描述
HAMAMATSU MVS-7000
變壓器繼電保護的原則
繼電保護裝置發(fā)揮保護功能要具有可靠性、選擇性、靈敏性和速動性四個特點。可靠性是繼電保護的最基本要求，要求在執(zhí)行繼電保護的過程中，正確判斷和發(fā)現(xiàn)故障，并且要發(fā)出正確的預(yù)警信號。繼電保護裝置要滿足設(shè)備運行的基本性能，不能誤動或者拒動。當變壓器出現(xiàn)短路后，還要求繼電保護裝置具有選擇性，是指在發(fā)生故障后只對保護區(qū)范圍內(nèi)出口動作，幫助維修人員判斷故障位置，減少資源浪費，不影響系統(tǒng)的整體工作性能。由于故障多在瞬間出現(xiàn)，因此判斷故障也要具有靈敏性和快速性，從性能上繼電保護裝置應(yīng)具有高度的靈敏性，一旦設(shè)備存在故障隱患，就將提供預(yù)警報告，并將故障可能范圍降到最低，使工廠可以實現(xiàn)預(yù)防先于維修，提高設(shè)備的運行效率。繼電保護裝置整體規(guī)程與靈敏度的計算方式不同，前者是在最大運行方式下進行計算的，而后者是在最小運行方式下進行計算的。靈敏度高的繼電保護裝置要能夠?qū)Χ搪伏c進行正確判斷。也就是說，無論是在最大運行模式，還是在最小運行模式下，繼電保護系統(tǒng)都要保持可靠的運作性能。要求繼電保護裝置可以識別變壓器內(nèi)部輕微匝間故障，確保保護范圍。同時，繼電保護裝置的動作要快，要在第一時間做出判斷，以便于維修人員能夠及時發(fā)現(xiàn)變壓器故障，減少運行損失。繼電保護裝置的故障判定范圍包括電廠設(shè)備的母線電壓小于有效值、大型發(fā)電機或者大容量發(fā)電機內(nèi)部故障、對人體安全造成影響的干擾信號，若單指變壓器的話，還包括電壓器內(nèi)部的線路短路、匝間短路和接地短路現(xiàn)象。另外，針對故障的電流不平衡和差動電流現(xiàn)象，均應(yīng)做出準確的判斷，從而確保變壓器的運行穩(wěn)定，促進電廠的正常運行。
產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(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，橫河等進口品牌。 專業(yè)銷售進口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
LUXTRON XINIX 1015 ENDPOINT CONTROLLER FOR DRY ETCH 101
BRONKHORST HIGH-TECH E-7310-AA GAS CONTROLLER
PACIFIC SCIENTIFIC BRUSHLESS SERVOMOTOR SC423-456-T4
PACIFIC SCIENTIFIC BRUSHLESS SERVOMOTOR SC423-002-T4
AMAT,APPLIED MATERIALS ASSY NO. 0100-11239, H/V MODULE
COGNEX 4100 VISION SERIES BOARD
WOODHEAD 5136-DNP-PCI DEVICENET CAN-BASED NETWORK CARD
KLA TENCOR IMAGE PROCESSOR,200Mh?z,VME,770-80919?5-000
KLA TENCOR IMAGE PROCESS BOARD,VME,710-8?06050-01 REV.D2
THK BALLSCREW, THK LINEAR BEARING, ACTUATOR, ROUTER
ENTEGRIS,FSI NT ELECTRONIC FLOWMETER 4400 LOT OF 3, NEW
FUJI POD UG420H-TC1 TOUCH PANEL PLC PARTS
MITSUBISHI PLC MELSEC FX2-128MT AUTOMATION PLC PARTS
PROFACE XYCOM INDUSTRIAL TOUCH PANEL,MONITOR XT 1502 T
BANNER MICRO-SCREEN MCF4212X-3,4212?R-3,4212XE-1,42?12RE-
OLYMPUS AC SERVO BA10BA32CD DBAP10BA32CDA HD GEARHEAD
YASKAWA 100W SERVO PACK,MOTOR GEARHEAD,REDUCE?R-1:33,CNC
PACIFIC SCIENTIFIC BLDC SERVOMOTOR R45G0NA-R2-NS-N?V-00
OMRON SYSMAC CS1W-CLK12-V1 OPTICAL CONTROLLER LINK UNIT
PROFACE GP2300-TC41 24V TOUCH LCD SCREEN GRAPHIC PANEL
Enlarge
SONY SCALE SH10A 082E4C5 FOR DRO,CNC, ROUTER
OMRON SYSMAC CS1G CPU44-V1 OD218 AD003 CLK21 TC102
VEXTA DC SERVO DRIVE STEPPING MOTOR ,GEARHEAD
PROFACE GPH70-LG11 24V TOUCH LCD SCREEN GRAPHIC PANEL
LEUTRON PICPORT-COLOR IMAGE FRAME GRABBER 11000 PCI BUS
OMRON SYSMAC CS1G CPU44-V1 OD218 AD003 TC102
DUNKERMOTOREN BLDC SERVO MOTOR BG65X50PL W/CONTROLLER
HP VME A2636-66013 CPU CARD, 32M MEMORY #3
TESCOM 74-2462KRM11 ULTRA HIGH PURITY VALVE MICRO
TESCOM 64-2662KRM11 ULTRA HIGH PURITY VALVE MICRO
