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Midstates Energy

Transformer Electrical Components Maintenance – LoadTap Changers

Load Tap Changers are critical electrical components for maintaining a consistent voltage level to combat local or grid fluctuations. LTCs regulate the turns ratio and voltage ratio without interrupting the load current. The LTC can increase or decrease output voltage as needed by changing the tap position. Regular maintenance is vital to extending the life of load tap changers and keeping transformers
performing at peak efficiency.

Load Tap Changer Maintenance

MidStates Energy, LLC, provides transformer inspections, maintenance, and emergency service across the United States. Our trained and experienced team handles load tap changers inspections, overhauls, and contact replacements as needed on regular maintenance schedules or when breakdowns occur.


This visual inspection includes checking the motor-drive counter that registers every tap-change operation, oil level checks, breather checks, and examining inside the motor-drive cabinet for any noticeable problems. This inspection is carried out while the transformer is operating and requires no interruptions of service.


The contact life, the frequency of operations, or the time in service determines the interval between
necessary overhauls. A counter inside the motor-drive cabinet records load tap changer operations. Most transformer manufacturers recommend an LTC overhaul at one-fifth of the estimated contact life. An overhaul can include oil and breather changes and other repairs as necessary.

Contact Replacement

Contacts are designed and built to last through many switching operations. Most transformer load tap changers average around 20 switches per day. Electrical transformers have a rating plate stating the estimated contact life at rated loads. Contact replacement may be necessary at least once during the lifetime of a transformer.

Why Is LTC Maintenance Important?

Regular maintenance is critical for trouble-free operation and to prevent power outages. Why should
you schedule regular LTC maintenance with MidStates Energy?

  1. Reliability: Regular maintenance ensures the load tap changer operates smoothly and reliably, minimizing the risk of unexpected failures.
  2. Efficiency: Proper maintenance keeps the load tap changer operating at peak efficiency, which can result in significant energy savings.
  3. Safety: Maintenance helps identify and address potential safety hazards, such as loose connections or damaged components, which can lead to accidents.
  4. Cost Savings: Regular maintenance can help prevent costly repairs or replacements and extend the lifespan of the load tap changer.
  5. Performance Optimization: Maintenance can help optimize the performance of the load tap changer, ensuring that it operates at its best and delivers consistent voltage regulation.

Surplus Electrical Supplies

Do you need load tap changers? We have a few models for sale. Some possible brands we have include:

  • GE
  • McGraw
  • Westinghouse
  • Allis-Chalmers
  • More….

Contact us directly at any of our five Minnesota, Missouri, or Florida locations when you need extra load
tap changers or other surplus electrical supplies. We may be able to save you money!

Why Choose MidStates Energy for LTC and Transformer Maintenance?

At MidStates Energy, going above and beyond is our standard. Our dedicated team is ready to tackle anything from urgent repairs to regular upkeep, ensuring every detail aligns with your goals. Doubtful about realizing your plans? Consult with us at MidStates Energy before jumping to conclusions. We blend our electrical expertise with relentless effort to ensure success in every project.

  • Expert Specialists
  • Safety First
  • On-Time and On-Budget
  • U.S.-Based Company
  • Quality Partnerships
  • Surplus Electrical Supplies

Contact MidStates Energy, LLC, today about load tap changer maintenance and inspections or surplus electrical components for your transformers.

Low voltage and switchgear breaker services in Jefferson City, Missouri


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