MNS Low Voltage Withdrawable Switchgear

TOONICE’s MNS low-voltage withdrawable switchgear is a modular and intelligent low-voltage power distribution equipment, designed specifically for power distribution, motor control, and complex industrial environments. Its core feature lies in the adoption of a standardized drawer-type structure, which supports the quick replacement of functional units and significantly enhances system flexibility and maintenance efficiency.

I. Core technical features and structural design

1. Modular Framework and Drawer Units:

The cabinet frame is assembled from C – shaped steel with a 25mm modulus, featuring high precision and strong rigidity. Drawer units support flexible combination from 1/4 unit to 4 units (1 unit = 200mm in height), and a single cabinet can accommodate up to 72 drawers, increasing the capacity by more than 30% compared with traditional cabinets. The drawers are equipped with a four – position mechanical interlock for “connection, test, separation, and removal”, allowing safe replacement in the live state, and the maintenance time is shortened to within 5 minutes.

2. Triple Isolation and High Protection Class:

The interior is divided into three independent compartments: horizontal busbar compartment, drawer compartment, and cable compartment, which are completely separated by galvanized steel plates or flame – retardant plastic plates to effectively suppress arc propagation. The standard protection class is IP40, and it can be upgraded to IP54 (dustproof and waterproof) for special environments, suitable for complex working conditions such as petrochemical and shipbuilding industries. The busbar system adopts double – layer ESLOK coated screw connections. The rated current of the main busbar can reach 6300A, the short – time withstand current is 100kA (for 1 second), and the maintenance – free operation period can be as long as 20 years..

3. Flexible Incoming and Outgoing Line Solutions

It supports various wiring methods such as top – in top – out, bottom – in bottom – out, and side – in side – out, with high space utilization in the cable compartment. For example, in data center scenarios, back – to – back installation (with a cabinet depth of 1000mm) can be adopted, and the power distribution density can be increased by 40% through busbar prefabrication technology.

II. Intelligent and Digital Upgrades

1. Real – time Monitoring and Remote Control:

Built – in intelligent meters and sensors can collect data like current, voltage, power factor, and contact temperature rise in real time, and upload them to the SCADA system or cloud platform via protocols such as Modbus, Profibus, and Ethernet. Operation and maintenance personnel can remotely control the opening and closing of circuit breakers via mobile apps or PC terminals, check the equipment health status, and shorten the fault response time to milliseconds.

2. Predictive Maintenance and Energy Efficiency Optimization:

By analyzing historical data based on AI algorithms, potential risks such as contact wear and insulation aging can be warned in advance. For example, the MNS Digital switchgear monitors the temperature rise of busbar joints in real time through wireless temperature modules (accuracy ±1°C), predicts equipment life in combination with load curves, and reduces sudden failures. Meanwhile, it integrates power quality analysis functions, which can identify harmonic pollution and automatically adjust reactive power compensation, reducing line losses by 15% – 20%.

3. Arc Flash Protection and Safety Redundancy

Equipped with an optical fiber sensor array, it can detect arc faults within 5ms and trigger rapid opening to restrict arc energy within the fault compartment. Some models support dual – bus systems (main bus + standby bus) and achieve 99.999% power supply availability through automatic switching, meeting the needs of key scenarios such as data centers and hospitals.

III. Application Scenarios

1.Industrial Field:

① Petrochemical: In the explosion – proof environment of Zone II in refining units, a design of stainless steel cabinets + positive pressure ventilation is adopted, paired with explosion – proof contactors. With ATEX certification, it realizes frequency conversion control of methanol pump groups.

② Power Generation: In a certain 2×1000MW ultra – supercritical unit project, MNS cabinets interface with the DCS system via the Modbus protocol to monitor the status of feedwater pumps, fans and other equipment in real time, ensuring stable unit operation.

2.Infrastructure:

① Rail Transit: The low – voltage power distribution system in subway stations uses MNS double – sided operation cabinets, which support hot – swap maintenance to ensure reliable power supply during peak hours.

② Marine and Offshore Engineering: For example, the “Haiyang Shiyou 981” drilling platform is equipped with MNS3.0 switchgear, which has obtained ship – class certification (DNV GL) and can withstand marine salt spray corrosion and severe vibration.

3.Commercial and Data Centers:

① Financial Center: A Tier IV data center in Shanghai uses MNS cabinets to achieve high – density power distribution. A single cabinet supports 40 1/4 – unit drawers, meeting the high – power demands of server clusters.

② Intelligent Buildings: By integrating the BAS system, automatic control and energy optimization of equipment such as lighting, air conditioning, and elevators are realized, with an energy saving rate of up to 25%.