VARIAN NW-25-H/0 VACUUM NC NOR-CAL PRODUCTS VALVE
OMRON NT30-ST131B-EK GRAPHIC INTERACTIVE DISPLAY,HMI
HUGLE ELECTRONICS, IONIZER 411N1-2 W/GUN WORKING
PARKER EMD HAUSER SERVO MOTOR HDY70C4-44S
Enlarge
PC BASED 8AXES SAMSUNG DSP MOTION CONTROLLER MMC-PV81
SONY XC-55BB CCD MACHINE VISION CAMERA,CONTROLL?ER
MITSUBISHI GRAPHIC OPERATIONS TERMINAL AA851GOT-LBD-M3
OMRON SYSMAC CS1G CPU44-V1 ID216 OD218 AD003 PA204
SINANO ELECTRIC DC SERVO MOTOR 7DA30-7SE3E 300W NIB
KURODA PNEUMATICS UNI-WIRE SYSTEM AT-HUW-Z231
SIGMA KOKI SGSP(MS)26-100 ACTUATOR BALLSCREW,ROUTE?R #2
YOKOGAWA FACTORY ACE SP21-ON CPU,XD64-3F,YD3?2-1A PLC
SIEMENS SIMATIC,6ES5928?-3UA12
OMRON SYSMAC CS1W-DRM21-V1 COMMUNICATION LINK UNIT
ICP DAS PISO-DNM100-T DEVICENET MASTER MODULE
FANUC CRT A61L-001-0076TR?-9DK 1 B TESTED/WORKING
MATROX CRONOSPLUS 7141_0001 PCI IMAGE FRAME GRABBER
Enlarge
PROFACE GP2301-LG41 24V TOUCH LCD SCREEN GRAPHIC PANEL
MATROX GENESIS GEN/X/00/8/STD IMAGE AQUISITION BOARD
WITH DIGITAL MODULE
Enlarge
INDUSTRIAL SBC,PC,IPC,PENT?IUM-4 CPU,ADVANTECH PCA-6186
FREE SHIPPING,TESTE?D-WORKING
Enlarge
2A MICROSTEP DRIVER VEXTA STEPPING MOTOR FOR CNC ROUTER
ORIENTAL MOTOR FREE S & H FEE
Enlarge
KLA TENCOR,710-8060?51-01 REV.A0 VME BOARD
KONICS THYRISTOR UNIT SPU SERIES 210V/50A
HARMONIC DRIVE DC SERVO RH-14-50-CC-SP DBAP30CA52CDA
HARMONIC DRIVE DC SERVO RH-14-50-CC-SP DBAP30CA52CDA
SIEMENS SIMATIC,VIPA SSM-BG41
SWAGELOK SS-HFS4B-HVCR4-?P30 PRESSURE REGULATOR LOT OF 7
INDUSTRIAL SBC,PC,IPC,PENT?IUM-4 CPU,ENNOCONN IP-4PGP23
FREE SHIPPING,TESTE?D-WORKING
Enlarge
NEMA SERIES GAM EPL-N34-010G RATIO 10:1 GEARHEAD
NI, NATIONAL INSTRUMENTS AT MXI CARD LOT OF 4
NOVELLUS SYSTEMS INTERLOCK BD 89-2665,90-2727?,98-3618
RADISYS SYST8K SYSTEM CPU-33B/4 VME, MVEM BOARD
PARKER VERIFLO SQ140E302PFS8MM?EV VALVE
PROFACE GP2300-LG41 24V TOUCH LCD SCREEN GRAPHIC PANEL
OMRON SYSMAC CS1W-MC221-V1 MOTION CONTROL UNIT
AB, ALLEN-BRADLEY DEVICENET 1784-PCIDS SCANNER CARD
ROTEC GmbH RASTATT VCPU302-2E00C BOARD
TOKYO ELECTRON LIMITED TEL FPDIF BOARD MAIN SUB FPD2
SONY XC-ST50 CCD MACHINE VISION BLACK/WIHTE B/W CAMERA
MITSUBISHI MELSEC PLC A3NCPU A3N CPU MODULE
INTERFACE AZI-232, AZI-234 Board
IMAGENATION FRAME GRABBER PX-500-10 VISION
PROFACE GP270-LG11 24V TOUCH LCD SCREEN GRAPHIC PANEL
Enlarge
INDUSTRIAL SBC,PC,IPC,PENT?IUM-4 Axiomtek SBC-81825VE
INDUSTRIAL SBC,PC,IPC,PENT?IUM-4 Axiomtek SBC-81821
RKC INSTRUMENT PCP TIO M-PCP-A-21N-M*A?B
TOKYO SEIMITSU FA0037C-TTL VME MVME
AVAL DATA AVME-340 TVME-340 PHOTO SIO,I/O
AVAL DATA AVME-115B MPU-05B
SIERRA MVC 750-611944-000/?AB MACROLINK MVCS 8/16 PORTS
INDUSTRIAL SBC,PC,IPC,PENT?IUM-4 CPU,ROCKEY-4784?EV
