It's Time For Cables To Be Protected From Freezing In Winter!

 Winter is cold and snowy, and for some places around the world where it often snows and is cold, wire and cable overhead outdoors, the surface is easily covered with snow and ice.

When the weight of the ice layer exceeds the capacity of the wire and cable, it is easy to cause the cable to collapse.

This will be transmission towers, and poles pulled down, but also prone to the phenomenon of cable collapse.

So how should we avoid the above things from happening? What are the cable anti-freeze measures?

The following ZMS cable team will take you through these methods, which will apply to both industrial and domestic use.

 

Freezing Rain And Its Defensive Measures

The Formation Principle Of Freezing Rain

Freezing rain is a weather phenomenon commonly seen in early winter or late winter and early spring, and is a kind of catastrophic weather.

When stronger cold air moving south meets warm and humid air currents, the cold air is inserted like a wedge underneath the warm air.

The temperature in the near-earth layer plummets below zero, and the moist warm air is lifted and becomes clouds causing rain.

When raindrops fall from the sky, due to the low temperature near the ground, the poles, trees, vegetation, and road surface will freeze on a layer of crystal clear thin ice, meteorological this weather phenomenon is called "freezing rain".

The picture shows that the cable is covered with ice during freezing rain.

This type of rain falls from the sky as cold drops of water below 0°C.

When the rain falls from the sky and freezes, the accumulation of this ice to a certain extent is not only harmful but also harmful.

Dangers Of Freezing Rain

The scenery of freezing rain is worth watching, but it is, after all, a kind of catastrophic weather, and the harm it causes cannot be ignored. After the wire freezes, the cold contraction, coupled with the impact of the weight of the freezing rain, will be taut.

Even rows of poles are pulled down so that telecommunications and power transmission are interrupted.

Road traffic is blocked by icy ground, and traffic accidents increase as a result.

The thickness of freezing rain can generally reach 10 to 20 mm, with the thickest being 30 to 40 mm.

Freezing rain is a kind of catastrophic weather, which can crush electric cables and telephone lines after accumulating large amounts of freezing, and severe freezing rain can also collapse houses.

When aircraft fly in clouds with super cold water droplets, the wings and propellers will accumulate water, affecting the aerodynamic performance of the aircraft and causing crashes.

Prevention Of Freezing Rain

When freezing rain occurs, it is necessary to promptly knock and scrape clean the accumulated ice on wires and cables, electric poles, and pylons.

For the accumulation of ice on the highway, timely sprinkle salt to dissolve the ice, and organize manpower to sweep the road.

In the freezing rain, people should try to reduce going out, if you go out, take cold and warm and anti-skid measures.

Pedestrians should be careful to stay away from or avoid motor vehicles and non-motorized vehicles.

Drivers should slow down in freezing rain, not overtake, accelerate, make sharp turns or emergency braking, and should install tire anti-skid chains in time.

 

Cable Prevention

1 Choose The Cable That Can Withstand The Cold

As snow and ice fall on the cable and in the gaps between the cables, the center of gravity of the cable tends to be biased toward the part with snow.

This creates a force that causes the cable to rotate, and the snowball then rolls bigger and bigger, eventually causing the cable to break.

So generally speaking cable rotation is the main cause of cable breakage.

At the same time, due to the different hardness and density of the cable, when the snow gradually solidifies into ice, it will automatically break up to a certain extent. So, for this kind of situation, there are new high-voltage overhead cables in recent years.

 

2 Cable Packaging Transportation And Storage

● When the product is loaded onto the transportation means from the factory, it needs warmth and protection measures.

There are many ways to prevent the cable from freezing and icing.

For example, use a closed transport tool to prevent the product from being directly exposed.

● Put a soft cushion such as bedding or foam on the product.

● Load the cables gently and do not load them roughly to avoid bending the products.

● Apply an anti-freeze coating to the wire and cable.

Antifreeze coating is a high-temperature insulating thermal insulation coating or reflective thermal insulation coating designed to protect against frost through thermal insulation.

● When storing cables, try to store the product indoors and also take care to prevent direct contact between the product and the ground.

Lay a layer of isolation layer on the surface of the storage, such as wooden boards, bedding, foam, etc., to avoid the phenomenon of scratching the outer skin of the cable.

 

3 Pay Attention To The Cable Laying Process

When laying the underground XLPE cable, try to choose the operation in the mid-afternoon when the temperature is warmer.

If the conditions can be used before using the cable with equipment such as heaters to "warm up" the product in advance so that the product achieves a better performance state.

If it is buried, you can first lay a layer of protection in the cable trench, such as fabric, foam, etc.

If it is through the tube, ensure that the inner and outer walls of the line pipe are smooth, so as not to scratch the cable.

Pay particular attention to the iron pipe, because the poor quality of the iron pipe may have a large number of sharp raised points inside, which may scratch the outer skin of the wire.

Resulting in the future use of the process being susceptible to environmental influences moisture, and frozen conditions, affecting the use of cable.

 

The above is the content of the "cable frost protection measures" introduction.

In general, cable frost protection from cable selection, cable transportation and storage, cable laying, and other aspects, in order to prevent the cable from freezing, affects the cable laying and use.