Presented by Craig Abbott, topics covered in this webinar include:

- Brief recap of Part 1 (Watch part one here: [ Ссылка ])
- The basics to intermediate aspects of circuit breaker selectivity.
- Look at Regulations according to AS/NZS3000:2018.
- Discuss Circuit Breakers and their operation & how to modify time current curves.
- Explain Current limiting.
- Discuss Current & Energy selectivity.
- Investigate Fuse backup protection.
- Discuss non-auto switchgear backup protection.

0:00 Introduction
1:54 Why achieve Selectivity?
4:38 Discrimination - General Terms?
6:02 Reliability of Supply (Discrimination) clause 2.5.7 AS NZS 3000:2018
8:11 Selectivity - definitions & types
8:58 Thermal Magnetic MCCBs Protection Characteristics
10:40 Electronic Curve Selection
11:34 1 Partial Discrimination
12:27 2 Full Discrimination
13:12 What is Enhanced Discrimination?
14:02 Right Hand Grip Rule
15:20 Current Limiting Circuit Breaker
16:51 There are 3 methods used to determine Selectivity
21:28 Introduction to Cascading - Fuse back up protection
23:34 In Summary
24:59 Selectivity # 2/4 Under no circumstances shall NHP be responsible or liable in any way for any content, including but not limited to errors or omissions in the content, or for any loss or damage of any kind as a result of any content communicated in this video by NHP.

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