Woodward HighPROtec MCDLV4, Manual

Page: 638 / 1275

Protective Elements
Parameter Description Setting range Default Menu path
H4 Sta Threshold (4th harmonic - basic wave ratio)
for restraining the differential protection
function against stationary 4th harmonic.
Only available if: Stab H4 = active
10 - 60% 20% [Protection
Para
/<1..4>
/Diff-Prot
/Id]
Stab H5 Stabilisation of differential protection
function against stationary or transient
components of the 5th harmonic at the
phase current (e.g. transformer
overexcitation).
inactive,
active
inactive [Protection
Para
/<1..4>
/Diff-Prot
/Id]
H5 Sta Threshold (5thd harmonic - basic wave
ratio) for stabilising the differential
protection function against stationary 5th
harmonic.
Only available if: Stab H5 = active
10 - 60% 30% [Protection
Para
/<1..4>
/Diff-Prot
/Id]
H5 Tra Threshold (5th harmonic - basic wave ratio)
for temporary restraining of the differential
protection function against transient 5th
harmonic.
Only available if: Stab H5 = active
10 - 60% 15% [Protection
Para
/<1..4>
/Diff-Prot
/Id]
t-Trans Time of temporary stabilisation of the
differential protection function when
thresholds for „H2 Tra“ and „H5 Tra“
(transient harmonic) are exceeded.
0.05 - 120.00s 2s [Protection
Para
/<1..4>
/Diff-Prot
/Id]
Crossbl Active = Phase overlapping stabilisation of
the differential protection function. Inactive
= Phase selective stabilisation of the
differential protection function.
inactive,
active
inactive [Protection
Para
/<1..4>
/Diff-Prot
/Id]
CT Satur Monit Current Transformer Saturation Supervision inactive,
active
active [Protection
Para
/<1..4>
/Diff-Prot
/Id]
CT Satur
Sensitvn
Sensitiveness of the Current Transformer
Satusation Supervision. The higher the
value, the lower the sensitiveness.
Only available if: VRestraint = active
100 - 500% 100% [Protection
Para
/<1..4>
/Diff-Prot
/Id]
638 MCDLV4 DOK-HB-MCDLV4-2E