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siba熔斷器5006308-安徽天歐
溫度限制器
SIBA所有符合DIN 43625標準的高壓熔斷器都裝有溫度限制器
熔斷器的用途
高壓熔斷器作為中壓電氣開關設備的保護裝置,其zui大優點是發生短路故障時,能迅速動作。所以,用他保護電氣設備及裝置,防止短路的動態和熱效應是非常有效的。
SIBA高壓熔斷器可用來保護:
·配電變壓器
·高壓電動機
·高壓電容器
·電壓互感器
·饋電電纜
SIBA高壓熔斷器適合安裝在:
·空氣和氣體絕緣的戶內開關設備
·戶外開關設備
·惡劣氣候條件下的裝置
·油絕緣開關設備內
·油浸配電變壓器之內
定義
后備式熔斷器
后備式熔斷器能分斷從額定分斷電流到zui小分斷電流I3之間的一切電流,zui小分斷電流I3與額定電流In之間的故障電流不能安全分斷
額定電流
熔斷器能連續承受的、時間-電流特性曲線無變化的電流。在較高的環境溫度下。以及超標準的高額定電流下產生較高的功率損耗時,熔斷器應降低額定值使用。這種情況也適用于保護電動機線路的額定電流超過160A時,也應降低額定值使用
供電電壓
此電壓即實際用于裝有熔斷器電路的電壓。
時間-電流特性曲線
時間-電流特性曲線表示虛擬的熔化時間與預期的持續短路電流之間的相互關系,以中值表示。這種時間-電流特性曲線,存在±10%的電流誤差。
SIBA高壓熔斷器的突出特點:
·抗潮濕/灰塵和腐蝕的密封系統性能可靠
·耐老化
·功率損耗小、溫升低
·高分斷能力
·高限流
·開關電壓低
·由于*的控制制造工藝和多年的實驗經驗,產品性能穩定可靠。
三相系統中高壓熔斷器的更換
三相系統中若一個高壓熔斷器發生動作須更換,IEC282-1/VDE0670第四部分23.2節建議,全部三個熔斷器都要更換。
同樣在2極或3極短路情況下,由于熔斷器制造允許的誤差,導致其中1個或2個熔斷器在其他熔斷體熔化之前已發生動作,如果剩下的熔斷器仍在使用,則以后有可能發生有害運行。
用高壓熔斷器保護變壓器
對于配電網絡中的變壓器保護,主要采用后備式熔斷器,為了保證合適的保護,必須按VDE0670部分4表2來選擇。此表的基礎是:變壓器的額定容量50~200kVA所采用開關組為Yz5:250~1000kVA所采用的開關組為Dy5。此外,按相應的變壓器額定容量,其短路電壓分別Uk=4%和Uk=5%兩組,而且還包括2000kVA及以下的變壓器。其他額定容量,開關組和短路電壓Uk值,則需校驗所示值。
·用400VgTR型熔斷器保護
·用500VgL型熔斷器保護
·只有隔離開關,沒有任何保護裝置
用高壓熔斷器保護電動機線路
電動機線路的保護,是用后備式高壓熔斷器,其設計滿足電動機保護的特殊需要。
此熔斷器的功能是保護電動機的開關,防止不能允許的大過載電流,否則會造成觸頭焊。
此外,短路時,必須在數毫秒內分斷電路,以保護線路不受這種電流的動態影響。
選擇熔斷器保護電動機,不僅考慮電動機的額定電流,諸如電動機起動電流,每小時起動次數以及起動持續時間等指標,都應考慮。另外,還建議用熔斷器保護起動電流不大的電動機,熔斷器的額定電流至少兩倍于電動機的滿載電流。
考慮到電動機起動電流,起動時間和起動次數,來選擇高壓熔斷器的額定電流。
用高壓熔斷器保護電壓互感器
雖然高壓熔斷器不能在故障時有效保護電壓互感器,但按VDE0101要求必須安裝高壓熔斷器,當發生故障時應盡可能快地切斷電壓互感器的電源,以便限制故障的影響。建議采用盡可能小的額定電流,一般為6.3A的高壓熔斷器。
用高壓熔斷器保護電容器
當電容器或電容器組接到電網時,就有高短路峰值電流流過,其大小和持續時間取決于:
·電容器容量
·電網的頻率和電感量
·操作閉合角
為了考慮短路電流的沖擊負荷,熔斷器的額定電流至少應是電容器組額定電流的兩倍。
配合要求
高壓熔斷器間的配合
當供電電網遠離分電站,其線路用高壓熔斷器保護時,就可能出現配合問題,在這種情況下,上端高壓熔斷器的額定電流應是下一級的2倍。
高、低壓熔斷器間的配合
為了防止因低壓熔斷器故障導致高壓熔斷器分斷,必須保證有適當的配合,在低壓出線端有若干低壓熔斷器并聯工作時,選擇其中額定電流值zui高的熔斷器做為參考。
高壓熔斷器與低壓斷路器的配合
對這種運行方式,比較高壓熔斷器的時間—電流特性曲線與低壓斷路器保護分斷特性是可取的,為此把高壓熔斷器的時間—電流特性曲線轉換為低壓等級,然后與斷路器的分斷特性曲線比較。在低壓斷路器達到分斷容量之前,熔斷器已將故障清除,這種運行方式的配合是合理的。siba 172526.0,4
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siba 5019106.1
siba 3031211.16
siba 2215702
siba 5021528.5
siba 2055213.25
siba 2066432.9
siba 3020313.4
siba 2063731.7
siba 1000207.6
siba 2000403.425
siba 5019206.11
siba 2045213.2
siba 5005908.4
siba 3010253.1
siba 3010853.63
siba 5006108.5
siba 2071332.35
siba 6100201.3
siba 2045111.2
siba 3001013.1
siba 2044813.1
siba 5020106.16
siba 5005907.2
siba 2035913.2
siba 2028608.5
siba 5006107.2
siba 9006210.6
siba 2062832.55
siba 179021.3,5
siba 2063032.18
siba 2044204.315B
siba 3000413.2
siba 5020506.12
siba 189140.1
siba 5101401.GE
siba 2400602
siba 2000904.8
siba 2000104.1
siba 2004528.16
siba 9007101.2
siba 6003305.8
siba 2021313.16
siba 2028003.25
siba 2038903.25
siba 3011911.1
siba 2063832.63
siba 2063932.1
siba 3030801.1
siba 2056220.125
siba 2035808.355
siba 5006608.8
siba 2055620.5
siba 3014436.56
siba 2044313.63
