Hattara don Ma'aunin Insulation na Generator
Ƙwararrun janareta sun haɗa da ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararru, kuma ɗayansu shine gwajin rufewa na janareta. A yau, zan gabatar muku da gwajin insulation na janareta da kuma abubuwan da ke buƙatar kulawa.
An kasu kashi na janareta zuwa abubuwa biyu: stator insulation da rotor insulation.
Insulation Stator
Wurin aunawa na stator insulation yana cikin janareta tsaka tsakin ƙasa majalisar. Za'a iya auna insulation na stator ne kawai lokacin da rotor ke cikin matsayi na tsaye ko shinge, ana cajin janareta tare da hydrogen zuwa matsi mai ƙima, an sanya ruwan sanyi na stator a cikin aiki, kuma ƙaddamar da ruwan sanyi yana kusa da 0.2 μS / cm.
# 1, yakamata a cire haɗin ƙasa na tsaka-tsakin janareta, kuma a ciro janareta PT trolley. Bayan haka, ana amfani da gwajin juriya na 1000V (megohmmeter) don aunawa. Ana la'akari da cancanta lokacin da rufin tsakanin lokaci da ƙasa bai kasance ƙasa da 1MΩ ba.
#2, sai a katse wuraren da aka yi amfani da wutar lantarkin na wutar lantarki a janareta tsakani da na'urar wutar lantarki mai ban sha'awa, sannan a ciro janareta PT trolley. Bayan haka, ana amfani da gwajin juriya na 2500V don aunawa. Lokacin aikace-aikacen ƙarfin lantarki don auna shine minti 1. Lokacin da zafin jiki ya kasance ƙasa da 20 ℃, rufin tsakanin lokaci da ƙasa bai kamata ya zama ƙasa da 0.5MΩ ba, kuma kowane lokaci ya kamata a auna sau ɗaya a cikin yanayin layi ɗaya na matakai uku. Idan ƙimar da aka auna ta kasance ƙasa da 80% na ƙimar da ke sama ko kuma bambanci a cikin ƙimar insulation tsakanin matakan ya fi 20%, rufin bai cancanta ba.
# 3, # 4, # 5, sai a ciro wuka na kasa na tsaka tsaki na janareta, sannan a ciro trolley na janareta. Bayan haka, ana amfani da gwajin juriya na 1000V don aunawa. Ana la'akari da cancanta lokacin da rufin tsakanin lokaci da ƙasa bai kasance ƙasa da 0.8MΩ ba.
Rotor Insulation Auna
Don Raka'a #1, yi amfani da gwajin juriya na 500V (megohmmeter). Juriya ga ƙasa ya kamata ya fi 20MΩ.
Ma'aikatan kulawa ne ke aiwatar da ma'aunin rufin rotor na Unit #2. Ana buƙatar cewa juriya ga ƙasa ya fi 100MΩ a 20 ℃ kuma ya fi 50MΩ a 30 ℃.
Don Raka'a #3, Raka'a #4 da Raka'a #5, yi amfani da gwajin juriya na 500V. Juriya ga ƙasa ya kamata ya fi 1MΩ.
Hattara don Ma'aunin Insulation na Generator
1) Yayin aikin maye gurbin iskar gas da kuma kunnawa da kashe gwajin na'urorin injin janareta-transformer, an haramta shi sosai don auna rufin dukkan sassan janareta.
2) Kada kayi amfani da ma'aunin juriya don auna juriyar juriya na sashin sarrafawa da na'urorin lantarki na majalisar gyarawa. Idan ma'auni ya zama dole, ya kamata ƙwararrun ma'aikata su yi shi.
3) Haɗa wayar megohmmeter na ruwa daidai don hana lalacewar megohmmeter na ruwa.
4) Bututun mai tara ruwa mai sanyaya ruwa mai sanyaya stator (tashoshi 94, 95, 96) ya kamata a dogara da shi bayan an auna.
5) Lokacin auna insulation na main exciter rotor na Unit #1 da Unit #2, da insulation gano canji na main exciter rotor ya kamata a canza zuwa matsayin (simulations for Unit #2) (gwajin ga Unit #1).
6) Lokacin auna insulation na rotor na Generator #3 da Generator #4, rotor grounding kariya fuse ya kamata a ja a bude. In ba haka ba, mai yuwuwa fis ɗin ya busa.
7) Kafin auna insulation na low-ƙarfin wuta gefen winding na excitation transformer, da fuses na DC capacitor, auxiliary transformer da synchronous transformer a cikin rectifier majalisar kamata a ja bude.
8) Lokacin auna insulation na janareta-transformer naúrar, maɓallin cire haɗin wutar lantarki na babban gidan wuta da na'urorin reshe na sabis na sabis na tashar wutar lantarki ya kamata su kasance a sarari, kuma tashar janareta PT ta kasance a wurin da aka cire.
9) Ana ba da izinin auna insulation na janareta ne kawai lokacin da rotor na janareta ya kasance a tsaye ko kuma hanawa don hana girgiza wutar lantarki ga ma'aikata ko lalata megohmmeter na ruwa.
Sanarwa: Labarin da ke kan gidan yanar gizon ko dai kamfanin Jlmech ne ya ƙirƙira shi (https://www.whjlmech.com) ko kuma an sake buga shi daga wasu kafofin watsa labarai na kai. Lokacin ambato ko sake buga abubuwan da ke cikin wannan labarin, da fatan za a nuna tushen!
