Leadership in Technology - Summer 2016

VOLUME 10 • ISSUE 2 • July 2016

CANADIAN LEED BUILDINGS have reduced over 1 million tonnes of CO2e in GHG emissions since 2005

SELF-DRIVING CARS

What happens after self-driving cars come to Canada?

TRANSFORMER HUM Does it make you nervous?

our future. our choice.

Publications Mail Agreement # 42456014

www.technova.ca

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LEADERSHIP IN TECHNOLOGY Summer 2016

Leadership in Technology is the official newsletter of TechNova, the Society of Certified Engineering Technicians and Technologists of Nova Scotia.

Leadership in Technology is published biannually by:

202 Brownlow Avenue Cambridge 1, Suite 308 Dartmouth, NS B3B 1T5 Tel: (902) 463-3236 Fax: (902) 465-7567 Toll Free: 1 866 723-8867 info@technova.ca www.technova.ca Please direct all inquiries, submissions and subscription requests to TechNova at the above address.

Leadership in Technology is published in conjunction with:

From the Editor 4 President’s Letter 6 New Members 7 Canadian LEED Buildings 8 AGM 2015 12 AGM Pinning Ceremony & Life Members

Design Works Publishing Group 331 Lacewood Dr. Unit 111 Halifax NS B3S 1K6 Tel: (902) 982-3099 Fax: (902) 482-5118 dmgcreative@gmail.com

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Self Driving Cars 18 Transformer Hum 20 Association News 21

EDITOR Mike MacLean, CET EDITORIAL DIRECTION Vivian Ernst CREATIVE DIRECTOR Mario Zamfir The opinions expressed in this publication are not necessarily those of the Association. TechNova assumes no responsibility or liability for damages arising from any error or omission or from the use of any information or advice printed in this publication.

Letters regarding the newsletter should be addressed to the Editor at the Society’s address.

Publications Mail Agreement # 42456014

STORY IDEAS WELCOME Leadership in Technology strives to present news, stories and other content in the course of each year that is of particular interest or pertinence to TechNova members. We rely in part on your input to guide and generate articles.

This is your publication and you are always encouraged to contribute.

NEWS: Your technology career is ever-changing. Let others know about the changes and trends in your particular field, discipline or worksite.

PROFILES: Want to share your own story? Leadership in Technology is a great way to demonstrate the ways that members utilize technology in their careers.

FEEDBACK: Write to us and share your viewpoints (members and nonmembers alike). Write to info@technova.ca or send your letter/article to the TechNova office. www.technova.ca

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From the Editor It’s an exciting time to be part of TechNova!

The association is in the midst of a transition to a new executive, led by President Mark Bamford, myself as Vice-President and Mark Cormier as treasurer. Our two-year terms began as of the AGM this past April. We have a common vision on how we’d like to see the association benefit the membership best over the next few years, and this will include implementing new programs, improving existing policies and procedures, and ensuring the association continues to be a leader in certification.

Speaking of the AGM, we were very pleased with how our meeting went in April. We made many changes, including moving the meeting to April (to hopefully avoid nasty weather), changing venues to a more modern site which allowed more flexibility, and most importantly, we wanted to bring a slightly more casual feel to the meeting, allowing for a shorter meeting without sacrificing the information being delivered by the various council and committee members. We’ll be finetuning our process in time for next year, and if April’s turnout is any indication, we’ll need a larger room!

With my new position of Vice-President, I’m handing over communications duties to Sam Younis, and as such, this is my final newsletter as editor. Sam brings fresh ideas, technical expertise and a strong work ethic to TechNova, and these traits will ensure that the newsletter will be in good hands moving forward.

I’m eager to serve in an executive capacity, but my term as Communications Director was extremely fulfilling. The project I’m most excited about is the addition of the smart board video conferencing / collaboration equipment that we’ve implemented. This has given us a quantum leap in capability, allowing members of council and the certification board to participate in monthly meetings from points all over the Maritimes. Though there were some smaller projects that I wasn’t able to complete during my term, I’ll be offering support to Sam as he tackles these over the next few years.

