Overvoltage and Short Circuit Protection: Self-Healing Insulator
All insulator structures used in the DMS power capacitors are in self-healing type: During the voltage breakdown, the metal layer around the breakdown channel is molten by the high temperature of arc formed between the voltage breakdowns. They can move in a few microseconds, and be pushed away by the pressure generated at the center of the breakdown point. An isolation region is formed to provide reliable resistance and voltage protection for all the operational requirements of the capacitor. The capacitor still has complete functionality during breakdown and after breakdown.
Within the permitted testing and operating voltage, the capacitor has the functions of short circuit and overvoltage protection. They can also withstand external short-circuit current, as long as the resulting impact discharge does not exceed the specified limits of inrush current.

When overvoltage or overheating or aging occurs during the late stage of the service life of the capacitor, the increased number of self-healing breakdown may cause the capacitor voltage rises. To prevent explosion, the capacitor is equipped with a forced Breakage Acting Mechanism (BAM). The security mechanism is based on the attenuation points on one piece, two or all connected lines inside the capacitor. With the pressure rising, the housing begins to expand, mainly by opening the folded portion and pushing up of the end cap. As a result, the connection line is separated at the cable attenuation point, and the current path is irreversibly interrupted.

Our MKPg capacitor is based on a low-loss insulator made of pure polypropylene film. A self-healing mixture of zinc and aluminum is metallized directly on the side of the PP film under vacuum state. Our long experience in this technology and continued research and improvement ensure excellent self-healing properties and long service life of the insulator.
On most modern automated equipment, plastic film is wound into a stable cylindrical coil. The ends of the capacitor coils are sprayed with the metal contact layer to facilitate transfer of high current load and ensure low inductance connection between the terminals and the coil.
When subjected to high surge or rms current, the connection between the PP film and zinc contact layer will have very high stress, so it is necessary to consider the life and reliability of the capacitor. For the type selected, we adopt a wavy way to cut the film to increase the contact surface between the zinc layer and the film, which can reduce this strain.
MKPg Leak-Proof and Environmental Friendliness
The gas in the MPKg capacitors are inert and completely harmless to the environment. When treating the capacitor, the treatment of these liquids or toxic gases is not taken into account. If the capacitor is correctly handled and operated, the occurrence of gas leakage is highly unlikely. These capacitors can be installed in any desired position. However, when a leak occurs, the gas will leak into the atmosphere surrounding the device to cause adverse consequences, such as corruption, pollution or contamination. In the long run, such an impossible event will cause capacitance degradation; however, this process will elapse over long time during normal operation of capacitor.
By using gas, we are reducing the weight of the capacitor. Compared with resin or oil-filled capacitor, the average weight is 15%-20% less. This makes transportation and handling of unit easier. It also supports installation in almost any place.

Our capacitors do not contain PCB, solvent or any other toxic or banned materials. They do not contain hazardous substances and comply with the requirements in the ChemischeVerbotsverordnung (based on EU Directive 2003/53/EG and 76/79/EWG) ... Gefahrstoffverordnung "(GetStoff and ... Bedarfsgegenstaendeverordnung (BedGgstV)".