Course Details: Electrical Design Principles – Part 1
Upon completion of Electrical Design Principles – Part 1 course, you will receive 3 CPD Credits under validation number SAIEE-2217-V.
After 32 years in consulting engineering business, involved in several large protects in the mining, industrial and commercial industries, Dio du Toit decided to share the knowledge gained, and share the typical mistakes engineers make. Electrical engineering is easy IF you understand the principles.
Course Outline:
Design Principles
We have to understand the behaviour of each type of load when we do load calculations.
Understanding how to apply to different diversity in the different scenarios and the associated load graphs.
The effect of power factor correction in a system and to establish what power factor correction equipment is required. Teach a simple powerful method of fault calculation, where you can sit in a design meeting and provide answers in a jiffy. This will also assist in the size of a transformer for suitable motor
starting.
Power Transformers
The theory of a transformer will be dealt with, where the principles of core losses and the different sizes of transformers and impedances will be addressed. Why there are different transformer impedances for different transformers and the application thereof? Standard vector grouping is used in the industries and discusses the typical types of cooling methods. Calculate the transformer voltage drop under different load scenarios. Explain the typical protection schemes for transformers and address the economic aspects. Give guidelines on the minimum specification for a transformer.
Switchgear
The different types of circuit breakers and insulation media i.e. SF6, vacuum, oil, and air will be discussed.
All the aspects of internal arc classification and IP ratings will be dealt with. Give guidelines on the minimum specification for switchgear.
Protection
Since protection is a specialist field and should be designed by a professional engineer. The aim of this course is to empower the design engineer with adequate knowledge to accommodate the protection systems with the assistance of the protection engineer.
Earthing
Earthing can kill and damage property and equipment with substantial implications. The purpose of
this course is to understand earthing and the earthing requirements in terms of SANS and some supply
authorities. Earthing principles for typical transformer, miniature substation and large transformer
substation will be dealt with.
Program:
Design Principles
- Load Calculation
- Motors
- Lights
- Plugs
- Other Loads
- Typical Load Graphs
- Diversity
- Power Factor Correction
- Fault Current Calculation
Power Transformers
- Theory of a transformer
- Core Losses and Exciting Currents
- Core Losses
- Impedances
- Vector Group
- Transformer Volt Drop Calculation
- Transformer Protection
- Transformer Type of Cooling
- Typical Specification
Switchgear
- Circuit Breakers
- Type of Circuit Breakers
- Insulation Media
- Internal Arc Detection
- Classifications
- IP Ratings
- Typical Specification
Protection
- Main Function & Duties of Protection
- Basic Components
- Type of Faults
- Typical earthing of Transformers for protection purposes
- Advantages
- Disadvantages
- Effective – Non-Effective Earthing
- Effect of current flow through the human body
- Protection Zones
- Typical Protection Schemes
- Fuses
Earthing
- Why Earthing?
- Earthing / Bonding
- Earthing – SANS 10142
- Earth Testing
- Typical Substation Earthing System
Outcome Based Evaluation, Course Evaluation & Certificate
