Hitachi Relion 670 Series Product Manual page 128
Line differential protection
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Also See for Relion 670 Series:
- Applications manual (438 pages) ,
- Commissioning manual (284 pages) ,
- Product manual (121 pages)
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Line differential protection RED670
Version 2.2
Scheme communication
Table 93. Scheme communication logic for distance or overcurrent protection ZCPSCH
Function
Scheme type
Operate voltage, Delta U
Operate current, Delta I
Operate zero sequence voltage,
Delta 3U0
Operate zero sequence current,
Delta 3I0
Co-ordination time for blocking
communication scheme
Minimum duration of a carrier send
signal
Security timer for loss of guard
signal detection
Operation mode of unblocking logic
Table 94. Phase segregated scheme communication logic for distance protection ZPCPSCH
Function
Scheme type
Co-ordination time for blocking
communication scheme
Minimum duration of a carrier send
signal
Table 95. Current reversal and weak-end infeed logic for distance protection ZCRWPSCH
Function
Detection level phase-to-neutral
voltage
Detection level phase-to-phase
voltage
Operate time for current reversal
logic
Delay time for current reversal
Coordination time for weak-end
infeed logic
128
M16038-1 v15
Range or value
Off
Intertrip
Permissive UR
Permissive OR
Blocking
DeltaBlocking
(0–100)% of UBase
(0–200)% of IBase
(0–100)% of UBase
(0–200)% of IBase
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
Off
NoRestart
Restart
SEMOD166936-2 v8
Range or value
Intertrip
Permissive UR
Permissive OR
Blocking
(0.000-60.000) s
(0.000-60.000) s
M16039-1 v16
Range or value
(10-90)% of UBase
(10-90)% of UBase
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
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Accuracy
-
±5.0% of ΔU
±5.0% of ΔI
±10.0% of Δ3U0
±10.0% of Δ3I0
±0.2% or ±15 ms whichever is greater
±0.2% or ±45 ms whichever is greater
±0.2% or ±15 ms whichever is greater
-
Accuracy
-
±0.2% or ±15 ms whichever is greater
±0.2% or ±15 ms whichever is greater
Accuracy
±0.5% of U
r
±0.5% of U
r
±0.2% or ±15 ms whichever is greater
±0.2% or ±15 ms whichever is greater
±0.2% or ±15 ms whichever is greater
1MRK 505 379-BEN R
Hitachi Energy
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