Mike MacLean, CET Editor, Councillor and Communications Director

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LEADERSHIP IN TECHNOLOGY Summer 2016

EXECUTIVE COMMITTEE President Mark Bamford, CET Vice-President Mike MacLean, CET Treasurer Mark Cormier, CET Councillors Sean Piercey, CET Sam Younis, CET Joy Brown, CET Louis LeBel, CET Alan Attwater, CET Patrick Lukeman, CET Certification Board Doug Bach, CET, P.Eng, Chair David MacMillan, CET Dawn Ryan, CET Don Jardine, P.Eng, CET (Hon) Ian Mitchell, CET Sam Younis, CET Patrick Lukeman, CET Mike Rushton, CET Joe Simms, CET, Registrar Sean Piercey, CET CCTT Director Sean Piercey, CET CTAB Director Joy Brown, CET Communications Director Mike MacLean, CET Sam Younis, CET Registrar Joe Simms, CET Executive Staff Officer Joe Simms, CET Office Manager Vivian Ernst

CODE OF ETHICS INTERPRETATION GUIDELINES The Code of Ethics and Interpretation Guidelines provide a resource for members of TechNova. They also serve as a study guide for all new applicants who must complete the Ethics Exam as part of the certification process.

Preamble: In the course of their work, members of TechNova should use their expertise to heighten the quality of life for all people. Further, they should practice their professions honourably and ethically in order to earn the confidence and respect of the public, their clients, employer, and their fellow members.The purpose of this Code is to enumerate and elaborate upon basic principles of ethical conduct that apply to members of TechNova.

The following Code of Ethics shall be interpreted as a guide only, and not as a rejection of the importance of other duties not explicitly listed.

Members of TechNova shall: 1. At all times, act with professional integrity, faithfulness to the needs of the public, and fairness and loyalty to their client or employer and to their fellow members. Relations with the Public 2. Regard their duty to public welfare as paramount and take due care for the safety of life and health of the public who may be affected by the work for which they are responsible.

Relations with Clients and Employers 3. Act for each client or employer as a faithful agent or trustee and act with fairness and justice between each client or employer and the contractor where contracts are involved.

4. Present clearly the consequences to be expected from deviations proposed if their judgment is

overruled by a non-technical authority in cases where they are responsible for the technical adequacy of applied science technology work.

5. Engage or advise their client or employer to engage, and cooperate with, other experts and specialists whenever the client or employer’s interests are best served by doing so.

6. Promptly disclose any conflict of interest to their client or employer and refrain from engaging in activities which will affect or compete with the business of their client or employer except where they have their client or employer’s consent.

Relations with Other Engineering and Applied Science Technicians and Technologists.

7. Keep informed of technological advances and endeavour to provide opportunities for the technical development and advancement of engineering and applied science technicians and technologists in their employ.

8. Take care that credit for engineering work is given to those to whom credit is properly due.

9. Not, directly or indirectly, injure the technical reputation, prospects or practice of another engineering technician or technologist.

10. Compete with other engineering technicians and technologists fairly and in good faith.

11. Present information to the proper authority for action where another engineering technician or technologist is guilty of unethical, illegal or unsafe practice and not become associated in responsibility for work with that engineering technician or technologist.

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From the President Dear Members, Well it seems as if spring is finally here with summer not far behind. With the nice weather we tend to spend more time outdoors be it tending the yard, going for a bike ride or taking a trip somewhere. This is a time to be extra vigilant and aware of our surroundings.

Each year Technova awards a number of bursaries to students attending Secondary Education.

For more information on the criteria please visit our website or call the office.

We have complete our AGM and with it we had a record turnout. My thanks to all members who showed up and supported us with your questions, comments and responses to all the motions.

In 2018 we will be hold the 2017 AGM. This is an important benchmark for us as it will mark 50 years since the inception of Technova or as it was known then SCETTNS (the Society of Certified Technicians and Technologists of Nova Scotia). We would like to make the 2017 AGM a time to be remembered and to that end we are soliciting any ideas or thoughts on how we can celebrate our anniversary.

All of our meeting and boards require a certain number of members to have a quorum. Without quorum the intended meeting cannot officially be held and this can sometimes delay important activities and communications. We now have up and running our smart board and with this we are able to communicate and hold meetings with members not able to attend the office. If you feel you would like to take advantage of this technology and become a member of the council or a member of the certification board please don’t hesitate to contact our office.

