Blog Layout

Common Transformer Failures
SBS-NC, LLC Commercial HVAC & Electrical • April 21, 2023

The most common causes of transformer failures

     Transformer failures can lead to disruptions in power supply, equipment damage, and even safety hazards. Understanding the most common types of transformer failures is crucial for proper maintenance and timely intervention.

Here are some of the most common types of transformer failures:

  • Overheating: Transformers generate heat during normal operation, and excessive heat can cause the insulation materials to degrade, leading to short circuits or reduced transformer life. Overheating can result from overloading, poor cooling due to blocked cooling channels or malfunctioning cooling systems, and high ambient temperatures.
  • Insulation failure: The insulation materials in a transformer, such as the paper and oil, are crucial for preventing short circuits between turns or phases. Over time, insulation can deteriorate due to aging, moisture ingress, overheating, or exposure to corrosive gases. Insulation failure can lead to winding faults, bushing failures, and ultimately catastrophic failure of the transformer.
  • Winding failures: Transformer windings can fail due to short circuits, mechanical stress, or insulation degradation. Short circuits within the windings can occur when the insulation between turns or phases breaks down, leading to a localized increase in current and potentially causing overheating and further damage to the transformer.
  • Bushing failures: Transformer bushings serve as insulators and allow the passage of conductors through the transformer tank. Bushing failures can occur due to insulation breakdown, manufacturing defects, or exposure to harsh environmental conditions. A bushing failure can result in flashovers, oil leaks, or catastrophic transformer failures.
  • Tap changer failures: Tap changers are used to regulate the output voltage of transformers by varying the turns ratio. Failures in tap changers can result from mechanical wear, arcing, contact erosion, or contamination of the insulating oil. Tap changer failures can cause voltage regulation issues or even lead to a complete transformer failure if not addressed promptly.
  • Oil and gasket leaks: The insulating oil in transformers serves as both an insulator and a coolant. Leaks in the transformer tank, gaskets, or seals can lead to a loss of insulating oil, exposing the windings to air and moisture. This can cause the insulation to degrade, leading to transformer failure. Additionally, oil leaks pose an environmental and fire hazard.
  • Lightning and surge-related failures: Transformers can be vulnerable to damage from lightning strikes or voltage surges caused by switching operations or other disturbances on the power grid. Surge protection devices, such as lightning arresters, can help protect transformers from these events, but in some cases, the energy from the surge can still cause damage to the transformer's windings or insulation.


Regular inspection, maintenance, and monitoring of transformers can help identify potential issues early, reducing the risk of transformer failures and ensuring reliable operation.


    At SBS-NC, LLC, we recognize the vital role transformers play in maintaining the smooth operation of electrical systems in High Point, NC. Our team of dedicated, skilled electricians is committed to providing unparalleled service, ensuring your transformer repairs are handled with precision and care. We take the time to understand your unique requirements and concerns, developing tailored solutions that prioritize safety, efficiency, and longevity. With a strong emphasis on staying current with industry innovations and best practices, SBS-NC, LLC is the trusted partner you can rely on for all your electrical transformer repair needs in High Point, NC. Experience the difference our expertise, personalized attention, and unwavering dedication to customer satisfaction can make for your business. Call us Today!


