ABB Relion 670 series REC670 - Page 55

Scheme communication
Table 55. Scheme communication logic for distance or overcurrent protection ZCPSCH
Function Range or value Accuracy
Scheme type Intertrip
Permissive Underreach
Permissive Overreach
Blocking
-
Co-ordination time for blocking
communication scheme
(0.000-60.000) s ± 0.5% ± 10 ms
Minimum duration of a 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
-
Table 56. Current reversal and weak-end infeed logic for distance protection ZCRWPSCH
Function Range or value Accuracy
Detection levelphase-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% -
Operate time for current reversal
logic
(0.000-60.000) s ± 0.5% ± 10 ms
Delay time for current reversal (0.000-60.000) s ± 0.5% ± 10 ms
Coordination time for weak-end
infeed logic
(0.000-60.000) s ± 0.5% ± 10 ms
Table 57. 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 ± 0.5% ± 10 ms
Bay control REC670
1MRK511232-BEN E
Pre-configured
Product version: 1.2
ABB 55