Prîncipalîk Dikarinan Rewela Kupa û Tîpa Yê

Cûpa Relêy Induction

Ev releya cûpa induction û ev bîr versiyon e releya disc induction ye. Cûpa relêy induction bi serbestina releya disc induction da werin. Serbestina herêmî ya releya wekî motor induction çar pîv ya hêît pîv e. Hejmarê pîvên di releya parastin de li gor hejmarê lînkên ku hewce ye. Wêne wîsteyek releya cûpa induction çar pîv e.
Dema ku heman disc releya induction bi cûpa aluminum were biguheztin, inersiya sistema xweşkana releya derbas bike. Ji ber inersiya mekanîkî ya zêdetir, rengi operasyon releya cûpa induction zêde yên releya disc induction e. Li girtî, sistema pîva projeksiyonkir dibexsin da torque per VA input bêtir bibe.

Di unita çar pîv de, ku di misalê me de nîşan did, eddy current ku ji bo yek jore pîvên deroja, bixweber ji bo yek jore pîvên din derbas bibe. Ev torque per VA releya vê releya têra sêher ên releya disc induction bi elektromagnet C-shaped e. Ji bo magnetic saturation pîvan dikevin ku bi serbestina bêrbar bibe, rengên operasyon releya bikin lineer û têgihî ji bo navcheya çend barê operasyon.

Serbestina Operasyon Releya Cûpa Induction

Wek mînak di dema ku mînakên serbestina operasyon releya cûpa induction, serbestina motor induction ye. Magnetic field xweşk ji bo yek jore pîvên pîvên gotin dibexsin. Di serbestina çar pîv de heman jore pîvên pîvên gotin ji bo secondary current transformer’s bibin, betereku ji bo currents ên du jore pîvên pîvên gotin 90 deg ye; Ev dibexsin da ku heman inductor bi serial coil yek jore pîvên pîvên gotin bibin, û bi serial coil yek jore pîvên pîvên gotin resistor bibin.

Magnetic field xweşk eddy current di cûpa aluminum de derbas bibe. Wek mînak di serbestina motor induction de, cûpa di rêjeya magnetic field xweşk de xweşkeribin, bi rengi qalbiya magnetic field xweşk. Cûpa aluminum bi spring hêr bibin: Di şertên normal de, torque bêtir springê zêde yên torque deflection cûpa ye. Nakebirin cûpa çawtis. Betereku di şertên çewtiya system de, current bi coil zêde ye, li vir torque deflection cûpa zêde yên torque bêtir springê, cûpa xweşkeribin wek rotor motor induction. Contacts bi cûpa xweşkeribin ji bo angle xweşk.

Serbestina Releya Cûpa Induction

Sistema magnetic releya serbestin bi cut steel sheets circular bibin. Pîvên magnetic bi projected di inner periphery yek dilaminated sheets de bibin.
Field coils bi pole dilaminated bibin. Field coil yek jore pîvên pîvên gotin bi series bibin.
Cûpa aluminum bi core iron dilaminated bibin bi spindle ku ends fit jeweled cups bibin. Dilaminated magnetic field bi inside cûpa bibin da ku magnetic field cutting cûpa bêtir bibe.

Releya Cûpa Induction Directional an Power

Releya cûpa induction zêde yên directional an phase comparison units ye. Ev li gor sensitivity, releya cûpa induction torque steady non vibrating û parasitic torques ji bo current an voltage alone bege.

Di releya cûpa induction directional an power de, coils yek jore pîvên pîvên gotin bi voltage source bibin, û coils yek jore pîvên pîvên gotin bi current source system bibin. Dema ku flux produced by yek jore pîvên pîvên gotin proportional to voltage û flux produced by another jore pîvên pîvên gotin proportional to electric current.
Vector diagram releya vê releya dibexsin,

Lêgerîna vector diagram, angle between system voltage V û current I is θ
Flux produced due to current I is φ1 ku in phase with I.
Flux produced due to voltage V, is φ2 ku in quadrature with V.
Hence, angle between φ1 and φ2 is (90o – θ).
Therefore, if torque produced by these two fluxes is Td.

Where, K is constant of proportionality.
Here in this equation we have assumed that, flux produced by voltage coil lags 90o behind its voltage. By designing this angle can be made to approach any value and a torque equation T = KVIcos (θ – φ) obtained where θ is angle between V and I. Accordingly, induction cup relays can be designed to produce maximum torque when the angle θ = 0 or 30o, 45o or 60o.
The relays which are such designed, that, they produce maximum torque at θ = 0, is P induction cup power relay.
The relays produce maximum torque when θ = 45o or 60o, are used as directional protection relay.

Releya Cûpa Induction Reactance an MHO Type

Bi manipulasyon current voltage coil arrangements û relative phase displacement angles between various fluxes, releya cûpa induction bi measure either pure reactance an admittance. Such characteristics are discussed in greater detail in a session on electromagnetic distance relay.

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