描述
繼電保護(hù)裝置應(yīng)滿足可靠性、選擇性、靈敏性和速動(dòng)性的要求:這四“性”之間緊密聯(lián)系,既矛盾又統(tǒng)一。
可靠性是指保護(hù)該動(dòng)體時(shí)應(yīng)可靠動(dòng)作。不該動(dòng)作時(shí)應(yīng)可靠不動(dòng)作??煽啃允菍?duì)繼電保護(hù)裝置性能的最根本的要求。
選擇性是指首先由故障設(shè)備或線路本身的保護(hù)切除故障,當(dāng)故障設(shè)備或線路本身的保護(hù)或斷路器拒動(dòng)時(shí),才允許由相鄰設(shè)備保護(hù)、線路保護(hù)或斷路器失靈保護(hù)切除故障。為保證對(duì)相鄰設(shè)備和線路有配合要求的保護(hù)和同一保護(hù)內(nèi)有配合要求的兩元件(如啟動(dòng)與跳閘元件或閉鎖與動(dòng)作元件)的選擇性,其靈敏系數(shù)及動(dòng)作時(shí)間,在一般情況下應(yīng)相互配合。
靈敏性是指在設(shè)備或線路的被保護(hù)范圍內(nèi)發(fā)生金屬性短路時(shí),保護(hù)裝置應(yīng)具有必要的靈敏系數(shù),各類保護(hù)的最小靈敏系數(shù)在規(guī)程中有具體規(guī)定。選擇性和靈敏性的要求,通過(guò)繼電保護(hù)的整定實(shí)現(xiàn)。
速動(dòng)性是指保護(hù)裝置應(yīng)盡快地切除短路故障,其目的是提高系統(tǒng)穩(wěn)定性,減輕故障設(shè)備和線路的損壞程度,縮小故障波及范圍,提高自動(dòng)重合閘和備用電源或備用設(shè)備自動(dòng)投入的效果等。一般從裝設(shè)速動(dòng)保護(hù)(如高頻保護(hù)、差動(dòng)保護(hù))、充分發(fā)揮零序接地瞬時(shí)段保護(hù)及相間速斷保護(hù)的作用、減少繼電器固有動(dòng)作時(shí)間和斷路器跳閘時(shí)間等方面入手來(lái)提高速動(dòng)性。針對(duì)線路長(zhǎng)出故障和易出故障的地點(diǎn)進(jìn)行有計(jì)劃有重點(diǎn)的巡視,一旦發(fā)現(xiàn)線路故障要及時(shí)處理防止出現(xiàn)跳閘事件影響電力的穩(wěn)定運(yùn)行。一般來(lái)說(shuō)電路巡線人員要具備以下幾點(diǎn)要求:首先,要具有良好的身體素質(zhì),因?yàn)闊o(wú)論酷暑還是嚴(yán)寒甚至臺(tái)風(fēng)、暴雨天氣,巡線人員都需要對(duì)供電線路進(jìn)行安全巡視,所以身體素質(zhì)的好壞直接影響巡查的質(zhì)量;其次,巡線人員要具有高度的責(zé)任心,只有巡線工作保質(zhì)保量進(jìn)行,才能確保故障的及時(shí)發(fā)現(xiàn)并處理;再次,要敢于直面問(wèn)題,當(dāng)供電現(xiàn)場(chǎng)發(fā)生臨時(shí)故障,有時(shí)是可以直接指出并加以制止,使故障可以在第一時(shí)間被排除??傊瑹o(wú)論在任何情況下都要隨機(jī)應(yīng)變,要把盡快解決故障確保供電線路安全穩(wěn)定運(yùn)行放到第一位。線路發(fā)生故障的原因有很多種,有環(huán)境因素導(dǎo)致的、有不可避免的工程遺留問(wèn)題導(dǎo)致的,因?yàn)楣收显虻亩鄻踊?,所以電力巡線人員在巡視中就更要認(rèn)真仔細(xì),盡最大力量排除電力隱患。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢(shì)價(jià)格,大量現(xiàn)貨。
主營(yíng)DCS系統(tǒng)配件
機(jī)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(lè)。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(guó)內(nèi)實(shí)力庫(kù)存商家
MOELLER ELECTRIC NZM12-800/ZM12-?800-C USPP NZM12800ZM12
KLOCKNER-MOELLE?R NZM 12-800-NA CIRCUIT BREAKER **XLNT**
KLOCKNER-MOELLE?R NZM 6 B-63/ZM6-2.1-12?-OBI-CNA BREAKER
NHI22-NZM12 MOELLER BREAKER AUXILLARY CONTACT NEW
MOELLER ANZM12 *NEW* A NZM12 EXTENSION SHAFT
MOELLER NZM 12-1250-NA 1000AMP CIRCUIT BREAKER
Klockner-Moelle?r NZM12-1250 with Trip ZM12-1200 A Amp
Klockner-Moelle?r NZM12-800 with Trip ZM12a-70-NA Amp
Bosch Servomodul SM 17/35-TA
Siemens Simodrive 650 / 690 Leistungsteil 6SC6502-0AF01
Siemens Simodrive 610 AC-VSA FBG Regelung 6SC6100-0NA11
Indramat Antriebsregelge?r?t DDS 02.1-W100-D
Indramat Antriebsregler DDS 02.1-W050-D
Reparatur von Siemens Spannungsbegr. 6RB2000-0GB01
Reparatur von Siemens Simodrive 650 6SC6500-0NA02
Reparatur von Siemens Simodrive 610 6SC6170-0FC50
Reparatur von Indramat KDA 3.2-050-3-A00-W?1
Reparatur von Siemens LT-Modul 6SN1123-1AA00-0?DA0