Another important task that Technova does is the yearly certifications of NSCC programs. The certifications give our youth a better chance to find employment here in Nova Scotia, across Canada and even to certain countries in the world. We are always looking for people across all disciplines to help us ensure the students of the programs have every advantage once they graduate.

In closing I wish you all a safe and happy summer with the hopes that we all look forward to a new and exciting year

Mark Bamford, CET President

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LEADERSHIP IN TECHNOLOGY Summer 2016

NEW MEMBERS NOVEMBER 2015 - APRIL 2016

Associate Technologists Teaira Cain Matt Appleby Breagh MacDonald Carlos Tejada Tyler White Certified Engineering Technologists (CET) Leah Darche Kimberley Murphy Adrian Spencer Aaron Thibault Robert Streatch Nicholas Young’ Darryl Moss Eric Gale Christopher Cholock Kraig Porter Grigori Perlroizen

Certified Engineering Technicians (C.Tech) Tyler Brownless Stephen Fyfe Jeremy Shaw Jason Nippard W. Cameron Fraser Sarah Howitt Conrad Petrikowski Gary Taylor Murray MacDonald Michael Ritchie Melissa Risser Pierre-Oliver Cool Sheila MacMillan Transfers In Mark Batt Transfers In Michael Fox Charles Maillet

Karen Borgal Giles Surette Francis Wilson Donald Mole Kirk Kendell Upgrade from Associate Technologists to Certified Engineering Technologists Mason Croucher David Eichhorn Mohammad Yousif Al-Miari Victoria Brewer John-Francis Rooney Students James Lake Joshua Goodwin Jonathon Wilson Lauren Madore

Carl Bradley Matheson Robert Thomas Jason Pratt Ashley O’Connor Heather Armstrong Paul Savory Nicholas Corkum Megan Irons Nicholas Treadwell Kyle Oickle Jim Coleman Kyle Hicks Andrew Whalen Mason Forward Aaron Gabriel Mendoza

stronger. together. www.technova.ca

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Canadian LEED Buildings have reduced over 1 million tonnes of CO2e in GHG emissions since 2005 Green building in Canada has reached a significant milestone, as the Canada Green Building Council (CaGBC) announced today that Canadian LEED certified projects have now led to a cumulative reduction of over one million tonnes of CO2e in greenhouse gas emissions – the equivalent of taking 238,377 cars off the road for a year.

This announcement comes as Canadian governments at all three levels are accelerating efforts to formulate climate change strategies. As the voice for green building in Canada, CaGBC supports sustainable infrastructure as one of the most practical and effective solutions to our changing climate. This is demonstrated by the GHG reduction and a number of other big impacts (calculated cumulatively between 2005 and the end of 2015) that show how green buildings have benefitted Canadians: • Energy savings of 6,503,647 eMWh which is enough to power 220,702 homes in Canada for a full year.

• Water savings totalling 12.8 billion litres, the equivalent of 5,131 Olympic-sized swimming pools.

• Recycling over 1.6 million tonnes of construction/ demolition waste which represents 491,174 garbage truck loads.

• Installing 231,608 sq. metres of green roofs, or an area the size of 153 NHL hockey rinks, to reduce the urban heat island effect and mitigate storm water flows in urban areas.

In addition to these key impacts, the CaGBC has also announced that in the first quarter of 2016 it certified the 1000th LEED Gold project in Canada. LEED Gold, the second most rigorous level of certification, now makes up 38 per cent of all LEED certified projects in Canada – the highest percentage of all levels. This is evidence of the industry’s enhanced capability to

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LEADERSHIP IN TECHNOLOGY Summer 2016

achieve higher levels of building performance.

The market penetration of LEED certified buildings in Canada has been growing over the last decade, from 0.8 per cent across all asset classes for the period of 2004-2009, to 10.7 per cent for all new construction floor space (2009 to 2014). The growth of LEED is projected to generate approximately $59.1 billion in direct dollar gross output, $25.44 billion in GDP, and create almost 330,000 direct jobs over the lifetime of the buildings1.

