Dpc-4 Series Chassis Truck Vcb Trolley For Vacuum Circuit Breaker

Shaanxi Longxiang Electrical Co., Ltd. is one of the most reliable manufacturers and suppliers of dpc-4 series chassis truck vcb trolley for vacuum circuit breaker in China. With abundant experience, we are committed to providing high quality customized products with competitive price. Welcome to buy premium dpc-4 series chassis truck vcb trolley for vacuum circuit breaker made in China here from our factory.

Chassis truck is mainly used for undertaking and withdraw components such as circuit breaker and transformer in withdrawable type switchgear, as auxiliary operation of connection between components and busbar.

As working coordinately with internal mechanism of circuit breaker and interlock mechanism of GZS, chassis can meet the "Five Preventions" interlock requirements. The detailed function as following:

1.Only the truck on testing/isolating or working position, the circuit breaker can close;after the circuit breaker closes, the truck can not be moved, which prevent the circumstance that on-load closing and opening of isolating contact by accident.

2. When the truck is on working position or 10mm away from testing/isolating position,earthing switch can not close, so prevent closing earthing switch with electricity by accident.

3. As the earthing switch closes, the truck can not move from testing/isolating position to working position, preventing earthing switch close circuit breaker on closing position.

4. As entering into switchgear, once chassis leaves the testing/isolating position, the truck can not be withdrawed form switchgear.

• Push truck from transfer trolley into switchgear steadily. Do not strike chassis toprevent damage. Then make sure two handlebars reset and clapper plug into square hole of guide rail
• Swing the chassis to working or testing position. Please remove handle and make sure handlebar frame trip out, or the chassis is not on working or testing position completely,at that time the screw rod is not locked and auxiliary switch may not be switched over.
• The resistance is maximum when the moving contact just plug into static contact; it is normal if locating rack deforms. If obstruction occurs during swinging, the locating rack deforms greatly, please stop swinging and find out reasons.

When unpacking the case,inspect the accessories and relative documents according to packing list; check if chassis is damaged during transportation. Put petroleum jelly or calcium base grease in friction transmission position after inspection. As examine switchgear, please examine chassis at the same time. Clean and lubricate chassis to assure it is in sound condition.

 

Shaanxi Longxiang Electrical Co., Ltd. is located in Baoji City, Shaanxi Province, China.It covers an area of 26,000 square meters. The annual production capacity of the company is 17,600 sets of electrical equipment. The main products include 12kV–110kV high voltage vacuum circuit breakers, as well as complete set of high and low voltage switchgear equipment and its accessories.Our products are widely used in supporting services across various sectors, including electric power, petrochemicals, smelting, water conservancy, steel, coal, and new energy sources such as wind power etc. and also exported to Southeast Asia, the Americas, Central Asia, Europe and other regions.

 

Shaanxi Longxiang Electrical Co., Ltd. has a professional R&D team with over 20 years of industry experience, providing you with reliable technical support. Our advanced production lines can strictly control production operation quality. All products will be inspected strictly to ensure full compliance with ISO 9001 standards as well as relevant industry standards such as IEC.

 

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Strict quality inspection for  withstand voltage and mechanical characteristics, reliable performance of electrical products.

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Sufficient production capacity ensures on-time delivery for both trial and bulk orders.

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With over 20years of expert engineering team for technical consultation, scheme design and after-sales technical support.

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One-stop responsive customer service. We offer timely quotation, order tracking, shipping arrangement and fast after-sales support for global clients.

 

 

01.

A: The VCB trolley is a movable carrier mechanism for withdrawable switchgear. It supports the vacuum circuit breaker and enables smooth racking between the test position and working position. It cooperates with the cubicle interlock system to ensure safe switching operation.

02.Can this trolley mechanism realize five-prevention interlock?

A: The trolley alone cannot achieve the interlock function. When the trolley, cubicle, VCB, earthing switch and shutter mechanism are fully matched and properly commissioned, the complete switchgear assembly complies with GB 3906 / IEC 62271-200 interlock requirements for preventing incorrect operations.

03.

A: Typical causes: ① VCB is in closed position; ② Earthing switch is closed and locked; ③ Shutter mechanism jammed; ④ Deformed lead screw or foreign debris on guide rail; ⑤ Misaligned interlock plate or overtraveled auxiliary switch.

⚠️ Never force the crank handle! Confirm the primary circuit is de-energized, clear the fault before operation.

04.

A: Direct interchange is generally not allowed. Mounting hole layout, lead screw stroke, interlock interface and positioning dimensions are customized for specific VCB models. Interface parameters must be verified before application.

05.

A: Yes. The manual trolley is driven by hand crank and lead screw with simple structure and high reliability. The motorized trolley is fitted with a drive unit to support local or remote automatic racking, widely used in intelligent switchgear. Some models retain emergency manual operation, which should be confirmed at order placement.

06.

A: Maintenance checklist: Clean guide rails and lead screw and apply suitable grease; Inspect interlock brackets and pins for deformation or cracking; Verify micro-switch signal feedback; Check continuity of earthing path; Tighten loose fasteners.

For more detailed specifications, installation instructions, or project-based vacuum circuit breaker customization, please feel free to contact our us for one-on-one professional support and free quotation.