EasyManuals Logo

ABB RED650 Applications Manual

ABB RED650
454 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #145 background imageLoading...
Page #145 background image
R
jX
ArgLd
(ZMRPSB)
ArgLd
(FDPSPDIS)
jX
R
IEC09000225-2-en.vsdx
IEC09000225 V2 EN-US
Figure 68: Impedance diagrams with corresponding impedances under
consideration
The outer boundary of oscillation detection characteristic in forward direction
RLdOutFw should be set with certain safety margin K
L
compared to the minimum
expected load resistance R
Lmin
. When the exact value of the minimum load
resistance is not known, the following approximations may be considered for lines
with a rated voltage of 400 kV:
• K
L
= 0.9 for lines longer than 150 km
• K
L
= 0.85 for lines between 80 and 150 km
• K
L
= 0.8 for lines shorter than 80 km
1MRK 505 393-UEN B Section 7
Impedance protection
Line differential protection RED650 2.2 IEC 139
Application manual

Table of Contents

Other manuals for ABB RED650

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ABB RED650 and is the answer not in the manual?

ABB RED650 Specifications

General IconGeneral
BrandABB
ModelRED650
CategoryProtection Device
LanguageEnglish

Related product manuals