MVnex Series
| Rated voltage (Un/Ue) | 12 kV |
| Rated current (In) | 4000 A |
| Rated short-circuit breaking current | 40 kA |
| Rated short-term withstand current | 40 kA / 4 s |
| Degree of protection | IP4X (door closed) / IP2X (circuit breaker room door open/compartment room) |
| Rated peak withstand current | 100 kA (peak) |
| Rated short-circuit closing current (peak) | 100 kA |
| Rated lightning shock withstand voltage (peak) | 75 kV (relative ground/phase) / 85 kV (break) |
| Rated short-time power frequency withstand voltage | 42 kV (relative ground/phase) / 48 kV (break) |
| Rated operating sequence | O-0.3s-CO-180s-CO |
| Mechanical life (removable parts / ground switch) | 1000 times / 1000 times |
| Rated frequency | 50 Hz |
| Circuit breaker loop resistance | ≤ 40 μΩ |
| Main loop resistance | ≤ 65 μΩ |
| Temperature rise test current | 1.1 × rated current |
| Auxiliary / control circuit withstand voltage | 2000 V / 1 min |
| Closing coil operating voltage | DC 242 / 220 / 187 V |
| Opening coil operating voltage | DC 242 / 220 / 143 V |
| Applicable standard | IEC 61439-1 / IEC 61439-2 (equivalent to GB/T 7251.2-2023) |
Product Overview:
MVnex armored removable AC high-voltage metal-enclosed switchgear (4000 A / 40 kA) is designed to meet the requirements of modern large-scale power systems and intelligent substations, where high reliability, large capacity, and advanced power distribution control are essential.
The MVnex series adopts a modular, removable armored structure, integrating a high-breaking-capacity vacuum circuit breaker, intelligent protection devices, condition monitoring functions, and communication interfaces. This design provides a compact, reliable, and intelligent high-voltage power control solution.
With excellent electrical performance, mechanical reliability, and intelligent operation and maintenance capabilities, the MVnex switchgear supports remote monitoring, automated operation, and fault diagnosis. It can be seamlessly integrated into smart grids, digital substations, and industrial power systems, delivering safe, efficient, and scalable power distribution solutions.
Standards Compliance
The MVnex series armored removable AC metal-enclosed switchgear is designed, manufactured, and tested in accordance with GB/T 7251.2-2023, which is technically aligned with the IEC 62271 series for high-voltage switchgear and controlgear.
Product Features:
- The rated current is 4000A, the rated short-circuit breaking current is 40kA, and the closing current is 100kA (peak), which is suitable for heavy-duty power distribution occasions.
- Integrate intelligent control and condition monitoring functions, support remote communication and programmatic operation, and adapt to the needs of intelligent power grid management.
- Armored removable modular structure, independent compartment of each functional unit, protection level up to IP4X, with good insulation and safety protection performance.
- Through a full set of type tests including power frequency, lightning impact, temperature rise, short-term resistance, closing and closing and breaking, mechanical life, etc., the performance is reliable.
- Equipped with a spring energy storage operation mechanism, it supports electric opening and closing, and has a long mechanical life (up to 10,000 times for removing parts/grounding switches).
- It supports a variety of configuration schemes, and can flexibly select accessories such as transformers and fans according to system requirements to adapt to different application scenarios.
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