Reparatur von Indramat Servoantriebsmo?ul TDM 3.2
Reparatur von Indramat Antriebsregler DDS 02.1
SIEMENS SIMODRIVE 611-D 6SN1118-0DG21-0?AA0
SIEMENS SIMODRIVE 611-D 6SN1118-0DG21-0?AA1
SIEMENS SIMODRIVE 611-D 6SN1118-0DM13-0?AA0
SIEMENS SIMODRIVE 611-D 6SN1118-0DM21-0?AA0
Okaya Ersatzdisplay für Siemens Sinumerik System 8
INDRAMAT VERSORGUNGSMODU?L TVD 1.2-15-03
INDRAMAT SERVOANTRIEBSMO?DUL TDM 1.2-100-300-W1
INDRAMAT LINE FORMER NAM 1.2-08
INDRAMAT DIGITALER ANTRIEBSREGLER HDS 03.2-W100N-HS12?-0
BOSCH MODUL VM 60
Reparatur von SIEMENS SINUMERIK 840D/DE
Reparatur von Siemens 690 AC-HSA/VSA 6SC6901-0VR05
Reparatur Indramat Servoantriebsmo?dul 50A TDM 1.2-050
Reparatur Siemens Sinumerik 840C Flachbedientafe?l 6FC
SIEMENS FBG LEISTUNGSTEIL 20/40 A 6SC6120-0FE00
SIEMENS SIMODRIVE 610 LEISTUNGSTEIL 6SC6190-0FB61
SIEMENS AC-VSA FBG LEISTUNGSTEIL 30/60 A 6SC6130-0FE00
SIEMENS AC-VSA FBG LEISTUNGSTEIL 40/80 A 6SC6140-0FE00
SIEMENS AC-VSA FBG LEISTUNGSTEIL 40/80 A 6SC6140-0FE01
SIEMENS AC-VSA FBG LEISTUNGSTEIL 70/140A 6SC6170-0FC00
SIEMENS AC-VSA FBG LEISTUNGSTEIL 70/140 A 6SC6170-0FC01
SIEMENS AC-VSA FBG LEISTUNGSTEIL 70/140 A 6SC6170-0FC50
SIEMENS AC-VSA FBG LEISTUNGSTEIL 70/140 A 6SC6170-0FC51
SIEMENS AC-VSA FBG LEISTUNGSTEIL 90/180 A 6SC6190-0FB00
REPARATUR SIEMENS REGELUNGSEINSCH?UB 6SN1121-0DA11-0?AA0
REPARATUR SIEMENS FLACHBEDIENTAFE?L 6FC5203-0AB10-0?AA0
REPARATUR SIEMENS SIMODRIVE 650 6SC6508-4AA02
REPARATUR BOSCH VERSORGUNGSMODU?L VM60/R-T
REPARATUR SIEMENS 690 AC-HSA/VSA 6SC6901-0VR07
REPARATUR SIEMENS SIMODRIVE 690 6SC6901-0EA00-Z
Reparatur Indramat Umrichter RAC 3.5-200-460-L00?-W1-220
Reparatur SIEMENS Simodrive 650 TransistorPulsu?mrichter
Reparatur Siemens Simodrive 690 Komplettantrieb
PARKER MICROSTEP STEPPER MOTOR DRIVE AXL-DRIVE REV F2
Rorze Corp. RD-023MS Microstep 2-Ph Stepper Motor Drive
API P315-H microstep drive
API Controls DM-224 DM-224I-A Stepper Motor Drive
Bipolar Stepper Motor Driver, 50 Volt, 3 Amp, Microstep
Parker Compumotor CP-C Drive Stepper Microstep Control
API P315X SERIES P315X-H STEPPER INDEXER DRIVE
Compumotor S6-DRIVE Microstep Stepper Drive *GOOD PULL*
API P315-H American Precision 8A Stepper Drive 8-Amp #2
API P315X SERIES P315X-H-X3 STEPPER INDEXER DRIVE
ADVANCED MICRO MAX-410 MICROSTEP STEPPER MOTOR DRIVER
Oregon Micro Systems MD125 MICROSTEP STEPPER MOTOR DRIV
Stepper Motor API Gettys # 23E-6107FA Robot CNC Animat
Pacific Scientific P70360 Stepper Drive and Step Motor
API Parallel Turbo Stepper ST-0232 Motor/IP57B Gearbox
P.V.P. 134 4-PHASE UNIPOLAR STEPPER MOTOR DRIVE BD*XLNT
CNC SERVO or STEPPER MOTOR DRIVE PULLEY 30T 3/8″ .2p AL
CNC SERVO or STEPPER MOTOR DRIVE PULLEY 30T 1/4″ .2p AL