siba 2300401
siba 5105805.1L
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siba 2100701
siba 2044113.224
siba 2100601.31
siba 2040704.1
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siba 3030301.4
siba 7016524.1
siba 2000713.16
siba 2021308.355
siba 3038826.1
siba 2071332.63
siba 2021108.1
siba 9023027.25
siba 9003706.35
siba 7000140.12,5IP
siba 9009810.12
siba 1002734.16
siba 5106005.1
siba 2071532.25
siba 5013206.1
siba 9022025.1
siba 7012540.1
siba 5105804.L
siba 2043913.2
siba 2000013.100EL
siba 2045113.4
siba 1302701.2
siba 2056322.63
siba 9000202.63DS80
siba 2073931.1
siba 2062532.315
siba 2021234.315
siba 3026713.5
siba 5006106.2
siba 172526.1
siba 7012540.2IP
siba 3019614.16
siba 179021.8
siba 2045608.16
siba 3100201
siba 1000207.2
siba 2078432.4
siba 5017501.16
siba 2038603.8
siba 2061532.63
siba 9020026.1
siba 3001013.8
siba 2038603.1
siba 7016524.2
siba 2038608.1
siba 2040404.25
siba 3000411.4
siba 2045013.16
siba 2026613.2
siba 2028220.63
siba 2012015.18
siba 2000503.315
siba 2029220.18
siba 2020908.8
siba 2021132.25
siba 199015
siba 2079152.8
siba 2028808.2
siba 2001704.1
siba 2007901.1
siba 9020125.125
siba 2078132.9
siba 5014534.3
siba 2077432.45
siba 1000507.4
siba 3035321.125
siba 9042318.7
siba 9021126.8
siba 2066331.35
siba 189000.0,5
siba 2001013.315
siba 2000013.40EL
siba 9005409.1/63
siba 2038908.2
siba 2068132.125
siba 1001101.4
siba 2066132.8
siba 2045713.63
siba 3028713.125
siba 2067132.63
siba 1000708.35
siba 3027156.25
siba 1300501.0,5
siba 3011014.315
siba 7012540.0,16
siba 6003305.4
siba 172100.1,6
siba 189140.25IP
siba 5019106.12
siba 2063532.55
siba 2045208.5
siba 2012015.72
siba 9000302.35DS95
siba 2063132.16
siba 2066032.25
siba 9022326.2
siba 1001604.6
siba 5021728.2
siba 2078032.55
siba 3015636.63
siba 5019206.4
siba 7017240.2IP
siba 5014006.5
siba 2077132.28
siba 2075332.5
siba 2061132.55
siba 2062132.1
siba 3100601
siba 2024813.2
siba 2024813.1
siba 1200710
siba 5019206.16
siba 1000504.35
siba 179021.0,63IP
siba 3021114.25
siba 3000414.25
siba 2061931.1
siba 189100.0,63
siba 2027234.5
siba 2078331.4
siba 5005806.2
siba 9022028.8
siba 2001004.3
siba 189140.1,6
siba 2027134.25
siba 2066432.16
siba 5019106.2
siba 2062731.5
siba 172000.0,7IP
siba 3023213.63
siba 3029436.1
siba 2215701
siba 3029436.25
siba 2061432.315
siba 2000004.63
siba 2061532.45
siba 9022225.125
siba 3027313.8
siba 3026813.1
siba 2000016.35
siba 2038603.6
siba 2021220.4
siba 189000.4
siba 2062332.55
siba 3015636.5
siba 9013706.3
siba 2026113.4
siba 2041204.125
siba 2044713.5
siba 179020.0,63IP
siba 2061931.9
siba 3040726.31,5
siba 2068832.25
siba 2039608.2
siba 3027313.6
siba 2004128.8
siba 2045508.16
siba 3100302
siba 2000613.4
siba 5019106.25
siba 2062332.1
siba 9020125.16
siba 5012906.4
siba 190000.1
siba 5005908.2
siba 2062832.11
siba 2047713.4
siba 2048215.231
