Abstract
The most important elements of residual current devices are electromechanical relay, current transformer, and internal testing circuit. This chapter describes constructions and properties of these aforementioned elements. With regard to the electromechanical relay, two types of the relay—polarized and nonpolarized—are described. Differences in their principles of operation are highlighted. Magnetic properties of the current transformer are shown—mainly from the point of view of the pulsating DC current detection. A two-core residual current device for detection of AC, pulsating DC, and smooth DC residual currents is described. A configuration of the internal testing circuit of the residual current device is presented and this circuit coordination with various types of power supply is commented.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
