Section 1 Introduction; This Manual; Presumptions For Technical Data - ABB REB650 Applications Manual

1MRK 505 388-UEN B
Section 1
1.1
1.1.1
Busbar protection REB650 2.2 IEC
Application manual
Introduction

This manual

The application manual contains application descriptions and setting guidelines
sorted per function. The manual can be used to find out when and for what purpose
a typical protection function can be used. The manual can also provide assistance
for calculating settings.

Presumptions for Technical Data

The technical data stated in this document are only valid under the following
circumstances:
1. Main current transformers with 1 A or 2 A secondary rating are wired to the
IED 1 A rated CT inputs.
2. Main current transformer with 5 A secondary rating are wired to the IED 5 A
rated CT inputs.
3. CT and VT ratios in the IED are set in accordance with the associated main
instrument transformers. Note that for functions which measure an analogue
signal which do not have corresponding primary quantity the 1:1 ratio shall be
set for the used analogue inputs on the IED. Example of such functions are:
HZPDIF, ROTIPHIZ and STTIPHIZ.
4. Parameter IBase used by the tested function is set equal to the rated CT
primary current.
5. Parameter UBase used by the tested function is set equal to the rated primary
phase-to-phase voltage.
6. Parameter SBase used by the tested function is set equal to:
• √3 × IBase × UBase
7. The rated secondary quantities have the following values:
• Rated secondary phase current I
selected TRM.
• Rated secondary phase-to-phase voltage U
V to 120 V.
• Rated secondary power for three-phase system S
8. For operate and reset time testing, the default setting values of the function are
used if not explicitly stated otherwise.
9. During testing, signals with rated frequency have been injected if not explicitly
stated otherwise.
GUID-AB423A30-13C2-46AF-B7FE-A73BB425EB5F v19
GUID-1E949E38-E04D-4374-A086-912C25E9F93C v2
is either 1 A or 5 A depending on
r
is within the range from 100
r
= √3 × U
r
Section 1
Introduction
× I
r r
13