“The CaGBC, its members and stakeholders, have been working for the past 14 years to mitigate the effects of climate change through green buildings and sustainable communities,” says Thomas Mueller, President and CEO of the Canada Green Building Council. “These two milestones are a tribute to the efforts of the Canadian green building industry who have been at the forefront of the push toward a lowcarbon economy. Owners and developers, practitioners and builders didn’t wait to take action but have led the charge toward maximizing the environmental and health benefits of building projects across the country.

We are encouraged to see such strong results and look forward to continuing our work with the public and private sectors to ensure this momentum continues.”

Overall, LEED certifications in Canada continued to have steady growth in the first three months of the year, with 106 registrations and 91 certifications – bringing the total number of LEED certified projects in Canada to 2,675. Year-to-date-totals (up to March 31, 2016) by LEED certification level are as follows: • 18 LEED Certified • 32 LEED Silver • 35 LEED Gold • 6 LEED Platinum

Among the most notable projects that earned LEED certification in Q1 of 2016:

TELUS Garden Office Tower

Q-Plex Sports and Wellness Centre

This one million square foot development in the heart of downtown Vancouver includes a 47-storey residential tower that is currently under construction and will also be targeting LEED. Sustainability features that led to its LEED Platinum certification include: a district energy system that will reduce demand from conventional energy sources by up to 80 per cent and reduce carbon dioxide emissions by more than one million kilograms a year (according to TELUS); one of Vancouver’s largest solar panel collections on the office’s rooftop; and garden terraces on six levels planted with a community food garden, including hundreds of plant species.

This 7,000 square metre facility is located near nature trails and surrounded by sports fields in the heart of a growing community within the Kennebecasis Valley. Sustainable features included the use of a geothermal heat recovery system which heats the arena and pool, a storm water management pond, and the ongoing measurement and verification of energy performance to ensure maximum building efficiency. This project’s certification represents the town’s commitment to minimizing their environmental impact, both of the new facility and its subsequent operations.

in Vancouver, BC, which certified LEED Platinum.

in Quispamsis, NB, which certified LEED Gold.

LEED Gold projects in Canada also surpass 1,000 in first quarter of 2016 REPUBLISHED SOURCE

http://www.cagbc.org/News/EN/2016/20160421_News_Release.aspx

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WELCOME TO THE ATLANTIC CAGBC CHAPTER! The CaGBC is Canada’s only member-based organization that is purely dedicated to the advancement of green building across the country. Together, with our members here in the Atlantic provinces, and the vast network of industry professionals associated with our other six Chapters across the country, we can all play a vital role in the advancement and successful transformation of Canada’s built environment.

In addition to the numerous benefits associated with membership such as discounts on education and events, access to information and Canada’s largest network of green building professionals, your membership plays a valuable role in the Council’s advocacy work and development and deployment of green building education.

NEW! It is easier than ever before for individuals to get involved with the green building industry at the local level.

For more information on how to become a member, please contact: Lara Ryan lryan@atl.cagbc.org Tel: (902) 229-1580

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CaGBC-Atlantic Canada 185 Ferguson’s Cove Rd. Ferguson’s Cove, NS B3V 1L7 Canada

LEADERSHIP IN TECHNOLOGY Summer 2016

GET YOUR TECHNOVA MERCHANDISE!

All prices include embroidery and setup, freight and tax is extra. Prices based on stock availability at time of ordering.

Allow 10-14 days for delivery. www.technova.ca 11

The 2015 Annual General Meeting took place on Saturday, April 2, 2016. The meeting was very well-attended, with the number of attendees surpassing our estimates. In addition to moving the meeting to April, we held the meeting at the Hampton Inn and Suites in Dartmouth Crossing, a newer and more flexible venue.

Spearheaded by Mark Bamford, TechNova introduced a new component of the AGM - a pinning ceremony honouring long-serving members of the association. Recipients were awarded a certificate and a lapel pin.

Special congratulations to Louis LeBel and Keith Wren, who were given the honour of Life Membership.

The Ray Fiske Scholarship Award and the Meloche Monnex Continuing Education Bursary were awarded at the AGM, with Paige Kourtney Power the recipient of both awards.

