The Electricity Forum Training Institute

Time Table
Start: 9:00AM
Coffee Break 10:30AM
Luncheon 12PM
Restart 1:00PM
Refreshment Break 2:30PM
Adjournment 4:00PM (approx.)

ELECTRICAL PROTECTION AND CONTROL TECHNOLOGY

How safe is your workplace? Every year, thousands of electrical accidents occur in businesses worldwide. This Forum will help you and your company save money, and more importantly, save lives.

The ever-present threat of damage caused by overcurrents and transient overvoltages that can result in equipment loss, system failure and injury to electrical workers. Current market factors such as the need for greater productivity from existing facilities creating a demand for higher power system reliability, as well as the high costs of power distribution equipment and the time required to replace or repair it, make it imperative that serious consideration be given to electrical system protection. This forum brings together leading experts on electrical protection design and power system protection and control equipment and technologies. These non commercial, application-related presentations are designed to provide you with the latest information you need to keep your electrical protection schemes operating properly.

At the end of this workshop participants will be able to:

• Describe the fundamentals of Electrical Power Protection
• Identify and rectify the different fault types
• Perform simple fault and design calculations
• Work with protection system components (including fuses/transformers/circuit breakers)
• Complete relay settings and check a current transformer
• Demonstrate a fundamental knowledge of applications in protection

NEED FOR PROTECTION

• Selectivity, stability, sensitivity, speed, reliability, dependability, security FAULT TYPES & THEIR EFFECTS
• Active, incipient, passive, transient, asymmetrical
• Phase & earth faults

• Revision of simple formulae
• Calculation of short circuit MVA & fault currents
• Worked examples

• Solid, impedance, touch potentials
• Effect of electric shock
• Earth leakage protection

• History, construction & characteristics
• Energy let through & applications

• Current transformers: construction, performance, specification, magnetisation curves
• Voltage transformers: types, accuracy, connections

• Purpose & duty, clearance times, types

• Battery types, chargers, maintenance, D.C. circuitry

• Inverse definite minimum time (IDMT) relay
• Construction principles and setting
• Calculation of settings - practical examples
• New Era - modern numerical relays & future trends

DAY 2 CO-ORDINATION BY TIME GRADING

• Problems in applying IDMT relays

• Air & molded circuit breakers
• Construction and installation
• Protection tripping characteristics
• Selective co-ordination (current limiting, earth leakage protection, cascading)

• Differential protection - basic principles

• Cables
• Pilot wire differential
• Overhead lines
• Distance protection (basic principles, characteristics, various schemes)

• Phase shift, magnetising in-rush, inter-turn, core & tank faults
• Differential & restricted earth fault schemes
• Bucholz relay, oil & winding temperature
• Oil - testing & gas analysis

• Requirements, zones, types
• Frame leakage
• Reverse blocking
• High, medium & low impedance schemes

• Thermal overload, time constraints, early relays, starting & stalling conditions
• Unbalanced supply voltages, negative sequence currents, de-rating factors
• Phase faults protection
• Earth faults - core balance, residual stabilising resistors

• Stator & rotor faults
• Overload & over-voltage
• Reverse power, unbalanced loading
• Loss of excitation and synchronism
• Typical protection scheme for industrial generators

1:00 p.m. - 4:00 p.m.

FUSE FUNDAMENTALS
With this presentation, the participant will learn the fundamentals of circuit protection using fuses. There will be a review of overload conditions that exist in an electrical circuit, along with the evolution of fuses in the electrical industry.

The electrical industry started off with using fuse wire for protection, then to the cartridge body. Over time, this fuse became under-rated, and there had to be something better. HRC (high rupture capacity) fuses were adopted for their higher interrupting ratings, and along with these ratings, came greater degree of current limitation. These features allowed for better component and circuit protection.

Motor loads require specific protection schemes. When one looks at the motor control circuit, one finds that the fuse in fact protects the motor control circuit, NOT the motor. However, with time delay fuses, one may actually find back-up overload protection for the motor circuit. Transformers also require specific protection.

Power Semi-conductors require extremely fast acting, low let-thru energy fuses for protection. These semi-conductor devices can be found in Variable Frequency Drives, Soft Starts, or solid state relays. As the variable frequency drive industry evolved, internal DC Bus fuses have been designed out of the drives. However, drives still require input fuse protection. Ferraz Shawmut has designed a new generation of fuses in order to protect these power semi-conductor devices.

Arc Hazards produce many dangerous issues. This presentation is designed to show what some of these issues may be and how one can limit the issues and dangers associated with arcs, including how fuses can play a role in limiting these dangers.

Topics of discussion include:

• Review (low voltage fuses)
  
• Overload conditions
  
• Fuse construction & terminology
  
• Fault clearing & current limitation
  
• Co-ordination
  
• Applications (transformers, feeders, motors)
  
• Motor load protection
  
• Power semi-conductor protection (specifically Variable Frequency Drives & Soft Starts)
  
• Arc hazards and how to limit exposure to them.

GENERAL INFORMATION

When and Where
The Electrical Relays and Protection Strategies forum will be held as follows:

Toronto, ON - November 6-7, 2006
Park Plaza Airport Hotel
33 Carlson Court
Tel: 416-675-1234

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

Ottawa, ON - November 13-14, 2006
Chimo Hotel
1199 Joseph Cyr Street
Tel: 613-744-1060

Calgary, AB - November 13-14, 2006
Radisson Hotel Calgary Airport
2120-16th Avenue N.E.; Calgary, AB
Tel: (403) 291-4666

Edmonton, AB - November 20-21, 2006
Coast Terrace Inn
4440 Gateway Blvd.
Tel: 780-437-6010

Halifax, NS - November 20-21, 2006
Citadel Halifax Hotel
1960 Brunswick Street; Halifax, NS
Tel: (902) 422-1391

St. John’s, NF - November 27-28, 2006
Best Western Travellers' Inn
199 Kenmount Road; St. John’s, NL
Tel: (800) 261-5540

Winnipeg, MB - November 27-28, 2006
Hilton Airport Hotel
1800 Wellington Avenue; Winnipeg, MB
Tel: (204) 783-1700

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.