ABB Relion 650 Series Technical Manual page 353

1MRK 506 326-UUS B
An undervoltage criteria is used as an additional tripping criteria, when the tripping of the local
breaker is selected, setting
been issued by the echo logic, see figure 185.
Information from the open circuit breaker can be connected to the input CBOPEN to avoid WEI-trip
if the circuit breaker already was opened.
WEI = Echo&Trip
CBOPEN
STV_AG
STV_BG
STV_CG
ANSI10000261 V2 EN-US
Figure 185: Tripping part of the WEI logic, simplified diagram
11.2.7 Technical data
Table 281: ZCWSPSCH (85) Technical data
Function
Operating mode of WEI logic
Detection level phase-to-neutral
voltage
Reset ratio
Operate time for current reversal
logic
Delay time for current reversal
Coordination time for weak-end
infeed logic
Line distance protection REL650
Technical manual
WEI = Echo & Trip, together with the WEI function and ECHO signal has
ECHOL - cont.
OR
AND
100ms
0
Range or value
Disablee
Echo
Echo & Trip
(10-90)% of
<105%
(0.000-60.000) s
(0.00-6000.00) s
(0.000-60.000) s
© Copyright 2011 ABB Power Grids. All rights reserved
OR
AND 0
15ms
AND
0
15ms
AND
0
15ms
rt_of_the_WEI_logic_simp
Accuracy
-
VBase ± 0.5% of V
-
± 0.5% ± 10 ms
± 0.5% ± 10 ms
± 0.5% ± 10 ms
Section 11
Scheme communication
TRWEI
TRWEI_A
TRWEI_B
TRWEI_C
ZCWSPSCH_Tripping_pa
lified_diagram=ANSI1000
0261=1=en=Original.vsd
GUID-514AAD2F-6503-4D86-B1B5-55CFD2161D41 v2
n
347