Congratulations!

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Summer 2016 LEADERSHIP IN TECHNOLOGY Winter 2015

A special thanks to Rick Tachuk of CCTT for giving an interesting and informative guest speech on the initiatives that our national association is undertaking.

On behalf of the executive and council, I thank the members who were able to join us at the meeting, and I hope that next year we’ll continue to see the attendance increase.

Kindest regards, Mike MacLean, CET Vice-President

Paige Kourtney Power receiving the Ray Fiske Award and Meloche Monnex Bursary

A larger room will be needed next year!

President Mark Bamford calling the meeting to order

Rick Tachuk addressing the members

A standing room only turnout www.technova.ca

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Pinning Ceremony & Life Members

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LEADERSHIP IN TECHNOLOGY Summer 2016

Registrar’s Report 2016 Greetings to all our existing members and a warm welcome to those who just joined TechNova!

Below is a brief summary of the Registrar’s Report and I have taken the liberty to highlight some of the activities presently underway at TechNova.

It has been encouraging to see an interest from members wishing to sit on Council and on the Certification Board, again welcome to all!

1. To date we have welcomed 37 new members into the Society since January 1, 2016.

These new members are made up of certified and associate members in both Technician and Technology professions.

A majority of the successful applicants were from accredited programs in Nova Scotia and other provincial associations.

2. No members have been transferred to other provincial associations since 2015, while 3 members have transferred to Nova Scotia.

3. Our Certification Board is receiving more and more applications from internationally trained and experienced individuals. The trend is expected to continue increasing. These applications are notably more difficult to

process than applications from graduates from Canadian Engineering and Technology programs.

4. Nova Scotia has passed the Fair Access to Regulated Practice Act (FARPA). Under the purview of the Minister of Labour and Workforce Development, FARPA, which specifically names SCETTNS in the act, commits all regulating bodies in the province to provide a welldefined systematic approach for professional recognition, ensure foreign credentialed professionals receive fair consideration, and ensure high standards of professional practice in the interest of public safety.

5. Our proposal included: the development of an international qualification assessment (IQA) methodology that values fairness, transparency, timeliness, consistency, and impartiality; the creation of an online application and selfassessment tool to increase our capacity to process and manage IQA applications; 6. So recently we introduced the self-assessment tool, known as the TQAC or Technology Qualification Assessment Canada. Our self-assessment

tool is designed to provide potential applicants with TechNova an opportunity to explore their professional profile and competencies against the National Technology Benchmarks™. This program can also be used by applicants from non-accredited programs to complete a self-assessment, and in so determine where they fit when compared to the National Technology Benchmarks.

7. The CIC funding project is well under way, and an update will be presented to Council and the Certification Board over the next coming months.

8. We are now in the process of hiring summer student, through funding from Canada Summer Student Program 9. In June awards will be handed out to students from accredited programs. A total of 15 student awards will be handed out.

A big Congratulations to all recipients for the 2015 - 2016 academic year.

Yours in membership Joseph Simms, CET

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What happens after self-driving cars come to Canada?

How do you convey the magnitude of something that sounds, to most people, like science fiction? By referencing science fiction of course.

The last time anyone saw a self-driving car was probably in the 2004 film iRobot.

Will Smith’s character Del Spooner, a gruff, antitechnology detective who doesn’t trust anything with circuits, decides to drive manually at speeds that should only be attempted by a computer. His co-star Dr. Susan Calvin, played by Bridget Moynahan, scolds him for being so reckless.

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The film is set in the year 2035.

What’s striking about that scene is that even when making a movie about what almost becomes the robot apocalypse, the filmmakers couldn’t fathom a driving scenario more advanced than one where human beings are still the primary vehicle operators.

Keep in mind, the film was released over ten years ago. Today, what once seemed farfetched enough to be featured in a film that predicts how technology will take over the world, is about to become a reality in 2016.

LEADERSHIP IN TECHNOLOGY Summer 2016

“I look back at the 20th century on how vehicles changed the everyday lives of individuals. In this century, autonomous vehicles will have an impact of equal magnitude, on everything we do,” argues Barrie Kirk at Planning the Next Disruptive Technology conference on Tuesday.

