216728 ⎘
Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; 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 of a three-phase system using phase sequence analysers
Protection of low-voltage distribution networks
#2Method and apparatus for detecting vector shift
#3Method and system for identifying full parameters of element by fault recording and fault locating method
#4Switchgear for a single-phase motor and a three-phase motor
#5Differential protection in electrical power networks
#6Supply voltage auto-sensing