Woodward HighPROtec MCDLV4, Manual

Page: 477 / 1275

Blockings
Current protective functions cannot only be blocked permanently (
»
function = inactive«) or temporarily by any
blocking signal from the »assignment list«, but also by
»reverse Interlocking«.
The following diagram applies phase current elements:
(*) All protective elements will be blocked that are using fundamental or harmonics measured values, if the
frequency leaves the nominal frequency range. Protective elements that are using RMS values will remain active.
See chapter “Wide frequency range”.
(**) This applies to devices that offer wide frequency range measurement only.
477 MCDLV4 DOK-HB-MCDLV4-2E
Pdoc_Y01
Blockings (**)
active
name .
ExBlo1
no assignment
1..n, Assignment List
&
38a
Frequency is within the nominal frequency range.(*)(**)
1
38b
12a
12b
≥1
name .
Function
inactive
active
name .
ExBlo Fc
inactive
active
name .
ExBlo2
no assignment
1..n, Assignment List
≥
1
&
name . ExBlo
name . ExBlo1-I
name . ExBlo2-I
4
name .
VRestraint
inactive
Please Refer To Diagram : Prot
Prot. active
(The General Protection module is not deactivated or blocked )
name . active
name = I[1]...[n]
active
name .
Meas Circuit Superv
inactive
name .
Ex rev Interl
no assignment
1..n, Assignment List
name .
Ex rev Interl Fc
inactive
active
&
name . Ex rev Interl
name . Ex rev Interl-I
&