2006 Circuit Breaker And Switchgear Testing, Maintenance and Application Forum

Course Duration: 2 Days

Who Should Attend:
This course is recommended for skilled trades, supervisors, and anyone involved in the maintenance of industrial power circuit breakers.

Course Description:

Students will learn safe and proper maintenance, testing and safety procedures for servicing a variety of Low Voltage (750V and less) circuit breakers. Topics for Low Voltage circuit breakers will include maintenance and adjustment requirements, as well as insulation resistance, contact resistance and high current primary injection tests.

Students will learn safe and proper maintenance, testing and safety procedures for servicing Medium Voltage (750V – 7.5kV) circuit breakers. Topics for Medium Voltage circuit breakers include maintenance and adjustment requirements, as well as insulation resistance, contact resistance, high potential and power factor testing.

Learning Objectives:

• Use manufacturer instruction literature and established industrial standards to perform required inspection, checks, lubrication and adjustments on Low and Medium voltage circuit breakers.
• How to perform insulation resistance tests on Low and Medium breakers and the interpretation of test data.
• How to perform contact resistance tests on Low and Medium breakers and the interpretation of test data.
• How to perform a high current primary injection test on Low Voltage circuit breakers and the interpretation of test data.
• How to perform a power factor/dissipation test on Medium Voltage breakers and the interpretation of test data.

DAY 1

8:00 a.m.
General Introduction

LV Moulded Case Circuit Breakers History
Richard DeLhorbe, David Murray, Schneider Canada

Origin of MCCB's, changes over the years (performance, protection including electronic trips)

Types - Moulded case switches, thermal-mag circuit breakers, electronic trips, internal and external accessories and ratings (80% & 100 %, FLC, SCC etc.)

• Discuss all the types, how they may work inside
• How protection detection work, more details on electronic trips
• Types of accessories available on different models
• Show available ratings, cover the 80% and 100% Code rules

How to select and specify

• Applicable standards (list, discuss as needed)
• Work through how to select and specify breakers, provide some examples
• Discuss series ratings and what they mean. What testing is done, how the manufacturers guides work
• Where to select a moulded case switch instead of a breaker

Operational, Testing and Maintenance aspects

• How to set up protection (if required), expected mechanical and electrical life endurance
• What field testing is practical and meaningful
• What limited maintenance can be done, "no user serviceable parts inside"
• Future products
• Where performance and accessories are perhaps going

9:00 a.m. - LV Power Breakers

• History (iron frame, insulated case)
• History of the frame types, moving from "iron frame" to insulated case
• History of protection units from oil dashpot to various generations of solid state, from separate to integral

Types (different electronic trips, built-in metering options, internal and external accessories) and ratings (FLC, SCC etc.)

• How modern insulated case breakers are built
• What trip units now available
• Accessories available on breakers and to interact with breakers in the cell/cradle
• Discuss the ratings available in modern breakers
• Low arc-flash models on market

How to select and specify

• Applicable standards (list, discuss as needed)
• How a system is put together
• Where low arc-flash models can be used
• Typical specification (what you need to specify)

Operational, Testing and Maintenance aspects

• How to set up protection and need for co-ordination study, expected mechanical and electrical life endurance
• What field testing is practical and meaningful
• What maintenance can and should be done, compare reduced maintenance of modern vs iron frame

Future products

• Where performance and accessories are perhaps going

10:00 a.m. - MV Disconnect/Load-Break Switches

History

• History, including open air insulated switches and new enclosed types

Types (fused or not, accessories) and ratings (FLC, SCC etc.)

• Emphsize operational limits (load-break vs disconnect) and (fault close but not fault open)
• Use of DS vs LBS
• How protection is done with fuses on LBS, use of shunt trips, use of single phase protection, etc.

How to select and specify

• Code requirements for visible break
• Ratings available
• Accessories available (motor operators, shunt trips, key interlocks etc.)

Operational, Testing and Maintenance aspects

• Checking protection and need for co-ordination study, expected mechanical and electrical life endurance
• What field testing is practical and meaningful
• What maintenance can and should be done

Future products

• Where performance and design type are perhaps going

11:00 a.m. - MV Circuit Breakers

History

• History, including minimum oil and air-magnetic types, and a comparison to modern SF6 and Vacuum types

Types

• For NA marketplace, focus more on vacuum breakers, how a breaker is assembled
• Discuss the two types of operating mechs, spring and solenoid
• Explain racking, interlocks, how the breaker interacts with the cell components
• Discuss how at MV things are not as integrated as at LV (more flexibility in relay choice etc.)

How to select and specify

• Ratings available (V, A, kA, etc). Discuss why breakers are fault rated in kA and no longer in MVA
• Accessories available (trip and close coils, auxiliary switches etc.)

