1. The low-voltage withdrawable switch cabinet is a drawer-type modular low-voltage power distribution equipment, suitable for data centers, factories, commercial complexes, municipal engineering and industrial automation power distribution scenarios. 2. Rated voltage AC400V, 50/60Hz; main bus current 630A-4000A, rated short-time withstand current up to 100kA/1s. 3. The cabinet is made of cold-rolled steel plate and CNC formed. It is equipped with a withdrawable circuit breaker drawer unit. The enclosure protection grade is IP40/IP41 and complies with the GB 7251.3 standard. 4. The drawer has three-position mechanical interlocking for working, testing and disconnecting. The cabinet door is electrically locked and equipped with grounding, overload, short circuit and leakage protection to ensure the safety of personal equipment. 5. The drawer units are highly interchangeable, faulty units can be quickly replaced, reducing power outage maintenance time, and the operation reliability is high. 6. Modular drawer layout, incoming lines, outgoing lines, metering, and compensation circuits can be freely combined and configured. 7. The cabinet size and circuit configuration can be customized according to the primary system diagram, supporting the expansion of smart instruments, remote measurement and control, and power quality monitoring functions. 8. Provide a full set of CCC certificates, type test reports, technical drawings, remote after-sales support and OEM customization services.

Indoor Withdrawable LV Switchgear — Drawer-Type Modular Distribution Cabinet for Mission-Critical Power Systems

DSY Switchgear’s Indoor Withdrawable LV Switchgear is a professional drawer-type modular low-voltage power distribution solution, ideal for key scenarios that require continuous power supply and high operational safety. This equipment is rated at AC400V (50/60Hz), with a main bus current ranging from 630A to 4000A and a 1-second short-time withstand current up to 100kA. Featuring IP40/IP41 enclosure protection, it is manufactured with CNC cold-rolled steel plates and fully compliant with GB 7251.3 and IEC 60439-1 standards. Founded in 2005 with a registered capital of RMB 50.6 million and a professional team of 40 in-house technicians, DSY provides fully CCC-certified products with complete type test reports, delivering reliable low-voltage power distribution equipment for data centers, industrial plants, commercial complexes and municipal infrastructure projects.

Product Applications

What Is Withdrawable LV Switchgear and Why Does It Matter?

Traditional fixed low-voltage switchgear requires full system shutdown for single-unit maintenance or replacement, which easily leads to prolonged downtime and operational losses for continuous-production facilities.

The Indoor Withdrawable LV Switchgear completely solves this industry pain point with its unique modular drawer structure. Each functional drawer unit supports three independent operating states: Connected, Test and Disconnected. Staff can carry out unit maintenance, testing and replacement without shutting down the overall busbar system, effectively shortening equipment maintenance time (MTTR) and greatly improving on-site operational safety.

For 24/7 uninterrupted operation facilities, this withdrawable modular design is not an optional upgrade, but a necessary configuration for stable power guarantee.

Technical Specifications

Parameter	Value
Rated Voltage	AC 400V
Rated Frequency	50Hz / 60Hz
Main Bus Rated Current	630A – 4000A
Rated Short-Time Withstand Current	20 / 30 / 50 / 80 / 100kA (1s)
Core Component	Withdrawable circuit breaker drawer unit
Enclosure Protection Grade	IP40 / IP41
Applicable Standards	GB 7251.3, IEC 60439-1, GB/T 14048.1
Cabinet Structure	Drawer-type modular, cold-rolled steel CNC forming
Drawer Operating Positions	Working / Testing / Disconnected

Certifications

Key Product FeaturesThree-Position Mechanical Interlocking

Each drawer unit is designed with three standard operating positions: Working, Testing and Disconnected. The built-in mechanical interlock mechanism mandates the circuit breaker to be fully powered off before the drawer is pushed, pulled or extracted. This design completely avoids hot plugging misoperation risks and maximizes safety for both operators and equipment.

High Interchangeability for Fast Recovery

All drawer functional units feature high universal interchangeability. Once a single unit fails, on-site staff can quickly replace the faulty drawer with a spare one without overall system shutdown, minimizing equipment downtime and ensuring continuous and stable operation of the power distribution system.

Modular Circuit Layout

The cabinet supports free combined configuration of multiple functional circuits including incoming lines, outgoing lines, metering and power factor compensation circuits. The flexible modular layout can be tailored to match the power distribution demands of small commercial buildings and large industrial sites.

Robust Cabinet Construction

The whole cabinet adopts CNC integrated forming technology with high-quality cold-rolled steel plates. It features stable structural rigidity and standardized internal wiring layout, ensuring long-term stable operation in various conventional indoor power distribution environments.

