UL yog lub npe luv ntawm Underwriter Laboratories Inc., uas yog cov ntawv pov thawj tshaj plaws hauv Tebchaws Meskas thiab lub tsev haujlwm ntiav loj tshaj plaws koom nrog kev kuaj xyuas kev nyab xeeb thiab kev txheeb xyuas hauv ntiaj teb. Nws yog ib qho kev ywj pheej, tsis yog -rau- cov txiaj ntsig, lub koom haum tshaj lij uas ua cov kev sim rau pej xeem kev nyab xeeb. Nws siv cov kev sim kev tshawb fawb los kawm thiab txiav txim siab seb ntau yam khoom siv, cov khoom siv, cov khoom siv, cov khoom siv, thiab cov tsev puas tsim kev puas tsuaj rau lub neej thiab khoom thiab qib ntawm kev puas tsuaj. Nws txiav txim, sau, thiab faib cov qauv tsim nyog thiab cov ntaub ntawv uas pab txo thiab tiv thaiv kev poob ntawm lub neej thiab khoom, thiab ua qhov tseeb- nrhiav haujlwm. UL daim ntawv pov thawj yog tsis yog - ntawv pov thawj hauv Tebchaws Meskas, feem ntau yog rau kev sim thiab kev lees paub ntawm cov khoom lag luam kev nyab xeeb, thiab nws cov ntawv pov thawj tsis suav nrog EMC (Electromagnetic Compatibility) yam ntxwv ntawm cov khoom. Nws yog feem ntau koom nrog cov khoom pov thawj kev nyab xeeb thiab kev nyab xeeb kev lag luam ntawv pov thawj. Nws lub hom phiaj kawg yog kom tau txais cov khoom lag luam nrog qee qib kev nyab xeeb rau kev ua lag luam thiab pab txhawb rau kev lees paub ntawm tus kheej kev noj qab haus huv thiab kev nyab xeeb ntawm vaj tse. Nyob rau hauv cov nqe lus ntawm cov khoom pov thawj kev nyab xeeb raws li ib tug zoo txhais tau tias ntawm kev tshem tawm kev teeb meem kev lag luam thoob ntiaj teb, UL kuj plays lub luag hauj lwm tseem ceeb nyob rau hauv txhawb kev loj hlob ntawm kev lag luam thoob ntiaj teb.
Founded hauv 1894, UL yog ib lub koom haum uas tsis yog -cov khoom lag luam kuaj kev nyab xeeb thiab ntawv pov thawj. Muaj ntau tshaj 50 lub chaw kuaj mob thoob ntiaj teb, muaj txog 6,000 tus neeg ua haujlwm. Txhua xyoo, ntau txhiab cov khoom tau lees paub los ntawm UL thiab siv cov cim UL. Tam sim no, UL muaj ze li ntawm 800 txheej txheem, 75% ntawm cov uas tau txais los ntawm American National Standard Institute (ANSI).
Nws cov haujlwm tuaj yeem muab faib ua ob ntu.
Ua ntej: cov qauv kev nyab xeeb.
Qhov tseeb, kev tsim cov qauv kev nyab xeeb ntawm cov khoom lag luam yog inevitable. Yog tias tsis muaj kev lees paub dav dav ntawm cov qauv kev nyab xeeb ntawm cov khoom, qhov tseem ceeb ntawm kev ntsuas kev ua tau zoo ntawm cov khoom yuav raug txwv. Sawv cev ntawm cov koom haum kev lag luam, cov tuam txhab tsim khoom thiab tsoomfwv, UL tau tsim cov qauv kev nyab xeeb thiab kev nyab xeeb, uas tau siv dav hauv tebchaws thiab thoob ntiaj teb.
Thib ob: kuaj cov khoom thiab qhov chaw.
Qhov thib ob thiab pom tseeb tshaj plaws ua haujlwm ntawm UL yog cov khoom lag luam thiab cov khoom siv kuaj. Nws qhov kev sim ntsuas tau tshaj 12,000 cov khoom, uas tau sim hauv 4 lub chaw soj ntsuam ywj pheej uas npog thaj tsam ntawm 1 lab square feet. UL tuaj yeem ntsuas qhov hluav taws xob, kev tiv thaiv hluav taws thiab kev nyab xeeb ntawm ntau yam khoom siv, khoom siv, vaj tse thiab tshuab. Ntxiv rau kev sim thiab ua pov thawj tag nrho cov txheej txheem, UL kuj tuaj yeem kuaj nws cov khoom. Tag nrho cov khoom kuaj thiab lees paub tau teev nyob rau hauv UL Recognized Components Index.
Kev tshuaj xyuas tsis tau hais
Thaum ib lossis ntau cov khoom ntawm cov chaw tsim khoom tau teev nyob rau hauv daim ntawv teev npe UL, UL cov neeg kuaj xyuas yuav tuaj xyuas lub Hoobkas tsim khoom los tshawb xyuas yam tsis muaj ntawv ceeb toom ua ntej.
Thaum lub sijhawm kev tshawb nrhiav, UL cov neeg soj ntsuam yuav sau cov chaw tsim khoom tswj kev tsim khoom, sau cov ntawv tshaj tawm kev lis kev cai, ntawm -qhov chaw kuaj khoom, qhov chaw thiab kev kuaj tshuab, thiab lwm yam. Lub hom phiaj ntawm qhov kev tshuaj ntsuam tsis tau tshaj tawm no yog los xyuas kom meej tias UL- cov khoom cim tau tsim ua raws li UL cov cai. Cov kev tshuaj ntsuam tsis tau tshaj tawm no tau ua tsawg kawg plaub zaug hauv ib xyoos.