Kirk is the executive director of CAVCOE, the Canadian Automated Vehicle Centre of Excellence. He’s spoken at event after event on this subject, including a Future of Four Wheels Transportation panel at Ryerson University’s Digital Media Zone in February.

He’s completely grey, and his accent reveals him as being from the U.K., where he received his designation as a Professional Engineer.

Today, the self-driving car has many names including autonomous vehicle, automated vehicle technology, driverless car, and even just AV, as they’ve become known to the regulars at these conferences.

Kirk’s basic argument echoes that of every other speaker on the panel today. Yeah, we could just open the door and let self-driving cars in, but why not use them to our

advantage along the way?

The question on everybody’s lips is, how long should we wait to get started?

“Let’s say that by 2030, the data is in and we know that computers are better drivers than silly, stupid humans.

Is it really ethical to allow humans to cause all that carnage on the road?” asks Kirk in response.

At this point, the energy in the room shifts and a panel discussion ensues.

Government representatives from both the City of Toronto and the Province of Ontario straighten their ties and prepare to convince the now eager listeners to ignore that last point.

He goes on to argue that when a full penetration of autonomous vehicles is achieved, societies may very well see an 80 percent drop in vehicle collisions. He adds that over half of citizen interaction with the police is traffic related, meaning that self-driving cars could free up law enforcement to deal with other issues more thoroughly.

The brains of the operation at the City of Toronto is a man by the name of Stephen Buckley. A slight man who talks a mile a minute, he takes the podium and clears his throat.

“I think we have an opportunity here.” He says. “From a municipal standpoint, what really scared me was this.” He throws a picture of Google’s self-driving car up on the screen.

Self-driving cars pose a

He goes on to say that they

whole slew of benefits to the individual. In a lot of ways, self-driving cars mean a better world for you and for me. However, the changes won’t stop there.

planned to build the product from top to bottom. From the hardware to the software, Google stood to control the technology and everyone else who wanted to use it.

The price probably wouldn’t be too outrageous because, in his words, “They have more money than God.”

His bottom line? There’s no time like the present. Where it becomes controversial is that he suggests an Adam Smith-inspired strategy to make Canada a leader in this space is to let the private sector develop without government intervention; basically, keep the law out of it.

After seeing in 2008 an image of an automated version of a Toyota Prius built

by Google, Buckley went to work. Just this past February, he debuted the findings of his research team, based out

of the University of Toronto, to a meeting of over 40 City of Toronto division heads.

The finding showed that one of three scenarios would likely come to pass. The first, is simply an extension of the private ownership model.

Regular cars are simply replaced with autonomous vehicles and not much else changes.

The second scenario depicts a complete shift in the way Canadians think about mobility and vehicle ownership. He calls this model “mobility as a service,” which will see a conversion from private vehicle ownership to vehicle sharing companies like Uber and BlancRide. In this scenario, almost no one owns or feels the need to own their own car. In addition, transportation as a service stands to add an extra

$65 billion per year to the Canadian economy and save the average family $3,000 per year.

The third scenario, which he stated was probably the most likely, is a mix of private ownership and mobility as a service.

“Overtime, this may transform mobility as we understand it. It may impact how we build, design and operate cities.”

He understands that new and disruptive technology will likely invoke a “winner takes

all” mentality among private companies. His argument is that the public sector needs to act soon, or other parties will act first. In an effort to do just that, the Ministry of Transportation opened up Ontario streets for testing autonomous vehicles this past January.

Buckley goes on to argue that self-driving cars will have a different impact depending on which location they’re placed in. “There will always be people who want to own their own vehicle, but urbanites might not be interested in owning as much,” he said. Either way, he says, regulators need to inform themselves of this fast-approaching trend.

Autonomous vehicles are coming, that part is clear. However, sitting around the table are some extremely different ideas

for implementation. Buckley concludes his presentation by asking, “how do we harness AV technology to get the city we want?”

Whereas those opposing him ask, can something so disruptive be harnessed?

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Transformer Hum Does it make you nervous?

Where Does the Sound Come From?

