Earthing devices

Earthing devices


An earthing device defines a mechanical assembly used to achieve an electric circuit which perform an temporary connection of the conductors of the power networks with the ground. The mounting of the short-circuiting devices represents the main preventive measure to protect personnel against electric risk, in case of accidental occurrence of voltage at the working place. This working procedure must be carried out by two workers, in the following sequence of operations: a) Earthing the device, which is achieved by firm fixing of its earthing clamp to the artificial / natural earth grounding of the electrical installation or to the earthing rod, previously buried. b) Checking the absence of voltage on the conductors, using a voltage detector (eventually fixed on the coupling system of an appropriate insulating stick) c) Applying the phase clamps to the phase conductors, which assure a temporary electrical connection between the conductor and the earth. Depending on the type of the short-circuiting device and the voltage of the installation, this operation must be performed using appropriate insulating sticks or handles. The dismantling of the short-circuiting device should be performed in the reverse order. The earthing devices are manufactured in accordance with the standard SR EN 61230 and can be applied in indoor and outdoor electrical installations. The earthing devices can be single phase or poly phase (usually three phase) types. The earthing and short-circuiting cables are stranded type, made of copper, very flexible, class VI, according to the standard EN 60228:2005 and are protected with an insulating cover from transparent plastic material, directly extruded on the copper core strands, according SR EN 61138 standard. The phase and earthing clamps are specially designed and manufactured in a wide variety of structural forms in order to be easy and firm applied on various types of conductors of LV, MV or HV power networks.

    • Low voltage
      The short-circuiting devices for low voltage electrical installations are manufactured in different variants adapted to different types of LV installations: - Overhead lines with non-insulated conductors; - Overhead lines with insulated conductors; - Transformer substations, LV panel boards, LV distribution boxes.
    • MV overhead lines
      The three-phased short-circuiting devices for medium voltage overhead lines are manufactured in different types in order to offer the possibility of mounting the phase clamps from the ground or from the pole.
    • HV_MV transforming substation
      The single-phased mobile earthing devices for stranded flexible conductors, round bars, "T" and "Tr" special pieces or fix couples derivation type from the transforming substations are made in several types in order to provide an ergonomic application of the phase clamps on these round type conductors.
    • Railways
      The single-phased earthing devices for the railway installations are made in two types, depending on the mounting conditions. The earthing devices are provided with special clamps for connection to the third rail of the subway installations, to the railway contact line and to the rails.
    • Electric motors
      The short-circuiting devices for electric motors of 0,4 or 6 kV are used in intervention works at their terminals in order to earth the terminals or motor power cables, to prevent electrocution accidents.
    • Miscellaneous accessories
      The accessories for the short-circuiting and earthing devices are used along with the devices or in order to preserve them in good condition.
    • Phase clamps _ earthing clamps
      The phase clamps and the earthing clamps are the main parts of the short-circuiting and earthing devices. The phase clamps directly connect the short-circuiting and earthing devices with the conductors / bars of the electrical installations needed to be earthed or at other contact pieces from these bars. The earthing clamps directly connect the short-circuiting and earthing devices at the natural / artificial fix earthing systems of the electrical installation or at the mobile earthing rod (the short-circuiting and earthing peg). Both the phase clamps and the earthing clamps are certified a... Read more...

Earthing device for LV insulated overhead lines

Earthing device for LV insulated overhead lines

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Earthing device for LV bare overhead lines

Earthing device for LV bare overhead lines

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Earthing and short-circuiting device for LV panel boards

Earthing and short-circuiting device for LV panel boards

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Single phase earthing device for round conductors

Single phase earthing device for round conductors

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Shunt for LV overhead lines, with non-insulated conductors

Shunt for LV overhead lines, with non-insulated conductors

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Universal earthing device for LV overhead lines (insulated and bare conductors)

Universal earthing device for LV overhead lines (insulated and bare conductors)

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Short-circuiting device WBT type for piercing clamps – ENEL model

Short-circuiting device WBT type for piercing clamps - ENEL model

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Voltage connector COT 10-95

Voltage connector COT 10-95

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Coupling adaptors at DPS connectors

Coupling adaptors at DPS connectors

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