Circuits breakers for industrial automation and process controling
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The document provides an overview of various types of circuit breakers used in industrial automation, including miniature, molded case, motor protective, vacuum, high voltage, medium voltage, air, outdoor, and residual current circuit breakers. Each type is described in terms of its operation, protection capabilities, and common applications. Additionally, it includes contact details for Visum Ltd., located in Slovakia.
Circuits breakers for industrial automation and process controling
- 1. THE BEST VIRTUAL EXPO FOR INDUSTRIAL AUTOMATION PRODUCTS Introduction to : Circuit breakers
- 2. Circuit breakers A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Miniature circuit breakers Molded case circuits brakers Motor protective circuit breakers Vacuum Thermal circuit-breakers High voltage Medium voltage Air Outdoor Residual current
- 3. M i n i a t u r e c i r c u i t b r e a k e r s Miniature circuit breakers are types of low- voltage circuit breakers that are designed to protect an electric circuit in cases of overloads that are more than 100A or in cases of short circuiting of electric current. These types of electric circuit breakers use either thermal or thermal- magnetic based operations.
- 4. M o l d e d c a s e c i r c u i t b r e a k e r s Molded case circuit breakers are types of protective electrical switches with a rating electrical current of up to 2,500A. Molded case circuit breakers normally use thermal or thermal magnetic operation elements to open or close electrical circuits protecting machinery from potential damage. These types of electrical circuit breakers are used to a larger extent in control panels, switchboards, motor control centers and individual enclosures.
- 5. M o t o r p r o t e c t i ve c i r c u i t b r e a k e r s Motor protective circuit breakers are electrical switches whose main purpose is to protect circuits found in electric motor related machinery. These types of protective electrical switches are normally a combination protection unit that may have functions like that of a switch, over load relay or those of short circuit protective devices. To achieve complete protection and eliminate any form of malfunction, motor protective circuit breakers are used with a contractor hence achieving complete motor protection.
- 6. Va c u u m c i r c u i t b r e a k e r s Vacuum circuit breakers are electrical safety devices that has two electrical contacts enclosed in a vacuum. One of the contacts is fixed to a specific position while the other is free to move from one point to another hence in case the vacuum circuit breaker senses potential danger, the movable contact pulls away from the fixed contact creating a vacuum hence breaking the circuit.
- 7. Thermal circuit-breaker This are electrical safety devices that have the ability to break a given circuit through switching it off automatically if the temperature rises above the normal one that it is supposed to work within. Thermal circuit breakers are also known as commercial circuit breakers or circuit protectors in various electrical or manufacturing industries.
- 8. High voltage circuit breakers High voltage circuit breakers are mechanical switching safety electrical devices that mainly connect and break current circuits and are used to carry the nominal current in closed positions from one point to another. These types of circuit breakers are mainly used in power transmission applications and are relatively expensive as compared to other types of circuit breakers.
- 9. Medium-voltage circuit breakers Medium-voltage circuit breakers are safety devices that mainly use current sensing protective relays to decide on the most appropriate action opening electrical circuits to prevent damage of machinery or electrical equipment Medium- voltage circuit breakers are normally rated between 1 and 72kV. These are the second in terms of handling current following high voltage circuit breakers. These types of circuit breakers may be either assembled into switch gear line ups to be used in indoors applications or installed outdoors in various substations as individual components.
- 10. Air circuit breakers Air circuit breakers are electrical safety devices that usually operate in air at a given atmospheric pressure. Air circuit breakers are rated up to a maximum of 10,000A in the electrical field. Air circuit breakers can be categorized into either plain air circuit breakers or air blast circuit breakers. Air blast circuit breakers are used for the system voltage of of 245 KV and 420 KV where faster breaker operation is required to prevent current flow when hazardous situations arise.
- 11. Outdoor circuit breakers Outdoor circuit breakers are types of electrical safety devices that are mainly used to protect electrical circuits from high voltage or voltage fluctuations in outdoor applications. They can be identified as either live tank or dead tank outdoor circuit breakers according to their physical structural design. The main difference between the circuit breakers is that the switching device surrounded at potential ground in dead tank circuit breakers is at ground potential while that of a live tank is at a potential above ground.
- 12. Residual current circuit breakers Residual current circuit breakers are also known as residual current devices. These are electrical wiring safety devices that disconnects circuits in cases involving electrical current imbalance between the energized line conductors and the neutral conductors This ensures protection against earth- leakage that may exist on electric circuits protecting people and electric against direct or indirect contact.
- 13. VALVES Contact details : VISUM Ltd. Letna 40 040 01 Kosice Slovakia - E.U. Share this presentation and follow us on social networks