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Type CM is a classic on-load tap changer composed by diverter switch & tap selector. It covers the widest application range from small power up to large power transformers. After a long history of operation and modifications, today type CM is one of the most reliable tap changers, which is able to withstand heavy duty with over 1,000 daily operations in furnace application.
Type CMD is designed with state-of-the-art technology and concept. Its unique contact system ensures superior performance for carrying heavy load and enduring short circuit current. In large power and ultra high voltage transformers, Type CMD is the natural choice to achieve high reliability.
Type CV is a typical selector switch structure tap changer, an ideal solution for medium power transformers (up to 110kV) down to distribution transformers. Its compact size allows transformers designers to achieve the most optimal tank design.
Type CVT is an air-insulated tap changer of selector switch design. Its compact size fits well for distribution transformers up to 11kV system. In various highly populated sites or critical facilities, such as urban high rises, airports, etc., CVT is widely applied for fire-proof and low maintenance purpose.
Type CZ is an air-insulated tap changer with separate diverter switch and tap selector. Today it is the only on-load voltage regulation solution for dry type transformers of 66kV system. In various highly populated sites or critical facilities, such as urban high rises, airports, etc., CZ is an ideal fire-proof and low maintenance solution.
Type CV2 is of selector switch structure, a vacuum version of type CV on-load tap changer. Its mechanical backup contacts design introduces an innovative & practical concept to make both low maintenance and extreme reliability possible at the same time. Furthermore, it is the most economic solution for primarily-delta transformer up to 132kV system.
Type CM2 on-load tap changer perfectly integrates the proven reliability of type CM and vacuum switching technology. Completely same dimension not only saves the transformer designers from re-designing the transformer for vacuum technology, but also provides a direct retrofit diverter switch for existing tap changer upgrade from conventional to vacuum tap changer.
Type SHZV is a vacuum version of type CMD on-load tap changer. In addition to the features & advantages inherited from CMD, it is designed with an extremely robust and big capacity diverter switch, makes it a natural choice for low maintenance desiring high voltage power transformers applications.
Type HWV externally-­mounted vacuum OLTC is a new vacuum tap changer developed by Huaming. It is composed of diverter switch, tap selector, oil tank and motor drive unit. The diverter switch and tap selector of HWV is consolidated in one oil chamber. iT is suitable for power and industrial transformers of Star or Delta connection. Its highest equipment voltage is 40.5 and 72.5kV; its three phases current is less than 1200A and rated frequency is 50 or 60 Hz.
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