Withdrawable Switchgear Switch Control Cabinet

The Withdrawable Switchgear Switch Control Cabinet is a Medium voltage metal-enclosed switchgear unit where key components such as circuit breakers can be physically withdrawn from the main housing for inspection, maintenance, or replacement. Unlike fixed-switchgear, this unit allows operators to isolate and remove a breaker without de-energizing the entire busbar system. It is widely used to control, protect, and isolate electrical equipment in industrial plants, substations, and commercial buildings. Simply put, it manages power flow while ensuring operator safety and system continuity.

Product Parameters (Specification)

Certification and Quality Assurance

Lugao manufactures withdrawable Medium voltage switchgear according to project technical requirements and applicable standards such as IEC 62271-200. Before shipment, routine test reports and inspection photos can be provided according to the confirmed technical agreement.

• IEC 62271-200 based design and testing
• Power frequency withstand test
• Mechanical operation test
• Interlock function test
• Secondary wiring inspection
• Partial discharge test where applicable
• Factory test report before shipment

Product Features and Applications

Q1: What makes the Withdrawable Switchgear Switch Control Cabinet safer than fixed type?

A: The withdrawable design physically isolates the breaker from live busbars when pulled out. This creates a visible disconnect gap, eliminating accidental arc flash risks during maintenance. Lugao adds shutter mechanisms that automatically cover fixed contacts when the module is withdrawn, further enhancing safety.

Q2: What applications best suit this cabinet?

A: Ideal for:

● Power plants (auxiliary power distribution)

● Data centers (need high reliability and quick breaker replacement)

● Oil & gas facilities (safe isolation in hazardous areas with IP54 option)

● Metro and rail systems (frequent breaker operations under load)

● Mining & steel plants (high short-circuit withstand required)

Q3: Can it be integrated with smart monitoring?

A: Yes. Lugao offers optional sensors and communication modules (Modbus, IEC 61850) for remote position monitoring of each withdrawable module.

Production Details & Competitive Advantages

Production Details:

Each Lugao Withdrawable Switchgear Switch Control Cabinet is manufactured using laser-cut stainless steel or galvanized sheet with powder coating (minimum thickness 80μm). The withdrawable rails are chromium-plated for smooth motion and rated for 10,000 insertion/withdrawal cycles. Fixed contacts are silver-plated (at least 10μm thickness) to minimize contact resistance. All secondary control wiring uses flame-retardant, cross-linked polyethylene insulated cables. Every unit undergoes a 48-hour burn-in test and partial discharge measurement (<5pC at 1.1Ur).

Competitive Advantages vs. Similar Products:

Packaging, Shipping & After-Sales Service

Packaging:

Each withdrawable module is shipped separately in anti-static foam padding, then enclosed in a wooden crate with humidity indicators. The main cabinet is wrapped in three layers: VCI anti-rust film → bubble wrap → plywood export case with steel strapping. All fixings and tools are bagged and attached inside the door.

Shipping:

By sea (standard): 20GP or 40HQ containers. Air or rail transport can be arranged for urgent projects upon request. Delivery term: FOB Ningbo or CIF to major ports.

After-Sales Service:

● Warranty period: 12 months from commissioning or 18 months from shipment, whichever comes first.

● Remote technical support (video, drawings) – response within 2 hours.

Information Needed for Quotation

To provide an accurate quotation for the Withdrawable Medium Voltage Switchgear Cabinet, please send us the following information:

• Rated voltage and frequency
• Single-line diagram
• Rated current of each feeder
• Short-circuit current requirement
• Number of incoming and outgoing panels
• Protection relay brand and model requirement
• Metering and communication requirements
• Internal arc classification requirement
• Cable entry direction
• Quantity and destination port
• Applicable local standard or utility requirement

FAQs – Customer Questions & Answers

Q1: Can the Withdrawable Switchgear Switch Control Cabinet be retrofitted into an old substation with limited space?

A: Yes. Its modular and compact design (typical width 650mm for 12kV) allows replacement of older fixed-switchgear without civil works. We provide free layout verification upon request.

Q2: What happens if the mechanical interlock fails while the breaker is in the connected position?

A: Lugao cabinets include an emergency manual release accessible through a sealed cover. This is a fail-safe design – the breaker can still be withdrawn using the tool provided. However, we recommend only trained personnel perform this.

Q3: Does the price include all withdrawable modules and primary copper bars?

A: Standard quotation includes main circuit breaker module and all internal copper bars (fully machined and plated). Optional modules like PT trucks or metering units are quoted separately.

Q4: How do I verify that the cabinet meets IEC 62271-200?

A: Each unit ships with a factory test certificate including partial discharge, power frequency withstand, and dynamic stability test reports. Third-party inspection (e.g., SGS, BV) is welcome at our facility.