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.

Withdrawable Switchgear LV Cabinet Series — Modular Power Distribution Solution for Continuous, Safe Operation

DSY Withdrawable Switchgear LV is a drawer-type modular low-voltage power distribution system designed for environments where uptime and safety cannot be compromised. Rated at AC 400V (50/60Hz) with main bus current from 630A to 4000A and a rated short-time withstand current up to 100kA/1s, it meets the demanding requirements of data centers, factories, commercial complexes, and industrial automation sites. The cabinet is CNC-formed from cold-rolled steel plate, rated IP40/IP41, and complies with GB 7251.3. With over 60 patents and qualified supplier status for State Grid and China Southern Power Grid, DSY delivers proven engineering backed by 20 years of manufacturing experience.

What Makes This Cabinet Different From Fixed-Type Distribution

Fixed-type switchgear forces a full system shutdown the moment one unit needs servicing. That means downtime, lost production, and safety risks.

This Withdrawable Switchgear Lv design solves all three problems. Each functional drawer unit moves between three mechanical positions — Connected, Test, and Disconnected — so your team can inspect, test, or replace individual units without cutting power to the entire busbar system.

In the Test position, primary power contacts are isolated while auxiliary control circuits stay live for diagnostics. In the Disconnected position, both circuits are fully isolated. This structured approach removes guesswork and significantly reduces the risk of live-line accidents.

For mission-critical facilities like Tier III and IV data centers, offshore platforms, or continuous manufacturing lines, this level of operational continuity is not optional — it is essential.

Product Applications

Technical Specifications

Parameter	Value
Rated Voltage	AC 400V, 50/60Hz
Main Bus Current Range	630A – 4000A
Rated Short-Time Withstand Current	Up to 100kA / 1s
Enclosure Material	Cold-rolled steel plate, CNC formed
Protection Grade	IP40 / IP41
Compliance Standard	GB 7251.3
Drawer Positions	Connected / Test / Disconnected
Interlock Type	Three-position mechanical interlock
Door Lock	Electrical interlocking
Protections Included	Grounding, overload, short circuit, leakage
Smart Integration	Modbus/TCP, Profibus (optional)
Customization	Cabinet size, circuit configuration, OEM available

Key Product Features That Support Real-World Operations

High drawer interchangeability is one of the most practical advantages you get with this system. Faulty units can be swapped out quickly, reducing maintenance downtime without requiring a specialist on-site for an extended period.

Modular layout flexibility lets you freely combine incoming lines, outgoing lines, metering, and compensation circuits within the same cabinet frame. You are not locked into a fixed configuration.

Smart expansion support allows the addition of intelligent instruments, remote measurement and control modules, and power quality monitoring functions. If your facility plans to upgrade to a smart power management system in the future, this cabinet is already prepared for that transition.

Mechanical interlocking prevents hot-plugging errors. The drawer cannot be moved or extracted unless the circuit breaker is in the OFF position. This is a hardware-level safety feature — not a software setting that can be overridden.

Quality Control and Testing Standards

Reliable switchgear requires more than good materials — it demands rigorous process verification at every stage.

DSY subjects each cabinet to dielectric testing to verify insulation integrity, and temperature rise testing to confirm busbar and joint stability under full rated load. Mechanical endurance testing requires 200+ insertion and extraction cycles for withdrawable units, validating contact longevity and silver-plating durability.

The three-position interlock mechanism is individually verified on every unit before shipment. Internal arc fault performance is evaluated according to IEC/TR 61641 to confirm personnel protection during fault conditions.

A full documentation package is provided with every order — CCC certificates, type test reports, and technical drawings — giving your procurement and engineering teams everything needed for approval, commissioning, and compliance records.

Certifications

Application Scenarios

Data centers use this system to manage redundant power distribution for server racks. Individual modules can be replaced without interrupting critical IT loads, which directly supports Tier III and IV uptime requirements.

Heavy industry environments — including oil and gas, mining, and petrochemical sites — often install the cabinet in pressurized E-houses. The withdrawable design minimizes technician exposure time in corrosive or dusty atmospheres during maintenance.

Commercial complexes and municipal engineering projects benefit from the modular configuration that adapts to varying load profiles and future capacity expansion without a full cabinet replacement.

Marine and offshore applications require vibration resistance and compact modularity. The system manages high-density motor control centers for propulsion, drilling equipment, and utility loads on ships and oil rigs.

Customization and Supply Advantages

Cabinet size and internal circuit configuration can be tailored to your primary system diagram. Whether you need a compact layout for a single substation room or a multi-section lineup for a large industrial facility, DSY can engineer the solution to match.

OEM customization services are available for contractors and system integrators who require private-label products or project-specific documentation. Remote after-sales technical support is included as standard, which matters when your team is commissioning equipment in a remote location.

With RMB 50.6 million in registered capital, 40 in-house technicians, and more than 60 patents, DSY has the engineering depth to support complex procurement requirements from specification through delivery.

Packaging & Shipping

Team

FAQ

Q1: What is the main operational advantage of withdrawable switchgear LV over fixed-type panels?

Individual drawer units can be serviced or replaced in minutes without shutting down the entire system. This directly reduces Mean Time to Repair and keeps critical loads running.

Q2: Can a drawer be removed while the circuit breaker is still closed?

No. The mechanical interlock requires the circuit breaker to be in the OFF position before the drawer can move. This is a hardware-level restriction.

Q3: Is it possible to mix different drawer sizes within one vertical section?

Yes. The modular design supports various unit heights within a single frame, allowing you to optimize space based on circuit requirements.

Q4: What maintenance does the withdrawable contact system require?

Periodic inspection of primary contact fingers and application of high-conductivity electrical grease is recommended to prevent oxidation and overheating over time.

Q5: Does the cabinet support smart monitoring integration?

Yes. Optional smart instruments and communication modules support Modbus/TCP and Profibus protocols for real-time remote monitoring and power quality analysis.

Q6: What documentation is provided with each order?

Each shipment includes CCC certificates, type test reports, technical drawings, and remote after-sales support. OEM documentation can also be arranged on request.

Contact Us

Ready to specify your Withdrawable Switchgear Lv project? Email our team at [email protected] and get a tailored technical proposal within one business day.