ABB RELION REB500 Technical Manual page 162

Section 5
Bay protection functions
A
B
IEC19000464 V1 EN-US
Figure 60: Resulting composite dead time (Source: Guidelines for autoreclosure in
Where,
A: circuit-breaker 1
C: closed position
0: start
2: contacts part
4: close signal
6: contacts make
t : tripping time
1
t : arc extinction time
3
t : pre-ignition time
5
t : dead time
p
t : fault duration
w
156
A
t
W
t
P
1
0
C
2
3
O
t
1
t
t
3
4
1
0
C
2
3
O
electrical power systems published by the German Association of Power
Utilities VDEW)
© Copyright 2019 ABB. All rights reserved
t
S
6
5
4
t
2
t
5
t
6
t
7
6
5
4
180000059-IEC19000464-1-en.vsdx
B: circuit-breaker 2
O: open position
1: trip signal
3: current interrupted
5: current flows again
t : reclosing time
2
t : dead time
4
t : duration of interrupt
6
t : resulting dead time
7
t : inhibit time
s
1MRK 505 406-UEN B
B
(t)
Bay protection functions REB500
Technical manual