Technical Data - ABB REL650 series Technical Manual

Section 12
Scheme communication
12.5.7
522
CR
NOT
CR_GUARD
200 ms
0
ANSI05000746 V1 EN
Figure 247: Guard signal logic with unblocking scheme
The unblocking function can be set in three operation modes (setting Unblock):
Disabled: The unblocking function is out of operation
No restart: Communication failure shorter than
If CR_GUARD 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
It sends a defined (150 ms) CRL after the disappearance of the CR_GUARD 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

Technical data

Table 356: ECPSCH (85) technical data
Function
Scheme type
Communication scheme
coordination time
Minimum duration of a send
signal
Security timer for loss of carrier
guard detection
0-tSecurity
0
150 ms
OR
AND
0
tSecurity will be ignored
tSecurity will be ignored
Range or value
Disabled
Intertrip
Permissive UR
Permissive OR
Blocking
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
1MRK 506 335-UUS A
CRL
OR
AND
LCG
en05000746_ansi.vsd
Accuracy
-
± 0.5% ± 25 ms
± 0.5% ± 25 ms
± 0.5% ± 25 ms
Technical manual