VAMP 150 - Incorrect Phase Sequence Protection I2

VAMP Ltd
Motor protection relay
Technical Description
VAMP 150
VM150.EN005 Vamp 24h support phone : +358 (0)20 753 3264
17
Parameters of the current unbalance stage:
I
II
I
2
22
2
> (46)
> (46)> (46)
> (46)
Parameter:
Parameter:Parameter:
Parameter: Value/unit:
Value/unit:Value/unit:
Value/unit:
Measured
value
I2/I
MOT
% Negative phase sequence
current as per times I
MOT
I2> % Start current as per times I
MOT
DT Operation charact./ definite
time
Type
INV Operation charact./ inverse
time
t> s Operation time [s] at definite
time function
Setting
values
K1> Time multiplier at inverse
time
SCntr Start counter (Start) reading
TCntr Trip counter (Trip) reading
Flt % Max. value of fault current as
per times I
MOT
Recorded
values
EDly % Elapsed time as compared to
the set operate time, 100% =
tripping
2.2.5. Incorrect phase sequence protection I2>>
The phase sequence stage prevents the motor from running in
the wrong direction, thus protecting the load.
When the ratio between negative and positive sequence current
exceeds 80%, the phase sequence stage starts and trips after
100 ms.
Parameters of the incorrect phase sequence stage:
I2>>
I2>>I2>>
I2>> (46)
(46) (46)
(46)
Parameter:
Parameter:Parameter:
Parameter: Value/unit:
Value/unit:Value/unit:
Value/unit:
Measured
value
I2/I1 % Neg. phase seq. current/pos.
phase seq. current
SCntr Start counter (Start) reading
TCntr Trip counter (Trip) reading
Flt % Max. value of fault current
Recorded
values
EDly % Elapsed time as compared to
the set operate time, 100% =
tripping