chassis truck is primarily designed to support circuit breakers, transformers, and other components in withdrawable switchgear. It facilitates the pushing and extraction of the chassis. As an auxiliary operation, it connects components and busbars. When operated with the internal mechanism of the circuit breaker and the interlock mechanism of the mid-placed cabinet, it meets the interlock requirements of the “5 Preventions” stipulated in GB3906. The specific functions are as follows:
The circuit breaker can only be closed when the handcart is in the testing, isolating, or working position. When the handcart is in the locked state, this prevents misconnection and mismatched isolation contacts with the load.
If the handcart is in the working position or moves 110mm away from the testing/isolating position, the earthing switch fails to close, thus avoiding unintentional operation of the switch.
When the earthing switch is closed, the handcart cannot shift from the testing/isolating position to the working position, preventing the circuit breaker from closing inadvertently.
Once the chassis enters the cabinet and moves away from the testing/isolating position, the handcart cannot be drawn out of the cabinet.
DPC Chassis truck definition
Note: There are five types of lock plates available for selection. The standard specification is 8B.141.012. If you require any of the other four lock plates, please specify your choice when placing the order.
The DPC-4-800/XC2 chassis truck is a high-performance component designed for KYN28A high voltage switchgear systems. Engineered with VD4 compatibility, integrated earthing contacts, and interlock mechanisms, this chassis truck ensures safe, efficient, and reliable operation in industrial electrical systems. Its robust design addresses critical operational challenges such as safe breaker insertion, high load handling, and precise alignment.
This guide provides an in-depth analysis of the core advantages, operational guidelines, troubleshooting procedures, environmental performance, and maintenance practices for the DPC-4-800/XC2 Chassis Truck, optimized for engineers, technical personnel, and B2B clients seeking detailed specifications.
The chassis truck is specifically designed to handle KYN28A switchgear rated for high-voltage operations, with VD4 breaker compatibility. This ensures seamless integration with existing switchgear configurations, supporting a range of industrial applications from power distribution to substations.
Safety is a critical requirement for high-voltage switchgear. The interlock system prevents accidental withdrawal or insertion of the breaker while the system is energized. This significantly reduces operational hazards and enhances personnel safety.
Equipped with earthing contacts, the chassis truck ensures safe discharge of residual currents before maintenance or removal. The earthing system protects both personnel and equipment from electrical faults.
Constructed with industrial-grade materials, the chassis truck withstands heavy loads and repetitive operations. Its reinforced frame and precision rollers ensure smooth movement along switchgear tracks while maintaining structural integrity over long-term use.
The DPC-4-800/XC2 chassis truck offers accurate alignment for VD4 breakers, minimizing wear on Switchgear Components and reducing the risk of misalignment during operation.
| Feature | Description | Benefit |
|---|---|---|
| VD4 Compatibility | Compatible with standard VD4 breakers | Ensures seamless integration |
| Interlock System | Mechanical interlock prevents unSafe Operation | Enhances safety |
| Earthing Contacts | Automatic earthing during operation | Reduces electrical hazards |
| Heavy-Duty Frame | Industrial-grade construction | Supports long-term use |
| Precision Rollers | Smooth movement on tracks | Minimizes wear on switchgear |
Before using the DPC-4-800/XC2 chassis truck, confirm the following:
Ensure the switchgear is de-energized and locked out.
Verify that the chassis truck is compatible with the specific VD4 breaker model.
Inspect for physical damage, loose components, or worn rollers.
Check that interlock and earthing mechanisms operate correctly.
Align the chassis truck with the switchgear rails.
Slide the truck carefully, ensuring rollers move smoothly without obstructions.
Engage the interlock system before inserting the VD4 breaker.
Connect the earthing contacts to the designated points for operational safety.
Verify alignment and stability before energizing the system.
Avoid excessive force during insertion or withdrawal.
Ensure the chassis truck is clean and lubricated for optimal roller performance.
