VLT5042PT5C
:(同號(hào))/,
公司銷售的進(jìn)口備件從國(guó)外生產(chǎn)廠家直接進(jìn)貨,
實(shí)行扁平化的銷售模式,給客戶節(jié)約了時(shí)間和成本。
我們的目標(biāo)就是國(guó)內(nèi)用戶采購(gòu)國(guó)外備件遇到困難和疑難時(shí)都能找到我們。
我們能夠及時(shí)地報(bào)出優(yōu)惠的價(jià)格和迅捷的交貨期;國(guó)內(nèi)用戶采購(gòu)國(guó)外備件受到*代理壟斷價(jià)格時(shí),
我們會(huì)給用戶提供一個(gè)比較的機(jī)會(huì),并且為客戶提供的解決方案。由于我們的訂單集中,訂貨量大,
因此我們能提供頗具競(jìng)爭(zhēng)力的價(jià)格并能夠迅速交貨,我們*以來(lái)致力于解決國(guó)內(nèi)用戶采購(gòu)國(guó)外備件中的疑難問(wèn)題,
并為廣大用戶提供電氣及工控自動(dòng)化成套設(shè)備的購(gòu)銷、現(xiàn)場(chǎng)調(diào)試等全面周到的服務(wù)。
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摘 要 介紹了智能控制器的用途、適用范VLT5042PT5C圍、分類、保護(hù)參數(shù)設(shè)定和功能,闡述了智能控制器的原理及設(shè)計(jì)時(shí)應(yīng)注意的問(wèn)題。由于智能控制器不僅增加了整定電流的選擇范圍,而且具有三段保護(hù)功能。并且可設(shè)定長(zhǎng)延時(shí)和短延時(shí)動(dòng)作時(shí)間,使產(chǎn)品更加可靠,必將在低壓電網(wǎng)領(lǐng)域的塑殼斷路器中得到廣泛應(yīng)用。
關(guān)鍵詞 低壓電網(wǎng) 智能控制器 塑殼斷路器
引言
塑料外殼式斷路器是廣泛應(yīng)用于低壓配電網(wǎng)絡(luò)系統(tǒng)中的一種關(guān)鍵元器件。據(jù)統(tǒng)計(jì),今年我國(guó)新增發(fā)電電機(jī)約達(dá)9500萬(wàn)kW,國(guó)內(nèi)對(duì)塑料外殼式斷路器需求在2000萬(wàn)臺(tái)左右,并且隨著科學(xué)技術(shù)不斷進(jìn)步,計(jì)算機(jī)、通信技術(shù)、電子技術(shù)和電力工業(yè)自動(dòng)化的飛速發(fā)展,電力系統(tǒng)的供需矛盾發(fā)生了巨大的變化。電力系統(tǒng)中對(duì)斷路器的安全、可靠性要求越來(lái)越高,對(duì)斷路器的多功能、自動(dòng)化程度高的要求也日益迫切,非智能型塑殼斷路器已不能滿足系統(tǒng)的需要。非智能塑殼斷路器一般只有雙金屬元件式的過(guò)載延時(shí)和電磁鐵的瞬動(dòng)保護(hù),測(cè)量誤差大,保護(hù)特性誤差也較大,用戶又不能調(diào)節(jié),不能聯(lián)網(wǎng)和遠(yuǎn)距離控制。各行各業(yè)都開(kāi)發(fā)新一代塑殼斷路器帶智能型控制器以滿足需求,新一代塑殼斷路器應(yīng)采用模塊化結(jié)構(gòu),基本實(shí)現(xiàn)各種附件采用模塊化,應(yīng)有三段保護(hù),做到熱磁式結(jié)構(gòu)模塊及電子式結(jié)構(gòu)模塊互換?;谶@種社會(huì)發(fā)展的需求,杭州之江開(kāi)關(guān)股份有限公司為提高供電的穩(wěn)定性和可靠性,提高輸配系統(tǒng)自動(dòng)化水平,新研制開(kāi)發(fā)了塑殼斷路器中配用的智能控制器。
1、智能控制器的用途及適用范圍
1)智能控制器適用于交流50 Hz,額定絕緣電壓690 V,額定工作電壓400 V及以下,額定電流從40 A(整定電流從16 A起)至1 250 A低壓電網(wǎng)中。
2)智能控制器不僅增加了整定電流的選擇范圍,具有過(guò)載長(zhǎng)延時(shí)、短路短延時(shí)、短路瞬時(shí)三段保護(hù),并且過(guò)載長(zhǎng)延時(shí)及短延時(shí)動(dòng)作時(shí)間可以設(shè)定。H型控制器除了具有上述功能外,還具備了現(xiàn)場(chǎng)總線的通信功能,與工控計(jì)算機(jī)或控制器聯(lián)網(wǎng)通信,實(shí)現(xiàn)配電網(wǎng)絡(luò)的計(jì)算機(jī)聯(lián)網(wǎng),在1 km范圍內(nèi)對(duì)斷路器實(shí)現(xiàn)遙控、遙調(diào)、遙測(cè)、遙信,使斷路器控制功能大大增強(qiáng)。
