SURFACE GROUND DEVICE Russian patent published in 2015 - IPC H01R4/66 H02B1/16 

FIELD: electricity.

SUBSTANCE: portable surface ground device is coupled to a power supply source of a mobile electrical installation and is comprised of a ground tank with a contact bolt and a load placed in its centre. The ground device has heating ground electrodes of a coaxial structure, which outer shells are insulated by a layer of heat- and moisture-proof varnish; the electrodes are placed in a case sealed with a heat insulated polyurethane coating and protected with a glass-reinforced plastic jacket. The case is equipped with a heat concentrator and a resistance sensor connected to an electronic stabiliser of current-spreading resistance.

EFFECT: reduction and stabilisation of current-spreading resistance and provision of the reliable and safe operation of equipment and maintenance personnel in the winter period in conditions of extremely low temperature and perpetually frozen soils.

1 dwg