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A3 Group provides integrated monitoring systems for overhead lines. And our underground power cable switch are user friendly and include various application modules. These solutions greatly simplify control engineer's work. Our devices operate in networks with isolated, compensated and solidly grounded neutral.

For reliable power substations equipment operation we provide OLTC Position Monitors and OLTC Controllers. Our devices can work together with extremely large range of the On-Load Tap Changers and can be used anywhere. Using our devices, you can get position information and control OLTC electrical drives under automatic regulation of power transformers transformation ratio.

Our devices have European certificates of quality, and have passed tests for steady work in difficult conditions in Russian and Swiss laboratories. Our solutions realize technologies of the future to make your energy really reliable and effective.