ABB RELION REX640

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4.3.6.5 Operation principle

The function can be enabled and disabled with the

Operation

setting. The

corresponding parameter values are "On" and "Off".

The operation of HIxPDIF can be described with a module diagram. All the modules

in the diagram are explained in the next sections.

START

BLOCK

Level

detector

Blocking

logic

OPERATE

Timer

I3P

I_A

START

BLOCK

Level

detector

Blocking

logic

OPERATE

Timer

I3P

I_B

START

BLOCK

Level

detector

Blocking

logic

OPERATE

Timer

I3P

I_C

Figure 439: Functional module diagram

The module diagram illustrates all the phases of the function. Functionality for

phases A, B and C is identical.

All three phases have independent settings.

Protection functions 1MRS759142 F

774 REX640

Technical Manual

Main Page

Contents7
1 Introduction30
2 REX640 overview42
3 Basic functions57
4 Protection functions326
5 Protection related functions1157
6 Supervision functions1302
7 Condition monitoring functions1359
8 Measurement functions1433
9 Control functions1505
10 Power quality measurement functions1807
11 General function block features1858
12 Requirements for measurement transformers1915
- 12.1 Current transformers1915
  - 12.1.1 Current transformer requirements for overcurrent protection1915
  - 12.1.2 Current transformer requirements for transformer differential protection1918
13 Protection relay's physical connections1922
14 Technical data1940
15 Protection relay and functionality tests1949
16 Applicable standards and regulations1953
17 Glossary1954
Blank Page1959

ABB RELION REX640 - Page 774

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