Hauv thaj chaw tsim hluav taws xob, 10kV cov chaw faib khoom ua haujlwm tseem ceeb hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, ua cov chaw hloov chaw xa hluav taws xob xa hluav taws xob mus rau qhov kawg - cov neeg siv. Ntawm lawv, 10kV qhuav-hom transformer yog "lub siab" ntawm qhov chaw nres tsheb hloov chaw. Txij li thaum qhuav- hom transformers tau qhia rau Tuam Tshoj los ntawm txawv teb chaws thaum xyoo 1980s, lawv cov kev loj hlob txhua xyoo tau tshaj 25%, dhau los ua lub hauv paus hauv cov chav faib khoom vim qhov zoo ntawm kev txuag hluav taws xob, kev tiv thaiv ib puag ncig, thiab kev ua tau zoo. Lub 150 kva qhuav hom transformer, raws li cov qauv siv feem ntau, yog siv dav hauv ntau yam xwm txheej xws li chaw ua si thiab chaw ua lag luam. Tom qab txhim kho qhov qhuav tshiab -hom transformer, kev ntsuas hluav taws xob xa mus yog qhov tseem ceeb los xyuas kom meej tias nws muaj kev nyab xeeb. JINSHANMEN TECHNOLOGY CO., LTD, tus kws tshaj lij kev tsim khoom, feem ntau tsim cov roj immersed fais fab transformers, qhuav -hom fais fab transformers (xws li 150 kva qhuav hom transformer), roj rau peb-dimensional coiled fais fab transformers, qhuav- hom fais fab mov, peb hom{19} tawg- pov thawj qhuav- hom transformers, mining explosion-proof mobile substations, amorphous alloy power transformers, on load peev regulating power transformers, locomotive dry-hom transformers, as well as prefabricated substations, modular substations, cua zog, low voltage substations kis tau tus mob thiab faib khoom. Lub caij no, lub tuam txhab tseem muab kev txhawb nqa rau cov cuab yeej siv xws li lub ncoo mounted tis transformer.
1. Kev soj ntsuam daim ntawv thov ntawm 10kV Qhuav-Hom Transformers
10kV qhuav- hom transformers yog dav siv nyob rau hauv lub hwj chim systems, characterized los ntawm huab cua raws li qhov nruab nrab cua txias. Lawv cov qauv yooj yim, kev saib xyuas yooj yim, kev pab lub neej ntev, kev ntseeg siab, thiab cov nplaim hluav taws muaj zog ua rau txo qis cov haujlwm ua haujlwm. Lawv tuaj yeem ntsia tau rau hauv cov chaw thauj khoom, ua rau lawv nce nqi thiab nce qib. Piv nrog roj-immersed transformers, lub150 kva qhuav hom transformermuaj qhov zoo tshaj plaws: kev poob qis thiab kev ua haujlwm siab - SC(B)9 series txo qhov poob los ntawm 10% piv rau tam sim no lub teb chaws tus qauv tshiab (GB/T10228); zoo noo noo tsis kam, muaj peev xwm ua haujlwm zoo ntawm 100% av noo yam tsis muaj ziab tom qab kaw; tsis tas yuav muaj chav hloov pauv hloov pauv, cov tub ntxhais nqa nqa, lossis thauj khoom-cov kab teeb, txuag hluav taws xob engineering; tsis muaj roj, zam cov pa roj carbon monoxide emissions thiab ib puag ncig muaj kuab paug, thiab tshem tawm qhov xav tau ntawm cov roj sau cov pits, txo cov nqi hluav taws xob engineering. Tsis tas li ntawd, nws nta tsis muaj suab nrov, hluav taws kub tsis kam, me me, lub teeb yuag, yooj yim installation, tsis tshua muaj paug paug (feem ntau qis dua 10PC), muaj zog luv luv -circuit resistance, tsis tshua muaj kev khiav hauj lwm thiab tu nqi, thiab 30- xyoo kev pab cuam lub neej. Nws kuj tau nruab nrog qhov sib txawv, overcurrent, 10kV xoom-ib ntu tam sim no, overload, thiab tiv thaiv kub. Ntawm lawv, qhov sib txawv thiab kev tiv thaiv overcurrent trigger tripping rau 35kV thiab 10kV sab keyboards; 10kV xoom-sequence tiv thaiv tam sim no mus rau 10kV sab hloov; overload thiab kub tiv thaiv xa tswb. Zoo ib yam li 150 kva qhuav hom transformer, lub ncoo mounted tis transformer kuj muaj kev ua haujlwm siab, thiab JINShanMEN TECHNOLOGY CO., LTD muab kev daws teeb meem rau ob qho tib si.
2. Kev Xeem Lub Hom Phiaj thiab Cov Cai
2.1 Lub Hom Phiaj Xeem
Lub hom phiaj tseem ceeb ntawm kev ntsuas hluav taws xob xa mus rau 10kV qhuav- hom transformers yog los xyuas cov khoom siv hluav taws xob ntawm windings thiab leads, winding resistance balance, tiv thaiv kev ntseeg tau thiab rhiab heev, thiab lwm yam kev ntsuas kev ua tau zoo ntawm cov kev qhia tshwj xeeb. Qhov no ua kom lub 150 kva qhuav hom transformer thiab lwm yam qauv ua haujlwm zoo tom qab commissioning. Rau cov cuab yeej zoo li lub ncoo mounted tis transformer, kev ua haujlwm zoo sib xws kuj yuav tsum tau ua ntej ua haujlwm.
