• All sections
• H - Electricity
• H02H - Emergency protective circuit arrangements
• H02H 3/33 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers

Patent holdings for IPC class H02H 3/33

Total number of patents in this class: 453

10-year publication summary

Principal owners for this class