Noise is caused by magnetostricition (changes in shape) of the core laminations while the transformer is energized.

Transformers emit a lowfrequency, tonal noise that people living in their vicinity experience as an irritating “hum” and can hear even against a noisy background.

The electrical power industry produces a range of solutions to abate humming, which originates in the transformer’s core and, when it is loaded, in the coil windings. Core noise is generated by the magnetostriction of the core’s laminations when a magnetic field passes through them.

It is also known as “no-load noise”, as it is independent of the load passing through the transformer.

As the phenomenon occurs it causes air columns to be formed in the spaces between the transformer core and the low-voltage windings of the core and other adjacent parts of the transformer, and these air columns cause audible noise as it moves between the various parts of the transformer.

Magnetostriction takes place at twice the frequency of the supply load: for a 60 Hz supply frequency, a lamination vibrates at 120

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cycles per second, and the higher the density of the magnetic flux, the higher the frequency of the even number harmonics.

Also, the audible sound produced by fan-assist cooled (FAC) transformers is partially due to the energizing of the core by the alternating voltage applied to the windings and also by the fans forcing air through the coils. The noise generated by the core, and whose fundamental frequency is twice the frequency of the applied voltage, will create audible sound that will be present even under no load conditions.

The vibrations producing audible sound can occur in the core, coil, mounting, housing, and in the conduit.

The transmission of sound from the transformer can be by various media such as air, metal, concrete, wood or any combination.

Amplification of audible sound can occur in a given area due to the presence of reflecting surfaces.

Transformer hum also arises through the vibration caused when the load current passes through the windings, interacting with the leakage flux it generates. This “load noise” level is determined by the size of the load current.

Control of Transformer Sound Transmission

LEADERSHIP IN TECHNOLOGY Summer 2016

Acoustical-absorbing material should be mounted on reflecting surfaces to reduce sound reflection and possible amplification.

Transformers should be mounted on a firm support having as great a mass as possible.

Vibration pads or properly designed isolation mounts under the transformer will reduce transmittal of sound.

The neoprene rubber isolation pads (Figure 2) provided with the unit should be installed between the transformer and its mounting surface. is will reduce case vibration and compensate for slight unevenness of the mount. Care must be taken to ensure proper and tight installation of conduit. Flexible conduit is recommended.

A normal conversation is typically 60-70 dB. OSHA has an actionable level to sound exposure at 85 decibels whenever noise levels equal or exceed 8 hour time weighted average sound of 85 decibels, or a dose of fifty percent (29 CFR 1910.95(c)(1).

Per General Electric Installation Guide No. 475A667AAP008, dry type transformers are designed and manufactured to comply with NEMA and ANSI standards. e decibel values referenced below (Figure 2) represent average

values obtained in a sound laboratory per industry standard test procedures.

So who is to say what sound is undesired or interferes with something? What may be a calming sound of transformer (humming to some), may be a nuisance to others.

Just as rock concerts may be annoying to some, and the loud music and rhythm may be stimulating and desirable to others.

And since different people have different opinions as to what is acceptable and what is not, and how annoying a transformer has become is different in different situations, the best tactic is to try and mitigate the problem on the front end through proper placement and design.

When initially tested and commissioned make sure you carefully inspect the shipping bolts, packing materials, and resilient mounts so sound is kept at a minimum. Removal or loosening of the shipping bolts will allow for a smooth transfer of vibration and should reduce the overall noise generated by the unit.

Reference // Dry Type Power Transformers: Understanding Transformer Isolation and Noise by Ron. A. Widup, Executive Vice President/General Manager of Shermco Industries

REPUBLISHED SOURCE http://electrical-engineering-portal. com/transformer-irritating-hum

CCTT RENEW YOUR MEMBERSHIP ONLINE IN 4 EASY STEPS You no longer have to wait for your renewal statement to arrive in the mail. The convenience of renewing your membership online is here.

To renew online you will need: • Your credit card.

To renew online, follow these 4 easy steps: 1.

2.

3.

4.

Go to TechNova website (www.technova.ca).

On the homepage, click on the link to pay online.

Select your membership type from the menu.

Next, follow the online instructions.

