MNS Draw-out Distribution Cabinet

The MNS Draw-out Distribution Cabinet is a high-end low-voltage pull-out switchgear that has been comprehensively improved and developed based on domestic excellent low-voltage switch cabinets. It is also the current top-level low-voltage complete distribution equipment in China. Compared with ordinary pull-out switch cabinets, this product adopts 1/4 modular miniature drawer units, which have a smaller volume than GCS drawers and can accommodate more units. The protection level reaches IP54. Its core positioning is to meet the extremely high requirements for power distribution reliability and safety in high-end scenarios. Even in scenarios such as nuclear power plants and semiconductor factories where no faults are allowed, it can also perform perfectly. It is a necessary equipment for top-level power distribution scenarios and is suitable for various industrial and civilian scenarios with strict requirements for power distribution safety and stability.

Technical Specifications

What are the product advantages?

Micro drawer design, more circuits and more space-saving: The MNS Draw-out Distribution Cabinet uses 1/4 modular micro drawer units. A single cabinet can accommodate up to 36 independent small circuits, which is twice the number of circuits compared to ordinary GCS cabinets. Without expanding the distribution room area, it can meet the high-end distribution requirements for multiple circuits and low loads, significantly saving floor space and reducing the cost of the site.

IP54 ultra-high protection, suitable for complex environments: The protection level reaches IP54, far exceeding the IP30 level of ordinary pull-out switch cabinets. The fully sealed structure combined with precise sealing design can effectively prevent dust and moisture from invading. Even in a high-humidity and high-dust complex environment, it can ensure the stable operation of internal components and avoid equipment failures caused by environmental factors.

Dual interlock design, ultimate safety and anti-misoperation: Equipped with mechanical interlock + electrical interlock dual protection, it can completely prevent misoperations such as pulling the drawer while carrying a load or accidentally touching live parts. It not only ensures the personal safety of operators but also avoids power outages and equipment failures caused by misoperations. It builds a comprehensive distribution safety defense line and complies with the safety standards of high-end scenarios.

Power-off maintenance without power outage: Each drawer unit is independently designed. When a certain circuit fails, only the corresponding drawer needs to be pulled out for maintenance, and other circuits will not be affected. There is no need to stop the entire distribution system, perfectly adapting to those high-end scenarios that cannot tolerate any power outage for a second, ensuring continuous and stable production and operation, and reducing downtime losses.

Advanced craftsmanship and details, stable operation with large current: Built-in large-sized thick copper busbars, with high current capacity and adequate insulation protection, can adapt to large current operations ranging from 630A to 6300A. The temperature rise is low, and the stability is strong. Combined with details such as full sealing protection and dual interlock, it ensures the long-term stable operation of the equipment without frequent maintenance.

What are the application scenarios?

With its extremely high reliability, safety and adaptability, the MNS Draw-out Distribution Cabinet is widely used in various high-end scenarios that have strict requirements for power distribution and cannot tolerate any failures. It has become the standard equipment for core power distribution in various industries. In the nuclear power support scenarios, it is adapted to the low-voltage power distribution of nuclear power plants, meeting the requirements for ultra-high reliability and ensuring the stable operation of the nuclear power system; in the top-level data center scenarios, it is adapted to super-large IDC data centers, enabling uninterrupted maintenance without power outages and avoiding major losses caused by power outages; in the hospital scenarios, it is adapted to the core power distribution of tertiary hospitals' operating rooms and ICUs, ensuring the continuous operation of medical equipment and safeguarding the safety of patients' lives; in the semiconductor factory scenarios, it is adapted to the power distribution of semiconductor and chip factories, meeting the extremely high requirements for reliability and stability, avoiding production disruptions caused by faults; in the rail transit scenarios, it is adapted to the core low-voltage power distribution of subways and high-speed railways, achieving zero power outages and ensuring smooth transportation.

Why choose us?

Junray Electrical, as a professional Manufacturer, Supplier and Factory in China, has conducted in-depth research on the development and production of MNS Draw-out Distribution Cabinets. It strictly follows industry standards, and each device undergoes rigorous testing, ensuring quality and enabling smooth acceptance in various high-end scenarios. This product is an upgraded version based on ordinary switch cabinets, integrating core advantages such as 1/4 modular micro drawers and IP54 protection, effectively addressing the distribution pain points in high-end scenarios. It is more adaptable and durable than similar products. We provide comprehensive pre-sale selection guidance and after-sales maintenance services. We can customize the number of drawer units according to customer needs, meeting the personalized requirements of different scenarios.

Project Overview

This project involves the power distribution system upgrade for an intelligent production workshop dedicated to new energy power batteries—a facility classified as a high-end precision manufacturing site with "Class I" load requirements. The workshop houses a vast array of high-precision equipment—including systems for robotic welding, coating, winding, formation, and inspection—characterized by high load density, frequent start-stop cycles, and significant electromagnetic interference (EMI). Consequently, the facility demands exceptional continuity of power supply and high power quality.

The original legacy GGD fixed-type cabinets suffered from limited circuit capacity, a large footprint, a lack of isolation protection, and poor interference immunity. These issues frequently led to cascading short-circuit failures, extensive power outages during maintenance, and equipment shutdowns caused by EMI. The upgrade involved replacing the entire facility's MCC (Motor Control Center), power feeder, and process automation distribution systems with MNS modular low-voltage withdrawable switchgear, thereby achieving high-density, highly safe, and intelligent power distribution.

