Som vi alle ved, er elektriske varmekabler opdelt i elektriske varmekabler med konstant effekt og elektriske varmekabler med selv-begrænsende temperatur, og elektriske varmekabler med konstant effekt er yderligere opdelt i elektriske varmekabler med konstant effekt og parallelle elektriske varmekabler med konstant effekt. varmekabler. Folk forveksler ofte disse typer elektriske varmekabler, og det er ikke klart, hvad forskellen er mellem de tre. Her forklares forskellen mellem serie- og parallelforbindelsen af elektriske varmekabler med konstant effekt og de selv-temperaturbegrænsende elektriske varmekabler.
1. Forskellen mellem seriekonstant effekt elvarmekabel og parallel konstant effekt elvarmekabel
1. The constant power electric heating cable in series cannot be cut, and the constant power electric heating cable in parallel can be cut.
2. The heating elements of the two are different: the series electric heating cable adopts nickel-chromium alloy wire (the metal bus inside is heated), and the parallel electric heating cable adopts nickel-chromium winding wire for heating (that is, the winding wire wound on the outside, the metal busbar inside to conduct electricity).
3. The parallel constant power electric heating cable is suitable for large tanks and pipelines with high temperature requirements and explosion-proof areas, and the series electric heating cable is suitable for long-distance pipelines such as oil long-distance pipeline heating and large-scale tank insulation.
2. Forskellen mellem det selv-begrænsende elektriske varmekabel og det elektriske varmekabel med konstant effekt:
1. Working principle
Selv-begrænsende temperaturvarmekabel: Når strømmen er tændt, aktiveres strømmen af en af ledningerne og føres til den anden ledning gennem PTC-kernen for at danne en sløjfe, og kernen med modstandsværdien opvarmes op.
Konstant strømvarmekabel: Når den isolerede ledning strømforsynes, passerer strømmen gennem varmetråden, og varmetråden genererer varme og overfører varme.
2. Structural differences
Self-limiting temperature heating cable: PTC polymer conductive material is filled between the two wires.
Constant power heating cable: The copper-nickel heating wire is wound around the insulated wire and connected to the insulated wire at a distance.
3. Use environment
Self-limiting temperature tracing cable: used in places where the environment is not very complicated and the temperature requirements are not high.
Constant power heating cable: suitable for occasions where the user environment is more complicated and the temperature requirements are higher.
4. Use effect
Self-limiting temperature heating cable: It can adjust its own heating temperature according to the ambient temperature.
Constant power heating cable: the temperature remains unchanged, the calorific value and power are constant, and the stability performance is relatively strong.