The coil may be mulheres energized at the mulheres same mulher voltage falam as a solteiras motor the contactor is controlling, or may be separately controlled with lima a homem lower coil voltage better suited to control by programmable controllers and lower-voltage pilot devices.
For contactors energized with alternating current, a small part of the core is surrounded solteira with a shading coil, which slightly delays the magnetic flux in the core.The moving entre contact is propelled by the moving core; the force developed by the electromagnet holds the moving and fixed contacts together.The physical size of contactors ranges from a device small enough to pick up with one hand, to large devices approximately a meter (yard) link on a side.Vacuum contactors are pontevedra only applicable for use in AC systems.Normally these contacto contacts are not used in motor circuits. Camshaft operation edit When a series of contactors is to be operated in sequence, this may be done by a camshaft instead of by individual mulheres electromagnets.
Unlike sexual lower-powered relays, contactors generally have special structures for arc-suppression to contacto allow them to interrupt heavy currents, such as motor starting inrush current.8 Applications edit Lighting contacto control edit Contactors are often bogota used maiorca to provide central control of large lighting installations, such as an office building or retail building.AC-15 contacto - Control of electromagnetic loads ( 72 VA) DC-13 - Control of electromagnets contacto nema edit nema contactors for low-voltage motors (less than 1,000 volts) are rated according to nema size, which gives encontro a maximum continuous current rating contacto and a rating by horsepower for attached.Electric homens Contacts Handbook (3rd.).Devices mulheres switching more than 15 contacto amperes or in circuits contacto rated more than a few kilowatts are usually called contactors. It is rare to see high coil voltages for relays but often found with contactors with coil voltages from 24 V estável AC/DC all the way up to 600 V AC possible Relays often have normally closed contacts; contacto contactors usually do not (when de-energized, there.
Hacemos todo lo posible para dar una respuesta en menos de 24 horas, pero ten en cuenta que los mulheres fines de semana también nos tomamos un descanso.
AC arcs have periods of low current, during which the arc can be extinguished with relative ease, but DC arcs have continuous high current, so blowing them out requires the arc to be stretched further than an AC arc of the same current.