Induction melting furnace maintenance checklist

Malo olakwika	Failure performance	Zifukwa ndi njira zoyendera	Anakonza
Kulephera kwa wophwanya	1. Potseka, pamakhala phokoso lakutsegula nthawi yomweyo	1. Gawo la magawo atatu ndilofupikitsa ndipo silingatsekeke (nthawi zambiri limayamba chifukwa cha kutentha kwa thyristor)	1. Bwezerani thyristor ndikuyang’ana dera lalifupi
	2. Measure that the upper end of the circuit breaker has electricity and the lower end has no electricity	2. Kutulutsidwa kwa undervoltage kumatenthedwa kapena kusatsekedwa	2. Kuonetsetsa kuti zida sizifupikitsa, mutha kuzimanga kaye ndi chingwe kuti zisathe kudumpha.
	3. Palibe kuyankha ndipo palibe phokoso pamene mphamvu ikukwera	3. Koyilo ya shunt imakhala yotsekedwa nthawi zonse, fufuzani ngati koyilo yotsegula ili ndi mphamvu potseka	3. Mukhoza kumasula ulusi kumapeto kwa koyilo poyamba, gwiritsani ntchito kutsegula kwa makina, ndiyeno fufuzani dera pambuyo pomaliza kupanga.

		4. Thermal relay failure or action	4. Mutha kulumikiza ma terminals awiri a relay poyamba, ndikuwunika pambuyo pomaliza
		5. Mechanical failure	5. Onani ngati ikhoza kutsekedwa pamanja, ndipo fufuzani pambuyo pa kupanga
Kulowa mzere inductance	1. Kuyenda komwe kumachitika chifukwa chafupikitsa ndi kuyatsa kwa inductor	1. Yang’anani ngati inductor ikunyezimira, kapena mtunda pakati pa kutembenuka kwa koyilo uli pafupi	1. Gwirani ma koyilo omwe ali pafupi wina ndi mnzake, ndikuyika zida zoteteza kuti zisiyanitse

	2. Burning KP thyristor caused by too few turns	2. Yang’anani kuchuluka kwa koyilo kuti muwone ngati ndi ochepa	2. Bwezerani m’malo mwa koyilo yayikulu yolumikizira munthawi yake
KP thyristor ya 12- pulse rectifier string	1. Magetsi awiri a DC ali ndi kugwedezeka kwakukulu kosasunthika, ndipo inverter singayambe	1. Onani ngati rectifier voltage equalizing resistor yawonongeka	1. Bwezerani voteji equalizing resistor, ndipo pamene akadali kugwedezeka, mukhoza kuphatikiza awiri resistors mlatho mu mlatho umodzi.

	2. Onani KP SCR	2. Check whether the rectifier and anti-parallel diode is damaged	2. Bwezerani diode
KP SCR	1. The circuit breaker cannot be closed (top circuit breaker)	1. Onani ngati KP SCR yapsa	1. Bwezerani thyristor
	2. Sitingayambe	2. Onani ngati nyali za KP thyristor pulse zili zonse ndipo kuwala kuli kofanana	2. Kuwala sikufanana, chifukwa cha 3, . 4 bar kuyang’ana ndi
	3. The noise is loud when the power is increased	3. Onani ngati dera la SCR ndilabwinobwino	3. Mawaya awiri amatha kulumikizidwa kwakanthawi koyamba, ndipo mawaya amatha kufufuzidwa pambuyo pomaliza kupanga.

		4. Yang’anani ngati kukana pakati pa rectifier SCR G ndi K kuli koyenera (kawirikawiri 10-25R ), ngati sikuli kwachilendo, fufuzani ngati ndi vuto la mzere kapena vuto la SCR	4. Pitirizani ku Gawo 3 pazovuta za dera , ndipo vuto la SCR liyenera kusinthidwa
Air core reactor	1. Chifukwa cha inductance yaying’ono yofunikira pama reactors angapo, ma inductors obowo amagwiritsidwa ntchito, omwe amachepetsa kulemera ndi kuchuluka kwake, komanso amachepetsa mtengo wokonza, chifukwa mtunda wapakati pa kutembenuka kwa koyilo ndi wautali ndipo makulidwe a khoma la mkuwa samakonda kuyaka. ndi kutuluka kwa madzi. Zodabwitsa

Reactor yokhala ndi chitsulo pakati	1. Kuyatsa kwa riyakitala	1. Yesani ngati kukana kwa mphete yamkuwa ya riyakitala ndi chitsulo chachitsulo ndi chachifupi (pamene mzere uli 380V, kukana kuyenera kukhala kwakukulu kuposa 1K)	1. Phatikizani chowongolera kuti muwone kuti ndi koyilo iti yomwe yafupika, ndikuikonza kapena kuyisintha

	2. Sitingayambe	2. Yang’anani ngati madzi akutuluka mu rector	2. Sula riyakitala kuti muwone kuti ndi koyilo iti yomwe ikutuluka kuti ikonzedwe kapena kusinthidwa

	3. Ulendo pamene mphamvu yawonjezeka pamene ingayambike	3. Chepetsani kuwala kwamkati kuti muwone ngati pali chodabwitsa chamoto	3. Ngati palibe zowonjezera kwakanthawi ndipo riyakitala ili ndi matembenuzidwe ambiri, koyilo yosweka imatha kuchotsedwa popanda kusokoneza magwiridwe antchito a makina, ndipo imatha kugwiritsidwa ntchito kwakanthawi mpaka kumapeto kwa kupanga.