智能控制器按功能可分為M型控制器(面板直接設(shè)定型)和H型控制器(撥至近控在面板上直接設(shè)定,撥至遙控用編程器或從上位機(jī)上進(jìn)行設(shè)定)。
2、智能控制器保護(hù)特性參數(shù)設(shè)定和保護(hù)功能
智能控制器面板如圖1所示,智能控制器的保護(hù)功能見(jiàn)表1。1—運(yùn)行電流負(fù)載指示,紅色(HSM1z-160負(fù)載指示燈只有一盞,并且當(dāng)運(yùn)行電流負(fù)載≥100 % I r1時(shí)亮);2—MCU運(yùn)行燈,綠色(1 s閃亮);3—長(zhǎng)延時(shí)過(guò)載電流I r1整定的編碼開(kāi)關(guān);4—長(zhǎng)延時(shí)跳閘時(shí)間t 1整定的編碼開(kāi)關(guān)(zui大反時(shí)限延時(shí)T =(6I r1)2×t 1/I 2;5—短路短延時(shí)電流I r2整定的編碼開(kāi)關(guān);6—短路短延時(shí)跳閘時(shí)間t 2整定的編碼開(kāi)關(guān);7—短路瞬時(shí)電流I r3整定的編碼開(kāi)關(guān)。當(dāng)I>I r2且I ≥8I r1時(shí)為定時(shí)限,延時(shí)t 2跳閘;當(dāng)I >I r2且I <8I r1時(shí)為反時(shí)限,跳閘時(shí)間T =(8I r1)2×t 2/I2。
電流整定時(shí)須注意:I r1
3、智能型控制器設(shè)計(jì)及應(yīng)注意的問(wèn)題
智能型控制器是該系列斷路器的心臟部分,也是該斷路器的關(guān)鍵部分,動(dòng)作特性的靈敏度由該部圖1 智能控制器面板分來(lái)保證,智能控制器原理圖如圖2所示[1]。智能控制器的核心部件是CPU,選擇時(shí)應(yīng)考慮:(1) 內(nèi)置8~16位總線;(2) 8~16 KB EEPROM或FLASH;(3) 0.5~1 KB SRAM;(4) 同步或異步串口、SPI串口、I2C串口;(5) 具有優(yōu)先級(jí)的多級(jí)向量中斷;(6) 內(nèi)置看門(mén)狗定時(shí)器。
電流互感器和放大濾波電路設(shè)計(jì)是智能控制器的關(guān)鍵部件。在研制國(guó)家重點(diǎn)項(xiàng)目智能型塑殼式斷路器中的控制器時(shí),當(dāng)電流較大時(shí)(如800 A斷路器在8×800 A = 6 400 A時(shí)),互感器鐵心飽和而呈非線性,高倍電流時(shí)計(jì)算機(jī)只能用查表法進(jìn)行近似測(cè)量,造成較大的測(cè)量誤差。解決這個(gè)問(wèn)題,可從鐵心材料選型、鐵心截面比例選擇、線圈匝數(shù)、導(dǎo)線線徑等多個(gè)因素綜合考慮改進(jìn)設(shè)計(jì)。從而保證對(duì)800 A塑殼斷路器可獲得0~10000 A均線性的互感器,保證了三段保護(hù)量程內(nèi)高精度電流測(cè)量。
放大器的設(shè)計(jì)要考慮電流測(cè)量精度、電磁兼容性能,同一路互感器輸出可用兩路放大器,信號(hào)較小時(shí)用放大倍數(shù)較大的一路測(cè)量,而信號(hào)較大時(shí)用放大倍數(shù)較小的一路測(cè)量,也可以用計(jì)算機(jī)程控放大,放大倍數(shù)可取1,2,4,8倍。放大器輸入端要有抗雷擊浪涌和快速瞬態(tài)脈沖群的能力。為提高抗*力,可以考慮選擇用帶通濾波和選頻放大。
計(jì)算機(jī)通過(guò)電流互感器進(jìn)行采樣的方法一般有兩種。其一為先求zui大值,然后除以 √2 得有效值,這種方法適用于因互感器在大電流工作時(shí),有波形畸變,但幅度跌落較少,用zui大值法仍可獲得較好的測(cè)量精度,如用求面積法則會(huì)帶來(lái)較大的誤差;其二為求面積法,I =[(1/T )∫T0 i 2dt ]1/2,當(dāng)取樣電路中由于諧波所占比例較大,造成波形畸變,幅值跌落,這種場(chǎng)合可用面積法來(lái)獲取電流,其準(zhǔn)確度較高。
