Ga wasu kana mafi yin bayanin IEE-Business Siemens GIS Bushing Cover don PD Testing

Kamar da take bayyana, idan kake nufin testi na PD (Partial Discharge) na zama don GIS na Siemens tare da yadda ake amfani da UHF—karkashin hukuma a gida shiga alamomin tsari na insulator ta bushing—ba za su iya kawo wata metal cover na insulator ta bushing ba.

Saboda nan?

Ba zan iya sanin dabi'a har zuwa taka cewa. Idan an kawo, zai fitowa gas SF₆ na GIS a lokacin da ya zo! Ya faru cewa—zai yi nasarawa zuwa diagram.

Kamar da aka baka a Figure 1, wata aluminum cover mai kwalliya a kan box mai ruwa da ke dogara shi ne suna so in kawo. In kawo shi ya ba electromagnetic waves na PD karfi sosai, wanda ya ba su aiki da PD equipment na offline. Wannan yadda ake amfani da shi a duk fannonin GIS. Amma saboda nan in kawo shi a cikin Siemens ya ba gas leakage?

Insulator ta bushing na Siemens ana kirkiro da duhu sealing rings. Kamar da aka baka a Figure 2:

• No. 01: Kirkiro na farko, wanda yake a casting na epoxy resin na insulator ta bushing.

• No. 02: Kirkiro na biyu, wanda yake a flange na aluminum alloy metal.

Wata aluminum cover da kake so in kawo shi ne yake a cikin wannan flange metal. Idan duhu sealing rings ba su mutane ko ban da wahala, in kawo wata cover mai kwalliya (Figure 1) ba zan iya ba da wahala—ba zan iya fitowa gas.

Amma, a cikin design na Siemens, akwai wata notch mai kwalliya a arewa maso girma na Figure 2 wanda ya sauka gas chambers na duhu sealing rings. Don tabbacin da zai fi son, tafi Figure 3.

Saboda wannan wata notch (Figure 3), sealing na gas na GIS yana iya inganta kawai daga kirkiro na biyu (No. 02) a cikin flange metal, kuma wata aluminum cover da kake so in kawo shi. A cikin wata cover mai kwalliya akwai gas SF₆ mai kwalliya—id kawo shi, zan iya samu nasara mai kungiyar.

Kafin haɗa, don insulator ta bushing mai phase na biyu kamar da ke baka a Figure 4, duhu sealing rings ba su mutane. Gas SF₆ mai kwalliya a cikin ya ba kirkiro na farko (No. 01) a cikin insulator na epoxy. Saboda haka, in kawo wata aluminum cover kamar da ke baka a Figure 5 yana da kyau—ba zan iya fitowa gas.

Kasuwanci:
Idan kake nufin kawo wata cover mai kwalliya a cikin insulator ta bushing don nufin PD (offline-type) na GIS daga wani maimaita, zaka duba maimaita don tabbatar da adanka a cikin kawo shi—musamman don Siemens, inda in kawo shi ba da hanyar da ba ya ba gas leakage mai kwalliya ba.