Prinsip Kerja Konstruksi dan Jenis Relai Cangkir Induksi

Induction Cup Relay

Wannan relay ba tana da wani ɗauke na induction disc relay. Induction cup relay ta yi aiki a cikin ƙarin bayanai da induction disc relay. Tsarin baka na wannan relay ya shafi kamar induction motor na tsari masu hukuma zuwa hukuma zuwa hukuma hukuma. Yawan hukumomin protective relay yana nufin da yawa da take daɗe. Tushen ya nuna hukuma zuwa hukuma zuwa hukuma hukuma na induction cup relay.
Idan mutum ya ɗaukar disc na induction relay da aluminum cup, yanayi na system na rotation ta zama zai ci gaba. Saboda yanayi mai kicce-kicce, zahiri na induction cup relay ya zama zai ci gaba daga induction disc relay. Duk da cewa, an sanya projected pole system don tabbatar da maximum torque per VA input.

A nan, a hukuma zuwa hukuma zuwa hukuma hukuma, eddy current na cup da ke faru saboda hukuma zuwa hukuma, tana da shiga a kan hukuma zuwa hukuma. Wannan ya haɗa, torque per VA na wannan relay ya zama uku daga induction disc type relay na C-shaped electromagnet. Idan magnetic saturation na hukuma za su iya duba, zahiri na relay ya zama linear da ma'arifin tsari na aiki a wurin yawan aiki.

Bayanai na Aiki na Induction Cup Relay

Daga baya, bayanai na aiki na induction cup relay, maimaita da induction motor. A rotating magnetic field tana faru saboda hukuma zuwa hukuma. A hukuma zuwa hukuma design, duk hukuma zuwa hukuma suna da shiga a kan current transformer’s secondary, amma phase difference daga currents na hukuma zuwa hukuma ita ce 90 deg; Wannan tana samun ne a kan inductor a series da coil na hukuma zuwa hukuma, da kuma resistor a series da coil na hukuma zuwa hukuma.

Rotating magnetic field tana faru current a kan aluminum brum ko cup. Daga baya, a bayanai na aiki na induction motor, cup tana haɗa a cikin hukuma zuwa hukuma, da zahiri na ta zama kadan daga hukuma zuwa hukuma. Aluminum cup tana ɗaukata da hair spring: A tsari na biyu, restoring torque na spring tana da shi a kadan daga deflecting torque na cup. Saboda haka, babu aiki na cup. Amma a lokacin da aikin system ta kasance, current na coil tana da shi a kadan, kafin, deflecting torque na cup tana da shi a kadan daga restoring torque na spring, kafin, cup tana haɗa a cikin hukuma zuwa hukuma. Contacts tana ɗaukata da movement na cup a specific angle of rotation.

Tsarin Baka na Induction Cup Relay

System na magnetic na relay tana faru saboda circular cut steel sheets. Magnetic poles tana ɗaukata a kan inner periphery na laminated sheets.
Field coils tana ɗaukata a kan laminated poles. Field coil na hukuma zuwa hukuma tana ɗaukata a series.
Aluminum cup ko drum, tana ɗaukata a kan laminated iron core tana ɗaukata a kan spindle da ke fit in jeweled cups ko bearings. Laminated magnetic field tana ɗaukata a kan inside na cup ko drum don tabbatar da magnetic field cutting the cup.

Induction Cup Directional ko Power Relay

Induction cup relay tana da kyau a directional ko phase comparison units. Wannan ya shafi, saboda sensitivity, induction cup relay tana da steady non vibrating torque da parasitic torques saboda current ko voltage alone tana da shi a kadan.

A induction cup directional ko power relay, coils na hukuma zuwa hukuma tana ɗaukata across voltage source, da kuma coils na hukuma zuwa hukuma tana ɗaukata a kan current source na system. Saboda haka, flux na hukuma zuwa hukuma tana da shi a kadan daga voltage da flux na hukuma zuwa hukuma tana da shi a kadan daga electric current.
Vector diagram na wannan relay tana nuna haka,

A nan, a vector diagram, angle between system voltage V da current I tana θ
Flux na current I tana φ1 tana da shi a kadan daga I.
Flux na voltage V, tana φ2 tana da shi a quadrature daga V.
Saboda haka, angle between φ1 da φ2 tana (90o – θ).
Saboda haka, idan torque na waɗannan fluxes tana Td.

Daga baya, K tana constant of proportionality.
A nan, a wannan equation, muna ɗauka cewa, flux na voltage coil tana lag 90o behind its voltage. A nan, a design, angle tana iya samun value da kuma torque equation T = KVIcos (θ – φ) tana samun, inda θ tana angle between V and I. Saboda haka, induction cup relays tana da kyau a yi maximum torque idan θ = 0 ko 30o, 45o ko 60o.
Relays da suka da maximum torque a θ = 0, tana P induction cup power relay.
Relays da suka da maximum torque a θ = 45o ko 60o, tana amfani a directional protection relay.

Reactance da MHO type Induction Cup Relay

A nan, a manipulation na current voltage coil arrangements da relative phase displacement angles between the various fluxes, induction cup relay tana da kyau a measure either pure reactance ko admittance. Waɗannan bayanai tana nuna a greater detail a session on electromagnetic distance relay.

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