用電流互感器產(chǎn)生自生電源,供電給CPU及邏輯電路。若控制器中只有自生電源而無(wú)外接輔助電源時(shí)要處理好如下6個(gè)問(wèn)題:
(1)當(dāng)主回路電流較小時(shí),其能量不足以供給邏輯電路,這可適當(dāng)增加互感器匝數(shù),但要注意不要使鐵心在大電流時(shí)過(guò)早的磁飽和;
(2)要解決主回路電流較大時(shí)能量過(guò)剩,產(chǎn)生能量大于消耗能量,因而要有能量釋放回路;
(3)要解決好上電復(fù)位電路,要有一塊電源門(mén)檻監(jiān)控電路,當(dāng)電源上升到邏輯電路正常工作電壓(約4.7 V)之前,該監(jiān)控電路能產(chǎn)生一低電平,控制CPU的RESET引腳,使其在電源電壓未達(dá)正常門(mén)檻之前時(shí),C P U不工作,只有當(dāng)電源電壓正常后(大于4.7 V),RESET引腳為高電平而開(kāi)始執(zhí)行程序;
(4)要解決磁通變換器(即脫扣器)的驅(qū)動(dòng)能力,為保證可靠脫扣,瞬間要輸出較大的電流,可用大電容儲(chǔ)能瞬間釋放來(lái)解決;
(5)要解決好同一只電流互感器既要產(chǎn)生自生電源,又要取樣放大,要防止相互間的串?dāng)_問(wèn)題;
(6)要有電磁兼容措施,防止雷擊浪涌和快速脈沖群等干擾。
智能控制器與斷路器之間的機(jī)電一體化設(shè)計(jì)尤為重要,要正確處理好磁通變換器的脫扣力、彈簧力和斷路器的機(jī)械脫扣力之間的關(guān)系,保證斷路器在過(guò)電流(包括短路電流)時(shí)能延時(shí)或瞬時(shí)的正常脫扣。
4、結(jié)語(yǔ)
隨著科學(xué)技術(shù)不斷進(jìn)步,計(jì)算機(jī)、通信技術(shù)、電子技術(shù)和電力工業(yè)自動(dòng)化的飛速發(fā)展,電力系統(tǒng)中對(duì)斷路器的安全、可靠性要求越來(lái)越高,并且隨著計(jì)算機(jī)技術(shù)飛速發(fā)展,對(duì)斷路器的多功能、自動(dòng)化程度高的要求也日益迫切,由于塑殼斷路器帶智能控制器后,能提高供電的穩(wěn)定性和可靠性,提高輸配電系統(tǒng)自動(dòng)化水平,這必將會(huì)被用戶進(jìn)一步認(rèn)識(shí)和應(yīng)用。
Daniel Woodhead 81228-002 Micro Change Cord 3 Pin
Norgren Pressure Gauge 0-240 psi
GE F31T8/SPX41/U Fluorescent Lamp
Thomas & Betts B14-10 Uninsulated Ring Pressure Terminal Connector (Box of 82)
GE TQL32015 Circuit Breaker 240V 15A 3P (NNB)
Allen Bradley 140M-C-W542 Compact Busbar
Allen Bradley 140M-C-WTE Incoming Terminal Block
Allen Bradley 700-CF400D* Contactor
Balluff C49BNE00VY050M Sensor Cable
Festo 150 857 Proximity Switch
Browning 5020X1 Sprocket
Martin 40BS15HT Sprocket
Martin 60BS12HT Sprocket
GE CR205X150N Indicator Light 115V 1/4W
GE CR205X Selector Switch 600V
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Allen Bradley Selector Switch Black with 800E-2X01V
GE TE 11015 Circuit Breaker 125V 15A 1P
GE 50-254401EMEM1J?AC Percent Load Spindle Meter
Cooper PE/MT Photocontrol Assembly
GE MVR175/U/MED Multi-Vapor Metal Hallide Lamp 175W
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Simplex 5120-9930 Cable 5ft.