Operational, Testing and Maintenance aspects

• Checking protection and need for co-ordination study, expected mechanical and electrical life endurance
• What field testing is practical and meaningful (cover x-ray danger with vacuum bottles)
• What maintenance can and should be done

Future products

• Where performance and design type are perhaps going<

Part 1: Custom Design/Special Applications Switchgear Configuration Aspects: The following aspects will be discussed:

TYPES OF SWITCHGEAR ARRANGEMENTS

• Single Ended
• Double Ended
• Breaker and one half schemes.

Indoor/Outdoor; NEMA and CSA Standards; Definitions ARC FLASH RESISTANT ENCLOSURES

• IEC/EEMAC/ANSI
• Differences between Arc Resistant and Arc Flash Protection
• Causes and Prevention of Arc Faults
• Design of Pressure Relief Systems (Arc Flaps and Ducts)

• PT connection types
• primary fusing; secondary fusing
• Secondary/Primary disconnect Considerations.

• Size Limitations
• Secondary/Primary disconnect considerations
• Requirement for Interlocking

• Typical standard breaker accessories and uses
• Breaker lifting devices
• Ground and Test Devices
• Dummy Breakers

• The Need and the advantages of the Modular Buildings Integration approach.
• Design, and implementation Topics. (Integrated Modular Buildings Design Vs. "Portable Shades" or Classical Metal Enclosures.
• Time, Money, Knowledge base, Logistics & Resources.
• Why is it so important in the Power Distribution Projects?

Full Day Tutorial - 9:00am-4:00pm

Low, Medium And High Voltage Breaker Maintenance And Testing
John Walker, General Manager, Prairie West Technical Services

Low Voltage Circuit Breakers (750V and less)

• Terminology
• Definitions
• Types
  • Draw Out
  • Fixed Mounted
• Vacuum Technology Limitations
• Testing Philosophy
• Testing Procedures
• Testing Tips and Tricks
• Switchgear Testing
• Trip unit identification (Series Trip/Static Trip)
• Trip unit Testing
• Trip unit Retro-Fitting
• Mechanical Lockout and isolation

Medium Voltage Breakers (750V – 7.5kV)

• Terminology
• Definitions
• Types
  • Minimum Oil
  • Air
  • Vacuum
  • Gas
• Testing Philosophy
• Testing Procedures
• Testing Tips and Tricks
• Switchgear Testing
• Protective Relay Interaction
• Relay Testing as it Pertains to the Associated Breaker
• Retro-Fitting
• Mechanical & Electrical Lockout and Isolation

• Terminology
• Definitions
• Types
  • Minimum Oil
  • Bulk Oil
  • Air
  • Vacuum
  • Gas (Live Tank / Dead Tank Designs)
  • Circuit Switchers
• Testing Philosophy
• Testing Procedures
• Testing Tips and Tricks
  • Protective Relay Interaction
  • Relay Testing as it Pertains to the associated Breaker
  • Mechanical & Electrical Lockout and Isolation

Infrared Thermography has been used for detection of electrical problems in electrical circuit breakers and switchgear for many years. A conscientious thermal survey of electrical equipment involving IR "sightglass windows" in cabinets and enclosures help to recognize the thermal indications of faults.

GENERAL INFORMATION

When and Where
The Electrical Safety forum will be held as follows:

Vancouver, BC - November 6-7,2006
Best Western Hotel & Conference Centre
7551 Westminster Highway, Richmond, BC
Tel: 604-273-7878

Edmonton, AB - November 8-9,2006
Coast Terrace Inn
4440 Gateway Blvd.
Tel: 780-437-6010

Winnipeg, MB - November 13-14,2006
Airport Hilton Hotel

Ottawa, ON - November 15-16,2006
Chimo Hotel
1199 Joseph Cyr Street
Tel: 613-744-1060

Toronto, ON - November 20-21,2006
Park Plaza Airport Hotel
33 Carlson Court
Tel: 416-675-1234

Halifax, NS - November 22-23,2006
Citadel Halifax Hotel
1960 Brunswick Street; Halifax, NS
Tel: (902) 422-1391

A special bedroom rate (non-commissionable) has been arranged with these hotels. To receive this rate, inform the hotel that you are a delegate with the Canadian Electricity Forum when making your reservation.

About the Canadian Electricity Forum
With headquarters in Ajax, Ontario, The Canadian Electricity Forum is dedicated to providing cost-effective, highly specialized education and learning through industry-wide forums, electrical training courses, Electricity Today magazine, and a comprehensive website at www.electricityforum.com. Since 1986, more than 15,000 delegates from leading companies across Canada have attended our forums and courses, including: