Schneider Electric HVX is a modular medium-voltage vacuum circuit breaker designed for mainstream air-insulated switchgear. The series covers 12 kV, 24 kV and 40.5 kV voltage classes, with listed short-circuit breaking capacities from 25 kA to 50 kA and rated currents from 630 A to 4000 A, plus a 5000 A option on the specified 12 kV model. Fixed and withdrawable versions are described in the supplied product content.
The Schneider Electric HVX Medium-Voltage Vacuum Circuit Breaker (VCB) is designed for indoor medium-voltage power distribution systems, providing reliable switching and short-circuit interruption for electrical networks up to 24 kV. With rated current options from 630 A to 4,000 A and short-circuit breaking capacities of 25 kA, 31.5 kA, 40 kA and 50 kA, the HVX series offers flexible configurations for different switchgear requirements. Featuring vacuum interruption technology, a robust operating mechanism and fixed or withdrawable installation options, the HVX series is suitable for utility substations, industrial facilities and medium-voltage distribution networks.
The HVX series uses vacuum interrupters to extinguish electrical arcs during circuit interruption. The vacuum switching technology provides effective insulation and arc interruption, supporting reliable operation under normal switching and short-circuit fault conditions. Its design helps reduce contact erosion and maintenance requirements while supporting repeated switching operations. The circuit breaker works with compatible protection relays and current transformers to provide coordinated fault detection and circuit interruption within medium-voltage distribution systems.
Designed for demanding medium-voltage applications, the HVX series features a robust operating mechanism and insulated pole structure. The vacuum interrupter is integrated into a protective pole assembly, providing mechanical support and electrical insulation. Mechanical and electrical interlocking arrangements help prevent incorrect switching operations and improve operational safety. Selected configurations also support remote operation and remote racking, allowing operators to control circuit breaker movements from a separate operating position.
The Schneider HVX series is available in fixed and withdrawable configurations to accommodate different medium-voltage switchgear designs. Withdrawable versions can be mounted on an isolating truck or compatible racking system, facilitating insertion, removal and maintenance. The series supports integration into Schneider Electric medium-voltage switchgear platforms and panel builder designs, with different connection arrangements and accessory options available according to the selected configuration.
The HVX Medium-Voltage Vacuum Circuit Breaker is suitable for switching and protection applications across a wide range of industrial and utility power systems. Typical applications include:
Power Distribution Substations: Circuit protection and switching for medium-voltage incoming and outgoing feeders.
Power Generation: Switching and protection in power plant auxiliary distribution systems.
Oil and Gas: Medium-voltage distribution for processing facilities and industrial electrical networks.
Mining and Metals: Protection of electrical distribution systems in mining and metal processing facilities.
Chemical Industry: Switching and protection for industrial power distribution networks.
Marine and Infrastructure: Medium-voltage switching applications in marine facilities and critical infrastructure.
| Item | Specification |
| Series | HVX medium-voltage vacuum circuit breaker |
| Voltage Classes | 12 kV / 24 kV / 40.5 kV |
| Rated Frequency | 50 / 60 Hz |
| Short-Circuit Breaking Capacity | 12 kV: 25–50 kA; 24 kV: 25–40 kA; 40.5 kV: 25–31.5 kA |
| Rated Current | 12 kV: 630–4000 A, with specified 5000 A option; 24 kV: 630–4000 A; 40.5 kV: 1250–3150 A |
| Insulation Level | 12 kV: 42 kV power-frequency / 75 kV impulse; 24 kV: 65 / 125 kV; 40.5 kV: 95 / 185 kV |
| Mounting | Fixed or withdrawable |
| Pole Spacing | 12 kV: 150 / 210 / 275 mm; 24 kV: by model; 40.5 kV: 275 / 300 / 440 mm by version |
| Operating Conditions | Ambient −25°C to +40°C; standard altitude 1000 m; higher altitude on request |
| Humidity | 24-hour average ≤95% RH; monthly average ≤90% RH |
| Standards | GB/T 1984, GB/T 11022, DL/T 402, DL/T 403, IEC 62271-100 and IEC 62271-1 |
| Typical Applications | Overhead lines, cables, motors, transformers, generators and capacitor banks |
| Model Family | Voltage | Breaking Capacity | Rated Current | Additional Reference |
| HVX12-25 | 12 kV | 25 kA | 630 / 1250 / 1600 / 2000 / 2500 / 3150 / 4000 A* | Peak 63 kA; 4 s short-time withstand 25 kA |
| HVX12-31 | 12 kV | 31.5 kA | 630 / 1250 / 1600 / 2000 / 2500 / 3150 / 4000 A* | Peak 80 kA; 4 s short-time withstand 31.5 kA |
| HVX12-40 | 12 kV | 40 kA | 1250 / 1600 / 2000 / 2500 / 3150 / 4000 A* | Peak 100 kA; 4 s short-time withstand 40 kA |
| HVX12-50 | 12 kV | 50 kA | 1250 / 1600 / 2000 / 2500 / 3150 / 4000 A* | Peak 125 kA; 4 s short-time withstand 50 kA |
| HVX12-50-50/K | 12 kV | 50 kA | 5000 A* | Only 5000 A model listed; peak 150 kA |
| HVX24-25 / -31 | 24 kV | 25 / 31.5 kA | 630–4000 A by version | Higher-current versions may require forced-air cooling |
| HVX24-40 | 24 kV | 40 kA | 1250–4000 A by version | Pole spacing 275 mm listed |
| HVX40-25 | 40.5 kV | 25 kA | 1250–3150 A | Insulation level 95 / 185 kV |
| HVX40-31 | 40.5 kV | 31.5 kA | 1250–3150 A | Pole spacing 275 / 300 / 440 mm by version |
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