VAMP 210 User Manual

VAMP 210 Generator protection relay
Technical description
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Parameters of the overcurrent stages:
I>, I>> (50/51)
Parameter: Value/unit:
Measured
value
ILmax A Corresponding primary value
I>, I>> A
Setting value in primary
current units
I>, I>> _ x Ign
Setting value as compared to
the generator rated current
Ign = Sgn/(Ugn x SQRT(3))
curve DT Definite time
NI, VI,
EI, LTI
Inverse time
t>, t>> s Operating time
Setting
values
k>
Time multiplier at inverse
time (I>)
SCntr Cumulative start counter
TCntr Cumulative trip counter
1-N, 2-N,
3-N
Fault type/single-phase fault
e.g.: 1-N = fault on phase L1
1-2, 2-3,
1-3
Fault type/two-phase fault
e.g.: 2-3 = fault between L2
and L3
Type
1-2-3 Fault type/three-phase fault
Flt xIn
Max. value of fault current as
compared to In
Load A
1 s mean value of pre-fault
phase currents IL1…IL3
Recorded
values
EDly %
Elapsed time as compared to
the set operating time, 100% =
tripping
The low-set stage (I>) of the overcurrent unit can be configured
for inverse time characteristic. Four sets of characteristic
curves according to IEC 60255-3 are available for the low-set
stage, i.e.: Normal Inverse (NI), Very Inverse (VI), Extremely
Inverse (EI) and Long Time Inverse (LTI).
Limitations:
1. The maximum measured current is 50 x I
n
. This limits the
scope of inverse curves when the setting is more than 2.5 x
I
n
. See Figure 2.1-1. E.g. at setting 4 x I
n
the maximum
setting relative current is 12.5 x I
set
/I
n
although the curves
are defined up to 20 x I
set
/I
n
2. The fastest possible operating time is about 60 ms at
inverse time characteristic according to curve types VI and
EI.

VAMP 210 Specifications

General

Brand	VAMP
Model	210
Category	Relays
Language	English