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Simulation of circuit-breaker trip unit

By Lukáš Dostál

Abstract

Securing of electrical devices is important not only to protect against destruction under the effects of electric current, but also for protection of people or animals against electric shock. With increasing of living standards goes hand in hand increasing of the electricity consumption. Therefore In the grid of low voltage, there are increasing short-circuit currents. With improving technology is posed considerable demand on the performance, security and switching capacity of circuit breakers. This thesis is oriented on development of thermal and electromagnetic switch of circuit breaker on which is put a big demand in development of new types of circuit breakers. The thesis is interesting because of comprehensive use of circuits’ breakers since it can be used in AC and DC networks with frequency of 50 Hz and 400 Hz

Topics: Joulovy ztráty; OEZ; voltage drop; Jistič; Circuit breaker; short circuit trip unit; topítko; ztrátový výkon; power dissipation; tepelná spoušť; thermal trip unit; moulded case circuit breakers; current density; úbytek napětí; proudová hustota; zkratová spoušť; heater; výkonový jistič; Joule heat
Publisher: Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií
Year: 2010
OAI identifier: oai:invenio.nusl.cz:218784
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