Transcription of FUNDAMENTAL RELAY-OPERATING PRINCIPLES AND …
{{id}} {{{paragraph}}}
Example: biology
FUNDAMENTAL RELAY-OPERATING PRINCIPLES AND …
14 FUNDAMENTAL RELAY-OPERATING PRINCIPLES AND CHARACTERISTICS14 FUNDAMENTAL RELAY-OPERATING PRINCIPLES AND CHARACTERISTICS2 FUNDAMENTAL RELAY-OPERATING PRINCIPLES ANDCHARACTERISTICSP rotective relays are the "tools" of the protection engineer. As in any craft, an intimateknowledge of the characteristics and capabilities of the available tools is essential to theirmost effective use. Therefore, we shall spend some time learning about these tools withouttoo much regard to their eventual CONSIDERATIONSAll the relays that we shall consider operate in response to one or more electrical quantitieseither to close or to open contacts. We shall not bother with the details of actualmechanical construction except where it may be necessary for a clear understanding of theoperation.
18 FUNDAMENTAL RELAY-OPERATING PRINCIPLES AND CHARACTERISTICS Time delay is obtained in induction-type relays by a "drag magnet," which is a permanent magnet arranged so that the relay rotor cuts the flux between the poles of the magnet, as shown in Fig. 4. This p roduces a retarding effect on motion of the rotor in either di rection.
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: