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The latest development of HHIB – RSV 12

As part of the continuous process of expanding the HHIB product range of On Load and Off Load Tap Changers and improving their technical parameters and performance our latest tap changer enters serial production:


  •  Switching operations till inspection – 300 000


- Switching operations till replacement of vacuum interrupters – 800 000
- Switching operations (mechanical endurance) – 1 200 000

Compact size

Wide range of applications - single-phase; star and triangle connections

The latest development in HHIB RSV series of OLTCs with vacuum interrupters, the RSV12, brings the series to completion – now all our oil-type OLTCs have a vacuum-based equivalent.  The RSV12 is designed to operate with single-phase power transformers and three-phase transformers with D (triangle) and Y (star) connected windings. It is a cost-effective and low-maintenance solution that can substitute a set of 2 or 3 tap changers in your transformer. Built to meet and exceed the requirements of IEC 60214-1:2014, the RSV12 has a compact design with a separate oil compartment. RSV12 meets all clients requirements and withstand the worst tests and exploitation conditions.   

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