The service life of an electric power transformer is defined by four main factors:
- aging caused by heat;
- electrical insulation wear;
- mechanical wear; and
- component wear.
Heat aging is the process during which the cellulose insulation can become critically damaged and the mechanical performance of the insulating paper can become degraded to the point of failure. When discussing electric power transformers, the terms “transformer service life” and “cellulose insulation service life” are often interchangeable.
Electrical insulation wear is the process in which a critical reduction of the dielectric strength of the liquid insulation, caused by moisture and contamination by aging products, can occur.
Mechanical wear is the disruption and degradation of the core windings due to the cumulative effects of short circuit current, vibration, power surges and other harmful environmental conditions
Since most transformers in service today are relatively old (most were commissioned towards the end of the previous century), and buying new electrical equipment is very costly, maximizing your current equipment’s service life and capability is essential. Extension of the service life of your transformers is especially important for the power transformers used in nuclear power plants.
Dielectric insultaing oil, also known as transformer oil, performs the most important function of insulating the current-conducting parts of the transformer, and dissipating the heat from the core and the windings. The condition of the transformer’s insulating oil in many ways defines and determines the reliability of the transformer itself.
GlobeCore is one of the world’s leading manufacturers and supplier of transformer oil purification equipment. The GlobeCore process of oil purificaton and regeneration offers the capability to restore the performance of transformer oil to the specifications of the oil when it was new. The GlobeCore process will extend the service life of both the oil and the equipment making the process the most cost effective in the industry.
Processing transformer oil at nuclear power plants has its own specific requiements. Oil processing equipment is often required to be operated in what are known “explosion hazard” environments. Fires and explosions in nuclear power plants may be caused by neglecting the correct procedures, carelessness, and operator errors.
Nuclear power plants can be vulnerable to explosion and fire hazards due to the following factors:
- use of flammable oils in turbine systems, hydrogen in turbine colling systems;
- the use of diesel fuel and fuel oil for diesel power generation;
- short circuit of power cables;
- oil coming into contact with hot parts;
- use of flammable materials in electrical equipment; and
- human error during repairs and system checks.
In anticipating the risks posed in modern poer plants, GlobeCore now offers special explosion proof equipment designs for its most popular oil processing equipment. The explosion proof units feature multi-tier explosion protection that can guarantee safety and reliability while performing a high quality level of oil purification the modern nuclear power plant.