INDUSTRIAL SBC,PC,IPC,PENT?IUM-4 CPU,ADVANTECH PCA-6184
ALTAS COPCO CONTROLS AC SERVO MOTOR AHD70C4-443
Enlarge
NEMA TRUE 90 DEGREE NTR23-002 RIGHT GEARHEAD THOMSON
YASKAWA INVERTER VARISPEED CIMR-V7DT20P1 220V-3PH 100W
Enlarge
PARKER DIGIPLAN UDPS/UIC DC DRIVE SYSTEM POWER SUPPLY
TOKYO SEIMITS FA0134 LD.IO-1
TOKYO SEIMITSU FA0135C VME MVME
TOKYO SEIMITSU FA0139B BOARD VME MVME
TELTVB0004-1,VM?E BOARD,147CON,TO?KYO ELECLECTRON LTD
TELTVB3102-1 SIO VME BOARD,TOKYO ELECLECTRON LIMITED
NI, NATIONAL INSTRUMENTS AT MXI CARD LOT OF 3
OMRON SYSMAC CS1G CPU44-V1 PLC
PCI UT-0661 6190-017261B S6 EIGHT 8-20
PROFACE GP530-TC11 TOUCH LCD SCREEN GRAPHIC PANEL
CONTEC PI-64L PCI H NO.7214 DIGITAL INPUT CARD LOT OF 4
CONTEC PO-64L PCI H NO.7215 DIGITAL OUTPUT LOT OF 4
CONTEC AD12-16 PCI NO.7150 ANALOG DAGITDAL BOARD
HARMONIC DRIVE SYSTEMS RM-8-50-PM-SP2,?PX243,RD-021M8
MITSUBISHI PLC MELSEC FX2-48MR AUTOMATION PLC PARTS #2
MITSUBISHI PLC MELSEC FX2-48MR AUTOMATION PLC PARTS #1
LIGHTHOUSE INTELLIGENT DIFFERENTIAL PRESSURE CONTROLLER
INTERFACE AZI-1101a BOARD p9605235
FANUC A05B-2440-C100
VAT VACUUM GATE VALVE 01234-KA24-001/?0041 A-497266
TOKYO ELCTRON LIMITED TEL TVB6004-1 QMC3 AXIS BOARD
OMRON SYSMAC CS1W-SLK21 COMMUNICATION LINK UNIT
OMRON SYSMAC CS1W-NC213 POSITION CONTROL UNIT
HAMAMATSU LIGHT POWER METER MODEL C6080 248NM J116
hiLscher ISA DEVICENET CIF30 BSL-DNM CARD FREE SHIPPING
SIEMENS SIMATIC S7 SM323 6ES7 323-1BL00-0AA0
OREGON MICRO SYSTEMS 4AXES PC-39E MOTION CONTROLLER
CLOSE LOOF, 18 USER I/O,
CONTEC DA12-16 PCI NO.7146B DAGITDAL ANALOG BOARD
MITSUBISHI SERVO MOTOR DRIVER 400W MR-J2-40A CNC ROUTER
FREE SHIPPING AND HANDLING FEE
Enlarge
OLYMPUS AC SERVO DRIVE DBAP10CA52CDA MOTOR BC30CA52CA-
MOTOROLA MVME,VME 147-023 6000BC CPU BOARD
VME-AXIS REV.001-00 AXIS-H3 SAMSUNG AEROSPACE
PROFACE GP377-LG11 24V TOUCH LCD SCREEN GRAPHIC PANEL
Enlarge
KEYENCE BARCODE READER BL-700 SERIES BL-741 SENSOR
OMRON SYSMAC CS1G CPU44-v1 PLC
OMRON SYSMAC C200H-AD003 8-POINTS A/D ANALOG UNIT PLC
OMRON SYSMAC CS1G CPU44-EV1 PLC
THK HRW17 LINEAR BEARING / LM GUIDE/ CNC ROUTER/ L390mm
NI, NATIONAL INSTRUMENTS ISA AT-MIO-16E-10 DAQ BOARD
SIGMA KOKI Precision Rotary Stage/Table
SCHNEEBERGER /LINEAR BEARING /MR25 /CNC ROUTER/ L626mm
VEXTA,ORIENTAL STEPPING MOTOR & DRIVE HARMONIC GEARED
PH544HG2-NB-10?0:1 HARMONIC GEARED ,DC-24V CSD5807N-P
VEXTA,ORIENTAL STEPPING MOTOR & DRIVE HARMONIC GEARED
PH533HG2-NB-10?0:1 HARMONIC GEARED ,DC-24V CSD5807N-P
PARKER DIGIPLAN UD2/UIC-201 DC DRIVE SYSTEM
MOTOROLA MVME,VME 316 MODULE
STEC INC PAC-EC V2.2A
專業(yè)銷售進口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
18150087953 點擊撥打電話聯(lián)系我們