Anti-Seismic thiab Fixing Measures rau 1500 kVA Qhuav Transformer Installation

Vim li cas Anti-Seismic Fixing Matters rau 1500 kVA Qhuav Transformers

A 1500 kVA qhuav-hom transformer tuaj yeem hnyav ntawm 3,500 kg mus rau ntau tshaj 6,000 kg nyob ntawm qhov chaw kaw thiab qhov hluav taws xob. Thaum muaj kev tshwm sim seismic, lateral acceleration converts qhov loj no rau hauv loj shear thiab overturning rog. Yog tias tsis muaj kev tsim kho kom zoo, lub tsev yuav swb, tawg, lossis raug kev cuam tshuam sab hauv coil. Cov kev ua tsis tiav zoo li no ua rau lub tshuab hloov pauv thiab tsim arc-flash thiab hluav taws kub nyhiab rau cov neeg nyob ze. Qhov kev tsim kho yuav tsum yog li ntawd tsim kom muaj kev thauj khoom tas mus li los ntawm lub hauv paus transformer los ntawm cov thauj tog rau nkoj bolts rau hauv lub hauv paus.

Seismic Standards thiab Design Demand

Cov qauv hauv tsev niaj hnub xws li IBC thiab ASCE 7 faib cov tshuab hloov pauv raws li tsis yog - cov khoom siv uas yuav tsum tau nyob ruaj ruaj los tiv thaiv lub neej - kev nyab xeeb. Rau cov khoom siv substation, IEEE 693 txhais cov kev cai tsim nyog seismic, IEC 60068-3-3 qhia txog seismic test method, thiab NEHRP cov kev cai muab kev phom sij. Lub hom phiaj tsim qauv yog lub ncov hauv av acceleration (PGA) ntawm 0.5 g los yog siab dua ntawm lub hauv paus, nrog rau tag nrho cov transformer-skid sib dhos seem ua haujlwm tom qab tsim kev tshwm sim.

Foundation thiab Anchor Design

Cov pob zeb txhawb nqa yuav tsum raug txheeb xyuas ua ntej xaiv cov khoom siv kho vajtse. Lub pob zeb muaj zog ntxiv nrog qhov tsawg kawg nkaus compressive zog ntawm 25 MPa thiab lub thickness ntawm yam tsawg kawg yog 200 hli; 250 mm yog nyiam rau ntau dua seismic pawg. Cov thauj tog rau nkoj yuav raug cam khwb cia-hauv lossis tshaj tawm- nruab nrog kev pom zoo epoxy thauj tog rau nkoj. Thauj tog rau nkoj bolts yuav tsum tau qhov loj me rau kev sib xyaw shear thiab nro ntawm ACI 318, txiav txim siab tawg -cov xwm txheej thiab ntug kev deb. M20 lossis M24 qib 8.8 bolts nrog kub-dip galvanized lossis stainless- hlau tiav yog pom zoo, nrog rau qhov tob ntawm qhov tsawg kawg nkaus 190 mm rau ncej-ntsia anchors hauv cov pob zeb tawg.

Kauj Ruam -los ntawm -Txoj Kev Txhim Kho Cov Txheej Txheem

Paub meej tias cov pob zeb ua pob zeb tau kho, cov hnab ntim thauj tog rau nkoj huv si, thiab cov khoom siv ntxiv yog qhov pom zoo kos duab.

Muab cov ntaub thaiv kev vibration cais tawm (neoprene lossis lub caij nplooj ntoos hlav cais tawm raws li qhov tshwj xeeb acoustic) thiab txo qis lub tshuab hluav taws xob siv nws lub ntsej muag nqa lub ntsej muag.

Teem lub hauv paus-thav duab qhov nrog cov thauj tog rau nkoj thiab ua kom qhuav- haum yam tsis tau nruj.

Nruab seismic snubbers los yog nruj txwv nres qhov twg kab rov tav drift txwv yuav tsum tau; lawv yuav tsum tsis txhob hu rau lub hauv paus ncej nyob rau hauv ib txwm ua hauj lwm.

Ntxig thauj tog rau nkoj bolts nrog cov ntxhua khaub ncaws thiab xauv lub tshuab ntxhua khaub ncaws, tom qab ntawd nruj nrog lub ntsuas qhov ntsuas lub zog rau tus nqi phau ntawv, feem ntau 220 Nm +/- 10% rau M24, siv tus ntoo khaub lig- torque ib ntus.

Kos txhua tus ntsia liaj qhov rooj tom qab torquing thiab txuas LV thiab HV cables nrog hloov tau yooj yim braids los yog expansion pob qij txha uas nqus cov txheeb ze.