Issues Prior to Upgrade

Low space utilization: Traditional cabinet structures were bulky and offered limited circuit capacity, leaving no room to expand for new workshop equipment.

High risk of fault propagation: A lack of strict modular isolation meant that a short-circuit or arc in a single circuit could easily spread, causing a total power outage for the entire section.

Poor interference immunity: Precision industrial control equipment was susceptible to harmonics and EMI, resulting in frequent data drift and robotic system shutdowns or error alerts.

Inefficient maintenance: Faults in fixed-type cabinets required shutting down the entire line and opening the cabinet for repairs, severely impacting production line throughput.

Inadequate protection rating: Given the high dust levels and dense equipment layout in the workshop, standard cabinets were prone to dust accumulation, tracking/arcing, and overheating at connection points.

Equipment Configuration Plan

To meet the requirements for high-density loads, high EMC immunity, and rapid maintenance inherent in precision manufacturing, the low-voltage distribution room has been standardized with the new generation of MNS modular withdrawable switchgear. These units serve as the core cabinet type for workshop MCC motor control, automation equipment power feeding, UPS downstream distribution, and centralized control of lighting and general power systems. Core Equipment Specifications

Cabinet Type: MNS low-voltage modular withdrawable switchgear (international standard modular structure)

Rated Voltage: 400V; Rated Insulation Voltage: 690V

Structural Features: Modular units, high-density layout, and strict separation of functional zones

Drawer Positions: Four positions—Connected, Test, Isolated, and Withdrawn—featuring dual mechanical and electrical interlocking

Interference Immunity: EMC Class A (industrial grade); effectively shields against high-frequency harmonics and electromagnetic radiation interference

Protection Rating: IP40; dust-proof and foreign-object resistant; suitable for clean, precision workshop environments

Key Advantages: Increases circuit density by 30% compared to standard cabinets of the same size; supports hot-swapping for rapid unit replacement

Installation and Application Highlights

Ultra-high-density modular design: Uses standard modular units to maximize circuit deployment within limited power distribution room space, perfectly solving challenges related to high equipment density, numerous circuits, and spatial constraints.

Industrial-grade EMI immunity: Metal shielding structure combined with independent unit isolation effectively resists high-frequency interference from robots and variable-frequency drives, ensuring stable operation of precision equipment.

Fail-safe interlocking: Drawers cannot be withdrawn without first opening the circuit, and cannot be closed unless fully seated; completely eliminates accidents caused by on-load insertion/withdrawal or operational errors.

Zero fault propagation: Each drawer features an independent isolation compartment, containing single-circuit faults within the unit and preventing impact on the busbar or other equipment.

Highly flexible capacity expansion: Standardized modules allow for direct replacement of drawer units during future process upgrades or equipment additions, eliminating the need for cabinet modifications or extensive construction work.

Post-Retrofit Operational Results

Significantly improved power stability: EMC-resistant design eliminates downtime caused by electromagnetic interference affecting precision equipment, leading to a marked increase in overall production line efficiency.

Controllable fault risk: Independent unit isolation confines short-circuit and overload faults to the specific drawer, preventing large-scale power outages.

Rapid emergency repair: Faulty drawers can be directly swapped out; repair time is reduced from hours to under 5 minutes, drastically cutting losses from production downtime.

Maximized space utilization: Increased circuit density within the same cabinet footprint eliminates the need for additional power distribution rooms, saving on civil engineering costs. No heat generation during long-term operation: The modular plug-in design ensures stable contact performance, eliminating risks associated with loose connections or oxidation-induced heating, and maintaining normal operating temperatures.

Case Summary

The MNS drawer-type switchgear is a high-end, low-voltage cabinet characterized by its modularity, high density, superior interference resistance, and high safety rating. Compared to GCK and GGD models, it is better suited for high-standard applications such as precision manufacturing, new energy, rail transit, data centers, and high-end industrial facilities. Thanks to its compact modular structure, industrial-grade EMC interference resistance, rigorous isolation and protection, and ease of rapid maintenance, it has become the preferred choice for MCC power distribution systems in modern smart factories.

FAQ

Q: Can non-power-off maintenance be achieved?

A: Yes, each drawer unit is independently designed. When a certain circuit fails, only the corresponding drawer needs to be pulled out for maintenance, while the other circuits continue to operate normally. There is no need to stop the entire power distribution system, truly achieving zero power outage time. It is suitable for scenarios where power cannot be interrupted for even one second.

Q: Can the number of drawer units be customized?

A: Yes, the drawer units of this product are of 1/4 module size. The standard single cabinet can have a maximum of 36 units. The number of units can be customized according to the customer's circuit requirements, precisely matching the power distribution needs of different scenarios and adapting to high-end scenarios with multiple circuits and small loads.

Q: Can the MNS Draw-out Distribution Cabinet be used in high-current scenarios?

A: Yes, the rated current range is 630A to 6300A. It is equipped with large-sized thickened copper busbars, which have a large current-carrying capacity, low temperature rise, complete insulation protection, and can stably adapt to various high-current high-end power distribution scenarios, ensuring the long-term stable operation of the equipment.