Low Voltage Switchgear & Distribution Panels
The MNS low-voltage switchgear is a modular and versatile low-voltage power distribution solution, with a rated operational voltage up to 660V and a rated current range from 400A to 6300A. Designed for demanding industrial and commercial environments worldwide, it provides high-reliability power distribution, motor control, and energy management. It is widely used in power generation, infrastructure, and various industries. Its design complies with international standards such as IEC 61439 and carries multiple global certifications.
Detailed Technical Specifications
Parameter Category | Technical Specifications |
Rated Characteristics | Rated Operational Voltage (Ue): 400V, 690V |
Short-circuit Performance | Rated Short-time Withstand Current (Icw): Horizontal busbar up to 100kA/1s, Vertical busbar up to 80kA |
Protection Degree (IP) | IP30, IP31, IP40, IP41, IP42, IP54, IP55 (Customizable according to requirements) |
Construction Forms | Withdrawable, Fixed, Plug-in, Can be mixed within the same assembly |
Busbar System | Horizontal Busbar: ≤6300A |
Enclosure Dimensions | Height: 2200mm (Standard) |
Separation Forms | Compliant with IEC 61439, supporting Form 1, 2b, 3b, 4b, etc. |
Compliance Standards | IEC 61439-1/-2, GB/T 7251.1, UL 508A (Optional) |
Key Product Features
1.Flexible Modular Design
C-profile assembled frame offers high structural strength. All structural members are zinc-plated or made of aluminum-zinc coated steel plate for corrosion resistance.
Modular design (E=25mm). Component and compartment sizes vary according to the modulus, allowing flexible configuration, easy expansion, and modification.
Withdrawable units have Connect, Test, Disconnect, and Withdrawn positions with mechanical interlocking, ensuring operational safety and reliability.
Compact structure, with up to 36 circuits per cabinet, maximizing space utilization.
2.Exceptional Safety and Reliability
Passed multiple stringent tests, including seismic resistance (seismic intensity level 9), internal arc testing (100kA/0.5s), salt spray test (96 hours), and high-altitude test (4000 meters), adapting to various harsh environments.
Completely separated by steel plates or high-strength flame-retardant plastic functional boards between compartments, effectively preventing fault arc propagation and ensuring safety for equipment and personnel.
3.Provides high protection degree (IP54)
against dust and water, suitable for complex environments.
4.Smart Digital Integration (Optional)
Can integrate temperature sensors for monitoring critical connections and smart electrical devices for current and voltage monitoring.
Supports multiple communication protocols (e.g., Modbus RTU/TCP, Profibus DP, Profinet, IEC 61850) for easy integration into plant monitoring and control systems.
Enables predictive maintenance and energy efficiency management through cloud platforms, reducing unplanned downtime and optimizing operational costs.
5.Global Applicability and High Adaptability
Complies with multiple international standards such as IEC, GB, UL, AS, meeting global market access requirements.
Offers various cable entry/exit options (top-top, top-bottom, bottom-top, bottom-bottom), adapting to different on-site wiring needs.
Wide operating temperature range (-25℃ to +55℃, up to +70℃ for short periods). Built-in temperature control devices ensure stable operation at high altitudes or in extreme climates.
6.Quality Manufacturing and Easy Maintenance
Enclosure finished with epoxy resin powder electrostatic spraying (Standard color RAL7035), providing corrosion and impact resistance.
Functional units are easy to replace and maintain. High interchangeability of drawers significantly reduces downtime for maintenance.
Front operation and maintenance, allowing rear-to-wall installation and saving space.
Typical Applications
Energy & Power: Power plants, substations, renewable energy (PV, wind farms) grid integration.
Industrial Manufacturing: Petrochemical, metallurgy, mining, papermaking, automotive manufacturing for power distribution and Motor Control Centers (MCC).
Infrastructure: Airports, rail transportation, ports, water treatment plants, data centers, hospitals.
Commercial Buildings: High-rise buildings, shopping malls, hotels for power and lighting distribution.
Quality and Service Assurance
MNS low-voltage switchgear adheres to strict quality management systems. Each unit undergoes rigorous testing and verification to ensure compliance with international safety and performance standards. We provide global warranty, technical training, rapid spare parts response, and full lifecycle service support to facilitate the smooth operation of our customers' global projects.
Q1. What are the core advantages of the MNS withdrawable switchgear?
A: The MNS system is a fully modular, scaleable design. Its primary advantages include high operational safety, space-saving compact dimensions, and excellent heat dissipation. The "Withdrawable" feature allows for rapid replacement of functional units without powering down the entire board, significantly reducing downtime.
Q2. What is the maximum current rating for the MNS busbar system?
A: Our MNS switchgear is designed for heavy-duty industrial applications. It supports a rated main busbar current up to 6300A and a rated short-time withstand current (Icw) of 50kA, 80kA, or 100kA (1s), depending on your project requirements and IEC 61439 compliance.
Q3. How does the MNS system ensure operator safety during maintenance?
A: Safety is built into the mechanical design. Each drawer unit features a multi-stage interlocking mechanism with three distinct positions: Connected, Test, and Disconnected. The unit cannot be withdrawn while the circuit breaker is "ON," and the IP20 protection is maintained even when a drawer is removed.
Q4. What is the modulus of the MNS cabinet for component layout?
A: The MNS system uses a standard 25mm modulus (E=25mm). This allows for highly flexible configurations, enabling us to install up to 36 mini-drawers (1/4 unit) or a combination of 1/2, 1, 2, and 3-unit drawers in a single vertical section.
Q5. Can the MNS panel be configured for front or rear maintenance?
A: Yes. Our Shanxi factory offers both front-access and rear-access configurations. Front-access is ideal for space-constrained environments (back-to-wall installation), while rear-access provides more room for cable termination in high-power applications.
Q6. What materials are used for the MNS frame and busbars?
A: The frame is constructed from C-shaped steel profiles with a 25mm hole pattern, protected by Alu-Zinc coating for superior corrosion resistance. We use high-purity T2 copper busbars, which can be tin-plated or silver-plated at the contact points to ensure low contact resistance and long-term stability.
Q7. Does the MNS system support "Intelligent" power management?
A: Absolutely. We can integrate Intelligent Motor Controllers (IMCs) and smart breakers that support Modbus-RTU, Profibus-DP, or Ethernet/IP protocols. This enables real-time monitoring of energy data, harmonics, and predictive maintenance via your SCADA system.
Q8. What is the standard Ingress Protection (IP) rating for MNS?
A: The standard protection rating for our MNS panels is IP30, IP40, or IP41. For harsh industrial environments, we can customize the enclosure up to IP54 by using specialized gaskets and reinforced ventilation structures.
Q9. Are the drawer units interchangeable between different cabinets?
A: Yes. Thanks to our high-precision CNC manufacturing in Taiyuan, all drawer units of the same size are 100% interchangeable. This standardization simplifies spare parts management and allows for easy future expansion of your distribution system.
Q10. What testing standards do your MNS sets comply with?
A: Our MNS switchgear sets are manufactured and tested in accordance with IEC 61439-1/2 and GB/T 7251.12. Before shipping, every unit undergoes a comprehensive Factory Acceptance Test (FAT), including mechanical operation, insulation resistance, and secondary circuit logic verification.
