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Hl5w Polymer Housing Type Surge Arrester /Surge Protector (33kv)
HL5W 33KV Polymer Housing Type Surge Arrester Application Protection of medium/high voltage AC networks against both, multiple atmospheric and switching over voltages as well asVery Fast Transients (VFT). Suitable for the protectionof transformers, transformers in arc furnace applications, cables,generators,parallel to capacitor banks,and railway vehicles.Can be used mechanically as support insulator or as suspension insulator in case of application as line arrester For indoor and outdoor installation. Keystone The metal-oxide surge arrester (MOSA) is the most advanced over voltage protector in the word.Due to make the varistor of core com-ponent mainly adopt MOSA. Compared with the conventional silicone carbide arrester, this prescription of the product improves greatly the Voltage-Current(U-I)characteristic of the metal-oxide varistor and increased through-current capability at over- voltage so as to bring a radical-changes for the characteristic of the MOSA.
Underthe circumstanceof normal operating voltage, the current through the MOSA just on microampere degree. When suffered from over voltage,the MOSA's excellent non-linear characteristic will make the current through the MOSA increase to several thousand ampere,While the MOSA will be under the circulating state and release over voltage energy so as to protecting the power transmission equipments against the damage caused by the over voltage.
Usual service condition a) Ambient air temperature within the range of -55ºC to +50ºC. b) Altitude not exceeding 2000m. c) Frequency of the A.C. Power supply not less than 48Hz and not exceeding 62Hz. d) Power frequency voltage applied continuously between the terminals of the arrester not exceeding its continuous operating voltage. e) Maximum wind speed not exceeding 35m/s. f) Earthquake intensity not exceeding 7 degrees.
Technical Data of Metal Oxide Surge Arrester (Type: HL5W-3~18)