Protective Elements
A minimum current supervision (I1 min) in the positive phase sequence system prevents unwanted operaton of the
active-power supervision at lower power levels.
The release voltages determines from which voltage (line-to-line) on the
UFLS will be released.
When using the power angle supervision (method 1):
Select »
UFLS method = Power Angle Supervision.«
Set the angle »
Power Angle« .
Select a suitable minimum current »
I1 min« which prevents false tripping.
When using the pure active power supervision (method 2):
Select »UFLS method= Pure Active Power Superv.«
Set the active power threshold
»P min«.
Select a suitable minimum current »
I min« to prevent false tripping.
When the active power flow direction should not be taken into account (Method 3 – classical load shedding)
Set the parameter »
UFLS method = No Pdir / Ex Pdir«.
When the active power flow direction should not be taken into account (Method 4)
Set the parameter »
UFLS method = No Pdir / Ex Pdir«.
Assign within menu [Protection Para/Global Prot Para/Intercon-Prot/UFLS] onto parameter »
Ex Pdir« a
signal that indicates the active power flow direction.
Under frequency threshold and tripping delay
The following parameters can be used as adaptive parameters in order to establish a non-discriminating load
shedding (please refer to section non-disrcriminating load shedding by means of adaptive parameters)
Set the under frequency threshold f<
Set the tripping delay »
t-UFLS« . This timer will be started if the ULFS module is alarmed.
953
MCDLV4
DOK-HB-MCDLV4-2E
Summary of Contents for HighPROtec MCDLV4
Page 3: ...Order Code Order Code 3 MCDLV4 DOK HB MCDLV4 2E...
Page 47: ...Installation and Connection 47 MCDLV4 DOK HB MCDLV4 2E...
Page 164: ...Input Output and LED Settings 164 MCDLV4 DOK HB MCDLV4 2E...
Page 433: ...Parameters 433 MCDLV4 DOK HB MCDLV4 2E...
Page 457: ...Device Parameters 457 MCDLV4 DOK HB MCDLV4 2E...
Page 473: ...Blockings 473 MCDLV4 DOK HB MCDLV4 2E...
Page 988: ...Protective Elements 988 MCDLV4 DOK HB MCDLV4 2E P P Q P Q P Q Q Q P S S...
Page 989: ...Protective Elements 989 MCDLV4 DOK HB MCDLV4 2E Pr Q P Q P Qr...
Page 1023: ...Protective Elements 1023 MCDLV4 DOK HB MCDLV4 2E...
