Capacitance Graded Bushings

What are Capacitance Graded Bushings?

Capacitance graded bushings are a type of bushing used in electrical power systems to pass high voltage conductors through an insulating barrier (or through grounded barriers). They are designed to optimize the transition of the electrical field between the conductor and the surrounding metal enclosure, which helps to minimize the risk of electrical breakdown and improve the overall reliability of the system.

Capacitance graded bushings are commonly used in high voltage power systems, such as transformer or switchgear installations, where the conductors must be routed through walls or barriers to connect to the equipment. Extensive testing and simulations are conducted to validate the performance of a capacitance graded bushing under various conditions, including routine tests, type tests, and special tests as per relevant industry standards including, CSA, IEC, and IEEE. This ensures the bushing meets the requirements for insulation levels, temperature rise, and other performance parameters.

Capacitance Graded Bushing Manufacturer

Polycast manufactures high-quality capacitance graded bushings for demanding high-voltage applications, providing both standard and custom-engineered solutions. These bushings are designed for optimal electric field control and long-term reliability in power systems. You can request a quote for any of the listed products using the provided options above.

We also specialize in retrofit solutions for older or non-Polycast capacitance graded bushings to ensure compatibility and reliable performance. Whether you're replacing legacy components or integrating new designs into your system, Polycast offers the technical expertise and support you need. Contact us to speak with our knowledgeable team and discuss your specific application requirements.