Power system cables It is reported that wires and cables have become an indispensable part of the modern development of urban economic construction. Many people will include the type and amount of cables in the design and cost calculation technology. for
For social and public safety and environmental protection, fire-resistant cables and fire-resistant cables are also frequently used in many places, so how to distinguish them?
Fire-resistant cable: The technical performance is that it burns at 750°C and 800°C for 3 hours without breakdown at rated voltage.
Fireproof cable: Also known as mgo mineral insulated cable, or mi cable, is made of copper core, copper sheath and mgo insulation.
The cable has the characteristics of high fire resistance, high temperature resistance and mechanical damage resistance. The long-term use temperature is 250°C, and it can be maintained at 950 ~ 1000°C (international standard 90 minutes) for 3 hours. The melting point of copper can be maintained in a short time or an extraordinary period
close to 1083°C. But the cost is slightly more expensive, and it does not have the flexibility of ordinary cables.
