描述
DKC01.3-100-7-FW
三相系統(tǒng)中發(fā)生的短路有4種基本類型:三相短路,兩相短路,單相對地短路和兩相對地短路。其中,除三相短路時,三相回路依舊對稱,因而又稱對稱短路外,其余三類均屬不對稱短路。在中性點接地的電力網(wǎng)絡(luò)中,以一相對地的短路故障最多,約占全部故障的90%。在中性點非直接接地的電力網(wǎng)絡(luò)中,短路故障主要是各種相間短路。發(fā)生短路時,電力系統(tǒng)從正常的穩(wěn)定狀態(tài)過渡到短路的穩(wěn)定狀態(tài),一般需3~5秒。在這一暫態(tài)過程中,短路電流的變化很復(fù)雜。它有多種分量,其計算需采用電子計算機。在短路后約半個周波(0.01秒)時將出現(xiàn)短路電流的最大瞬時值,稱為沖擊電流。它會產(chǎn)生很大的電動力,其大小可用來校驗電工設(shè)備在發(fā)生短路時機械應(yīng)力的動穩(wěn)定性。短路電流的分析、計算是電力系統(tǒng)分析的重要內(nèi)容之一。它為電力系統(tǒng)的規(guī)劃設(shè)計和運行中選擇電工設(shè)備、整定繼電保護(hù)、分析事故提供了有效手段。電氣線路上,由于種種原因相接或相碰,產(chǎn)生電流忽然增大的現(xiàn)象稱短路。相線之間相碰叫相同短路;相線與地線、與接地導(dǎo)體或與大地直接相碰叫對地短路。在短路電流忽然增大時,其瞬間放熱量很大,大大超過線路正常工作時的發(fā)熱量,不僅能使絕緣燒毀,而且能使金屬熔化,引起可燃物燃燒發(fā)生火災(zāi)判斷電路短路的方法有很多,上文為大家列舉的就是其中的兩種比較常見的做法,由于應(yīng)用的都是初中課本中的物理知識,因此相對而言還是比較簡單的操作。除此之外,考慮到實際生活情況,我們還從另外一個角度深入分析,比如關(guān)于電路短路的原因危害等等板塊的知識就在上文有所涉及。當(dāng)然最好還是能夠在必要的時候求助維修人員,以防造成不必要的損失。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門子,摩托羅拉,安川。力士樂。ACSO,橫河等進(jìn)口品牌。 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家
Bosch CNC CPU 1070075543-101 Neuwertig
Bosch CNC Servo CPU 1070075543-101 Neuwertig
Bosch Indramat Robot Control CNC RHO3.0 1070075643
Bosch CNC Servo Unit 048673 047926 204401 101401
Bosch CNC Servo Unit 047926-204401
Bosch CNC Baugruppe CP
Bosch CNC Karte Board
Bosch CNC CPU CP/MEM3 056248-104401 Rexroth 056248 RH01
Bosch CNC CPU CP/MEM3 056311-104401 Rexroth 056311 RH01
Bosch CNC Servo Unit 1070070618-101
BOSCH CNC BF315T Bedienfeld Neuwertig
Bosch CNC Servo PS 200 Power Supply 052910-309110 Top
Bosch CNC PS 200 Power Supply 052910-309110 Neuwertig
Bosch CNC Servodyn SM 5/10-TC1 1070075973-103 Rexroth
Bosch CNC Servodyn SM 10/20-TC 060840-205 Rexroth SPS
Bosch CNC Servodyn SM 5/10-TC 060839-102 Rexroth SPS
Bosch CNC Servodyn SM 5/10-TC 060839-203 Rexroth SPS
Bosch CNC Servodyn SM 10/20-TC 060840-104 Rexroth SPS
Bosch CNC Servo m.i Modul 1070070618-101 Neuwertig
Bosch CNC Steuerung IQ120 IQ 120 Panel
Bosch CNC NC-SPS I/O-S 1070071202-103
Bosch CNC VM 50/B-TC 3/PE 060838-105 SPS Servodyn VM 50
Bosch CNC VM 50/B-TC1 060838-112 3/PE Rexroth SPS VM50
Bosch CNC Servo Board 1070080652-101
Bosch CNC Ps75 047181-202410 PE 1843/00 RH01 Powersup.
Bosch CNC Ps75 047181-209110 PE 1843/01 RH01 Powersup.
