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Switch i.e. low voltage circuit breaker, has power source including current transformer with iron core having winding formed from diamagnetic materials so that large short-circuit current flows through electrical resistor of winding
Switch i.e. low voltage circuit breaker, has power source including current transformer with iron core having winding formed from diamagnetic materials so that large short-circuit current flows through electrical resistor of winding
The switch has a current sensor to detect current through a conductor. An electronic trip unit triggers an opening of the switch when the detected current exceeds a threshold value. The trip unit is supplied with operating current from a power source comprising a current transformer with an iron core having a winding, where the power source is connected with the trip unit over lead lines. The winding and/or lead lines are formed from diamagnetic materials so that magnetic field of the conductor is arranged to flow a large short-circuit current through an electrical resistor of the winding.
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