H02H3/402 - CPC Classification Index

ClassID:

216738 ⎘

H02H3/402 - CPC Classification

Classification description:

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 ratio of voltage and current using homopolar quantities

Recent Application in this class:

20160334469

2016-11-17

Phase and ground protection using tilt-limited adaptive quadrilateral characteristic

20130317768

2013-11-28

Voltage based method for fault identification in a transmission line apparatus thereof

20130043879

2013-02-21

Method and apparatus for detecting earth fault

20120330582

2012-12-27

METHOD OF HIGH IMPEDANCE GROUNDFAULT DETECTION FOR DIFFERENTIAL PROTECTION OF OVERHEAD TRANSMISSION LINES

20120206149

2012-08-16

Method and Apparatus for Ground Distance Protection

20110068803

2011-03-24

Electrical power system phase and ground protection using an adaptive quadrilateral characteristics

20100225329

2010-09-09

Load compensation in distance protection of a three-phase power transmission line

20100121594

2010-05-13

Method and system for estimation of source impedence on electrical distribution lines

20090309612

2009-12-17

Method and apparatus for determining circular characteristic

#10

20080239602

2008-10-02

Fast impedance protection technique immune to dynamic errors of capacitive voltage transformers

#11

20060152866

2006-07-13

System for maintaining fault-type selection during an out-of-step condition