Feem ntau yuam kev kom zam

Rig bolting yam tsis muaj kev vibration rho tawm, uas xa cov av ntau dhau -kev ua kom muaj zog.

Undersized thauj tog rau nkoj (piv txwv li M16 qhov twg M24 yuav tsum tau), ua rau brittle breakout tsis ua hauj lwm.

Tsis quav ntsej prying rog ntawm lub hauv paus channel los ntawm cantilevered brackets los yog tsis sib xws shimming.

Hla ncej-kev tshuaj ntsuam av qeeg, suav nrog cov kab nrib pleb, cov bolts xoob, thiab deformed snubbers.

Technical Parameter Summary

Parameter	Pom zoo tus nqi
Transformer loj (tus qauv)	4, 200 - 6, 500 kg
Tsim PGA	0.5 g (siab) / 0.2 g (nruab nrab)
Anchor bolt	M24, qib 8.8, kub-dip galvanized
Embedment qhov tob (post-installed)	Yam tsawg kawg nkaus 190 mm
Torque tus nqi	220 Nm +/- 10%, hla -torque sequence
Vibration isolator	Spring isolator, 25 mm deflection, ua - nyob rau hauv seismic restraint
Base channel	C-channel 180 x 70 x 8 mm, S235JR los yog siab dua
Flexible connector	Braided tooj liab, 50 mm axial them
Foundation pob zeb	C25/30 (25 MPa), 250 hli thickness yam tsawg kawg nkaus
Ua raws li	IEC 60068-3-3, IEEE 693-3

Ncej -Kev kuaj xyuas

Tom qab kev teeb tsa thiab tom qab ib qho kev tshwm sim seismic tseem ceeb, tshuaj xyuas cov kab nrib pleb rau cov kab nrib pleb, txheeb xyuas lub bolt torque ntawm tus qauv, tshawb xyuas snubber clearance thiab deformation, thiab paub meej tias kev sib txuas ntawm cable tsis zoo. Cov ntaub ntawv ntawm thauj tog rau nkoj torque thiab kev soj ntsuam txhawb kev tswj kev nyab xeeb thiab kev tuav pov hwm.

FAQ

Dab tsi torque yuav tsum tau siv rau M24 thauj tog rau nkoj bolts?

Feem ntau 220 Nm +/- 10% rau M24 qib 8.8 bolts, siv nrog calibrated torque wrench nyob rau hauv tus ntoo khaub lig- torque sequence; ib txwm ua raws li phau ntawv qhia kev teeb tsa rau qib tshwj xeeb bolt.

Vim li cas thiaj xav tau kev sib cais ntawm kev vibration nyob rau hauv lub transformer?

Isolators txo kev sib kis ntawm cov qauv- ua rau muaj kev vibration thiab suab nrov, thiab tuaj yeem suav nrog ua - hauv kev txwv seismic. Rigid bolting yam tsis muaj kev sib cais tuaj yeem ua kom muaj zog hauv av thiab ua kom qaug zog.

Dab tsi yog qhov tsawg kawg nkaus embedment qhov tob rau kev tshaj tawm -ntsuas anchors?

Rau anchors nyob rau hauv tawg pob zeb nyob rau hauv seismic loads, ib tug yam tsawg kawg nkaus embedment ntawm 190 mm yog ib yam rau M24 epoxy anchors; tus nqi kawg yuav tsum txaus siab ACI 318 breakout thiab ntug- kuaj xyuas qhov deb.

Ntev npaum li cas lub pob zeb yuav tsum kho ua ntej kev teeb tsa?

Cov pob zeb yuav tsum ncav cuag lub zog compressive (piv txwv li 25 MPa) ua ntej thauj tog rau nkoj; qhov no feem ntau yog 7 mus rau 28 hnub nyob ntawm qhov sib xyaw tsim thiab kho cov mob.

Dab tsi yuav tsum tau kuaj xyuas tom qab av qeeg?

Tshawb xyuas cov pob zeb tawg, xoob lossis deformed thauj tog rau nkoj, tshem tawm snubbers, cov cim txav, thiab cov kab txuas puas ua ntej rov- zog.

Puas yog seismic snubers cuam tshuam rau kev ua haujlwm ib txwm?

Tsis yog. Snubbers tau teeb tsa nrog kev tshem tawm kom lawv tsis txhob tiv tauj lub hauv paus ncej nyob rau hauv ib txwm vibration; lawv koom nrog tsuas yog thaum kev hloov pauv sab nraud mus txog qhov txwv tsis pub muaj kev nyab xeeb.