657-尊龙凯时入口

目前很多中央空调系统由人工设定的钟控装置控制。系统定时启动和定时关闭，每天长时间全开或全关，轮流运行。这样对电网冲击频繁，浪费电能惊人，而且恒温效果不佳，让人感到不适。寻找一种节能效果明显，性能稳定可靠的控制系统成为当务之急。风机和水泵是中央空调的重要部件，所以采用变频调速技术自然是最佳选择。采用变频调速技术不仅能基本保持室温恒定，让人感觉舒适，更重要的是其平均节能效果高达30％以上。中央空调系统的构成及工作原理通常的中央空调系统主要由制冷机组、冷却水组循环系统、冷冻水循环系统、风机盘管系统和冷却塔组成。

　　制冷机组通过压缩机将制冷剂压缩成液态后送蒸发器中与冷冻水进行热交换，将冷冻水制冷；冷冻水泵将冷冻水送到各房间风机风口的冷却盘管中，和空气进行热交换，再由风机将冷空气吹送到房间中达到降温的目的。而在制冷过程中制冷剂蒸发后会释放出大量热量，通过冷凝器与冷却循环水进行热交换，再由冷却泵将带走热量的冷却水送到冷却塔上，进行喷淋冷却，由冷却塔风扇加快其与大气之间的热交换，最终将热量散发到大气中去。可以看出，中央空调系统的工作过程是一个不断地进行热交换的能量转换过程。在这里，冷冻水和冷却水循环系统是能量的主要传递者。

中央空调系统的变频改造方案,变频改造的可行性可以看到，在中央空调系统中，主要有以下拖动系统：a.制冷机组拖动系统。b.冷冻泵拖动系统，由若干台水泵组成。c.冷却泵拖动系统，也由若干台水泵组成。d.风机（包括室内风机和冷却塔风机）拖动系统。

　　对于制冷机组，现常用的属于多机头制冷机组，即每套制冷机组有多台压缩机，这种机组自身配有冷量调节机构和卸载机构，运行时可根据冷冻水温度自动加载、减载，控制压缩机的开停台数，实现有级调节；同时，机组起动时可实现顺序起动各台压缩机，单台压缩机的功率小，对电网的冲击小，能量损失小，且机组在部分负荷时仍有较高的效率，已具有明显节能效果，再配置变频器进行无级调节，其节能效果不明显，因此通常不改造压缩机部分。

　　另外，一般分布在每个房间内的风机盘管系统（立式明装），其风机的电动机为单相且功率小，风机转速是由室内温控器上的三速开关控制。通过三速开关控制风机电动机的输入电压，以调节风机转速来改变送入房间的冷量。这种设备节能改造的空间不大。再则，目前变频器都是三相的，对单相电动机来说不适用，因此不用变频器改造风机盘管系统。

如果对冷冻泵进行变频改造，根据回水温度就能够很方便地实现房间温度的恒定。当回水温度高，说明房间温度也高，这时就通过变频器提高冷冻泵的转速，加快冷冻水的循环速度，使房间温度降低；反之，当回水温度低，说明房间温度低，则可以通过变频器降低冷冻泵的转速，减缓冷冻水的循环速度，让房间温度升高。需要注意的是，在各类制冷机组中，特别是压缩机制冷的设备中，冷冻水的流量调节范围有较为严格的限制。通常不能低于额定流量的75％～80％，否则机组的安全保护系统会自动切断运行以保证系统不发生冻结。因此，不论使用何种调节方法，其流量调节的范围不应低于系统的报警阈值。可将变频器的下限频率设置在一个适当值以上来解决这一问题。

　　冷却泵的变频改造冷却泵则用于完成冷却水在系统中的循环。在冷却水的循环系统中，水流进制冷机组（简称为“进水”），和其冷凝器进行热交换，带走制冷机组制冷过程中产生的热量，再由冷却泵送上冷却塔（简称为“回水”），在进行喷淋冷却后又流进制冷机组，并如此反复循环。在冷却水循环系统中，由于冷却塔的水温是随环境温度而变的，其单侧水温度不能准确地反映制冷机组内产生热量的多少。所以，对于冷却泵的变频改造，应以回水和进水间的温差作为依据，实现恒温差控制是比较合理的。温差大，则说明制冷机组产生的热量多，应通过变频器提高冷却泵的转速，以加快冷却水的循环速度，带走更多热量；温差小，则说明冷冻机组产生的热量少，就可以通过变频器降低冷却泵的转速，减缓冷却水的循环速度，以节约能源。

