Product Overview

The Customizable MNS Low Voltage Switchgear Withdrawable Power Distribution Cabinet Switchboard 400V 415V 690V MCC Panel is engineered for power plants, industrial facilities, data centers, and petrochemical installations where operational continuity and configuration flexibility are non-negotiable. Manufactured by JYDQ in Zhejiang, China, this withdrawable power distribution cabinet delivers main busbar capacity up to 5000A continuous, short-circuit withstand of 100 kA (standard) and 220 kA (enhanced) for 1 second, and a fully modular withdrawable architecture that allows individual functional units to be maintained or exchanged without de-energizing the main busbar system.

Main Busbar and Electrical Parameters

The main busbar system is rated for continuous current up to 5000A. Short-time withstand current (1 second) is 100 kA in the standard configuration and 220 kA in the enhanced configuration—among the highest LV busbar ratings available for any withdrawable switchboard. Peak withstand current is 105 kA (standard) and 176 kA (enhanced). The distribution busbar supplying individual withdrawable units carries up to 1600A per column, with unit ratings up to 1000A. Rated insulation voltage is 660V/1000V; rated operational voltage covers 380V and 660V, encompassing 400V, 415V, and 690V system applications.

The enhanced 220 kA short-circuit configuration is specifically relevant when the switchboard is installed directly on the LV secondary of a large distribution transformer (2500–3150 kVA) where available fault current can approach the interrupting capacity of modern LV power circuit breakers. At those fault energy levels, the distinction between standard and enhanced busbar ratings is not nominal—it determines whether the switchboard survives the event intact and without busbar deformation.

Withdrawable Architecture and Zero-Downtime Maintenance

The Customizable MNS Low Voltage Switchgear Withdrawable Power Distribution Cabinet Switchboard 400V 415V 690V MCC Panel uses a withdrawable cassette architecture where each functional unit—circuit breakers, motor starters, soft-starters, variable frequency drives, or metering modules—plugs into the vertical distribution busbar through self-aligning multi-finger contacts. Units withdraw to a disconnected position while the main busbar and all other units remain live, enabling safe equipment exchange without switchboard shutdown.

Three operating positions are available: service, test, and disconnected. Mechanical coding prevents insertion of an incorrectly rated unit into a higher-current position, and secondary control circuits connect through multi-pin plugs that engage automatically at the service position. For motor control center (MCC panel) applications in continuous-process plants, a faulty motor starter can be swapped in minutes while all remaining process equipment stays operational.

In projects where the switchboard interfaces with a busbar trunking system for downstream power distribution, the MNS cable compartment layout and connection points should be coordinated with the busbar trunking system supplier at specification stage to confirm dimensional and electrical compatibility.

Protection Degrees

If your installation environment has stable ambient conditions and controlled access, IP30 is the appropriate selection. For process areas subject to water splash or regular wash-down cleaning, IP54 provides the dust and splash protection required. Confirming the IP rating at specification stage avoids costly enclosure modifications after delivery.

Applications

The Customizable MNS Low Voltage Switchgear Withdrawable Power Distribution Cabinet Switchboard 400V 415V 690V MCC Panel is deployed in three primary sectors:

Power Plant LV Auxiliary Distribution: The 5000A/220kA enhanced configuration serves as the primary LV auxiliary switchboard for thermal and combined-cycle power stations, distributing power to boiler feed pumps, cooling water pumps, induced draft fans, and building services. The withdrawable MCC panel design allows individual units to be serviced during planned windows without interrupting the plant auxiliary supply.

Heavy Industrial Motor Control Centers: Steel mills, cement plants, mining operations, and chemical processing facilities deploy the MNS as the central motor control and protection assembly for large LV drives. The 1600A distribution busbar and 1000A withdrawable unit ratings support the full range of LV motor starting and feeder protection requirements. For installations with upstream distance protection relay coordination at the HV level, the MNS's defined short-circuit withstand ratings and available current transformer provisions support the protection coordination study required for grid connection approval.

Data Center and Critical Infrastructure: IP40–IP54 protection and withdrawable maintainability make the MNS a well-suited LV switchboard for data center UPS distribution and critical facility power supply where contractual uptime obligations exclude maintenance-related shutdowns.

Standards and Certification

The Customizable MNS Low Voltage Switchgear Withdrawable Power Distribution Cabinet Switchboard 400V 415V 690V MCC Panel is manufactured under ISO 9001 and carries type-test certification to IEC 61439-1/-2 and GB 7251 at KEMA-accredited independent laboratories. Type tests cover short-circuit withstand at the full 220 kA enhanced rating, temperature rise at 5000A main busbar, IP54 ingress protection, and 100-cycle withdrawable unit mechanical endurance. Factory routine testing covers dielectric withstand, continuity, and functional verification of all interlocks for every unit shipped. Internal separation meets up to Form 4 per IEC 61439. The applicable standard edition should be confirmed with the supplier before specification lock for grid authority submissions.

Product Images

Technical Specifications

To request a quotation for the Customizable MNS Low Voltage Switchgear Withdrawable Power Distribution Cabinet Switchboard 400V 415V 690V MCC Panel, contact JYDQ with your system voltage, busbar current rating, required IP class, functional unit schedule, and project location. FOB pricing from Ningbo or Shanghai; supply capacity 300 sets per month.

FAQ

1. What is the application of MNS low voltage draw-out switchgear?

MNS is modular draw-out type low voltage switchgear. It is used for power distribution, motor controland load management in industrial plants, commercial buildings and power stations. It can realize reliablepower supply and circuit protection for low-voltage loads.

2. What are the structural advantages of MNS draw-out cabinet?

The cabinet adopts modular drawer unit design. Each drawer is an independent functional unit. Thedrawer can be separated from the main circuit safely, which improves safety for maintenance andreplacement.

3. What is the function of medium voltage control cabinet?

Medium voltage control cabinet is used for signal collection, status monitoring and logic control of medium voltage power equipment. It can realize remote monitoring and interlock control for transformers, circuit breakers and distribution lines.

4. What certifications do your MNS and medium voltage control cabinets have?

All MNS low voltage draw-out switchgears and medium voltage control cabinets hold CE certification. We can provide CE documents and complete technical datasheets for tender submission and customs clearance.

5. What warranty service can you get for these cabinets?

We provide 10 years warranty for MNS low voltage switchgear and medium voltage control cabinet. Our technical team provides remote commissioning guidance and fault analysis support during warranty period.