Regularly check the interlock and earthing contacts for signs of wear or corrosion.
Operate the truck within the specified load limits to prevent structural stress.
| Issue | Possible Cause | Recommended Action |
|---|---|---|
| Roller obstruction | Debris on rails | Clean rails and lubricate |
| Interlock failure | Mechanical wear or misalignment | Inspect and replace interlock parts |
| Earthing contact malfunction | Corrosion or misalignment | Clean contacts and adjust position |
| Misaligned breaker | Improper chassis placement | Realign chassis and recheck |
| Excessive noise | Worn rollers | Replace rollers |
Identify the problem by visual inspection and operational testing.
Isolate the chassis truck from the switchgear to prevent electrical hazards.
Inspect moving parts, including rollers, interlocks, and earthing contacts.
Clean, lubricate, or replace faulty components.
Test operation before re-energizing the system.
Monthly Inspection: Check roller alignment, interlock functionality, and earthing connections.
Quarterly Maintenance: Lubricate rollers, tighten structural bolts, and inspect for corrosion.
Annual Maintenance: Comprehensive inspection including load testing and component replacement as needed.
Remove debris from rails and chassis surfaces.
Wipe interlock mechanisms and earthing contacts with a dry cloth.
Use industrial-grade lubricants for rollers.
Avoid water or chemical cleaners that may damage insulation or metal surfaces.
The DPC-4-800/XC2 chassis truck is made with recyclable industrial materials and is free from hazardous substances, supporting environmentally responsible manufacturing.
Its low-friction roller design minimizes energy required for operation, reducing the operational load on switchgear systems.
Durable components reduce the need for frequent replacement, minimizing industrial waste and promoting long-term sustainability.
Always de-energize the switchgear before maintenance.
Wear appropriate personal protective equipment (PPE) including insulated gloves and safety glasses.
Follow interlock and earthing protocols rigorously.
Avoid standing in line with the chassis truck during insertion or withdrawal.
Train operators in safe handling procedures and routine checks.
| Parameter | Specification |
|---|---|
| Model | DPC-4-800/XC2 |
| Compatible Switchgear | KYN28A High Voltage |
| Breaker Compatibility | VD4 Series |
| Earthing Contacts | Integrated |
| Interlock | Mechanical Safety Interlock |
| Frame Material | Industrial Steel Alloy |
| Load Capacity | Rated per VD4 specifications |
| Operation Temperature | -25°C to 55°C |
| Environmental Rating | IP20 |
Q1: Can this chassis truck be used with non-VD4 breakers?
A1: No, the DPC-4-800/XC2 is designed specifically for VD4 compatibility to ensure precise alignment and safety.
Q2: How often should rollers be replaced?
A2: Rollers should be inspected quarterly; replacement is recommended when wear affects smooth movement.
Q3: Is earthing contact replacement user-serviceable?
A3: Yes, with proper tools and safety precautions, earthing contacts can be replaced.
Q4: Can the chassis truck operate in extreme temperatures?
A4: Yes, it is rated for operation from -25°C to 55°C, suitable for most industrial environments.
Q5: What maintenance is required for the interlock system?
A5: Monthly inspection, cleaning, and occasional lubrication are sufficient for optimal operation.
Power Distribution Substations
Industrial High Voltage Switchgear Systems
Energy Generation Plants
Electrical Maintenance Workshops
High-Reliability Industrial Automation Systems
The DPC-4-800/XC2 Chassis Truck is a critical component for KYN28A high voltage switchgear systems, providing high operational precision, integrated safety features, and environmental compliance. Proper installation, routine maintenance, and adherence to safety protocols ensure long-term performance, reduced downtime, and operational reliability.
Its robust construction, interlock mechanism, and earthing contacts make it an ideal solution for industrial environments requiring safe, durable, and precise high voltage switchgear operations.
Phone: +8613736779975
E-mail: sales@vcbbreaker.com
Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China
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