China High-Voltage Electrical Components Factory Price List

Contact Ceho and buy our high-voltage electrical components, which are not ordinary components, but the cornerstone of the power infrastructure. Choosing the right components for safety, service life and continuity of operation, while quality is also a very core element, we will provide you with a one-stop solution.

Rated Voltage VS Withstand Voltage, What Is the Difference?

For high-voltage electrical components, the rated voltage is the maximum system voltage they can withstand under normal operating conditions and is related to the continuous operating limit of the component. The withstand voltage is a higher test voltage applied to the insulator, the duration is relatively short, and the insulator needs to be able to withstand it without breakdown, so as to maintain stability under transient and surge voltages.

Key Selection Criteria

System Voltage: The maximum system voltage for which the component is designed.

Dielectric strength: verify withstand voltage of power frequency (50/60Hz) and lightning impulse (1.2/50 μs).

Rated current: continuous current-carrying capacity, ambient temperature and potential overload must be considered.

Short-circuit performance: withstand thermal stress and mechanical stress generated by maximum fault current within specified duration.

Environmental conditions: For outdoor components, consider pollution level (IEC 60815), altitude, ambient temperature range, seismic activity and UV exposure.

Partial discharge: bushing and terminals and other key components, low partial discharge level is a key indicator of long-term insulation integrity.

Material and durability: porcelain, composite polymer, with different advantages.