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VAMP Ltd
Motor protection relay
Technical Description
VAMP 150
VM150.EN005
Vamp 24h support phone : +358 (0)20 753 3264
19
Figure 2.2.7-1. Block diagram of the earth-fault stage I
0
>.
Figure 2.2.7-2. Block diagram of the earth-fault stage I
0
>>.
Parameters of the earth-fault stage:
IIII
0
00
0
> (50/51N
> (50/51N
> (50/51N
> (50/51N))))
Parameter:
Parameter:
Parameter:
Parameter:
Value/unit:
Value/unit:
Value/unit:
Value/unit:
Measured
value
I
0
A
Earth-fault current in primary
value
I
0
>
A
Setting value in primary value
I
0
>
pu
Setting value as per unit value
Setting
values
t>
s
Operation time [s]
SCntr
Start counter (Start) reading
TCntr
Trip counter (Trip) reading
Flt
pu
Max. value of fault current in
primary value
Recorded
values
EDly
%
Elapsed time as compared to
the set operate time, 100% =
tripping