IEEE 1458 2005
$37.38
IEEE Recommended Practice for the Selection, Field Testing, and Life Expectancy of Molded Case Circuit Breakers for Industrial Applications
Published By | Publication Date | Number of Pages |
IEEE | 2005 | 55 |
New IEEE Standard – Active. A recommended procedure for the selection, application, and determination of the remaining life in molder case circuit breaker is provided.
PDF Catalog
PDF Pages | PDF Title |
---|---|
1 | IEEE Recommended Practice for the Selection, Field Testing, and Life Expectancy of Molded Case Circuit Breakers for Industria |
3 | Title Page |
5 | Introduction Notice to users Participants |
7 | CONTENTS |
9 | 1. Overview 1.1 Scope 1.2 Purpose 2. Normative references |
10 | 3. Molded case circuit breaker basics 3.1 Molded case circuit breaker basics 3.2 Circuit breakers in general |
11 | 3.3 Circuit breaker standards |
12 | 3.4 Contacts open and close 3.5 Means to open and close contacts 3.5.1 Opening and closing contacts 3.5.2 Over-toggle |
13 | 3.5.3 Two-step stored energy 3.5.4 Electromagnetic assistance 3.6 Means to extinguish an arc 3.6.1 Current zero and arc extinguishing 3.6.2 Voltage and arc extinguishing |
14 | 3.6.3 Arc extinguishing methods 3.6.4 Arc extinguisher (chute) |
15 | 3.7 Means to respond to overcurrents/commands 3.7.1 Trip units |
16 | 3.8 Method for enclosing circuit breaker components 3.8.1 Molded insulating material type |
17 | 3.9 Method for mounting circuit breaker 3.9.1 Fixed mounted |
18 | 3.9.2 Removable 3.9.3 Drawout |
19 | 3.10 Molded case circuit breaker components 3.10.1 Molded case (frame) |
20 | 3.11 Thermal conditions |
21 | 3.12 Short-circuit conditions |
22 | 3.13 Ground fault conditions 3.14 Types of trip units 3.14.1 Electromechanical trip unit |
25 | 3.14.2 Electronic trip units |
26 | 3.15 Circuit breaker selectivity |
27 | 3.15.1 Instantaneous pickup 3.15.2 Long-time pickup and delay 3.15.3 Short-time pickup and delay 3.15.4 Ground fault pickup and delay |
28 | 3.15.5 Special calibrations and applications 4. Molded case circuit breaker safety considerations 5. Selection of molded case circuit breakers |
29 | 5.1 Standard rated molded case circuit breakers |
30 | 5.2 100-Percent rated molded case circuit breakers 5.3 Voltage rating election |
31 | 5.4 Current ratings |
32 | 5.5 Current rating selection 5.6 Selection of circuit breaker current rating |
34 | 5.7 Interrupting rating 6. Estimated available fault current at transformer secondary |
36 | 7. Simplified method to calculate available fault current at transformer secondary |
37 | 7.1 METHOD 1: Simple approximation |
39 | 7.2 METHOD 2: Accounting for cable between transformer and molded case circuit breaker |
43 | 8. Procedures for field testing and determining the remaining life of molded case circuit breakers |
46 | 8.1 Rated current hold in test |
47 | 8.2 Exposed face and lug temperature check 8.3 Mechanical operation tests |
48 | 8.4 Insulation resistance test 8.5 Individual pole resistance test (millivolt drop) |
49 | 8.6 Inverse-time overcurrent trip test |
53 | 8.7 Instantaneous overcurrent trip test |
54 | 8.8 Accessory devices |
55 | Annex A (informative)—Bibliography |