High Voltage ACB

High voltage ACB, also called intelligent universal frame circuit breaker, is specially developed for AC 50Hz power distribution systems. Its rated operational voltage ranges from 800V to 1140V, with a rated working current up to 7500A.

As a core power distribution device, this high voltage air circuit breaker is mainly applied in electric energy distribution. It effectively safeguards power cables and electrical facilities against common electrical faults such as overload, undervoltage, short circuit and earth fault. Equipped with multi-type curve protection controllers, it delivers full-range protective performance, perfectly matching power distribution systems that demand high power supply stability and fewer accidental power cuts.

Fitted with 3H intelligent control unit and standard communication port, the breaker can be connected to on-site field buses. It supports four core remote functions: telemetry, parameter remote setting, remote operation and remote information feedback, fully meeting the automatic control needs of modern power systems.

Combined with leakage transformer and matched intelligent controller, it realizes reliable leakage protection. Meanwhile, it can conduct motor fault protection for 50Hz AC 400V power grids and adapt to infrequent motor startup under regular operating conditions.

Strong Point

• High voltage ACB with full electrical protection
• 800V~1140V, 7500A high current capacity
• 3H intelligent controller, remote controllable
• CQC certified, leakage & motor protection

Usage environment:

Our high voltage ACB is designed to operate reliably in ambient air temperatures from -5°C to +40°C, with dedicated temperature derating factors available for use up to +60°C. It is intended for installation at altitudes no higher than 2000m (with high-altitude derating guidance for use above 2000m), with a maximum vertical tilt of 5°. At the installation site, the relative humidity should not exceed 50% at +40°C (and up to 90% at 20°C), with precautions taken against surface condensation caused by temperature changes.

Rated for Pollution Level III, its main circuit, undervoltage release coil and power transformer primary coil meet Installation Category IV, while auxiliary and control circuits meet Category II. The breaker is suitable for standard electromagnetic environments and must be installed in non-explosive, non-corrosive areas free from conductive dust, inside an IP54-rated cabinet for full protection.

When you select our high voltage ACB, you're investing in a robust, reliable circuit breaker engineered to meet the strictest demands of industrial power distribution. Built for use in a wide range of operating environments-from temperatures as low as -5°C up to +40°C (with derating options for up to +60°C), altitudes up to 2000m, and humidity levels as high as 90% at 20°C-our ACB delivers stable performance even in challenging conditions. With Pollution Level III rating, IP54 protection when installed in a suitable cabinet, and compliance with Installation Category IV standards for critical circuits, it offers comprehensive safeguards against electrical faults, corrosion, and environmental damage. Backed by CQC certification, our high voltage air circuit breaker ensures consistent power supply reliability, reduces downtime risks, and supports seamless integration with smart control systems, making it the ideal choice for your high-performance power distribution needs.