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:
IIII
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
