Course Overview

Nowadays electrical power systems became the most important item in our daily life. The power interruption and problems may cause many problems grading from minor ones to sever ones and loss of life. Therefore, marinating electrical power supply is very important issue in power system operation and maintenance. Transformers, which is the most important component of power system after power generation must have a comprehensive plan for failure analysis and troubleshooting in order to plan the adequate maintenance and to provide the most protection system.

This comprehensive 5-day program has been designed to electric sector, oil and gas, and industrial sectors where the power transformer to be troubleshot and analyzed. The course starts by introducing the transformer as a machine and flow through the transformer oil detailed analysis, electrical and mechanical analysis, with assessment planning and forms and ends by maintenance procedures for the transformer and its auxiliaries.

This program is designed to focus to transfer knowledge and stimulating experience. It is highly interactive with many discussion and case studies around the failure analysis and troubleshooting.

Course Objectives

By the end of the course, the participants will be able to: 

• Identify all methods for oil analysis and diagnosis

• Learn and professionalize their knowledge about electrical and mechanical testing.

• Learn how to do maintenance for the transformer and its auxiliaries

• Learn how to plan a maintenance program against the reliability index required.

Who Should Attend

This program is designed for operation, maintenance and condition monitoring engineers. High caliber supervisors are also recommended to attend this program.


Course Content

Module (01) Circuit Breaker Technologies

1.1 Electric arc fundamentals

1.2 Circuit Breaker Technology

1.2.1 Bulk Oil Circuit Breakers (BOCBs)

1.2.2 Minimum Oil Circuit Breakers (MOCBs)

1.3 Air Circuit Breakers (ACBs)

1.4 Air Blast Circuit Breakers (ABCBs)

1.5 SF6 Gas Circuit Breakers

1.6 Vacuum Circuit Breakers (VCBs)

1.7 Gas Insulated Switchgear (GIS)

1.8 Circuit Breaker Operating Mechanisms

1.9 Soft Starter Motor

Module (02) Low Voltage Switchgear 

2.1 Conventional Incomer

2.2 Conventional Sub-Incomer

2.3 Conventional Feeder Protection

2.4 Motor Control

2.5 Other Industrial Load Control

2.6 Lighting/Domestic Load Control

Module (03) Medium Voltage Switchgear 

3.1 Historical Background

3.2 Constructional Forms

3.2.1 Metal-enclosed Switchgears

3.2.2 Live Tank Switchgears (Outdoor Porcelain-clad Construction)

3.2.3 Vacuum Switchgear

3.2.4 Dead Tanke

3.3 Design Parameters

3.3.1 Normal Current Rating (Thermal Aspects of Design)

3.3.2 Short-circuit Current

3.3.3 Insulation Aspects of Design

Module (04) Sf6 Circuit Breakers 

4.1 SF6 – Gas Properties.

4.2 SF6 – Metal enclosed Switchgear.

4.3 SF6 – Apparatus and Components.

4.4 SF6 – Circuit Breakers.

4.5 Insulation Coordination and over Voltage Protection.

4.6 Handling, Maintenance, Inspection and Testing.

4.7 General Design Considerations.

4.8 SF6 Testing

4.9 Troubleshooting

Module (05) Gas Insulated Sub-Station/Switchgear (GIS) 

5.1 Design

5.2 Bay Information

5.3 Design Consideration

5.4 Components/Modules

5.5 Disconnectors (Isolators)

5.6 Circuit Breaker

5.7 Current Transformer

5.8 Earth Switch

5.9 Accessories

5.10 Control Panel

5.11 Constructional Aspects of GIS

5.12 Installation and Maintenance of GIS

5.13 Lifecycle Cost of GIS

Module (06) Auto-Recloser and Sectionaliser 

6.1 Technical Specifications for an Auto-recloser

6.2 Control Transformer

6.3 Control Unit for Auto-recloser for 11 kV System

6.4 Working of Auto-recloser

6.5 Need for Auto-recloser

6.5.1 High Lightning Discharges

6.5.2 Large Concentration of Customers

6.5.3 Remote Site/Difficult Access

6.5.4 Bush Fire-prone Areas

6.6 Automatic Sectionaliser

Module (07) Control and Interlocking Schemes for Medium Voltage Switchgear 

7.1 Safety Schemes Using Position Limit Switches

7.2 Voltage Selection Schemes

7.3 Tripping Schemes

7.4 Trip Circuit Supervision Schemes

7.5 Alarm Schemes

7.6 Synchronising Schemes

7.7 Automatic Supply Transfer Schemes

Module (08) Erection and Commissioning of Switchgears 

8.1 Inspection on Receipt at Site

8.2 Storage and Handling

8.3 Installation

8.4 Erection

8.5 Assembly

8.6 Small Wiring and Connection of LT Cables

8.7 Filling with Insulation Medium

8.8 Earthing

8.9 Final Inspection

8.10 Testing and Commissioning

8.11 Final Commissioning/Load Testing

Module (09) Operation and Maintenance of Switchgear 

9.1 Operation of Switchgear

9.2 Switchgear Maintenance

9.3 Maintenance Requirements

9.4 Inspection Schedule

9.5 Preparation Before Maintenance

9.6 Maintenance Procedure

9.7 Switchgear Spares

9.8 Lubrication of Operating Mechanism

9.9 Troubleshooting Guide

9.10 Service Feedback

Module (10) Testing of Switchgear 

10.1 Routine Tests

10.1.1 Dielectric Test on the Main Circuit

10.1.2 Dielectric Test on Auxiliary and Control Circuits

10.1.3 Measurement of the Resistance of the Main Circuit

10.1.4 Tightness Test 13.1.5 Design and Visual Checks

10.1.6 Mechanical Operation Tests

10.2 Type Tests

10.2.1 Dielectric Tests

10.2.2 Radio Interference Test

10.2.3 Measurement of the Resistance of Main Circuit

10.2.4 Temperature Rise Test

10.2.5 Short Time Current Withstand Test

10.2.6 Verification of the Degree of Protection Test

10.2.7 Electromagnetic Compatibility (EMC) Test

10.2.8 Mechanical Operation Tests at Ambient Temperature

10.2.9 Short-circuit Duties Test

10.2.10 Capacitive Current Switching Tests

10.2.11 Environmental Test

10.2.12 Critical Current Test

10.2.13 Short Line Fault Test

10.2.14 Out-of-Phase Making and Breaking Tests

10.3 Special Tests