Isolators - ABB RELION REB500 Operation Manual

Section 4
System settings
•
•
•
ts : Additional safety time (10 ms)
•
Table 24: Range of the reclaim time setting for circuit-breakers
Parameter
Reclaim time
Table 25:
I
kmin-set
=500 A
>500 A
Setting example for the reclaim time:
IECEQUATION18072 V1 EN-US
4.2

Isolators

The Overview tab opens a dialog box with a list of all the isolators in the single-line diagram
with their labels and bay labels. The isolators of a particular bay can be viewed by selecting the
check box Feeder filter and then selecting a bay from the list.
The label in the Markings field of the Details dialog box can be edited.
30
The adjusted pick up value of the busbar protection differential current
measurement I
kmin-set
The maximal primary busbar fault current I
This value can be looked up in
Min.
20
Reset time treset of the breaker reclaim function (50/60Hz)
Maximal busbar fault current I
≤10 kA
77 ms
63 ms
The operation of feeder and bus-tie breakers and the reclaim time are
described in detail in the
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kmax
Table 25 for 50 Hz and 60 Hz.
Max. Default
500 160
kmax
>10 kA to ≤20 kA
87 ms
73 ms
Application manual .
Distributed busbar protection REB500
1MRK 505 400-UEN B
Step Unit
20 ms
>20 kA to ≤50 kA
100 ms
88 ms
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