 pages) ,
- Commissioning manual (284 pages) ,
- Product manual (121 pages)
Table of Contents
Advertisement
Line differential protection RED670
Version 2.2
Table 76. Two step overvoltage protection OV2PTOV
Function
Operate voltage, step 1 and 2
Absolute hysteresis
Inverse time characteristics for steps 1 and
2, see table
229
Definite time delay, low step (step 1) at 0 to
1.2 x U
set
Definite time delay, high step (step 2) at 0
to 1.2 x U
set
Minimum operate time, Inverse
characteristics
Operate time, start at 0 to 2 x U
Reset time, start at 2 x U
set
Operate time, start at 0 to 1.2 x U
Reset time, start at 1.2 x U
set
Critical impulse time
Impulse margin time
Hitachi Energy
Range or value
(1.0-200.0)% of UBase
(0.0–50.0)% of UBase
-
(0.00 - 6000.00) s
(0.000-60.000) s
(0.000-60.000) s
Min. = 15 ms
set
Max. = 30 ms
to 0
Min. = 15 ms
Max. = 30 ms
Min. = 20 ms
set
Max. = 35 ms
to 0
Min. = 5 ms
Max. = 25 ms
10 ms typically at 0 to 2 x U
15 ms typically
© 2017 - 2022 Hitachi Energy. All rights reserved
M13304-1 v15
Accuracy
±0.5% of U
at U ≤ U
r
±0.5% of U at U > U
±0.5% of U
at U ≤ U
r
±0.5% of U at U > U
See table
229
±0.2% or ±45 ms whichever is greater
±0.2% or ±45 ms whichever is greater
±0.2% or ±45 ms whichever is greater
-
-
-
-
-
set
-
1MRK 505 379-BEN R
r
r
r
r
113
Advertisement
Table of Contents
