KPD Series Low-Voltage Rail Electric Flat Car

Product Introduction

The KPD Series Low-Voltage Rail Electric Flat Car (also known as KPD rail-mounted electric flat car or low-voltage powered cross-bay transfer car) has a rated load capacity of 6 to 200 tons and draws power from a 36V low-voltage rail system. A 380V power supply is stepped down to 36V by a step-down transformer in the floor-mounted electrical control cabinet and fed to the rails. Conductive sliding shoes on the wheels pick up power from the rail and deliver it to the onboard electrical box, where an onboard step-up transformer raises it back to 380V to drive the motor. With no trailing cables, this system is safe, reliable, resistant to heat and impact, and does not obstruct cross-traffic. It can run on curved and circular tracks, making it an ideal solution for inter-bay material transport in plant facilities.

Product Specifications

• Product Name: Low-voltage rail-powered electric flat car
• Model: KPD / KPDS
• Rated Load Capacity: 6–200 tons (customizable up to 1000 tons)
• Power Supply System: 36V low-voltage rail pickup (step-down transformer + onboard step-up transformer)
• Drive System: Three-phase AC motor (AC380V, soft start)
• Travel Speed: 20–30 m/min
• Travel Distance: Unlimited (additional transformers can be added)
• Operation Mode: Wireless remote control / operation panel, automation-ready
• Place of Origin: Xinxiang, Henan
• Customization: Non-standard design and manufacturing available
• Service Coverage: Nationwide
• After-Sales Service: One-year warranty

Product Features

• No Cables Required: Powered via low-voltage rails — no trailing cables, safe, and resistant to heat and impact.
• Flexible Track Layout: Operates on S-curve, curved, and circular tracks without obstructing cross-traffic.
• Unlimited Travel Distance: Travel range is not restricted — simply add more step-down transformers as needed.
• Safe Voltage: Rail voltage is only 36V, below the human safety threshold, ensuring operator safety.
• Customizable Table Surface: Hydraulic lifting and hoisting systems can be mounted on the table surface to suit various applications.
• Automation-Ready: Easily integrates with remote control and automated control systems for smart production lines.

Working Principle

The KPD Series Low-Voltage Rail Electric Flat Car steps down a 380V power supply to 36V via a step-down transformer in the floor-mounted electrical control cabinet and feeds it to the rails. Conductive sliding shoes on the wheels pick up power from the rail and deliver it to the onboard electrical box, where an onboard step-up transformer raises it back to 380V to drive the motor. The drive system uses a three-phase AC motor (AC380V, 50Hz) with a Protection Rating of IP44/IP54. The soft-start motor can be paired with VFD control. The motor brake is an electromagnetic brake, and the gearbox features a hardened tooth flank for smooth transmission and easy installation.

Product Structure

• Frame System: Welded structure of I-beam, channel steel, steel plate, and angle steel for high load-bearing capacity.
• Power Supply System: Rail insulation layer + conductive sliding shoes + onboard step-up transformer — picks up power from the 36V rail and steps it up to 380V.
• Drive System: Three-phase AC motor + electromagnetic brake + hardened gear reducer + coupling + wheel set.
• Control System: Electrical control cabinet with transformer, rotating warning light, limit switches, etc., supporting remote control.
• Travel System: Cast steel wheels, Φ400–Φ600 mm diameter, tailored to different load requirements.
• Insulation Treatment: Insulation felt, insulation layer, insulation pressure plate, insulation bolts, and waterproof layer installed on the rail.

Product Images

Technical Parameters

Note: KPD is the standard model, while KPDS features two-speed speed control. Table Dimensions can be Custom Non-Standard Manufacturing. The Crane Rail must be properly insulated (insulation felt, insulation layer, insulation pressure plate, insulation bolts, waterproof layer), and rail joints must be connected with copper plates or copper wires to ensure electrical continuity.

Application Scenarios

KPD series low-voltage rail Electric Flat Cars are widely used in machinery manufacturing and metallurgical plants for inter-bay material transport. Since they require no Cable, they are safe, resistant to heat and impact, and do not obstruct cross-traffic. Remote Control and automation are easy to implement, and the cars can run on curved tracks and loop rails. Suitable for harsh environments such as high temperature, dusty, and Explosion-proof areas, the operating distance can be extended without limitation by adding more Transformers.

Selection Guide

Light-Duty Transport: KPD-6T~KPD-16T (6–16 tons), ideal for moving small to medium workpieces between bays within a Workshop. Reference price: RMB 40,000–100,000.

Medium-Duty Transport: KPD-25T~KPD-63T (25–63 tons), suitable for transporting heavy castings and steel coils across workshops. Reference price: RMB 100,000–200,000.

Heavy-Duty Transport: KPD-100T~KPD-200T and Above (100–1,000 tons), designed for ultra-large equipment, shipbuilding sections, and other heavy-load transport. Reference price: RMB 200,000–500,000.

Operating Instructions

1. Before operation, check that the rail insulation is intact, the conductive sliding shoes are in proper contact, and the rail surface is free of obstructions.
2. Select the travel direction via the Remote Control or Operation Panel, and confirm the path is clear before starting.
3. After initial use, add Gear Oil to the axle Gearbox (Transmission), and periodically check for leaks and top up as needed.
4. Periodically inspect Bolt Tightening on the entire vehicle, check for damaged electrical wiring, and verify that the brakes are responsive and reliable.
5. Apply Lubricating Oil regularly to the Gearbox (Transmission), motor sprockets, and chains; replace components promptly if Wear is severe.
6. Inspect and maintain rail insulation components on a regular basis to ensure reliable insulation performance.

Why Choose Kelude Heavy Industry

Service Support

Kelude Heavy Industry provides full life-cycle support for KPD low-voltage rail Electric Flat Cars: selection, Quotation, drawing design, manufacturing, Installation & Commissioning, Operator Training, one-year warranty, and parts Supply. KPJ (Cable Reel powered), KPT (trailing Cable powered), and KPX (battery powered) Electric Flat Cars are also available. For details, call 13903802779 or contact our online sales team — we respond within 24 hours.

FAQ

Q: What is the difference between the KPD low-voltage rail Electric Flat Car and the KPJ/KPT/KPX models?
A: The KPD model draws power from the low-voltage rail (380V stepped down to 36V and conducted through the rail) — no Cable required, immune to heat and impact, and capable of running on S-shaped/curved tracks. Adding more Transformers removes distance limits. The KPJ model uses a Cable Reel, KPT uses a trailing Cable, and KPX runs on battery power.

Q: What are the rail requirements for the KPD low-voltage rail Electric Flat Car?
A: The rail must be properly insulated during installation: insulation felt, insulation layer, insulation pressure plate, insulation bolts, waterproof layer, etc. In addition to standard fishplate connections, rail joints must be bridged with copper plates or copper wires to ensure electrical continuity.

Q: What is the price range for each Load Capacity of the KPD low-voltage rail Electric Flat Car?
A: Since it does not include a battery or Cable Reel, the cost is moderate: light-duty (6–16t) approx. RMB 40,000–100,000; medium-duty (25–63t) approx. RMB 100,000–200,000; heavy-duty (100–200t+) approx. RMB 200,000–500,000. Custom Non-Standard Manufacturing is quoted separately; tax-inclusive and freight costs to be confirmed.