#Inmr tool panel generator#

Tools, such as hooks or socket wrenches can be mounted at the end of the pole. With the advent of fibreglass poles in the late 1950s, which neither split nor soaked up rainwater, utilities were prepared to carry out hot-stick working to their highest operating voltages, perhaps 765В kV. As experience with the techniques developed, then the operating voltages at which the work was performed increased. The sticks enabled the linemen to carry out the work without infringing on the minimum clearance distances from live equipment. Hot-stick working appeared in the second decade of the 20th century, when insulating poles made from baked wood were used for tasks such as replacing fuses, replacing post insulators, and transferring lines onto temporary supports. Once this is in place, further work is not considered to be live-line working. To prevent this, the line is first grounded via a clamp known as a bond or drain earth.

#Inmr tool panel generator#

through a back-charged transformer, possibly as a result of an improperly connected, inadequately isolated emergency generator at a customer facility), or inductively coupled from an adjacent in-service line. This is because the line might become inadvertently charged (e.g. Unearthed or De-energised Some organizations additionally consider working on unearthed de-energised equipment to be another form of live-line working. Because the worker and the work are at the same potential, no current flows through the worker. Before contact, the worker's body is raised to the same electric potential as the live parts, and then held there by electric connection, while maintaining suitable isolation from the surroundings which are at different potentials, like the ground, other people or trees. Barehand or Potential The barehanded approach has a live line worker performing the work in direct electric contact with live parts. Insulating Gloves or Rubber Gloves A live line worker is electrically protected by insulating gloves and other insulating equipment, and carries out the work in direct mechanical contact with live parts. Tools can be attached to the stick, allowing work to be performed with the worker himself safely away from the live conductors. Hot stick or Live Line Tool Hot sticks are used in live line work by having the worker remain at a specified distance from the live parts and carry out the work by means of an insulating stick. In various ways, they all serve to prevent current flowing from the live equipment through the worker. In general, there are three methods of live-line working which help workers avoid the considerable hazards of live line working. Working under tension from an electrically insulating platform in a medium voltage network Such methods can be applied to enable safe work at the highest transmission voltages. In the 1960s, methods were developed in the laboratory to enable field workers to come into direct contact with high voltage lines.

The first techniques for live-line working were developed in the early years of the 20th century, and both equipment and work methods were later refined to deal with increasingly higher voltages. Although this is more hazardous for personnel than working on electrical equipment with the power off, live-line maintenance techniques are used in the electric power distribution industry to avoid the disruption and high economic costs of having to turn off power to customers to perform essential periodic maintenance on transmission lines and other equipment. In electrical engineering, live-line working, also known as hotline maintenance, is the maintenance of electrical equipment, often operating at high voltage, while the equipment is energised. A lineman wearing equipment for hot glove work