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GE TL412C Panelboard Load Center 120/240V 125A
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emecanique LADN22 Auxiliary Contact Block 690V 10A
GEA 0007-1992-750 Gasket Ring
GEA 8400-1265-040 Gasket
GEA 8400-1265-070 Gasket T2
GEA 8400-1265-010 Gasket
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DeVILBISS GTI-445-K2 Needle Packing
Honeywell XLSG4-S2 Genesis Fire Protective Signaling Speaker
Allen Bradley 700-NA20 Front Deck Series B
Ferraz Shawmut USCC2 Ultrasafe Fuse Holder 600V 30A
GE THQL120 Circuit Breaker 120/240V 20A 1P (White Lettering, Black Numbering)
Harting 09 45 125 1100 RJ Industrial IP 67 Data 3A Connector
MCP1012 Brush 1V
Tork 3002 Flush Mounting Photocontrol
Cutler-Hammer MSH4.5A Heater Element
Square D QO320 Circuit Breaker 240V 20A 3P
GE EP101UL Circuit Breaker 277V C10A 1P
GE V37102 V-LINE Circuit Breaker 277/480V D2A 1P
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Square D QOB250 Circuit Breaker 120/240V 50A 2P (Yellow Label)
Dayton B-150 MBL-ThreeStars V-Belt 74" L x 1.5" W 2 Teeth
Dayton B-150 MBL-ThreeStars V-Belt 74" L x 1.5" W 3 Teeth
Dukane 438-523 6-Pin Remote Connector Kit (Pack of 15)
GE Keyed Selector Switch Black with GE P9B10VN Contact Block (Key Included)
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GE Volts Panel Gauge 0-600 Range
YEW D-C Amps Panel Gauge 150-0-150 Range
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YEW D-C Volts Panel Gauge 600-0-600 Range
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GE D-C Amperes Panel Gauge 0-400 Range Type DO-91
GE D-C Volts Panel Gauge 600-0-600 Range Type DO-91
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Simplex 2088-9009 MR-201/T Relay
GE DXLCA41 Lug
Fafnir 5205K Ball Bearing
Simplex 4905-9815 TrueAlert SmartSync Adaptor (Used, In Package)
Fafnir 9107K Bearing (Box of 2)
Wiremold 5507S Spacer (Box of 9)
Brand Rex LC-400E tronics Line Card
Fafnir ER16 Ball Bearing Insert
Onron G3NA-225B Solid State Relay 25A 24-240 VAC
Moeller T0-1-102 Rotary Cam Switch 14A 600V (Base Only)
Allen-Bradley X-37886 Overload Relay Type B-2
GE CR124-D028 Overload Relay 600V Series A
GE CR124-CO28 Overload Relay 600V Series A
GE CR124-CO28 Overload Relay 600V Series A (Missing 2 Screws)
Ohmite RJS15K 15K Ohms 0.058A 750V Max
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GE 3S7505KH501A1 Relay
Allen-Bradley W52 Heater Element
Allen Bradley 71A06 Operating Coil
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Marl 054-907-22-51 Black Out Light 555mm 24 VDC
Allen-Bradley 120922 MTR Transformer 5 OHM .22 MFD REV. 02
Reliance ERN 60 Economy Fuse 60A 250V Class H
GE CR305X146C Surge Suppressor 120V 60Hz
YEW D-C Amps Panel Gauge 40-0-40 Range
Browning H 7/8 Split Taper Bushing
Browning H 1/2 Split Taper Bushing (NIB)
Browning H 5/8 Split Taper Bushing
Browning H 1 1/4 Split Taper Bushing
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FLEETRITE L28503 Heavy Duty Belt
FLEETRITE L17446 Heavy Duty Belt
FLEETRITE L4060435 Heavy Duty Belt
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NAPA 17535 Automotive Belt 31/64" x 69 3/8"
NAPA 09533 Automotive Belt 25/64" x 38 1/8"
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NAPA 18285 Automotive Belt 31/64" x 72 3/8"
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Cooper Bussmann CHCC Fuse Holder 600VAC 30A 2P (Black Face, Indicator Light)
