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Siemens SENTRON Configuration Manual
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Introduction
Selectivity for 3VA mol
ded case circuit breakers
8
Configuration Manual, 08/2016, A5E03603181010-01
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The following guides to accessi
ng information are provided:
●
Table of contents
●
Section "Structure of the manual"
●
Index
7
9
Table of Contents
Default Chapter
5
Table of Contents
5
1 Introduction
7
2 Selectivity - Terms and Definitions
9
3 Methods of Implementing Selectivity Using Circuit Breakers
13
Starting Point
15
Selectivity in the Overload Zone
15
Example
16
Circuit Breaker Parameters
17
Tripping Characteristics of Circuit Breakers
18
Current Selectivity
19
Circuit Breaker Parameters
20
Tripping Characteristics of Circuit Breakers
21
Different Short-Circuit Currents at Different Fault Locations
22
Time Selectivity
23
Circuit Breaker Parameters
26
Tripping Characteristics of Circuit Breakers
27
Implementation of Total Selectivity
28
Zone Selective Interlocking
30
Zone Selective Interlocking and Time Selectivity
33
Setting of Circuit Breakers
36
Dynamic Selectivity
40
Implementation of Dynamic Selectivity
41
Let-Through Energy Diagram
43
Example
44
4 Selectivity Implemented by Combinations of Protective Devices
47
Molded Case Circuit Breakers and Downstream Fuse
47
Fuse and Downstream Molded Case Circuit Breaker
50
Fuse and Downstream Miniature Circuit Breaker
53
Fuse and Downstream Fuse
53
5 Selectivity with Parallel Incoming Feeders
57
Selectivity with Two Identical Incoming Feeders
58
Symmetrical Distribution (Ideal Scenario)
59
Asymmetrical Distribution
59
Selectivity with Three Identical Incoming Feeders
60
Fault Within the Protection Zone of the Downstream Protective Device
60
Fault between Transformer Terminals and Incoming Feeder Circuit Breaker
61
Selectivity with Bus-Couplers
63
Sources of Information and Other Documentation
68
6 Selectivity and Undervoltage Protection
69
3 VA Selectivity Tables
71
List of Abbreviations
73
A.1 List of Abbreviations
73
Glossary
75
Other manuals for Siemens SENTRON
Manual
224 pages
Installation Manual
20 pages
Instructions
76 pages
Configuration Guide
14 pages
5
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Siemens SENTRON Specifications
General
Brand
Siemens
Model
SENTRON
Category
Power distribution unit
Language
English
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