2.2 Kev Tiv Thaiv Kev Nyab Xeeb rau Cov Khoom Siv Xeem
Kev ntsuas lub zog yuav tsum tau txais qhov "ib qho kev hloov ntawm ib lub tshuab", txuas nrog lub qhov dej tiv thaiv nrog cov ntsuas hluav taws xob tsawg dua lossis sib npaug li 30mA thiab lub sijhawm ua haujlwm<0.1ms. The test instrument shell must be well grounded with a grounding wire cross-section ≥5mm², and power cords must be undamaged and non-aging. Knobs should rotate smoothly without interruptions or sudden jumps. Multimeters, megohmmeters, current-voltage meters, mobile power strips, insulating gloves, and boots must be qualified and within the validity period. Tools should have good insulation. A safety warning area must be set up to prohibit unauthorized access, and operators must hold relevant qualifications. These requirements also apply to tests for the pad mounted distribution transformer.
3. Cov txheej txheem xeem, cov txheej txheem thiab cov kev xav tau
3.1 Ntsuas DC Resistance ntawm Windings nrog Bushings
Rau transformers uas muaj peev xwm Tsawg dua los yog sib npaug rau 1600kVA (xws li 150 kva qhuav hom transformer), qhov sib txawv ntawm qhov ntsuas theem yuav tsum yog<4% of the average value, and between line measurements <2% of the average value. Unbalance rate = [(Maximum three-phase measured value - Minimum three-phase measured value) / Three-phase arithmetic average value] × 100%. Measurement methods: Use an inductive load quick-measuring ohmmeter in accordance with its technical requirements; for a double-arm bridge, wire as shown in Figure 1; for a single-arm bridge measuring high-resistance windings, subtract the lead resistance. Compare with the factory test value at the same temperature: the change should not exceed 2%. Convert resistances at different temperatures using the formula: Rx = Ra × (T + tx) / (T + ta), where Rx = resistance at tx, Ra = measured resistance at ta, T = conversion coefficient (235 for copper, 225 for aluminum), tx = target temperature, ta = measurement temperature.
3.2 Txheeb xyuas qhov hloov pauv ntawm txhua tus kais dej
Txheeb xyuas qhov kev hloov pauv ntawm txhua txoj haujlwm kais. Qhov piv yuav tsum ua raws li cov chaw tsim khoom lub npe cov ntaub ntawv thiab ua raws li txoj cai hloov pauv. Qhov tso cai sib txawv rau qhov ntsuas kais yog ± 0.5%, thiab rau lwm cov kais dej, nyob rau hauv 1/10 ntawm tus nqi transformer impedance (tab sis tsis tshaj 1%). Qhov kev kuaj no tseem ceeb sib npaug rau 150 kva qhuav hom transformer thiabpad mounted faib transformerlos xyuas kom meej qhov voltage tswj qhov tseeb.
3.3 Txheeb xyuas Winding Connection Group thiab Polarity
Qhov kev kuaj xyuas no ua kom muaj kev ua haujlwm sib luag thiab kev tiv thaiv polarity, feem ntau yog siv DC txoj kev: txuas lub roj teeb qhuav rau AB, BC, AC (A zoo, B tsis zoo), thiab saib xyuas cov kev taw qhia thiab qhov siab tshaj plaws ntawm qhov qis -voltage voltmeter (qhov zoo, b tsis zoo). Cov pab pawg sib txuas kom raug thiab polarity yog qhov tseem ceeb rau kev sib koom tes ntawm 150 kva qhuav hom transformer nrog rau lwm yam khoom siv.
3.4 Ntsuas Rwb thaiv tsev Resistance ntawm Windings nrog Bushings
Rau 10kV qhuav- hom transformers, siv 2500V, 5000V, los yog 10,000MΩ+ megohmmeter rau thawj sab rau hauv av thiab thawj sab theem- rau- theem ntsuas. Rau 10,000/400V transformers, siv 500V megohmmeter rau sab thib ob. Lub rwb thaiv tsev tiv thaiv yuav tsum tsis pub tsawg dua 70% ntawm lub Hoobkas kuaj tus nqi. Qhov ntsuas no ncaj qha cuam tshuam qhov kev ntseeg tau ntawm rwb thaiv tsev ntawm 150 kva qhuav hom transformer.
3.5 AC Withstand Voltage Test
Transformers nrog lub ntsuas winding voltage<10kV require an AC withstand voltage test with a 50Hz power supply and a nearly sinusoidal waveform (wiring as shown in Figure 2). The current-limiting resistor is selected at 0.2-1.0Ω/V. To measure capacitive current, connect a milliammeter and a parallel short-circuit protection switch to the high-voltage coil tail of the test transformer. This test simulates the actual operating conditions of the 150 kva dry type transformer and verifies insulation durability.
4. Cov lus xaus
Kev ntsuam xyuas hluav taws xob xa mus rau 10kV qhuav-hom transformers (xws li 150 kva dry type transformer) yog qhov tseem ceeb rau kev ua kom muaj kev nyab xeeb thiab txhim khu kev qha. Los ntawm kev siv nruj ntawm cov kev sim saum toj no thiab cov ntaub ntawv tsom xam, qhov ua tau zoo ntawm lub transformer ua ntej commissioning tuaj yeem ua tiav tag nrho, tsis txhob muaj qhov yuam kev.JINSHANMEN TECHNOLOGY CO., LTD, nrog nws cov kws tshaj lij R & D thiab cov peev txheej tsim khoom, tsis yog tsuas yog muab siab -zoo qhuav- hom transformers thiab pad mounted tis transformer tab sis kuj muaj cov kev taw qhia rau kev sim thiab commissioning, ua rau muaj kev ruaj ntseg ntawm cov khoom siv hluav taws xob thiab kev faib khoom.