Overhead Line Fault Indicator Installation Tool The Best Conductivity, Mechanical Strength Is Also High, Good Corrosion Resistance
Overhead Line Fault Indicator Installation Tool mainly by the wire, lightning lines (ie overhead ground), towers, insulators and fittings and other components.
Wire and lightning line: the role of the conductor is to conduct current, transmission of electricity; lightning line is the role of lightning current into the earth to protect the power lines from lightning.
Wire material: the requirements of small resistivity, mechanical strength, light weight, easy to corrosion, cheap, low operating costs, commonly used materials are copper, aluminum and steel.
The advantages of aluminum stranded wire is light weight, low price, the disadvantage is the wire performance than copper, mechanical strength is low, easy to form the surface of the operation of alumina film, the contact resistance of the joints increased.
In the load larger, high mechanical strength requirements and 35kV and above Overhead Line Fault Indicator Installation Tool, the use of LGJ-type steel core aluminum wire, used to enhance the mechanical strength of the wire. Aluminum is a carrier fluid.
Copper wire has the advantage of the best conductivity, mechanical strength is also high, good corrosion resistance, but the density, expensive.
As the site wind speed exceeds or close to the design of wind speed, causing the tower to a permanent grounding accident, or because of the gap between the electric gap caused by the wire to the tower components, wires and wires, wire to ground, wire and other objects on the flashover failure.
a) Wire discharges the tower components. Insulator string in the horizontal wind load caused by wire swing, resulting in wire and tower between the air gap to reduce the formation of single-phase ground short-circuit fault.
b) resistance to the stem tower in the phase of the jumper on the tower discharge. Due to the construction of the jumper is too long or jumper single hanging point in the role of the wind around the swing and other reasons, resulting in jumper air gap formed by the formation of single-phase short-circuit fault.
c) the wire discharges the surrounding objects. Transmission line conductor in the horizontal wind load under the wire swing, so that both sides of the conductor with the building (structure) or slope, bamboo and other air gap to reduce the formation of single-phase discharge ground fault.
d) discharge between wires and wires. The distance between the wire wings is different, so that the gap between the wires to reduce the formation of the two-phase short-circuit fault; another wire arrangement in the front and rear file changes, prone to ground to the wire Or wire inter-phase discharge.
Overhead Line Fault Indicator Installation Tool can be intelligent, and is an important component of intelligent distribution network, which features can be sensing it? The first is the conventional secondary equipment commonly obtained line voltage (or electric field) and current, both including its steady-state power frequency components, including its transient high-frequency components; followed by the mechanical characteristics of the line such as displacement acceleration, geographical location, Tolerance and other dynamic behavior; and its environmental changes such as temperature, sound, images and so on. What are the intelligent imaginations that we can do for Overhead Line Fault Indicator Installation Tool when we have these behavioral data? Capacity management, load deployment, power outage perception, short circuit fault handling, of course not to mention; ice perception, sag monitoring and other manual inspection content to state inspection will not be a problem; even if the transient current accuracy is not high enough, scratch head single-phase ground , Single-phase disconnection, arc grounding and other difficult problems can easily locate. Therefore, the functional era of overhead-type fault indicator to the overhead line of intelligent sensing direction of evolution.