ABB Relion 670 Series Product Manual page 85

Line differential protection RED670 2.0
Product version: 2.0
Table 75. Current reversal and weak-end infeed logic for phase segregated communication ZC1WPSCH
Function
Detection level phase to neutral
voltage
Detection level phase to phase
voltage
Reset ratio
Operate time for current reversal
Delay time for current reversal
Coordination time for weak-end
infeed logic
Table 76. Scheme communication logic for residual overcurrent protection ECPSCH
Function
Scheme type
Communication scheme
coordination time
Table 77. Current reversal and weak-end infeed logic for residual overcurrent protection ECRWPSCH
Function
Operate mode of WEI logic
Operate voltage 3U0 for WEI trip
Operate time for current reversal
logic
Delay time for current reversal
Coordination time for weak-end
infeed logic
ABB
Range or value
(10-90)% of UBase
(10-90)% of UBase
<105% at (20-90)% of UBase
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
Range or value
Permissive Underreaching
Permissive Overreaching
Blocking
(0.000-60.000) s
Range or value
Off
Echo
Echo & Trip
(5-70)% of UBase
(0.000-60.000) s
(0.000-60.000) s
(0.000–60.000) s
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
Accuracy
-
±0.2% or ±20 ms whichever is greater
Accuracy
-
± 0.5% of U
r
± 0.2% or ±30 ms whichever is greater
± 0.2% or ±30 ms whichever is greater
± 0.2% or ±30 ms whichever is greater
1MRK505310-BEN C
85