216727 ⎘
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
Sub-classes:VOLTAGE-BASED DISCONNECTION OF ELECTRICAL VEHICLE SUPPLY EQUIPMENT
#2Protection circuit for a three-phase power supply system
#3CIRCUIT INTERRUPTING DEVICE FOR PROVIDING GROUND FAULT AND OPEN NEUTRAL PROTECTION IN TEMPORARY POWER APPLICATIONS
#4Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
#5Electronic switching protection apparatus
#6Common mode voltage feed fault protection
#7Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
#8Sensor, circuit breaker, charging cable and charging station
#9Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
#10AC-AC converter with open phase detection based on second harmonic
#11Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
#12Apparatus, power supply, method and recording medium to determine a state of a three-phase AC power supply using instantaneous voltages of three phases of the AC voltage
#13Circuit breaker and method for emitting a warning upon a threshold being exceeded
#14PHASE COMPENSATION SYSTEM
#15Methods and systems for open-phase detection in power transformers
#16Safety detection device and method of grid-connected inverter
#17Method in, apparatus for, and interface arrangement between an alternating current power system and a direct current power system
#18Electrical protective device and method for selective disconnection of a subsystem in case of a second fault in an IT power supply system
#19System for monitoring battery provided in vehicle
#20Switchgear for a single-phase motor and a three-phase motor
#21Asset condition monitoring in an electric motor
#22Methods and Systems Involving Monitoring Circuit Connectivity
#23Method of fault phase selection and fault type determination
#24METHOD AND SYSTEM FOR TRANSIENT AND INTERMITTENT EARTH FAULT DETECTION AND DIRECTION DETERMINATION IN A THREE-PHASE MEDIAN VOLTAGE ELECTRIC POWER DISTRIBUTION SYSTEM
#25Electric power conversion system and electric power conversion device
#26System and method for detecting a fault condition
#27Faulted phase decision method between current and voltage based delta phase selectors
#28Device and method for detecting faulted phases in a multi-phase electrical network
#29Ground fault interruption using DSP based SSPC module
#30Line filter
#31High level arc fault detector
#32Network primary feeder self protected transient limiting device
#33Multiphase ground fault circuit interrupter
#34Detection and protection of power phase loss and neutral failure