Finding the right Commercial HVAC contractor in Greensboro, NC
By SBS-NC, LLC Commercial HVAC February 21, 2025
When it comes to keeping your business comfortable year-round, choosing the right commercial HVAC contractor is crucial. Whether you need AC repairs, preventative maintenance, or a full system replacement, working with a trusted and experienced HVAC provider ensures efficiency, reliability, and cost savings. At SBS-NC, LLC , we’ve been serving businesses in Greensboro, NC and across the Southeastern U.S. since 1991. Unlike many HVAC companies, we self-perform all HVAC work—no subcontractors, no delays—just expert service you can trust. Here’s how to find the right commercial HVAC partner for your business and why SBS-NC, LLC is the best choice. 1. Look for Experience and Expertise Commercial HVAC systems are complex and require a specialized skill set that differs from residential HVAC work. When selecting a contractor, consider: Years in business – SBS-NC, LLC has over 30 years of experience handling all aspects of commercial HVAC systems. Certifications and training – Our technicians are fully certified and continuously trained in the latest HVAC technologies. Industry specialization – We work with businesses of all sizes, from small offices to large corporate facilities, ensuring tailored solutions for your needs. 2. Prioritize a Contractor Who Self-Performs All Work Many HVAC companies subcontract their work, which can lead to delays, inconsistent quality, and hidden costs. At SBS-NC, LLC, we take pride in handling all HVAC projects in-house. This means: ✔ No middlemen—just direct service from trained professionals. ✔ Faster response times and seamless project management. ✔ Greater accountability for quality and customer satisfaction. 3. Ensure They Offer Comprehensive Services A good commercial HVAC contractor should be able to handle all of your business’s HVAC needs, including: Preventative maintenance to keep your system running efficiently and reduce unexpected breakdowns. AC repairs to quickly restore cooling and comfort in your building. RTU (rooftop unit) replacements for improved energy efficiency and performance. Emergency services for urgent HVAC issues that can’t wait. At SBS-NC, LLC, we specialize in all of the above, helping businesses in Greensboro, NC stay ahead of HVAC issues before they impact operations. 4. Check Customer Reviews and Reputation A company’s reputation speaks volumes. Before hiring an HVAC contractor, check online reviews and ask for customer references. We take pride in our long-standing relationships with businesses across Greensboro and beyond. Our clients appreciate our reliability, professionalism, and ability to deliver top-notch HVAC services without outsourcing the work. 5. Look for Energy-Efficient Solutions Energy-efficient HVAC solutions can significantly reduce your operating costs. A reputable contractor will offer energy-saving options such as: High-efficiency HVAC systems Smart thermostats and zoning systems Regular maintenance to optimize performance At SBS-NC, LLC, we help businesses upgrade their systems for maximum efficiency and cost savings, ensuring long-term benefits. 6. Choose a Contractor That Understands Local Needs Greensboro’s climate presents unique challenges for HVAC systems, from hot, humid summers to chilly winters. A local contractor like SBS-NC, LLC understands these regional factors and can recommend solutions tailored to your business’s needs. SBS-NC, LLC is Your Trusted Commercial HVAC Partner When searching for a commercial HVAC contractor in Greensboro, NC, don’t settle for anything less than a trusted, experienced, and self-performing team. At SBS-NC, LLC, we are committed to delivering high-quality AC repairs, preventative maintenance, and system replacements to keep your business running smoothly. If you’re looking for reliable commercial HVAC services in Greensboro , contact SBS-NC, LLC today. Our team is ready to provide expert solutions tailored to your business’s unique HVAC needs. 📞 Call us today to schedule a consultation!
ac services in Greensboro NC SBS-NC, LLC
January 21, 2025
With the right AC services, you can avoid making mistakes that hurt your commercial cooling systems. Keep reading to see the biggest ones we see.
heating contractor
December 26, 2024
There are a few important tips your local heating contractor can tell you about. Keep reading or contact us today to learn more.
Snow and Commercial HVAC Systems Winston-Salem, NC SBS-NC, L
By SBS-NC, LLC Commercial HVAC December 4, 2024
