216778 ⎘
Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers Differential protection of transformers
Sub-classes:HIGH-SPEED HIGH-SENSITIVITY TRANSFORMER DIFFERENTIAL PROTECTION USING ENHANCED RESTRAINING TECHNIQUES
#2PROTECTIVE RELAY DEVICE
#3Restricted earth fault relay
#4HIGH-IMPEDANCE DIFFERENTIAL PROTECTION USING A DIVERSITY OF SIGNALS
#5Transformer overcurrent protection
#6Secure and dependable restricted earth fault protection for electric power generators and transformers
#7System and method for differential protection under geomagnetically induced current
#8Differential protection determination method
#9Circuit for reducing fire hazard risk in a power distribution network
#10Longitudinal differential protection method of transformer
#11Current transformer
#12Methods and devices for calculating winding currents at a delta side for a transformer
#13Overexcitation protection for electric power system equipment
#14Method and control device for current differential protection
#15Apparatus and method for detecting disconnection in secondary side of current transformer
#16Residual current detecting (RCD) and ground impedance monitoring transformer and control methods
#17Residual current detecting (RCD) and ground impedance monitoring transformer and control methods
#18Differential protection method and differential protection device for a transformer
#19Systems and methods for detecting turn-to-turn faults in windings
#20Systems and methods for detecting turn-to-turn faults in windings
#21Device and method for reducing a magnetic unidirectional flux component in the core of a three-phase transformer
#22Prevention method of abnormal action protection of UHV regulating compensation transformer with no-load input
#23Method for detecting fault and current differential protection system thereof
#24Power transformer inrush current detector
#25Differential protection method in an electrical power supply system and protective apparatus for carrying out a differential protection method
#26Frequency-conversion differential protection method for output transformer of static frequency converter system
#27MAGNETIZING INRUSH CURRENT DETECTION METHOD, MAGNETIZING INRUSH CURRENT RESTRAINT METHOD AND DEVICE
#28Magnetizing inrush current suppression device
#29Differential protection in electrical power networks
#30Method and an apparatus for supervision of current transformer in a differential protection system
#31Method and apparatus for differential protection of an electric connection
#32Transformer differential protection
#33System and method for preventing, protecting OLTC from fire and/or transformer from explosion
#34Continuous condition monitoring of transformers
#35Negative sequence differential element
#36Transformer through-fault current monitor
#37Method and device for fault detection in an N-winding three-phase power transformer
#38Method and device for prevention and protection of electrical transformer against explosion and fire
#39Method and device for fault detection in transformers or power lines
#40Apparatus and method for providing differential protection for a phase angle regulating transformer in a power system
#41Apparatus and method for compensating secondary currents used in differential protection to correct for a phase shift introduced between high voltage and low voltage transformer windings
#42Compensated current differential relaying method and system for protecting transformer
#43Circuit protection system
#44Method and an apparatus for supervising the operation of current transformers