Parker Compumotor Microstep Drive S6-Drive w/motor
LOT 2 OREGON MD10A MICROSTEP DRIVE EAD STEPPING MOTOR
Parker S83-62 S-Series Microstep Drive Electronic Motor
Parker Compumotor A Series MicroStep Drive Motor, =
Compumotor Stepper Motor Drive Module LM-F5A-P13A
CNC SERVO or STEPPER MOTOR DRIVE PULLEY 40T 3/8″ .2p AL
CNC SERVO or STEPPER MOTOR DRIVE PULLEY 30T 1/2″ .2p AL
CNC SERVO or STEPPER MOTOR DRIVE PULLEY 20T 1/4 .2p AL
CNC SERVO or STEPPER MOTOR DRIVE PULLEY 30T 1/2″ .2p AL
CNC SERVO or STEPPER MOTOR DRIVE PULLEY 40T 1/2″ .2p AL
CNC SERVO or STEPPER MOTOR DRIVE PULLEY 40T 1/4″ .2p AL
PARKER COMPUMOTOR S SERIES MICROSTEP MOTOR DRIVE S57-51
.AMERICAN PRECISION P325 LOW EMI MICROSTEP DRIVE
Advanced Micro AMS DCB-261 Stepper Motor Driver 1A
PARKER MICROSTEP DRIVE S SERIES COMPUMOTOR P#87-011279-
3 Sanyo StepSyn 103H7124-20XE42 Stepper Motor Drive
ACDelco 25058692 Odometer Drive Stepper Motor NEW
Stepper Motor Integrated Smart Controller/Driv?er/Extras
CNC 3 AXIS STEPPER MOTOR DRIVE CONTROL SYSTEM VERY RARE
National Instruments MID-7604/7602 Stepper Motor Drive
Berger Lahr Stepper Motor Drive WD3-007.0501
Oriental Motor Custom Stepper Drive Belt Driven Track
gecko g540 stepper motor drive 4 cnc mill lathe router
PARKER DIGIPLAN CD30 STEPPER MOTOR DRIVE ***RFB***
PARKER M57-83 COMPUMOTOR STEPPER MOTOR DRIVE CODE 4
Step Stepper Automation Motor, Control, Drive T0801-02
Stepper motor drive module board ULN2003 F 51/AVR/AVR Z
SGS-THOMSON GS-D200S BIPOLAR STEPPER MOTOR DRIVE NEW
API Controls Servo Motor MAC-B343-GM60 Drive Encoder
PARKER 1408.092 DIGIPLAN STEPPER MOTOR DRIVE BOARD*XLNT
PARKER ZETA6108 DRIVE TS42B-DKS10 STEPPER MOTOR CABLE
4 Axis TB6560 Stepper Motor Drive Board+ Remote Control
SN754410 Stepper Motor Drive IC
HAYDON SWITCH & INSTRUMENT STEPPER MOTOR DRIVE 40105
Astrosyn Stepper Automation Motor Drive 23KM-K370-07V
MeiVac 150-3 Vari-Q Valve Geared Stepper Motor Drive
Parker OEM650 Compumotor Motor Drive Stepper OEM 650
BERGER LAHR STEPPER MOTOR DRIVE WS5-5.281-00 WS-5-5
SUPERIOR ELECTRIC SS2000D6 SLO-SYN MOTOR DRIVE,STEPPER
3 Axis Drive + NEMA 23 Stepper Motor 263 Oz-in CNC Kit
CNC LINEAR ACTUATOR 12″ SLIDE CNC STEPPER MOTOR DRIVE
CNC LINEAR ACTUATOR 60″ SLIDE CNC STEPPER MOTOR DRIVE
Parker 1408.092 Digiplan Stepper Motor Drive Board
Cnc Japan 5 Phase 110v MICRO STEP stepper Motor Drive
National Instruments MDI-7602 Stepper Motor Drive 115V
Parker Compumotor C-Series Drive Stepper Motor Control
CNC stepper motor DRIVE COUPLING SPYDER lovejoy
Parker Compumotor M10612011 Stepper Motor Drive MSeries
CNC stepper motor DRIVE COUPLING HALF lovejoy 1/2″ bore
CNC stepper motor DRIVE COUPLING HALF lovejoy 5/8″ bor
