KPD Series Low-Voltage Rail Electric Flat Car
Product Introduction
KPD Series Low-Voltage Rail Electric Flat Car (KPD series low-voltage rail-powered electric flat car) operates on a safe voltage (36V/48V or below) supplied through the rail. Available in models KPD-2t through KPD-150t, with Rated Load Capacity ranging from 2 to 150 tons. The KPD series steps down standard line voltage to a safe level before feeding it to the rail, which then powers the car's motor. With no trailing cables and no floor wiring required, it is impervious to heat damage, impact, and does not obstruct cross-traffic — making it the safest of all electric rail car types. Based on motor configuration, the KPD series is available in three variants: KPD (two-phase 380V motor), KPDS (three-phase 380V motor), and KPDZ (two-phase DC motor).
Product Specifications
- Product Name: KPD Series Low-Voltage Rail Electric Flat Car
- Also Known As: Floor transfer car / Rail transfer cart / Low-voltage rail-powered flat car
- Model: KPD-2t ~ KPD-150t (13 specifications)
- Rated Load Capacity: 2 ~ 150t
- Power Supply: Low-voltage rail supply (36V/48V safe voltage)
- Motor Type: KPD (two-phase 380V) / KPDS (three-phase 380V) / KPDZ (two-phase DC)
- Travel Speed: 0 ~ 25m/min
- Operation Mode: Wired + Wireless remote control
- Category: Ground conveying machinery
- Place of Origin: Changyuan, Xinxiang, Henan
- Customization: Non-standard customization available
- Production Lead Time: 10 ~ 20 days
- Supply Coverage: Nationwide
- Delivery Method: Customer pickup or freight forwarding
Product Features
Low-Voltage Rail Supply · Safe & Reliable: Powered through the rail at a safe 36V/48V, eliminating the risk of high-voltage electric shock — the highest safety rating among all electric flat cars.
Cable-Free · Obstruction-Free: No trailing cables to worry about. Impervious to heat, impact, and does not obstruct cross-traffic — ideal for complex environments with multiple cars operating in tandem.
Multiple Motor Options: Three motor configurations — KPD (two-phase 380V), KPDS (three-phase 380V), and KPDZ (two-phase DC) — to suit different power supply conditions.
Extended Travel Distance: Standard travel length of 50–70m; longer distances can be accommodated with copper busbar compensation lines and additional step-down transformers.
Wide Load Range: 13 specifications from 2t to 150t, covering light to ultra-heavy loads to meet the vast majority of workshop cross-bay transport needs.
Rail-Guided: Travels along fixed rails with precise and reliable trajectory — ideal for frequent transport on fixed routes.
Working Principle
Working principle of the KPD series low-voltage rail electric flat car: Three-phase AC power is stepped down to a safe voltage of 36V or 48V by a step-down Transformer, then connected to steel rails laid on the floor. The flat car picks up the low-voltage current from the rails through its wheels, which is then rectified and conditioned by the onboard electrical control module before being supplied to the motor, driving the car along the rails. Since safe voltage is used for power supply, there is no risk of electric leakage or shock. The KPD model uses a two-phase 380V motor (tapping two phases from three-phase supply), the KPDS model uses a three-phase 380V motor, and the KPDZ model uses a two-phase DC motor. The flat car is controlled via a wired pendant or wireless remote for forward, reverse, and stop operations.
Product Structure
The KPD series low-voltage rail electric flat car consists of the following core components:
Frame: Steel Plate Welding structure that bears the load.
Rail Power Pickup System: Draws power from the low-voltage rail through the wheels.
Step-Down Transformer: Reduces 380V to 36V/48V to supply the rail.
Motor Drive System: KPD two-phase / KPDS three-phase / KPDZ DC motor drive.
Control System: Wired + wireless remote control for forward, reverse, and stop.
Brake: Electromagnetic Braking, automatically engages when the car stops.
