ABB RER620 Product Manual page 7

layed. In such applications, RER620 includes a se-
quence coordination feature. Recloser feature in
RER620 includes Switch Onto the Fault (SOTF)
which prevents reclosing sequence when recloser/
breaker is manually closed on forgotten grounding
after a maintenance work along the power line.
During the stormy weather, there might be many
autoreclose shots within a few minutes. These
types of faults can easily damage recloser/breaker
if the reclose function is not blocked based on fre-
quent operation counters.
Figure 1 shows the protection functions available
for the standard configuration.
—
Figure 1. Protection
function overview
52
1
0 79
Υ or
47NS
V >
2
3U< 27P
4
Ia, Ib, Ic
3I> 51P
3I>BF 50BF
Υ
3I>-> 67P
I0>>> 50N-3
I0> 50SEF
V > 59PS
1
3U< 27P
1
Io selectable by setting, Io calculated as default
2
Under-frequcny and df /dt based load shedding function
3
In the case of ABB GridShield recloser , these are embedded Capacitor Voltage
Divider (CVD) with 10,000:1 ratio
4
In the case of ABB GridShield recloser , these are embedded Current Transformer
(CT) with 600:1 ratio
RER620
LCM LCM
V > 59PS
1
3U> 59P
V
3I> 50P-1 3I>> 50P-2 3I>>>
I I 3I
I >
I > 46 46PD
2 2/ 1
2
P>-> 32P Q>-> 32N
I0>> 50N-2 I0> 50N-1 I0>
PHIZ1 HIZ I0>-> 67N 1
V > 47NS
2
3U> 59P f</f> 81 UFLS/R
> 59N
0
50P-3
SYNC 25
>
68
2f
51N
V > 59N
0
2
81S FUSEF 60
7