VAMP 150 - Page 47

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:
I
II
I
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