Maintenance and Inspection
To keep the voltage constant
To guarantee the reliable operation of your power transformer, the on-load tap-changer (OLTC) must function properly. Every OLTC requires professional maintenance to ensure this. Put your trust in expertise from the market leader. With more than 6,000 tap-changer maintenance deployments every year, our specially trained and tested service technicians have unrivaled field experience. A comprehensive, unmatched network of 21 service locations worldwide also guarantees fast delivery of spare parts as well as 24/7 availability.
Your Advantages at a Glance
Regular OLTC service can extend the service life of your equipment
With our premium service, you receive maximum transformer availability and fault-free OLTC operation
With original spare parts, we bring your OLTC up to the latest state of the art
Typically, we are on site within 24 hours
We offer technical service for all types, brands and models of on-load tap-changers
You receive a 24-month warranty, up to the availability guarantee, on work that we carry out
Our OLTC service is in accordance with DIN EN ISO 9001 Quality Management, DIN EN ISO 14001 Environmental Management and ISO 55000
Our OILTAP® on-load tap-changer is characterized by its rugged design, versatile options for use and proven durability. Our oil on-load tap-changers have been in operation for many decades. Because of these long lifespans, the number of tap-change operations and time intervals representing critical maintenance criteria are being reached more and more frequently. Therefore, we offer various tools for the inspection and maintenance of OILTAP® on-load tap-changers.
The inspection and maintenance work can be combined perfectly with electrical measurements for the on-load tap-changer. For oil-filled on-load tap-changers, the vibro-acoustic measurement (VAM) and dynamic resistance measurement (DRM) are available.
Our VACUTAP® on-load tap-changers are used in multiple high-end applications, such as in strategically important transformers for energy transmission grids or in heavy industry. For such critical applications, reliability, availability and safe operation must be ensured at all times. Therefore, we offer various tools in our portfolio for condition assessment and maintenance. Our all-inclusive package includes various tests, such as a dynamic resistance measurement, vibro-acoustic measurement and other diagnostic measurements (e.g. oil analysis and electrical measurements).
We offer the all-inclusive package! In addition to OEM spare parts and oil handling, we also provide two qualified service experts and a crane.
1. Concentrate your resources on the core business
2. Reduce your overall expenses
3. Get the highest quality when outsourcing your service to MR
4. Can be combined with other services on the transformer
5. Pass on business risk to MR – 2-year warranty
6. Maintenance by truck, no matter the weather
We carry out maintenance on the following tap-changers: All types from Maschinenfabrik Reinhausen; Trafo Union/TUSA/AEG; Elin; Elprom/Hyundai Elprom; Westinghouse; General Electric/Canadian GE; Ferranti/Ferranti Packard; Siemens/Allis Chalmers; ABB/Asea/BBC/Waukesha SPX; Alstom; Mitsubishi, Toshiba; Fuji/Fuji-TU; Hitachi; Brush/ATL; McGraw Edison; Federal Pacific/Federal Pioneer; ZTR; Hawker Siddley; ACEC; other types of old tap-changers from former manufacturers
Inspection and maintenance work can be combined perfectly with electrical measurements for the on-load tap-changer. For the oil-filled on-load tap-changer, the vibro-acoustic measurements (VAM) and the dynamic resistance measurement (DRM) are available. For a vacuum on-load tap-changer, a combination of vibro-acoustic measurement (VAM), dynamic resistance measurement (DRM) and measurement of the vacuum tubes is offered.
As the operating duration of your transformers increases, by-products such as gas and moisture start to form in the oil. Increasing moisture in the oil leads to a reduction in oil quality.
Carrying out targeted oil treatments in the form of reconditioning or regeneration based on the conditions of use are therefore recommended to prevent operating problems and to extend the service life. We are also experts in smart drying of oil and cellulose in the transformers with the help of the molecular sieve.