PBM's UL ntawv pov thawj
PBM tam sim no muaj UL daim ntawv pov thawj rau PB3N175B12H thiab PB3N250B1E-TY0. Peb siv UL507 tus qauv xeem thiab ua cov kev xeem hauv qab no:
1, Kev kuaj tam sim no;
2, Grounding circuit continuity test;
3, Pib qhov kev xeem tam sim no;
4, Kev xeem nkag;
5, Kev ntsuas kub nce siab;
6, Kev ntsuas hluav taws xob tiv thaiv;
7, Kev ntsuas dej tsis zoo;
8, Stalled rotor xeem;
9, Tidal xeev xeem;
10, Kev ntsuas hluav taws xob torque;
11, Cua hniav kuaj tsis muaj kev tiv thaiv npog;
12, Fais Fab Thrust Test;
13, Ntxuam viav vias xeem;
14, Tiv thaiv plhaub pob cuam tshuam kev kuaj;
15, Tiv thaiv lub plhaub zoo li qub kev sim siab;
16, Portable ntxuam hniav xeem;
17, Kev sim poob;
18, Kuaj kev ntsuam xyuas kev nyab xeeb;
19, Kev ntsuas kev ruaj ntseg;
Tom qab dhau tag nrho cov kev xeem, lawv muab peb daim ntawv pov thawj UL.
Cov hauv qab no yog qee yam ntawm cov khoom xeem, cov qauv xeem thiab cov qauv xeem, thiab lwm yam.
Test yam 1: xauv rotor ntsuas kub
Kev sim txoj kev: Lub cev muaj zog tau teeb tsa rau ntawm qhov chaw thermally insulated thiab taw qhia raws li cov lus qhia tau cim.
Lub rotor raug kaw thiab cov ncej hauv av los ntawm 3 A tsis yog - lub sijhawm ncua sijhawm cartridge fuse.
Rau lub cev muaj zog uas tsis yog-cov khoom siv hluav taws xob, qhwv cov khoom tsis yog-cov khoom siv hluav taws xob hauv cov ntawv hlau hlau thiab txuas txhua yam khoom siv tau (lossis tuag) hlau ua ke rau hauv cov ntawv hlau thiab tom qab ntawd txuas los ntawm 3 A-ampere tsis yog- lub sijhawm ncua sijhawm cartridge fuse rau hauv av.
Cov qauv tau ua kom muaj zog ntawm qhov ntsuas qhov ntsuas hluav taws xob rau kaum lub voj voog ntawm kev ua haujlwm, nrog rau kev tswj tau rov pib dua sai li sai tau txhua zaus nws qhib lub cev muaj zog.
Thermocouples tau muab tso rau ntawm lub cev muaj zog windings thiab ntsuas kub tau soj ntsuam nrog cov cuab yeej tsim nyog rau tag nrho cov kev xeem.
Cov txiaj ntsig kev xeem: Qhov chaw ceev yog 3200RPM, qhov siab tshaj plaws ambient kub yog 24.8 degree, qhov ntsuas kub nce yog 33.6, thiab qhov kev xeem dhau.
Test yam 2: dielectric voltage-thov, kuaj tom qab xauv rotor, ntsuas kub, dielectric zog kuaj
Kev sim txoj kev: Tam sim ntawd tom qab ntsuas qhov ntsuas kub ntawm lub rotor, lub tshuab tau raug rau daim ntawv thov kev hloov pauv -tam sim no muaj peev xwm nyob rau hauv qhov ntau ntawm [40 - 70hertz rau UL nkaus xwb][50 - 60 hertz] lossis ncaj qha - tam sim no muaj peev xwm:
Cov txiaj ntsig xeem: dhau
Test yam 3: xauv rotor endurance test (manually reset tiv thaiv)
txoj kev ntsuas: Yog tias qhov ntsuas kub siab tshaj plaws ntawm lub cev muaj zog ntsuas thaum lub sijhawm ntsuas ntsuas -rotor ntsuas tau dhau qhov ntsuas kub li qub rau lub rwb thaiv tsev ua haujlwm lossis qhov siab tshaj plaws tam sim no ntsuas thaum lub sijhawm xauv -rotor ntsuas kub dhau qhov kev khiav hauj lwm tam sim no, manually reset mojector tiv thaiv rau ib qho ntxiv .1 50 lub voj voog ntawm kev siv hluav taws xob tam sim ntawd voltage- tiv thaiv kev sim.
Thaum lub sij hawm xeem, lub cev muaj zog tau energized ntawm qhov voltage qhia hauv qab no nrog rotor xauv thiab thav duab grounded los ntawm ib tug 3 A tsis yog - sij hawm ncua cartridge fuse.
Tam sim ntawd tom qab qhov xaus ntawm qhov kev sim siab, thiab thaum tseem nyob rau hauv ib lub xeev rhuab, tus qauv raug mus rau ib tug Dielectric xeem ntawm ob zaug lub cim ntsuas voltage ntawm cov tuag- hlau qhov chaw thiab cov windings rau 1 feeb.
Cov txiaj ntsig xeem: dhau
Xav tau UL- ntawv pov thawj EC kiv cua?
PBM yog Tuam Tshoj mainland EC (Electronically Commutated) brushless motor manufacturing thiab technology consulting tuam txhab muab ntau yam ntawm EC motors, kiv cua thiab ntse ventilation daws rau huab cua - txav tau meej thiab tas li nrog kev saib xyuas- pub dawb thoob plaws hauv lub neej voj voog ntawm cov khoom nyob rau hauv kaum xyoo dhau los. Yog tias koj xav tau UL- ntawv pov thawj EC kiv cua, thov hu rau peb hnub no!