If you have questions or require assistance, please call toll free: 1-866-723-8867

CCTT ON-LINE JOB BOARD NOW AVAILABLE CCTT is pleased to announce that it has launched a NEW job posting online service. This service may be used by CCTT partners and its goal is to bring job seekers and employers in the technology field together.

The portal is divided into three main categories: Industry Jobs, Academic Jobs and Government Jobs.

Interested candidates seeking employment may view listings and obtain information on job opportunities at no charge.

To access the service visit www.cctt.ca and click on the CCTT Jobs button on the home page, or go directly to http://jobs.cctt.ca.

MELOCHE MONNEX CONTINUING EDUCATION BURSARY*

The Meloche Monnex Continuing Education Bursary awards $1000 (actually two awards of $500.00 each) to a member, or child of a member, who is enrolled in a recognized technology program at the post-secondary level. The winner is selected at random from all eligible applicants. 1st of October. Entries must include proof of enrollment.

2016 Receipient : Paige Kourtney Power

AWARDS & BURSARIES Provincial Awards & Bursaries • • • • •

RAY FISKE EDUCATION AWARD*

Named in honour of long-time Registrar Mr. Ray Fiske, P.Eng., CET (Hon.), TechNova awards a $500 bursary each year to the son or daughter of a member who is undertaking post-secondary studies.

The winner is drawn at random from all qualified applicants. The deadline for entries is 1st of October.

2016 Receipient: Paige Kourtney Power

President's Awarrd The Ray Fiske Memorial Award for Service Excellence Meloche Monnex Continuing Education Bursary Ray Fiske Education Award Student Achievement Awards

National Awards & Bursaries • • •

National Achievement Award Manulife Scholarship Canadian Technology Scholarship

* To apply, simply send a letter along with the name of your son or daughter and proof of his/ her enrollment at a college or university. See our website (www.technova.ca) for more information.

www.technova.ca

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202 Brownlow Avenue Cambridge 1, Suite 308 Dartmouth, NS B3B 1T5 Tel: (902) 463-3236 Fax: (902) 465-7567 Toll Free: 1 866 723-8867 info@technova.ca www.technova.ca

ADVERTISING GUIDELINES 2014-2015 advertising rates 20% discount for 2 issues

NEW

$1750

$2800

$1500

$2400

$1100

$1760

$1100

$1760

$800

$1280

$400

$640

$250

$400

Submit an article relevant to our industry and receive a 5% discount on all advertising

MECHANICAL SPECIFICATIONS Digital File Requirements • All ads must be supplied as PDF/X 1a (press optimized, fonts embedded, Acrobat distiller), converted to CMYK. •

Ensure that all images are a minimum of 300ppi at 100% of final placement size.

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Text type should be a minimum of 8 point; reverse type minimum 12 point. Leadership In Technology and its suppliers are not responsible for reproduction of type sizes smaller than those mentioned.

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Convert all spot/special colours to four colour process. Please provide CMYK files only. Do not submit files in RGB.

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Ads may be supplied on CD or DVD, or uploaded onto our FTP, and must be accompanied by a colour proof.

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All proofs must be made from the original file and include trim, cropmarks, and bleed (0.125”), if required.

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Filenames for PDFs should consist of: advertiser name_ad size_issue date (example: Gallery_1/4pgH_summer11).

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Advertisers and/or advertising agencies assume full responsibility for all contents of advertisements and any claim made against Leadership In Technology because of such content.

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Supplied colour proofs are only an approximation of colour reproduction.

Leadership In Technology and its suppliers aim for pleasing colour throughout the proofing/printing process.

PUBLICATION DATES SPRING/SUMMER EDITION Deadline: April 1, 2016 Delivery: July 10, 2016 FALL/WINTER EDITION Deadline: October 15, 2016 Delivery: December 15, 2016

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LEADERSHIP IN TECHNOLOGY Summer 2016

www.technova.ca

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stronger.together.

innovative I diverse I creative I multi-national I unique

MEMBERSHIP HAS ITS BENEFITS

902 463-3236

Call now to join.

TechNova, the Society of Certified Engineering Technicians and Technologists of Nova Scotia.

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LEADERSHIP IN TECHNOLOGY Summer 2016