ABB Relion 670 series - Page 119

M16039-1 v16
Table 92. Current reversal and weak-end infeed logic for distance protection ZCRWPSCH
Function Range or value Accuracy
Detection level phase-to-
neutral voltage
(10-90)% of UBase ±0.5% of U
r
Detection level phase-to-phase
voltage
(10-90)% of UBase ±0.5% of U
r
Operate time for current
reversal logic
(0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Delay time for current reversal (0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Coordination time for weak-
end infeed logic
(0.000-60.000) s ±0.2% or ±15 ms whichever is greater
SEMOD166938-2 v6
Table 93. Current reversal and weak-end infeed logic for phase segregated communication ZC1WPSCH
Function Range or value Accuracy
Detection level phase to
neutral voltage
(10-90)% of UBase ±0.5% of U
r
Detection level phase to phase
voltage
(10-90)% of UBase ±0.5% of U
r
Reset ratio <105% at (20-90)% of UBase -
Operate time for current
reversal
(0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Delay time for current reversal (0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Coordination time for weak-
end infeed logic
(0.000-60.000) s ±0.2% or ±15 ms whichever is greater
M16049-1 v10
Table 94. Scheme communication logic for residual overcurrent protection ECPSCH
Function Range or value Accuracy
Scheme type Permissive Underreaching
Permissive Overreaching
Blocking
-
Communication scheme
coordination time
(0.000-60.000) s ±0.2% or ±20 ms whichever is greater
GUID-CC9A02C2-AAE8-4B8C-A091-D4ED584A2EA7 v1
Table 95. Local acceleration logic ZCLCPSCH
Function Range or value Accuracy
Operate current, LoadCurr (1–100)% of IBase ±1.0% of I
r
Operate current, MinCurr (1–100)% of IBase ±1.0% of I
r
Delay time on pick-up for current release (0.000–60.000) s ±0.2% or ±35 ms whichever is greater
Delay time on drop-off for current release (0.000–60.000) s ±0.2% or ±35 ms whichever is greater
Delay time on pick-up for MinCurr value (0.000–60.000) s ±0.2% or ±35 ms whichever is greater
Line differential protection RED670
1MRK 505 379-BEN N
Version 2.2
Hitachi Power Grids 119
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