Electric water heater electrical parts type and function
The tubular electric heating element is composed of a metal tube, a spiral resistance wire, and a crystalline magnesium oxide powder having good thermal conductivity and good insulation. The material of the pipe body mainly includes stainless steel, copper, enamel pipe body and the like. The main function is to heat the heating through the resistance wire.
1: Appearance requirements: clear marking, good welding, no obvious deformation, cracks, poor contact.
2: Insulation: Add 1800V voltage between the resistance wire and the outer tube, test 3S, ≥20MΩ
3: Withstand voltage: no flashover breakdown at 1500V/5mA/1min or 1800V/5mA/3s