As the equipment is operated by means of the trucks engine there is no need for electricity. Methods[ edit ] In general, there are three methods of live-line working which help workers avoid the considerable hazards of live line working.
Hence, auto-reclosing equipment is rendered inoperative while live working takes place. This is a set of overalls made from or woven throughout with conducting Hot line maintenance. Class 1 - phase to phase working voltage 7.
Available around the clock, our maintenance hotline can be used as a single point of contact for all your maintenance requests, or as an after-hours solution that takes over for your office staff. Hot stick 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 fusesreplacing post insulators, and transferring lines onto temporary supports.
At a sufficient distance the jet moves in the form of small particles separated by air ,and the water path is not continuous. Providing redundancy in transmission lines could be a solution, which, however is a costly option.
Water with conductivity of micromhos or less per cc is used for washing purposes up to KV. To prevent this, the line is first grounded via a clamp known as a bond or drain earth. Hence normal lake or river water or treated municipal water that has a conductivity of 90 to micromhos can be used.
Advanced database functionality In addition to creating work orders within your existing software, our maintenance hotline can be programmed to interact with databases, allowing us to customize scripting and message delivery instructions based on specific properties.
Once this is in place, further work is not considered to be live-line working. Complete work order management CMS maintenance call center services are personalized to the needs of your property management company and can often integrate with existing software. So whether you have one property or one thousand, our system can be setup to effectively manage all your calls and route them accurately based on your specific instructions.
The worker is lowered from a helicopter and transfers himself to the line. For safety, leakage current in the water jet and nozzle is continuously monitored by means of a special detector, designed and made by Yashmun.
Barehand working provides the lineman with greater dexterity than the hot stick method, and may be the preferred option if conditions permit it.
Wearing the suit, they can crawl down the wires. As experience with the techniques developed, then the operating voltages at which the work was performed increased. There are other requirements for safe working such as gradient control devices, a means of preventing a vacuum in the hydraulic lines, etc.
Avoids tripping of the line due to contamination of the insulator. Government regulations may regulate conditions for live working conditions. From small privately owned complexes to nationwide commercial property management firms, CMS supports hundreds of property management companies nationally.
Therefore preventive maintenance, deploying live line maintenance techniques, proves the best solution. Covers of insulating material such as blankets and linehose are employed in rubber glove working to protect the worker from exposure to a part at a different potential sometimes referred to as the 2nd point of contact; the point where current would leave the body should an inadvertent contact be made.
Because the worker and the work are at the same potential, no current flows through the worker. Requests that require immediate attention can be dispatched to on-call personnel; non-urgent requests can hold for regular office staff.
An electric field surrounds all charged devices. Agents can field calls, create work orders in your system, and then notify the appropriate personnel.
This is the principle behind the Yashmun method of Hotline Washing. Rorden, a high-voltage engineer for American Electric Power. Please contact us using the information below. This equipment has been developed for the washing of Transmission line towers up to KV.
A ltr water tank is placed on another trolley. Barehand or Potential The barehanded approach has a live line worker performing the work in direct electric contact with live parts.
M water is recommended. Operating Principle Whenever a jet of water is released in the air, the water particles split due to resistance. Bare hand[ edit ] Bare-hand, or potential working involves placing the worker in direct electrical contact with an energized overhead line.
Additional property management services. At high voltages, it is unnecessary to come into direct contact with charged equipment to be shocked. A log daily of all after-hour activity highlights the response time for each call and ensures on-call maintenance personnel are handling the emergencies as you have instructed them.
Once on the line, the worker is safe from shock as both the lineman and the wire are at the same electric potentialand no current passes through his body. Tools can be attached to the stick, allowing work to be performed with the worker himself safely away from the live conductors.Improve facility maintenance and communication with a centralized maintenance hotline.
Maintenance call center services are customized for your needs. Ideal for property management companies. Lustree Engineering offering Hot Line (Live Line) Maintenance, EHV Sub-Station washing in Live Line condition, Live Line washing of KV, KV, KV Tower Line insulator,Hot spot attending the EHV sub-station,Power Transformer revamping at.
Hotline Washing and Maintenance Hot Line Washing is a process of cleaning of insulators with the help of DM water /normal water, conductivity below Micr0-mh0s, under live condition, without asking for shut down.
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. 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.
Applications of Hot Line method. 1) Testing of punctured insulator. 2) Replacement of disc insulators. 3) Tightening of Nut bolts of power connectors.
Live-line maintenance has been made possible by the development of special tools and procedures for such work. Under live-line maintenance, a great variety of work is included. The most common of these live-line operations are as follows: .Download