The main component is the capacitor, the capacitor is the key. According to the requirements of capacity, a certain number of elements will be combined with a wire through insulation treatment, the installation of explosive device, placed in a shell, and then after some processing technology to become a single capacitor.
Capacitor should be discharged device, when disconnected from the power supply after the capacitor, it can in the time remaining within the capacitor voltage drops to zero, in order to ensure the safety of maintenance personnel and to prevent duplication caused by switching the capacitor when the voltage is superimposed over voltage.
Self-healing low voltage shunt power capacitor despite the self-healing features, more secure and reliable, but there are still healing failures, resulting in reduced insulation level components, or even shorted, resulting in bulging, bursting of individual cases. To address this phenomenon, different manufacturers use different proof measures.
1. Pressure explosion-proof equipment
When the capacitor insulation level of a particular component falls, inevitably produce exceptional heat, increased pressure within the capacitor casing deformation, expansion, mechanical displacement of the proof sheet (line) pulled off. As the power through the phase explosion-proof film and capacitor components, explosion fragments torn open is equal to the power, explosion proof sheet effect depends on the design, installation location and sealing capacitors and so on.
2. Safety Film
The metal film deposited into a network structure, that is, the capacity of the capacitor element is divided into a considerable number of small capacitors in parallel. Deposited into each small capacitor with a current insurance structure, a small capacitance of the capacitor component of the healing power failure at the weak, the small capacitive current fuse, the introduction of running down the entire device capacity is minimal.
3. Temperature Current Insurance
Capacitor consists of a combination of multiple capacitor elements, each element if the set temperature current insurance device, when a component fails due Insulation of self-healing, or even shorted, it will generate heat current, temperature, current insurance led to action, the component out of operation immediately, while the entire capacitor can continue normal operation, only a small amount of capacity declined only.
Explosion prevention measures are necessary, the most important component is to improve the reliability of the capacitor. Manufacturers generally attach great importance to the choice of materials and process conditions of control. Lack of good raw materials and strict process control, the production of finished capacitors not good.

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