siba 1000504.20H
siba 5106305.1N
siba 2044713.2
siba 5006106.8
siba 2073931.315
siba 3018013.2,5
siba 2000613.125
siba 9003406.12,5
siba 9021126.63
siba 2012013.355
siba 172526.6,3
siba 1000201.2
siba 2057115.577
siba 2021208.3
siba 2068152.18
siba 3027156.1
siba 2100103.1
siba 2078331.1
siba 2075331.4
siba 5005907.32
siba 2043913.4
siba 2021213.4
siba 2062832.125
siba 7017240.0,8IP
siba 5021406.3
siba 1001007.16
siba 5014006.63
siba 2061632.55
siba 2000013.35EL
siba 2079152.63
siba 5019106.32
siba 2062731.45
siba 2000704.25
siba 5019320.2
siba 3018013.5
siba 2028204.4
siba 5019006.1
siba 2021008.35
siba 2077032.45
siba 2000413.25
siba 2061731.25
siba 1300501.6
siba 2045313.125
siba 2041220.18
siba 3031216.16
siba 2001113.63
siba 2071332.28
siba 3010813.4
siba 2003102.2
siba 2055604.32
siba 2038603.1
siba 2066432.63
siba 3033313.4
siba 9008010.5
siba 5106305.1
siba 1002804.32
siba 2057115.144
siba 2066331.63
siba 2068432.63
siba 2076432.4
siba 3020313.16
siba 2061832.8
siba 3023736.125
siba 2023613.1
siba 2021008.4
siba 2000303.4
siba 2035808.125
siba 2078132.35
siba 1003301.5
siba 2000313.16
siba 2075931.4
siba 2014513.25
siba 172200.0,315
siba 179020.1
siba 2001013.25
siba 2029220.25
siba 3017911.3
siba 3034013.16
siba 2066032.315
siba 2055013.5
siba 3010213.63
siba 179120.1,25AK
siba 2048215.144
siba 3029601.1
siba 2800102
siba 2057113.315
siba 3018111.2,5
siba 3033813.25
siba 2003102.16
siba 9023027.8
siba 3020054.25
siba 2021120.63
siba 3017911.5
siba 2028234.8
siba 1102715
siba 5017906.3
siba 3029213.16
siba 5006008.63
siba 2021213.1
siba 3051311.0,5
siba 2069532.16
siba 9000302.100DS95
siba 5805307
siba 2024601.125
siba 2028220.16
siba 5020106.12
siba 5021828.15
siba 2028234.63
siba 6003434.12
siba 2063032.55
siba 2076132.315
siba 3009813.5
siba 5005808.2
siba 3011014.2
siba 2002802.8
siba 2000513.425
siba 2414401
siba 9023520.16
siba 2003101.16
siba 5021706.4
siba 2039708.45
siba 2000413.2
siba 1000734.35
siba 2023313.2
siba 2021008.125
siba 2061532.315
siba 2018920.63
siba 2071332.5
siba 2021120.25
siba 5019620.125
siba 5014034.4
siba 2067331.11
siba 179120.0,04
siba 1002907.8
siba 5006108.8
siba 2462132.3
siba 2068832.11
siba 2077652.63
siba 6006212.5
siba 5024028.25
siba 2000013.35
siba 3038626.4
siba 6006105.5
siba 5006307.0,5
siba 2045613.355
siba 5007306.1
siba 2000403.1
siba 5019320.8
siba 5006006.32
siba 2024602.25
siba 2003102.4
siba 2062132.55
siba 2103001
siba 9022020.3,15
siba 2044613.2
siba 5012606.16
siba 5021628.15
siba 2047713.6
siba 2039908.25
siba 2045508.35
siba 2021013.32
siba 5006107.2
siba 2067432.63
siba 179120.6,3
siba 3100302.3
siba 5006308.4
siba 179120.0,032IP
siba 3011054.224
siba 2023313.25
siba 7000140.0,63
siba 2021334.315
siba 3020413.5
siba 9009610.32
siba 179021.0,08
siba 5021506.2
siba熔斷器5006308-安徽天歐
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