How should the electric heater be connected to the tropical zone?

The electric companion tropics are made up of conductive polymers and two parallel metal wires and insulating layers. The cable is characterized by conductive polymer positive temperature coefficient has a very high, and parallel to each other, can be with the temperature change of the heating system automatically adjusts the output power limit, automatic heating temperature, can be arbitrarily truncated or inscribed in a certain range of long use, and allows multiple overlapping without high temperature hot and burned worry.

Since 1971 to enter the application, due to the change of temperature with thermal power with Langfang Huarui Electric Tracing Band throughout, semiconductor core material for a heating performance and high heating temperature / low reverse trend variable temperature resistance. The self limiting electric companion tropical zone has become the most common type of electric tropical zone in the world. They can be widely applied to the transportation of liquid objects in pipes, freezing and heat preservation of tanks, maintenance of technological temperature, heating of highways, ramps, crosswalk, eaves and flooring.

The semiconducting polymer material with heating effect is distributed between two conductive cores of the electric companion zone, the self limiting electric belt and the tropics, and the outer part is composed of a polymer sheath, an alloy shielding net and a polymer outer sheath. When the current is passed, the cable resistance increases with the increase of the tropical temperature. The result is that the output power of the electric companion in the tropical zone decreases with the increase of its temperature. Due to the change of temperature with thermal power with Langfang Huarui Electric Tracing Band throughout, semiconductor core material for a heating performance and high heating temperature / low reverse trend variable temperature resistance. The self limited electric tropical zone will not overheat even if it overlaps. No special design is needed. The self limiting electric belt can cut its working length arbitrarily on the spot to accurately correspond to the actual laying length of the pipeline, without special tools, and the installation is very simple.

The electric companion tropics are connected by the junction box during the installation process, not directly connected by the wire. The junction box of the electric belt is divided into three kinds, namely the three way junction box, the two way junction box and the terminal junction box, wherein the three terminal junction box and the two way junction box are used for the connection between the electric auxiliary zones, while the rear end junction boxes are used for sealing purposes.

Connection mode of two pass and three pass is the same, but the difference between the two is convenient and three cable connection, wiring cable is relatively simple, in the connection process do not need to distinguish between positive and negative, as long as some knowledge of electrical knowledge can be wiring and wiring method here is on the cable to do a simple introduction, hope for the installation and maintenance of your help.

The electric connection box is opened and the nut of the electrode terminal is unscrewed.

The two core wires in the tropics are placed on two electrode columns, the nuts of the electrode are tightened, and the pressure plate is pressed tightly with the core line of the tropics so that it can not be loosened.

Place the waterproof pad and cover board on the box and fix the nut.

The junction box should be well sealed with moisture-proof, waterproof, also need to avoid wire or wire line appears exposed situation.

The cable is divided into two kinds, one is heating with PTC conductive plastic, a fever with alloy wire, but the effect is the same, to the pipeline, equipment, tanks, instrumentation and other heating, heating by heat loss to meet the environmental temperature to bring its, to achieve the thermal compensation. So it is necessary to calculate the power of the required electric heat tracing according to the parameters of the field, that is, the calculation formula of heat loss.

According to the common sense, the highest maintaining temperature of the electric tropics must be higher than the temperature of the medium. Take the DN50 pipe as an example: when the heat dissipation per meter pipe is less than or equal to the steady-state power or rated power of the electric tropics, the ratio between the length of the electric tropics and the length of the pipeline is 1.1~1.2. If the heat dissipation per meter pipe is greater than the power of electric heating, then we need to do some calculation.

Two parallel electric tropics can be used, so the length of the electric tropics is the length of the pipe length *

A tropical zone can be twisted in proportion, so the length of the electric tropics is the length of the pipe.

The pipe fittings need to be reserved for a certain electric tropics, including the installation of electric heat tracing fittings.