Hefei over-voltage protection / over-voltage protection Hefei private DCB type modular overvoltage protector is single column SiC and MOA replacement products, mainly used in 35kV and below the power system, the protection of transformers, switches, buses, motor, parallel compensation capacitors and other electrical equipment, limit atmospheric over-voltage and various vacuum switch operation due to over voltage, phase and relatively reliable over-voltage can play a limited role. The product is unique and novel design, reasonable and reliable technical performance, parameter selection science, especially after using the modular structure, in the preparation of flexible manufacturing "phase - phase", "phase - ground" between the discharge voltage value, so more accurately limit "phase - phase" - between "relative to" over-voltage value. As a result of the combined, and each column are set with a gap D, it is in the discharge process, the discharge current at least two or more through the gap. The product is more or less advantage in the protection of high-voltage motors and other equipment: (1) the use of zinc oxide valve and the discharge gap combined structure, so that the two mutually protected. Discharge gap zinc oxide valve zero, the nonlinear rate charged zinc oxide valve action again immediately after the discharge gap extinction, extinguishing discharge gap no longer bear the task of improving the life of the product during operation under voltage conditions, actions oxide surge arresters without gaps longer than 5 to 30 times higher. (2) Voltage impact factor of 1, the discharge voltage value at the voltage waveform are equal, from a variety of operations applied voltage waveform, the value of accurate over-voltage protection, the protection of high-performance, multi-gap structure, reducing the the dispersion of the discharge, the protection value of accurate, compared with the conventional lightning arrester, white over-voltage decreases by about 50%, greatly improved the reliability of protection. (3) The product is made of fire-retardant, anti-aging silicone rubber housing materials made from silicone rubber interior leads to high-voltage cables and zinc oxide valve, so the electrical insulation properties, high dielectric strength, resistance to galvanic corrosion, anti-aging, without regard to phase distance and creepage distances, can be flexibly installed according to the site. 1.1 for indoor and outdoor; 1.2 ambient temperature:. -40 ~ + 40 ℃; 1.3 Altitude not more than 3000 m; 1.4 wind speed is not more than 35 m / s; 1.5 Power frequency not less than 48Hz, not more than 62Hz;... 1.6. Long-term applied to the protection of the power frequency voltage does not exceed its continuous operating voltage. South-South Hefei Hefei Power Equipment Co., Ltd ||| over-voltage protection / over-voltage protection of the private Hefei