Hitachi Relion REL670 Product Manual page 118

Line distance protection REL670
Version 2.2
Scheme communication
Table 88. 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 89. 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 90. 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
118
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 506 372-BEN Q
Hitachi Energy