Cooper Bussmann Midget 10X38 CHM Double Fuse Holder 30A (Red Face)
emecanique ZB2BD5 Selector Switch Operator Head
Lutron NT-1PS-WH Single Pole Switch 120/277VAC 60Hz 20A
Brad Harrison 45300-002 Nano-Change Molded Connector and Cable
GE Flush Pushbutton Red with CR104P Contact Block
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Reset Pushbutton Red with D-72119 Base
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Square D 9001-TP1 Pilot Light White
LSI Industries 16196601BRZ Bolt-On Mounting Arm
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Westinghouse BF30A Control Relay 300V 10A 3P (Broken Corner)
Square D DD185 Overload Relay Thermal Unit
I.T.E. QP1-B030 Circuit Breaker 120/240V 30A 1P
Siemens QP150 Circuit Breaker 120/240V 50A 1P
Gould Q130 Circuit Breaker 120/240V 30A 1P
Buss 1BS103 Fuse Block
Westinghouse QNPL2020 Quicklag P Circuit Breaker 120/240V 20A 2P
Hammond 166L24 Transformer 115V 60 Hz 48VA
Control Concepts I-102 ISLATROL Active Tracking Filter
Allen Bradley TA-473 Contactor Coil 110/120V 50/60 Hz
Amphenol 20-51039 Connector Block
2043PCEMA Capacitor
Phoenix Contact UMK-SE 11,25-1 Connector Block
Contactor (Parts Only)
Newman C54414E020 Sanitary Gasket 51mm (Bag of 4)
Brad Harrison AWM-2661 Cordset 5 Pole Female Connector
Banner Q10RP6RQ Photoelectric Receiver
GE CL02A310T Contactor 600V 32A 3PH (Used)
Pass & Seymour L630-P Turnlok Plug 250V 30A
Lithonia ELT50 Emergency Light (Missing Lamps, Lamp Ring, Batteries)
mcPhilben 55L112/27R Emergency Exit Light (Used)
Hyster 232362 Packing
Lennox 75H90 EBR1-1 Blower Relay Kit
Lithonia AF 1 6AR TRT TRIM U Specular Open Reflector
Potter & Brumfield KUL5A15S/120 Relay
Buss J60030-2PR Fuse Holder 600V 30A 2P
Gould Shawmut 60303J Fuse Holder 600V 30A 3P
Buss J60030-3C Fuse Holder 600V 30A 3P
Gould Shawmut 60302J Fuse Holder 600V 30A 2P
Marathon F60A1B Fuse Holder 250V 60A 1P (Used)
Ohmite 995-5B Resistor 4K Ohm 5W 8127 (Pack of 10)
R-K Electronics RCY6A-30V R-C Network Filter
Omron H3YN-4 Timer Relay with Omron PYF08A Relay Socket
Omron MY4N Relay 110/120 VAC with Dayton 2A584 Relay Socket
Square D 9001 TR-1 Pushbutton Operator Series A Black
Lithonia APR PAR30 6AR TRIM U Specular Clear Cone
ZAP PlasmaTherm T-0066 Welding Air Electrode
Marshalltown Pressure Gauge 0 to 30 PSI, 0 to 200 kPa
Allen-Bradley 871A-BP18 Mounting Bracket Cylindrical Proximity Accessory
Allen-Bradley 700-HA32Z24 Relay 24 VDC Series A with Curtis RS8 Relay Socket
Arrow-Hart Hart-Lock Receptacle 20A 250V NEMA L15-20 with Crouse-Hinds FS-1
Simplex 4906-9151 Wall Mount Speaker with Non-Addressable Strobe (Used)
Cutler-Hammer GHB1020 Industrial Circuit Breaker 277V 20A 1P
TOA Corp. F-121CM Ceiling Speaker System (Missing Front Grille)
Corcom 20VK1 RFI Fliter
Gentex AVS44R Synchronization Control Module (Housing Only)
Allen-Bradley 700-HC24A1 Relay 120VAC Series B with 700-HN128 Relay Socket
Allen-Bradley 700-HF33Z24 Relay Series B with 700-HN138 Relay Socket Series A
Allen-Bradley 700-HF33Z24 Relay 10A Series D with 700-HN126 Series A
Allen-Bradley 700-HA32Z12 Relay 250V 10ASeries D with P & B 27E891 Relay Socket
Allen-Bradley 700-HA33Z12 Relay Series D with 700-HN126 Relay Socket Series A
Allen-Bradley 700-HA33Z12 Relay Series D with P&B 27E892 Relay Socket
Allen-Bradley 700-HK32A1-4 Relay Series A with 700-HN122 Relay Socket Series A
Allen-Bradley 700-HC54A1 Relay Series A with 700-HN128 Relay Socket Series B