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The seminar covers specific arrangements with selection/coordination; circuit breaker design and application differences including moulded case and the large live tank types. It also describes the medium voltage arc-proof metal-clad switchgear.

Course Outline
After participating in this course, you will be able to:
  • understand switchgear devices needed for low-voltage, medium-voltage, and high-voltage power
  • understand the differences between applications of metal-enclosed and metal-clad switchgear
  • enhance your knowledge of switchgear components
  • benefit from real-life applications giving details of problems and solutions
  • acquire knowledge to help you reduce your operating and maintenance costs
  • take advantage of an objective discussion on the equipment life extension options: replace, rebuild or retrofit and their application to your own switchgear equipment
Description A thorough knowledge of state-of-the-art power switchgear equipment is a prerequisite to decisions on whether to replace, rebuild or retrofit your switchgear equipment.  These decisions become more difficult due to increasingly complex distribution systems, whether provided by a utility, large industry or a commercial or institutional building ranging from LV (up to 600 V), MV (up to 34.5 kV) through HV (above 34.5 kV). This seminar will describe all products such as fuses, switches, circuit breakers, automatic circuit reclosers and sectionalizers, protective relays, and metal-enclosed switchgear with drawout circuit breakers, stationary/drawout load break interrupter switches, and unit substations.  There is specific emphasis on the most-used equipment including the metal-enclosed/metal-clad switchgear and the various interrupting devices used in the drawout designs and unit substations. 

The seminar covers specific arrangements with selection/coordination; circuit breaker design and application differences including moulded case and the large live tank types.  It also describes the medium voltage arc-proof metal-clad switchgear. Application considerations with respect to standards, practical recommendations for extension of service life for older, existing installations as well as protective relaying, control and metering are special features of this seminar.

Objective To provide an update on the recent advances in switchgear technology.

Who Should Attend Engineers, technologists and technicians, and other technical personnel from power utilities industry, municipal utilities, consulting engineering firms and manufacturers of electrical equipment who are involved with the design, operation and maintenance of power switchgear equipment and associated protection schemes.

Program Outline Faculty: Ajit Bapat, P.Eng., M.Eng., MBA

Day I 8:00        Registration and Coffee
8:20        Welcome and Introduction
8:30        Introduction and Overview
Power switchgear
- Types
- Standards
- Tests
- Insulation systems
- Disconnecting devices
- Operating systems
9:30        Stretch Break

9:40        Electrical Switching Stresses
Current interruption in power systems
Recovery transients (RV, TRV, RRRV)
Fault duties
Closing transients
Load, capacitor and inductor switching
Lightning considerations
10:40     Refreshments and Networking

11:00     Typical Substation Design
Equipment types
Basic concepts of substations engineering: space planning, cost planning                      
12:30     Lunch

1:30       Low Voltage Switchgear and Breakers
ANSI specifications for low voltage switchgear and breakers: temperature rise, ratings, design tests, production tests and usual and unusual service conditions
Construction features of low voltage switchgear
UL and CSA standards
Comparison with IEC standard of switchgear and low voltage circuit breakers
Comparison of insulated case breakers and air circuit breakers
Retrofit of old switchgear with new trip devices
2:30       Refreshments and Networking

2:50       Metal-Enclosed and Metal Clad Switchgear
Classification of switchgear assemblies
Detailed review of ANSI standards
Load break switches, ratings, dimensions, construction feature, current limiting and expulsion fuses
Metal enclosed circuit breaker switchgear
Dimensions and construction features
3:30       Medium-Voltage Switchgear and Circuit Breakers
Types of circuit breakers
Design criteria
Definition of ratings of circuit breakers
Medium voltage circuit breaker interrupting media
Standards and methods of testing
4:30       Adjournment

Day II 8:30       High Voltage Circuit Breakers
Types-SF6, bulk oil, air blast, vacuum
Indoor or outdoor, fixed or draw-out types
Ratings, fault-interrupting capability, continuous current
Gas insulated switchgear
9:40       Refreshments and Networking

10:00     Commissioning Tests for Switchgear
Safety considerations
Trip and close timing tests
Contact resistance tests
Control circuits and interlocks
Insulation system
Monitoring systems and alarms- SF6, Gas, Air
Disconnect or isolating switches
11:00     Maintenance Tests for Switchgear
Safety considerations
Temperature surveys
Insulation systems
Control circuits and interlocks
Alarms and monitoring
Timing tests
Contact resistance tests
Buswork and cable connections
12:00     Lunch

1:00       Protective Relaying Systems
Power system faults
Magnitude of fault current
Requirements of protection systems
Components of power system protection schemes
Current transformers and voltage transformers
Feeder overcurrent protection
Bus differential protection
2:30       Refreshments and Networking

2:50       Coordination of Electrical Protection Systems
Fuse to Fuse
Circuit breaker to fuse
Fuse to circuit breaker
Backup protection
Radial distribution systems
Interconnected systems with two-way flow of fault current
Selective zones of protection
Breaker failure protection
Auto-reclosing of circuit breakers
4:30       Adjournment

8:30        Case Study I - Low Voltage
A discussion will follow the presentation of the case study.  Participants are encouraged to take part in the discussion.
10:20     Refreshments and Networking

10:40     Case Study II - Medium Voltage
A discussion will follow the presentation of the case study.  Participants are encouraged to take part in the discussion.
11:40     Lunch

12:40     Life Extension of Switchgear Control Equipment
Electrical equipment life
Mode of failure
Diagnostic and deterministic procedures
Equipment life extension options: replace, rebuild, retrofit
Comparisons between interrupting technologies - oil, air, SF6 and vacuum
Typical installation considerations
Application considerations
2:40       Refreshments and Networking

3:00       Case Study III - High Voltage
A discussion will follow the presentation of the case study.  Participants are encouraged to take part in the discussion.
4:00       Concluding Remarks and Final Adjournment

Special Features In three days you gain knowledge to ask the right questions so that you can select suitable switchgear, operate, and maintain it economically, and confidently make decisions whether to refurbish or replace equipment.  If you already have experience with switchgear and protection components, you become familiar with the state-of-the-art technology, and get answers to all your questions to increase efficiency and economy of your switchgear equipment.
Prerequisites & Certificates

Certificates offered

1.8 CEUs / 18 PDHs

Cancellation Policy
To withdraw from a course, you must send a request, in writing, with the official receipt to our office. Fifteen or more business days in advance: full refund less $50.00 administration charge. Five to fifteen business days in advance: non-refundable credit of equal value for any future EPIC seminar within one year. Credits are transferable within your organization. In case of an unexpected event occurring after this time, you may send someone else to take your place without any additional cost.
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Here are some reviews of the training vendor.
The course was very well presented and the course instructor was absolutely amazing.
Reviewed by 2013
Our instructor, Stephen Lamming, was outstanding and a true expert in his field. He was able to complement the technical air monitoring information with practical real life examples which was highly beneficial. He is an excellent communicator and was highly interactive with the course attendees. This course was recommended to me because Stephen Lamming does an outstanding job. I was very impressed with this course and have subsequently recommended it to my colleagues.
Reviewed by 2012
Would have liked more interactive problem solving.
Reviewed by 2011

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