Product Images
Technical Parameters
| Parameter | KPD-2t | KPD-5t | KPD-10t | KPD-16t | KPD-20t | KPD-25t | KPD-30t | KPD-40t | KPD-50t | KPD-63t | KPD-80t | KPD-100t | KPD-150t |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rated Load Capacity(t) | 2 | 5 | 10 | 16 | 20 | 25 | 30 | 40 | 50 | 63 | 80 | 100 | 150 |
| Table Surface-Length(mm) | 2000 | 3500 | 3600 | 4000 | 4000 | 4500 | 4500 | 5000 | 5500 | 5600 | 6000 | 6500 | 10000 |
| Table Surface-Width(mm) | 1500 | 2000 | 2000 | 2000 | 2200 | 2200 | 2200 | 2500 | 2500 | 2500 | 2600 | 2800 | 3000 |
| Table Surface-Height(mm) | 450 | 450 | 500 | 500 | 550 | 600 | 600 | 650 | 650 | 750 | 800 | 850 | 1200 |
| Wheel Base(mm) | 1200 | 2500 | 2600 | 2800 | 2800 | 3200 | 3200 | 3800 | 4200 | 4300 | 4700 | 4900 | 7000 |
| Gauge (Inside Rail Distance)(mm) | 1200 | 1435 | 1435 | 1435 | 1435 | 1435 | 1435 | 1435 | 1435 | 1435 | 1800 | 2000 | 2000 |
| Wheel Diameter(mm) | Φ270 | Φ300 | Φ300 | Φ350 | Φ350 | Φ400 | Φ400 | Φ500 | Φ500 | Φ600 | Φ600 | Φ600 | Φ600 |
| Number of Wheels | 4 | 8 | |||||||||||
| Ground Clearance(mm) | 50 | 75 | |||||||||||
| Travel Speed(m/min) | 0~25 | 0~20 | 0~18 | ||||||||||
| motor power(kW) | 0.8 | 1.5 | 1.5 | 2.2 | 2.5 | 3 | 4 | 5.5 | 5.5 | 7.5 | 7.5 | 11 | 15 |
| Transformer Power(kVA) | 3 | 5 | 5 | 6.8 | 6.8 | 6.8 | 10 | 10 | 10 | 20 | 20 | 30 | 30 |
| Travel length(m) | 70 | 60 | 50 | ||||||||||
| Reference Weight(t) | 2.8 | 3.6 | 4.2 | 5.5 | 5.9 | 6.5 | 6.8 | 7.6 | 8 | 10.8 | 12.8 | 14.6 | 26.8 |
| Recommended Crane Rail | P15 | P18 | P18 | P24 | P24 | P38 | P38 | P43 | P43 | P50 | P50 | QU100 | QU100 |
The table above lists the Technical Specifications for all 13 models in the KPD series low-voltage rail electric flat car range, from KPD-2t to KPD-150t. Each model comes with one step-down transformer; additional transformers can be added based on travel distance. Table Dimensions can be customized to non-standard sizes. Three motor options are available: KPD, KPDS, and KPDZ. Contact customer service for a high-resolution copy of the Technical Specifications.
Applications
KPD series low-voltage rail electric flat cars are widely used in:
Inter-workshop Transfer: Frequent material transport between multiple workshops along fixed rails.
Steel & Metallurgy: High-frequency transfer of heavy materials such as steel coils, steel plates, and castings.
Machinery Manufacturing: Cross-workshop transport of heavy components and Assembly Line feeding.
Shipbuilding & Heavy Industry: Transport of large sections and structural components.
Cement & Building Materials: In-workshop transfer of heavy precast components and raw materials.
Warehouse & Yard: Storage applications requiring frequent transport along fixed rail routes.
Selection Guide
KPD-2~10t: Light-duty rail transport, ideal for small to medium workshops. Standard gauge 1435mm or narrow gauge 1200mm. Reference price: 30,000–80,000 RMB.
KPD-16~30t: Medium-duty mainstream models, widely used in machinery manufacturing and the automotive industry. Reference price: 80,000–180,000 RMB.
KPD-40~63t: Heavy-duty models for steel & metallurgy and shipbuilding. Reference price: 180,000–350,000 RMB.
