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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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