How to choose high voltage connectors?

Design engineers pay more attention to appearance, assembly and function when selecting components for their products. This means that selecting the right high-voltage connector for the task prevents insulator damage and makes the environmental impact inside the connector less likely. Function Drives High Voltage Connector Selection In order to select a high voltage connector, it is clear that the operator needs to be protected from electrical shock. High-voltage connectors are made of materials suitable for use and environment, and high-voltage connectors are durable and do not cause fires. When selecting high voltage connectors, the issue of the risk of corona and arc discharge is more important.

Corona and Arcing Corona can cause arcing, which can lead to fires. Corona can also cause insulator breakdown. The key criteria for minimizing corona and arcing are the atmospheric/environmental conditions as well as the exterior construction and materials of the high voltage connector. Corona can cause power loss, thermal breakdown and possible electromagnetic/RF interference. Atmospheric conditions include temperature, pressure, particulates and humidity. The main considerations in the construction of high voltage connectors are the spacing between conductors and the effect of other metal parts and sharp corners. Since corona has a greater effect on porous insulators than on non-porous insulators, high voltage connectors should also consider this factor. Atmospheric conditions, including the effects of temperature and humidity on the corona onset voltage of high-voltage connectors, indicate that lower pressures and higher temperatures produce corona at lower voltages, whereas relative humidity by itself does not have much effect on high-voltage connectors. However, even in arid climates, large changes in temperature can lead to the appearance of contaminated condensation. Since condensate reduces the initial voltage of corona discharge, it is necessary to prevent condensate from entering high-voltage connectors. Appearance shape and insulation degradation Considering that the distance between conductors will affect the initial voltage of the corona, the goal is to have a large distance between the conductor pins and other metal parts inside the high voltage connector. By understanding the response of the component to partial discharge activity, material selection, exterior shape and interface high voltage connectors can be optimized to improve durability and reliability. It is recommended to avoid sharp edges and try to use smooth rounded surfaces as the former will also reduce the starting voltage. Generally, non-porous insulators have better breakdown performance, but they are not always practical in tight spaces such as high voltage connectors. The use of insulating materials such as PEEK and silicone rubber in conjunction with high voltage connector design will maximize creepage distances and air gaps Selecting a high voltage connector requires not only consideration of corona, arcing, atmospheric influences, cosmetic shapes, and insulation degradation, but also other variables such as impulse voltages and surges. High voltage connector suppliers discuss these issues in detail to ensure that a high voltage connector is selected for a specific high voltage application. Time, effort and research are spent on all of these considerations so that their products meet the critical needs of their customers.

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