Woodward HighPROtec MCDLV4, Manual

Page: 748 / 1275

Protective Elements
Parameter Description Setting range Default Menu path
%(I2/I1) The %(I2/I1) setting is the unbalance trip
pickup setting. It is defined by the ratio of
negative sequence current to positive
sequence current (% Unbalance=I2/I1).
Phase sequence will be taken into account
automatically.
Only available if: %(I2/I1) = use
2 - 40% 20% [Protection
Para
/<1..4>
/I-Prot
/I2>[1]]
Char Characteristic DEFT,
INV
DEFT [Protection
Para
/<1..4>
/I-Prot
/I2>[1]]
t Tripping delay
Only available if: Characteristic = DEFT
0.00 - 300.00s 0.00s [Protection
Para
/<1..4>
/I-Prot
/I2>[1]]
K This setting is the negative sequence
capability constant. This value is normally
provided by the generator manufacturer.
Only available if: Characteristic = INV
1.00 - 200.00s 10.0s [Protection
Para
/<1..4>
/I-Prot
/I2>[1]]
τ-cool If the unbalanced load current falls below
the pickup value, the cooling-off time is
taken into account. If the unbalanced load
exceeds the pickup value again, than the
saved heat within the electrical equipment
will lead to an accelerated trip.
Only available if: Characteristic = INV
0.0 - 60000.0s 0.0s [Protection
Para
/<1..4>
/I-Prot
/I2>[1]]
Current Unbalance Module Input States
Name Description Assignment via
ExBlo1-I Module input state: External blocking1 [Protection Para
/Global Prot Para
/I-Prot
/I2>[1]]
ExBlo2-I Module input state: External blocking2 [Protection Para
/Global Prot Para
/I-Prot
/I2>[1]]
748 MCDLV4 DOK-HB-MCDLV4-2E