Električni grelni kabel s konstantno močjo uporablja grelno žico iz zlitine s konstantno izhodno močjo. Napajalni zbiralnik je dve (tri) vzporedno izolirani bakreni žici. Odporna žica je navita na izolacijski sloj, grelna žica pa je nameščena na določenih razdaljah (tj. dolžini grelnega odseka). Povezan je z zbiralko, da tvori neprekinjen vzporedni upor. Ko je zbiralka pod napetostjo, vsak vzporedni upor proizvaja toploto in tako tvori neprekinjen grelni pas. Ogrevalna moč električnega grelnega kabla s konstantno močjo se ne spreminja s spremembo temperature okolice in je konstantna vrednost. Električni grelni kabel s konstantno močjo ima konstantno kurilno vrednost na enoto dolžine, zanka električnega grelnega kabla pa mora biti opremljena s termostatom za spremljanje temperature.
The advantages of constant power electric heat tracing system are:
1. There is no starting current and the power is constant.
2. The maximum use length is long, the longest one-way use length can reach 300 meters, and the two-way use can reach 600 meters.
3. There is no attenuation, and the service life is about 3 years longer than the same conditions.
4. In terms of medium and long pipelines and large tanks, due to the long use length of the electric heating cable, the number of all circuits is small, and the total cost is low.
5. The calorific value is more stable than the self-controlling electric heating cable, and it focuses on active heating, not heating.
6. High temperature resistance grade, the highest constant power electric heating cable has a temperature resistance of 255 degree .
The defects of the constant power electric heating system are:
1. The nodes are not strong, and over time, the electric heating cable will have some non-heating conditions.
2. When temperature control is used in this method, the purchased components will be appropriately increased and the frequent activation of the thermostat will also affect the life of the thermostat, and the frequent inrush current will also disturb the entire electric heating cable route.
3. Once the thermostat fails, the electric heating cable will heat endlessly, so that the heated object reaches the highest temperature that it can accept. If it encounters dangerous goods, the consequences will be disastrous.
4. When the resistance wire is too long, it is easy to age, burn out, and possibly catch fire due to short circuit.
We are a professional manufacturer of constant-power electric heat tracing systems. We have many years of experience in the application of constant-power electric heat tracing cables. This product is used in many fields, including chemical, oilfield, industrial raw material refining and other winter pipeline insulation. , The advantages and defects are accumulated and summarized in practice, and we will continuously improve the performance of our products, do a good job in the brand image of the enterprise, and welcome customers to come and purchase.