CNC stepper motor DRIVE COUPLING HALF lovejoy 10mm bore
Cnc 5.6 A Bipolar 2ph hybrid Micro stepper motor drive
Cnc Servo Stepper Motor Drive Power Supply 0 – 48V 480W
CNC stepper motor DRIVE COUPLING HALF lovejoy 5/8″ bore
CNC stepper motor DRIVE COUPLING HALF lovejoy 5/16″ bor
CNC stepper motor DRIVE COUPLING HALF lovejoy 12mm bore
CNC stepper motor DRIVE COUPLING 5/16″ bores
Compumotor S6-Drive S Series Parker Stepper Motor drive
IDC Danaher IM-LMT42 Impulse Stepper Motor Drive NEW
MOLINS O.E.D A02750-1709 DUAL STEPPER MOTOR DRIVE * NEW
Thorlabs: Modular Stepper Motor Drive DRV001 8mmtravel
Porescap Escap Carriage Drive Stepper Motor PJT55-F1-01
PARKER ZETA6108 DRIVE + TS42B-DKS10 1.8 STEPPER MOTOR
2035-O Stepper Motor Drive (AMP)
Berger Lahr Stepper Motor Drive WS5-5.281-00
Berger Lahr Stepper Motor Drive WD3-004.08-01
Parker/Compumot?or – Microstep Drive – AX Series
Gecko g540 stepper motor drive 4 cnc mill lathe router
Expedited shipping available
Stepper motor drive board UL2003 test board
Berger Lahr SDP5-5 five phase stepper motor drive
Lam Stepper Motor Drive Board 810-017016-001 working
Nice Compumotor M83-93 Stepper Motor Drive
API Control Stepper Driver DMI Model 224i
RTA PAVIA GMD 03 STEPPER MOTOR DRIVE MURR ELEKTRONIK
AstroSyn Step Stepper Automation Motor Drive 20-0253-01
Linear Actuator 8 inch drive, Precision Stepper Motor
Stepper Motor Drive Board (UL2003) Test Board
5V 4-Phase 5-Wire Stepper Motor+Drive Board Test Board
LOT 3 PowerMax STEPPER MOTOR / LEAD SCREW 5″-4″ DRIVE
Warner Electric Stepper Motor Drive
Digiplan stepper motor drive type PKC20240V 240 VAC
10 pcs, L297 Stepper Motor Control Drive IC Genuine ST
1pc L297 Stepper Motor Control Drive IC New Genuine ST
Mycom UPS-502-0 Stepper Motor Drive IMS-500-020-(S/?A)-L
BOXER CROSS NEAT MOTOR ASSY STEPPER DRIVE 23-00004 MDM7
Stepper motor drive board (UL2003) test board
2 Sanyo StepSyn 103H7833-03XB43 Stepper Motor Drive
Parker SX106-178 Nema 42 Stepper Motor 23 34 Drive SX6
Applied Motion PDO 3540 Stepper Motor Drive
Applied Motion PD2035 Stepper Motor Drive
CNC 4 Axis Stepper Motor Drive Board TA8435H Controller
PARKER DIGIPLAN STEPPER MOTOR DRIVE BOARD 1408.083
Parker SX8 Drive Microstep Compumotor
MELEC D-5400 Stepper Motor Drive =
COMPUMOTOR PARKER M57-83 STEPPER MOTOR DRIVE CODE A !!
Parker Digiplan PDS Series Microstep Drive PDS13/USA
Parker Compumotor AL-Drive Stepping Stepper Motor
MAGNON STEPPER MOTOR CONTROLLER BOARD DRIVE 10600
Parker Compumotor M57-83 Servo Stepper Drive & Motor
Parker/Compumot?or M57-83 Servo stepper motor drive
Parker Compumotor S6-Drive Micro-Stepper Motor NEW
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(guó)內(nèi)實(shí)力庫(kù)存商家