Thermal relay - ntaus ntawv thiab hauv paus ntsiab lus ntawm cov lag luam

Thermal mus yog ib tug hluav taws xob ntaus ntawv uas tiv thaiv lub cev muaj zog los ntawm tej cuab yeej rauv taws tseem ceeb heev kub qhov tseem ceeb. Thaum dua load tej yam kev mob lub cav tias lub ntsiab ua ib yam ntawm cov mechanisms ntawm lub fais tshuab lossis tej khoom siv kov ib tug nce tus nqi ntawm hluav taws xob. No lub zog yuav ua tau ntau lub sij hawm hauv daim ntawv thov ntawm cov kev cai engine. Raws li ib tug tshwm sim, overload ntawm tus txheej txheem hauv lub fais Circuit Court pib sai kom qhov kub thiab txias. Qhov no, ntawm chav kawm, tej zaum yuav zoo ua rau kev puas tsuaj rau no tshuab. Yuav kom tiv thaiv no nyob rau hauv hluav taws xob circuits xws li yeem tshwj xeeb ntaus ntawv tsim rau fais fab tuag tshwm sim rau tej thaum muaj xwm ceev hom (transients nyob rau hauv hluav taws xob tes hauj lwm, congestion thiab lwm yam). Qhov no tiv thaiv cov chav tsev yog hu ua ib tug thermal relay (tej zaum koj yuav nrhiav tau cov npe ntawm lub "ntsuas" nyob rau hauv cov ntawv nyeem). Lub ntsiab hauj lwm ntawm lub thermal relay yog khaws cia rau hauv lub operating hom ntawm lub tshuab thiab nws zuag qhia tag nrho kev ua hauj lwm muaj peev xwm.

Lub thermal relay muaj ib tug tshwj xeeb bimetallic phaj nyob rau hauv nws cov sab hauv kev teeb tsa. Nyob rau hauv qhov kev txiav txim ntawm overloads thiab overvoltages nyob rau hauv qhov hluav taws xob network, xws li ib tug phaj yog bent (deformed), thiab nyob rau hauv nws ib txwm lub xeev nws muaj ib tug txaus tiaj. Qhov no bimetallic phaj nruj nreem ntxuav tawm ntawm hluav taws xob hu, thiab yog li ntawd tam sim no yuav dawb do ntws los ntawm qhov hluav taws xob Circuit Court.

Overvoltage thiab mus pab tau tus nqi ntawm lub fais tam sim no nyob rau hauv lub Circuit Court pib sai kom qhov kub thiab txias. Qhov no muaj txhawb rau cua sov rau cov yooj yim lub caij ntawm lub thermal relay - ib tug ob txheej hlau phaj. Cov yav tas pib khoov thiab terminates cov khiav ntawm lub hwj chim, txij thaum lub thermal relay no yog tsim los txiav tawm lub load thiab voltage thaum reloading cov mains.

Txawm li cas los, lub bimetallic sawb deflects sufficiently maj mam. Yog hais tias hu yog rooj noj thiab yog ncaj qha kev cob cog rua rau nws, tus uas tsis muaj deflection tus nqi tsis muab quenching tshwm sim thaum lub sij hawm tawg Circuit Court. Yog li ntawd, lub accelerating ntaus ntawv yog muab nyob rau hauv lub thermal relay tsim, lub thiaj-hu ua "hu bouncing." Nws hais ntxiv hais tias cov kev xaiv ntawm ib tug thermal relay yog raws li nyob rau hauv nws tus yam ntxwv xws li cov lus teb lub sij hawm nyob rau hauv lub qhov ntau ntawm cov hluav taws xob tam sim no.

Nyob rau hauv view ntawm cov kis ntawm lub tshuab ua hauj lwm yuav tsum tau nres. Tom qab ib co sij hawm (feem ntau yog ib nrab ib teev - ib teev) phaj cools thiab rov los rau nws cov yav dhau los lub xeev, yog dab tsi restores cov hluav taws xob Circuit Court voj. Tus ntaus ntawv los rov qab mus rau ib tug usable lub xeev.

Thermal relay yog ob peb hom. Thoob plaws TRP relay (rau ib theem load) TPH (rau ib ob-theem load), relay thermal PTT (kev nruam overload lub peb-theem Circuit Court) thiab lub cua sov hloov RTL (tiv thaiv ntawm electric motors tiv thaiv overload ntev).