Double Hook Copper Contact Wire
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Mobile equipment needs to constantly change positions due to movement, and at each different position, it must be able to obtain power supply at any time, otherwise it cannot continue moving. This is when the contact wire system comes into play. Several conductors are laid parallel along the track of the mobile equipment and connected to the power supply. On the moving equipment, a current collector is installed that can draw power from the conductors. When the equipment moves, the current collector moves synchronously with the equipment, continuously obtaining power from the conductors to supply the equipment, allowing it to keep moving. The device composed of these conductors and current collectors is called a contact wire system..
The power supply contact wire system consists of three main components: the protective cover, conductors, and current collectors, along with some auxiliary components.
1. Protective cover: It is a semi-enclosed tubular component and the main part of the contact wire system. Inside, 3-16 bare guide rails can be embedded as power supply conductors as needed, with each rail insulated from the others to ensure safety of power supply. It also effectively prevents electric shock accidents during live maintenance. The length of each conduit produced by the manufacturer varies, and they can be connected to any required length. Standard conduits are made straight, but can also be made into arc shapes or other special shapes according to specific requirements.
2. Conductors: The main material is copper, with common cross-sectional areas of 10 mm², 16 mm², and 25 mm².
3. Current collector: It is a set of brush housings that run inside the conduit, driven by a fork (or traction chain, etc.) installed on the electrical mechanism (such as a crane, trolley, electric hoist, etc.), allowing it to move synchronously with the mechanism. It transfers electrical energy from the guide rails through the brushes to the motor or other control elements. The number of poles on the current collector brushes ranges from 3 to 16, corresponding to the number of poles on the guide rails in the conduit.
(2) Product Features
1. Safety: The housing of the power supply contact wire is made of engineering plastic with high insulation performance. The protection level of the housing can reach IP13 or IP55 as needed, protecting against rain, snow, ice, and contact with hanging objects. The product withstands various environmental conditions. Its insulation performance is excellent, and it poses no harm to maintenance personnel touching the outside of the power transmission conduit.
2. Reliability: The power transmission guide rails have excellent conductivity, dissipate heat quickly, have high current density, low impedance, and low line loss. The brushes are made of metal graphite material with high conductivity and high wear resistance. The current collector moves flexibly with good directional performance, effectively controlling contact arcs and flashover.
3. Economy: The power supply contact wire system has a simple structure, using copper busbars with high current density, low resistivity, and low voltage drop as the conductive main body. It can save about 6% of electricity, and uses plastic instead of steel and copper in some parts. The design is innovative, requiring no additional insulation structure or compensation wires. It is installed on the same side as the crane control room, saving installation materials and costs. Its overall cost is roughly the same as that of bare steel contact wires.
4. Convenience: The power supply contact wire system integrates multiple busbars into a single conduit, making assembly simple. Its fixing brackets, connecting clamps, and suspension devices are supplied as universal parts, making installation, disassembly, adjustment, and maintenance very convenient.
Note: The above information and technical parameters are compiled and published by Yangzhou Darui Electric Co., Ltd.
