Depot areas tend to have only a single wire and are known as “simple equipment” or “trolley wire”. When overhead line systems were first conceived, good current collection was possible only at low speeds, using a single wire. To enable higher speeds, two additional types of equipment were developed:
- Stitched equipment – uses an additional wire at each support structure, terminated on either side of the messenger/catenary wire.
– Compound equipment – uses a second support wire, known as the “auxiliary”, between the messenger/catenary wire and the contact wire. Droppers support the auxiliary from the messenger wire, and additional droppers support the contact wire from the auxiliary. The auxiliary wire can be of a more conductive but less wear-resistant metal, increasing the efficiency of power transmission
Overhead wires are used to transmit electrical energy to trams, trolley buses or trains at a distance from the energy supply point. Electric trains that collect their current from an overhead line system use a device such as a pantograph, bow collector, or trolley pole. The device presses against the underside of the lowest wire of an overhead line system, the contact wire. We manufacture this contact wire usually known as HDGC (Hard Drawn Grooved Copper) contact wire through imported high accuracy five stage drawing machine with PLC controls and computer interface. Being an approved Indian Railway source of HDGC wire supplies, we are also able to cater to the various urban metro rail requirements and typical trolley ropeway overhead requirements.
Product Range and applicable standard
Up to 200 sq mm cross section area and as per IS, ASTM, EN standard.