KPD-80~150t: Ultra-heavy-duty flat cars for large castings, forgings, and steel coil transport. Reference price: 350,000–800,000 RMB.
KPD vs. KPDS vs. KPDZ Motor Options
KPD (Standard): Two-phase 380V motor, drawing two phases from the three-phase supply. Simple structure, low cost, and the standard configuration for the KPD series. Suitable for most standard operating conditions.
KPDS (Three-Phase): Three-phase 380V motor. Requires an onboard three-phase inverter to convert the single-phase power collected from the rail to three-phase. Provides smoother operation, ideal for applications demanding high running Stability.
KPDZ (DC): Two-phase DC motor. Offers smooth Speed control and high starting torque, ideal for frequent start-stop cycles and precise speed regulation.
Selection Advice: Choose KPD for standard conditions, KPDS for smoother operation, and KPDZ for frequent start-stop and precise speed control.
Operating Instructions
Rail Requirements: Rails must be laid level with proper insulation (insulated from the ground), and gauge must conform to the Technical Specifications. For long-distance operation, a Copper busbar compensation line is required.
Pre-Operation Checks: Verify rail insulation integrity, Transformer functionality, and stable wheel power collection.
Startup & Operation: Control forward, reverse, and stop functions via wired or Wireless remote control. Speed is infinitely adjustable from 0 to 25m/min.
Safety Precautions: The KPD system uses a safe 36V voltage, offering high safety. However, keep the rail area clear of debris to prevent short circuits.
Maintenance: Periodically check rail Insulation Resistance, Transformer oil level, wheel Wear, motor bearing Lubrication, and power collection contact condition.
Why Choose Kelude Heavy Industry
Safe Voltage · Maximum Safety: The KPD system uses 36V/48V safe voltage rail power supply — unaffected by heat, impact, or cross-traffic, offering the highest safety level among electric flat cars.
Full Range Coverage from 2t to 150t: 13 specifications plus KPD/KPDS/KPDZ motor options, backed by specialized manufacturing expertise in heavy and ultra-heavy-duty electric flat cars.
Turnkey Service: From design to after-sales Maintenance, we provide full lifecycle support with immediate phone response.
Service & Support
Kelude Heavy Industry provides full lifecycle support for KPD series low-voltage rail electric flat cars, including rail design, installation, and commissioning. For additional model specifications and Quotation estimates, call 13903802779 or contact our online support — we respond within 24 hours.
FAQ
Q: What's the difference between the KPD low-voltage rail flat car and the KPXW trackless flat car?
A: The KPD is powered via a low-voltage rail, requiring track installation but eliminating battery charging — it's resistant to heat and impact, making it ideal for high-frequency transport on fixed routes. The KPXW trackless flat car runs on battery power with no track required, offering 360° maneuverability for flexible cross-workshop transport. For fixed-route, high-frequency operations, the KPD is the more economical and reliable choice.
Q: How do I choose between the KPD, KPDS, and KPDZ motor options?
A: KPD (two-phase 380V) is the cost-effective standard option for most conditions; KPDS (three-phase 380V) provides smoother operation; KPDZ (DC) offers smooth speed control and handles frequent start-stop cycles. Choose KPD for standard conditions, KPDS for smoother operation, and KPDZ for frequent start-stop applications.
Q: What are the requirements for the crane rail on a KPD low-voltage rail flat car?
A: The rail model is selected per the Technical Specifications (P15~QU100). The rail must be insulated from the ground and laid level. For operating distances exceeding 70m, a copper busbar compensation line is required. Use in open-air or water-accumulated environments is not recommended.
Q: What is the price range for a KPD low-voltage rail flat car?
A: KPD-2~10t models range from approx. 30,000 to 80,000 CNY; KPD-16~30t from approx. 80,000 to 180,000 CNY; KPD-40~63t from approx. 180,000 to 350,000 CNY; and KPD-80~150t from approx. 350,000 to 800,000 CNY. The price includes the flat car body and step-down transformer, but excludes rail installation costs.
