SP series PC power maintenance box is in line with relative IEC standards. which is for electrical network(50-60Hz, Voltage not higher than 660V). At the same time, they are with circuit protection like overload. short circuit and current leakage and provide the power outlets for electrical equipments.
These boxes are wildly used in oil themical industry, metallurgy, power plants, coal mines, machinery, textile, ports, docks and other industries ,Specifically for maintenance in the tunnel range of rail transit.
Enclosures are suppressed by Special synthetic material(PC)in one time which has the sum of features: high hardness, stable size, good insulation, good thermal stability and chemical stability(resistant mineral acids. carbohydrates, saturated fat, petrol, fats and oils erosion stability), flame retardant(the material is non-flammable and it can be self-extinguishing after combustion fire). Since it does not contain halogen, combustion, there would be no vapors which would cause acid rain orrosion when burned. Otherwise. boxes are ofilled with foam seals and up to IP67 according to EN(European Committee for Standardization) standard 60529/10.91, impact rating IK09, long service life.
They are designed with transparent windows which is convenient and safe for operation. No need to open the doors.