EasyManuals Logo

ABB rec670 Applications Manual

ABB rec670
658 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 #142 background imageLoading...
Page #142 background image
Pos Description
1 Scheme grounding point
It is important to insure that only one grounding point exist in this scheme.
2 Three-phase plate with setting resistors and metrosils. Protective ground is a separate 4 mm screw
terminal on the plate.
3 Necessary connection for three-phase metrosil set.
4 Position of optional test switch for secondary injection into the high impedance differential IED.
5 Necessary connection for setting resistors.
6 Factory-made star point on a three-phase setting resistor set.
The star point connector must be removed for installations with 670 series
IEDs. This star point is required for RADHA schemes only.
7 Connections of three individual phase currents for high impedance scheme to three CT inputs in
the IED.
7.1.3.2 Connections for 1Ph High impedance differential protection HZPDIF (87)
GUID-D68A237F-610C-4AF0-870F-273117F64D92 v10
Restricted earth fault protection is a typical application for 1Ph High impedance
differential protection HZPDIF
(87). Typical CT connections for the high impedance
based protection scheme are shown in figure
51.
Section 7 1MRK 511 401-UUS A
Differential protection
136 Bay control REC670 2.2 ANSI
Application manual

Table of Contents

Other manuals for ABB rec670

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ABB rec670 and is the answer not in the manual?

ABB rec670 Specifications

General IconGeneral
BrandABB
Modelrec670
CategoryControl Unit
LanguageEnglish

Related product manuals