Catenary work is earthing work. Before anyone touches a contact wire the section has to be isolated, proved dead and earthed at the worksite — and the set that does it has to fit the conductor and the structure it is being applied to, from a position that is usually at height.
A substation earthing arrangement connects to a busbar or a conductor run that a person can reach from standing height. A catenary worksite is the opposite: the conductor is a contact wire and a messenger wire with droppers between them, carried on masts and portal beams, and the person applying the set is on a platform, a ladder or an elevated vehicle.
That changes the specification in three ways at once — the clamp has to suit the wire rather than a flat bar, the set has to be light and controllable enough to place at height, and it has to be applied and removed without the operator approaching the conductor with their hands.
The sequence is the sequence everywhere: the section is isolated at the feeding point, proved dead at the worksite, and then earthed and short-circuited before work starts. The difference in catenary work is that the earth is applied with an insulating operating rod, so the set and the rod are a single arrangement rather than a device and an accessory.
The set is quoted against the site, so it is worth stating the earthing point — running rail or return circuit — the conductor arrangement, and the height and access method the crew will actually be working from. Those three facts decide the clamp, the conductor length and the reach of the rod.
Conductor arrangement and the earthing point in use, the fault level at the worksite, the height and the access method, and the operating reach the crew needs. With those, the set is quoted against the point of work rather than against a catalogue number.
Because we manufacture the conductor, the insulation and the fittings, a specific clamp geometry or conductor length is a drawing question rather than a sourcing problem — which is what makes a catenary set workable on a network where the same set is never quite right for every location.
Portable 27.5 kV grounding set for railway high-voltage catenary work: three-section epoxy resin operating rod, high-purity bare copper conductor and a gooseneck hook that clamps onto the contact wire.
Telescopic high-voltage discharge rod for earthing and residual-charge discharge on de-energised circuits. Epoxy fiberglass pole, resistive discharge element and copper earth cable, supplied in 10 kV, 35 kV, 50 kV, 110 kV and 220 kV versions.
Acousto-optic voltage detector with self-test function and telescopic pole for live-line verification.
Epoxy resin folding shotgun-style insulated operating rod for live-line work, supplied in red and yellow.
35 kV high-voltage insulating rubber gloves for electric shock protection in power construction and live-line operations.
Vehicle-mounted manned elevating and rotating insulated platform for live-line work, combining a pole-mounted flat ladder, automatic tightening and hoisting for work at height on distribution lines.
Professional electrical safety FRP extension ladder, insulated combined design for power distribution and overhead line maintenance.
Copper personal-security earthing wire with a transparent sheath, supplied in matched voltage classes from 35 kV to 1000 kV so the lead, the cross-section and the voltage class always go together.
Send us your specifications — insulating mats, gloves, voltage detectors, grounding systems or safety tooling projects. Our engineers respond within 24 hours with technical recommendations and pricing.
