VAMP 257 - Page 42

VAMP 257 Feeder and motor manager
Operation and configuration
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42
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2 Settings for protection stages
Protection stage Parameter Setting
Overcurrent stage I> I> 1.20 x In
Type DT
t> 0.30 s
k> (NI, VI, EI,
LTI)
1.00
k> is valid only for inverse time.
Overcurrent stage I>> I>> 2.50 x In
t> 0.20 s
Unbalance stage I2> I2> 20 %
t> 10.0 s
Earth fault stage Io> Io> 20 %
Type DT
t> 1.00 s
k> (NI, VI, EI,
LTI)
1.00
k> is valid only for inverse time.
Directional Earth fault
Ioϕ>
0.20 pu
stage Ioϕ>
t> 1.00 s
Uo> 10 %
Offset
0°
ChCtrl DI13
See section 2.3.4 from technical description.
Earth fault stage Uo > Uo > 10 %
t> 2.0 s
Thermal stage T> T> 1.06 x In
Alarm 90 %
Tau 60 min
Auto reclose ReclT 10.0 s
PulseL 0.20 s
ReadyT 10.0 s
2. Harmonics stage 2. Harm 10 %
3 Blocking matrix
The required blockings are made by using the VAMPSET
software.
4 Configuration of output relays
The required groupings of the output relays and output signals
are configured in the DO menu, see chapter 5.4 on page 32.