|
|
||||
|
|
|||||
| Harmonic Mitigating and High Efficiency Products: HPS | HTT | HET | HS | HEST | HTT2 | VFDS | CTT | HET.K | HET.L | CTT.A | ||||||||||||||||
|
Following, are the responses to the commonly asked questions regarding Transformers. Otherwise, should you wish to discuss an issue, which has not been addressed here, you are more than welcome to contact Synergy Energy Inc. using the Contact Us form: |
|||||||||||||||
What are the losses in transformers? There are two
types of losses
Synergy Energy
Inc.
transformers have copper winding. Copper has better electrical
conductivity than aluminum.
National Electrical Manufacturers Association (NEMA) has set guidelines for high efficiency, single phase and three phase dry type transformers. These efficiencies are called NEMA TP-1. Synergy Energy Inc.
is a proud
partner of Energy Star (www.energystar.gov) and As a transformer
manufacturer, we are required to meet NEMA TP-1 efficiency levels for
C&I (Commercial and Industrial) transformers.
NEMA TP-1 efficiency levels are available at: ENERGY STAR® Program Requirements for Commercial and Industrial Transformers What does NEMA TP-1 mean to a consumer? According to "Market
transformation for Dry-Type distribution transformers", transformers
that meet NEMA TP-1 efficiency levels can cut a facility’s
electric bill and pay back in about 3 years. What is the relation between high efficiency transformers and environment? When high efficiency
transformers are used, utility companies do not have to produce the
extra electricity and therefore, the generating stations that use
fossil fuel produce less Greenhouse gases. There will also be less need
for transmission lines, sub-stations etc. According to a study done by
the U.S. Environmental Protection Agency, to overcome the damages
caused by using ONLY seven 75kVA, K-rated transformers instead of high
efficiency NEMA TP-1 transformers, 10 Acers of trees have to be planted
and the extra production of electricity by a coal generating station
would create an extra 51 Tons of CO2, 402 kg of SO2 and 173 kg of
different Nitrate Oxides. We have to bear in mind that a 20-story
building can easily have 60 transformers.
Synergy Energy Inc. transformers are designed to meet and exceed NEMA TP-1 efficiency levels. In actual numbers, how does transformer efficiency relate to savings? There are two types of
savings associated with using high efficiency transformers. One is
economical and the other is environmental. The economical savings
affect the end-user and the utility companies. Would a low maximum temperature rise in a transformer save energy? To achieve a lower maximum
temperature rise in a transformer, the core size and the wire size is
increased. This means higher No-Load losses but lower full load losses.
Therefore, if a lower maximum temperature rise transformer is lightly
loaded (less than 45% typical), it uses more energy than a standard
temperature rise transformer but when the load levels go over 50% of
the rated capacity, the total losses start to decrease relatively. Also
when these transformers are heavily loaded, they produce less heat than
a standard transformer and therefore there is less need for cooling. Harmonics
are multiples of base frequency (base frequency in North America is 60
Hz) that when added together, form the actual wave form and depending
on the amount of different harmonics present in the electrical system,
the ideal sinusoidal wave can take different shapes. Synergy Energy Inc.
provides a wide
variety of Electromagnetic solutions for treating the harmonics.
Today’s loads draw
current differently compared to the loads in the 1980’s.
Equipment such as computers, monitors, copiers, fax machines, scanners,
printers, etc. were not so popular in the 80s. These days, three phase
Non-linear loads such as Variable Frequency Drives are also widely used
in the industry. Also, manufacturers are taking advantage of Robots,
Plasma cutters and other electronic and computer controlled equipment
that is relatively new to the industry. All these loads create
harmonics with damaging effects and need to be addressed accordingly. What are the most common types of harmonics? 3rd, 5th and 7th are the most
dominants types of harmonics that have the biggest magnitude and cause
the greatest damage. Single-phase electronic loads such as computers,
monitors, printers, copiers, scanners, fax machines, etc. have a wide
spectrum rich in 3rd, 5th and 7th harmonics. Three phase loads such as
Variable Frequency Drives create mostly 5th and 7th harmonics if they
are 6 pulse drives but 12 pulse drives would mostly create 11th and
13th harmonics.
Synergy Energy Inc. uses phase shifting technology to mitigate different harmonics. What are the effects of harmonics? Different harmonics have different effects on different parts of the electrical system. They can cause equipment malfunction, equipment failure, transformer overheat, reduction in transformer capacity (leading to electrical infrastructure over sizing) etc. Third harmonics and its odd multiples get trapped in the delta primary of a standard Delta-Wye transformer causing it to overheat and reduce its efficiency. The extra heat will also require extra environmental cooling that will increase the electrical consumption. Fifth and seventh harmonics pass right through the transformer and to the utility grid causing reduction of power factor therefore an increase in your utility bill. Synergy Energy Inc. uses different technologies to deal with different harmonics. If there are so many advantages to high efficiency transformers, why doesn't every body use them? Although it is proven that a
transformer with NEMA TP-1 efficiency can save a great deal of energy
and has a short return on investment but the lower first cost appeals
more than future environmental and economical benefits to most of the
contractors and building developers. The fact is that the end-uses will
end up paying for the inefficiency of transformers and the utilities
have to produce more electricity. Many studies are done by the
U.S. ORNL (Oak Ridges National Laboratory) in support of high
efficiency transformers that are readily available to the public
through their website www.ornl.gov Why shouldn't I use K-Rated transformer instead of a harmonic mitigating transformer? K-Rated transformers have the same winding design as a standard transformer and therefore do not mitigate harmonics. They are made bigger only to SURVIVE the damaging effects of harmonics and they do not improve Power Quality of the electrical systems. K-rated transformers are the bigger version of conventional transformers and therefore have higher losses, which means more energy consumption. More energy consumption means that utilities have to produce more electricity resulting to higher levels of Greenhouse gases. Synergy Energy Inc. harmonic mitigating transformers are not K-rated but they are designed to withstand load profiles of up to K-30. Yes, we can provide leasing options on our transformers. |
||||||||||||||||
| Home | About Us | News | Products | Innovations | FAQ | Quotation | Resources | Contact Us | ||||||||||||||||
| ©Copyright - Synergy Energy Inc., Unit 9 - 3182 Orlando Drive, Mississauga, ON, L4V 1R5, Canada | ||||||||||||||||
| Best viewed on Microsoft Internet Explorer & Mozilla Firefox | ||||||||||||||||