Built-In Multi-Layer Protection

The equipment integrates complete grounding, overload, short-circuit and leakage protection functions. Matched with cabinet door electric locking protection, it effectively prevents unauthorized access and misoperation during live equipment operation, building a multi-dimensional safety protection system.

Smart Expansion Ready

The cabinet structure reserves expansion interfaces for smart meters, remote measurement and control modules and power quality monitoring equipment. It supports Modbus/TCP communication protocol, enabling real-time data interconnection with BMS and SCADA systems to realize intelligent power distribution management.

Application Scenarios

Indoor Withdrawable LV Switchgear is widely applicable to various key indoor low-voltage power distribution scenarios with high requirements for power supply continuity and intelligent management.

Data Centers

Data centers require N+1 and 2N redundant power supply design. The withdrawable hot-swap structure allows rapid replacement of faulty components without affecting server operation, fully meeting Tier III and Tier IV data center power supply reliability standards.

Industrial Plants (Manufacturing, Oil & Gas, Mining)

Industrial sites feature high dust and slight vibration. The independent compartment design and IP40/IP41 protection grade isolate internal core components from external interference. Meanwhile, offline single-unit maintenance avoids production line shutdown, guaranteeing continuous industrial production.

Commercial Buildings and Complexes

Suitable for urban high-density commercial buildings with limited equipment room space. The compact modular structure saves installation space, and the intelligent monitoring function supports remote fault diagnosis and energy consumption management, reducing daily operation and maintenance costs.

Municipal Engineering

It adapts to variable load operation characteristics of water treatment plants, transportation hubs and other public utility facilities. The flexible circuit configuration and long-service-life design meet the long-term and stable power distribution demands of municipal engineering projects.

Customization and Supply Support

DSY provides all-round personalized customization services according to customers’ one-line system diagrams, including cabinet size optimization, internal circuit configuration adjustment and secondary wiring scheme customization, to match different project technical specifications.

With more than 60 technical patents and a professional 40-person technical team, we support whole-process customized engineering services from scheme confirmation to production and delivery. OEM customized services are available for distributors and engineering contractors.

Each order is delivered with complete CCC certification documents, type test reports and technical drawings, paired with full-lifecycle remote after-sales technical support.

Packaging & Shipping

Quality Assurance

We implement strict dual-inspection standards for mechanical performance and electrical performance of all products before delivery. Core quality inspection items include:

Three-position interlock mechanism function verification to ensure accurate and safe switching

Dielectric performance testing to confirm equipment insulation reliability

Full-load temperature rise testing to verify long-time operating stability

Mechanical endurance testing of more than 200 insertion and extraction cycles to ensure stable contact performance and durable silver-plated layer

All products strictly comply with GB 7251.3, IEC 60439-1 and GB/T 14048.1 standards and have passed official CCC certification.

Exhibitions

Frequently Asked Questions

Q1: What are the three working positions of the withdrawable drawer unit?

A: It includes three standard states: Connected, Test and Disconnected. The connected state means primary and secondary circuits are fully engaged; the test state disconnects the primary circuit while retaining secondary control for debugging; the disconnected state completely isolates all circuits to ensure safe maintenance.

Q2: Can different specification drawers be mixed in one cabinet?

A: Yes. The modular frame supports flexible matching of drawer units with different heights and specifications in a single cabinet, which optimizes internal space and meets customized circuit layout requirements.

Q3: What safety protection functions does the switchgear integrate?

A: It is equipped with complete overload, short-circuit, leakage and grounding protection. The matched cabinet door electric lock can effectively prevent accidental opening and misoperation during live operation, ensuring overall operational safety.

Q4: Does this equipment support intelligent monitoring and remote control?

A: Absolutely. It can be expanded with smart metering, remote control and power quality monitoring modules. It supports Modbus/TCP protocol docking, realizing seamless connection with BMS and SCADA systems for intelligent power management.

Q5: Is project-specific customization available?

A: Yes. We can customize cabinet dimensions, internal circuit schemes and secondary wiring solutions according to project drawings. Professional OEM services are also provided for partners with brand and personalized configuration needs.

Q6: What documents and after-sales support are provided?

A: Each shipment is attached with complete CCC certificates, type test reports and technical drawings. We provide lifelong remote technical consultation and after-sales support to solve project operation problems in a timely manner.

Contact Us

If you are looking for high-reliability, maintainable and intelligent Indoor Withdrawable LV Switchgear for your low-voltage power distribution projects, please feel free to contact our professional team for targeted technical guidance and accurate project quotation. Email us at [email protected].