Pre-insulated Bushing Withstand Voltage Grade

Another phenomenon that must be understood about the pre insulated sleeve withstand voltage level is the breakdown voltage. The breakdown voltage refers to the voltage at which a dielectric breaks down an object under the action of a strong electric field. The pre insulated junction sleeve withstand voltage level must be higher than the actual voltage, or it is easy to cause a insulated joint sleeve breakdown phenomenon.
The internationally accepted withstand voltage level is formulated in accordance with the unified standards of the American Society of Mechanical Engineers (ASME); therefore, in general, if a pre-insulated casing with a withstand voltage level greater than the actual voltage environment is selected, there will generally be no quality problems during use.