Scheme communication
M16038-1 v11
Table 62. Scheme communication logic for distance or overcurrent protection ZCPSCH
Function Range or value Accuracy
Scheme type Off
Intertrip
Permissive UR
Permissive OR
Blocking
DeltaBlocking
-
Operate voltage, Delta U (0–100)% of UBase ±5.0% of ΔU
Operate current, Delta I (0–200)% of IBase ±5.0% of ΔI
Operate zero sequence voltage,
Delta 3U0
(0–100)% of UBase ±10.0% of Δ3U0
Operate zero sequence current,
Delta 3I0
(0–200)% of IBase ±10.0% of Δ3I0
Co-ordination time for blocking
communication scheme
(0.000-60.000) s ±0.5% ±10 ms
Minimum duration of a carrier send
signal
(0.000-60.000) s ±0.5% ±10 ms
Security timer for loss of guard
signal detection
(0.000-60.000) s ±0.5% ±10 ms
Operation mode of unblocking logic Off
NoRestart
Restart
-
M16039-1 v14M16049-1 v9
Table 63. 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
M16051-2 v11
Table 64. 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 511 361-BEN B
Bay control REC670 2.1 IEC
Product version: 2.1
ABB 73
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