Woodward highprotec MRI4, User Manual

Page: 362 / 727

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«.
All other protection functions can be activated, deactivated or blocked in the same manner.
(*) 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.
(**) This applies to devices that offer wide frequency range measurement only.
362 MRI4 DOK-HB-MRI4-2E
Blockings (**)
Pdoc_Y05
I/IG .
ExBlo1
no assignment
1..n, Assignment List
&
Frequency is within the nominal frequency range.(*)(**)
1
I/IG .
Function
inactive
active
I/IG .
ExBlo Fc
inactive
active
I/IG .
ExBlo2
no assignment
1..n, Assignment List
≥1
&
I/IG . ExBlo
I/IG . ExBlo1-I
I/IG . ExBlo2-I
4
Please Refer To Diagram: Prot
Prot. active
(The General Protection module is not deactivated or blocked)
I/IG . active
I/IG = I[1]...[n], IG[1]...[n]
I/IG .
Ex rev Interl
no assignment
1..n, Assignment List
I/IG .
Ex rev Interl Fc
inactive
active
&
I/IG . Ex rev Interl
I/IG . Ex rev Interl-I