How Does Snow Affect Commercial HVAC Units? As winter sweeps through Winston-Salem, NC , business owners must consider how snow and ice impact their commercial HVAC systems . Whether you run a retail store, office space, or industrial facility, the performance of your heating and cooling systems can make or break your comfort, productivity, and energy efficiency . Snow poses unique challenges for commercial heating and HVAC systems, and addressing these issues promptly can save you from costly heating repairs . In this blog, we’ll explore how snow affects commercial HVAC units and offer practical tips to protect your investment. The Impact of Snow on Commercial HVAC Systems 1. Blocked Airflow Snow accumulation around rooftop or outdoor HVAC units can block airflow, causing the system to overheat or malfunction. Restricted airflow reduces efficiency, leading to higher energy bills and unnecessary strain on the equipment. 2. Frozen Components Ice buildup on heat pumps, coils, and condenser units can damage essential components. Frozen parts may crack, leading to costly repairs or replacements. Prolonged exposure to freezing conditions without proper maintenance could also shorten the lifespan of your commercial HVAC system. 3. Excess Moisture Melting snow introduces excess moisture into your system. If not drained properly, this moisture can lead to rust, corrosion, and electrical issues, all of which can compromise the performance of your heating equipment. 4. System Overload During colder months, commercial heating systems often work overtime to maintain a comfortable indoor temperature. Snow and ice further increase the workload, putting your HVAC unit at risk of overheating or breaking down. 5. Roof Damage For rooftop HVAC systems, the weight of heavy snow can damage structural supports, potentially misaligning or damaging your unit. This not only impacts performance but also increases repair costs. Preventing Snow-Related HVAC Problems Protecting your commercial HVAC system from snow in Winston-Salem’s unpredictable winter weather doesn’t have to be complicated. Here are some preventative measures: -Clear Snow Regularly: Ensure snow is removed from around outdoor units to prevent airflow blockage. Be cautious to avoid damaging the equipment during snow removal. -Schedule Regular Maintenance: Professional HVAC inspections before winter can help identify vulnerabilities in your system, ensuring it’s ready for colder weather. -Install a Protective Cover: Consider using a cover designed specifically for commercial HVAC systems to shield the unit from snow and ice without obstructing airflow. -Inspect Drainage Systems: Ensure proper drainage to prevent water from pooling and freezing in or around your HVAC unit. -Monitor Roof Conditions: If you have a rooftop HVAC system, inspect your roof regularly to ensure it’s structurally sound and free from excess snow buildup. When to Call for Professional Heating Repairs in Winston-Salem, NC Even with preventative measures, winter weather can sometimes lead to unexpected HVAC problems. If you notice inconsistent heating, unusual noises, or spikes in energy bills, it’s time to call a commercial HVAC professional in Winston-Salem. Prompt attention to these issues can prevent minor problems from becoming costly emergencies. Why Choose Us for Your Commercial HVAC Needs in Winston-Salem, NC? As trusted experts in commercial HVAC systems, we understand the unique challenges winter brings to Winston-Salem businesses. Our services include: - Comprehensive commercial heating maintenance - Quick and reliable heating repairs - Energy-efficient HVAC upgrades tailored to your business Don’t let snow and ice take a toll on your commercial HVAC system. Contact us today to schedule an inspection or repair and keep your business running smoothly all winter long. Contact Us Looking for dependable commercial HVAC services in Winston-Salem, NC? Call us today or schedule an appointment online. Let us help you stay warm and efficient this winter.
November 26, 2024
It's important to contact a heating contractor during autumn before winter arrives! Read this article to learn the reasons why you should do so.
Commercial HVAC Burners Winston-Salem, NC SBS-NC,LLC
By SBS-NC, LLC November 12, 2024
What Are Burners in Commercial HVAC Systems? Understanding Their Role in Efficient Heating and Repairs
mechanical contractors
October 31, 2024
In this article, we discuss how mechanical contractors can help your energy efficiency. Read on to learn more about this helpful topic.
air conditioning repair companies
October 21, 2024
In this post, we aim to debunk some of the most prevalent myths surrounding air conditioning repair companies. Let's get started!
September 27, 2024
Are you searching for reliable local air conditioning services? Read this article to learn about the questions you should ask prospective companies.
home air conditioning service
September 24, 2024
This blog post will discuss key indicators you might need to hire a home air conditioning service to ensure your home remains an oasis of comfort.
More Posts
Share by: