ABB REL670 - Page 96

Table 83. 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
Table 84. 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
Table 85. 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
Table 86. Current reversal and weak-end infeed logic for residual overcurrent protection ECRWPSCH
Function
Range or value Accuracy
Operate mode of WEI logic Off
Echo
Echo & Trip
-
Operate voltage 3U0 for WEI trip (5-70)% of UBase ±0.5% of U
r
Operate time for current reversal
logic
(0.000-60.000) s ±0.2% or ±30 ms whichever is greater
Delay time for current reversal (0.000-60.000) s ±0.2% or ±30 ms whichever is greater
Coordination time for weak-end
infeed logic
(0.000–60.000) s ±0.2% or ±30 ms whichever is greater
1MRK 506 372-BEN -
Line distance protection REL670 2.2
Product version: 2.2
96 ABB