Bosch CNC Servo E-A24/0.2 Modul 068349-101401 Top
Bosch Servo CNC SE200R Digital Schraubersteuer?ung Top
Bosch CNC Baugruppe Servo 5
Bosch Servo CNC SE200R Digital Schraubersteuer?ung Top
Bosch CNC E-A24/0.1
Bosch Servo CNC SE200R Digital Schraubersteuer?ung Top
Bosch CNC CP 047245-204401
Bosch CNC E-A24/0.2 068348-101401 052099-106401 RH01
Bosch CNC Servo 066747-102401 RH01 066747 SPS Rexroth
Bosch CNC E-A24/0.2 068347-101401 Rexroth RH01 068347
Bosch CNC Servo 048413-106401 048413-105303 RH01 A202
Bosch CNC E-A24/0.1 056368-102401 Rexroth RH01 A203
Bosch CNC E-A24/0.1 056368-102401 Rexroth RH01 A204
Bosch CNC DV 047109 046689 046680 047109
Bosch CNC Servo E-A24/0.2 Modul 1070068347-101 Top
Bosch CNC PS200 Power Supply 052910 PE2189/01
Bosch CNC PS200 Power Supply 052910 PE2189/01
Bosch CNC Baugruppe PS 100
Bosch CNC Servo E-A24/0.1 Modul
Bosch CNC PS100 Power Supply 044619-108
Bosch CNC MEM 050917-102 Memory Board
4 Stück Bosch CNC Platinen u.a. 1070056309-104
Bosch CNC Module 1070070456-102 Neuwertig
Bosch DC60 Bedienterminal Display Digitronic neu CNC
Bosch CNC Baugruppe MEM
Bosch CNC E-A24/0.1- 24VDC in/out 048478-101401
BOSCH CNC PS100 044619-108 Power Supply -NEU-
Bosch CNC Servo Memory Card Eprom 1070079028-102
Bosch Servodyn ASM 50-TA 50A 053060-109 (Nr. 1)
Bosch Servodyn ASM 50-TA 50A 053060-109 (Nr. 2)
Bosch Rexroth Servodyn ASM 10 ASM10 047838-306
Bosch Rexroth Servodyn ASM 10-T ASM10-T 047838-402
Bosch Rexroth Servodyn ASM 10-T ASM10-T 047838-402
Bosch Rexroth Servodyn SM 50/100-T 1070077370-106 50A
Bosch Rexroth Servodyn SM 50/100-T 1070077370-106 50A
Bosch Rexroth Servodyn SM 50/100-T 1070077370-106 50A
Bosch Rexroth Servodyn SM 50/100-T 1070077370-106 50A
Bosch Rexroth Servodyn SM 50/100-T 1070077370-108 50A
Bosch Rexroth Servodyn SM 50/100-T 1070077370-108 50A
Bosch Rexroth Servodyn SPM17 SPM-17 047846-307
BOSCH Servodyn Achsmodul SM35/70-T 1070077369-106
BOSCH Servodyn VM60 -T 1070077371-105 VM 60-T
Bosch Servodyn SM 18/60-GC16 1070917167-102 (Nr.10)
Bosch Servodyn SM 18/60-GC16 1070917167-102 (Nr.12)
Bosch Rexroth Servodyn SM 5/10-TA T/A 055127-105
Bosch Servodyn SM 18/60-GC16 1070917167-102 (Nr.11)
Bosch Rexroth Servodyn Controller SM 25/50-TC1 25A
Bosch Servodyn SM 25/50-TC1 065670-105 (Nr.6)
Bosch Servodyn SM 25/50-TC1 065670-105 (Nr.7)
Bosch Servodyn SM 25/50-TC1 065670-105 (Nr.8)
Bosch Servodyn SM 25/50-TC1 065670-105 (Nr.9)
Bosch Servodyn SM 25/50-TC1 065670-105 (Nr.10)
Bosch Servodyn SM 25/50-TC1 065670-105 (Nr.11)
Bosch Servodyn SM 25/50-TC1 1070075976-103 (Nr.12)
Bosch Servodyn SM 25/50-TC1 1070075976-103 (Nr.13)
Bosch Servodyn VM 7,5/BE-G 1070918573-101 (Nr.13)
Bosch Rexroth Servodyn Controll.SM 35/70-T,047824-?320
Bosch Rexroth Servodyn Controll.SM 35/70-T,047824-?321
專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅
15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家