ABB REL650 User Manual

CRG
t
200 ms
1
tSecurity
t
150 ms
>1
CR
CRL
LCG
AND
OR
t
AND
en05000746.vsd
IEC05000746 V1 EN-US
Figure 233: Guard signal logic with unblocking scheme
The unblocking function can be set in three operation modes (setting Unblock):
Off: The unblocking function is out of operation
No restart: Communication failure shorter than tSecurity will be ignored
If CRG disappears, a CRL signal will be transferred to the trip logic
There will not be any information in case of communication failure (LCG)
Restart Communication failure shorter than tSecurity will be ignored
It sends a defined (150 ms) CRL after the disappearance of the CRG signal
The function will activate LCG output in case of communication failure
If the communication failure comes and goes (<200 ms) there will not be recurrent
signaling
12.4.7 Technical data
M16049-1 v10
Table 268: ECPSCH technical data
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
12.5 Current reversal and weak-end infeed logic for
residual overcurrent protection ECRWPSCH
IP14365-1 v4
12.5.1 Identification
M14883-1 v2
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current reversal and weak-end infeed
logic for residual overcurrent protection
ECRWPSCH - 85
1MRK 506 382-UEN A Section 12
Scheme communication
Line distance protection REL650 2.2 IEC 455
Technical manual

ABB REL650 Specifications

General

Brand	ABB
Model	REL650
Category	Protection Device
Language	English