冷却塔散热风扇的变频改造冷却塔的散热风扇主要是用来加快冷却水在喷淋过程中的散热速度。对于风扇的变频控制可以采用开环的方式，根据季节、天气的变化通过变频器手动来改变风扇的转速。天热的时候，转速调高一些；天凉时，转速调低一点，配合冷却泵的变频调节，达到最佳的节能效果。中央空调系统的变频改造节能分析下面就对冷冻水泵和冷却水泵变频改造的节能效果进行分析。

　　用水特点在供水系统中，用户抽用的水是消耗掉的。它并不回到水泵的进水口，对拖动系统毫无反馈作用。对于中央空调系统，不管是冷冻水还是冷却水，都是循环水。循环水系统中，所用的水是不消耗的，从水泵流出的水又将流回水泵的进口处。而且，回水本身具有一定的动能和位能，将反馈到水泵的进水口。调速特点在供水系统中，当通过改变转速来调节流量时，扬程h也随之改变，并且，扬程是和转速的平方成正比的而在循环水系统中，改变转速来调节流量时，扬程并未发生变化。

　　系统改造实例我们对深圳龙岗华为生产基地的一套中央空调系统实施了节能技术改造。该系统的冷却水循环系统由3台18.5kw的电动机各带1台冷却水泵并联组成，冷冻水循环系统也是由3台18.5kw的电动机各带1台冷冻水泵并联组成的。改造时，应用ev2000－4t0185p型号的变频器来控制冷冻泵和冷却泵，通过温度闭环来调节泵的流量。可以将变频器的成本收回，从回报率上分析是可行的。当然由于各使用单位所处的地理环境位置、地区电费、中央空调的运行周期及负荷情况有所差异，所带来的经济效益也有所不同。但总体说来，平均1～1.5a均可收回成本。

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【主营产品】

1：invensys foxboro（福克斯波罗）：i/a series系统，fbm（现场输入/输出模块）顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数据通信及处理等。

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3：westinghouse（西屋）： ovation系统、wdpf系统、westation系统备件。

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micrologix/1761/1763/1762/1766/1764、compactlogix/1769/1768、

logix5000/1756/1789/1794/1760/1788、plc-5/1771/1785等。

5：schneider modicon（施耐德莫迪康）：quantum 140系列处理器、控制卡、电源模块等。

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8：motorola（摩托罗拉）：mvme 162、mvme 167、mvme1772、mvme177等系列。

9：xycom：i/o 、vme板和处理器等。

10：ge fanuc(ge发那科)：模块、卡件、驱动器等各类备件。

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14:工业机器人系统备件。

westinghouse w210m3cfcy7 reversing starter size 3 120vcoil 50hp 90a 600v

westinghouse wck53 size 5, 3 pole contact kit

westinghouse wdpf daps ac 13 vdc power supply assy. 4d33913g04

westinghouse wdpf mdx module pn: 4256a88g04

westinghouse wdpf qao analog output 20 ma pn: 2840a18g01

westinghouse wh size sz 4 a201k4cx contactor 135a 480v

westinghouse whfn323 100a 3p heavy duty safety switch

westinghouse/amptector i-a lsig/ds-206 circuit breaker xlnt

westinghouse/amptector ii-a tr/ds-206 circuit breaker xlnt

westinghouse/cutler hammer ds206 air circuit breaker

westinghouse1375d25g03lsi vert r-k-trip unit, surplus

westinghouse1777566frame unit resistors,

westinghousedetector panel type wma

westinghousem-210-2hcontactor style 1289247, surplus

westinghousemc3800circuit breaker,/cleaned/tested

westinghousestyle #1367d69g01spb external current sensor,/good cond

westinhouse numalogic pc1200-1042 programmable controller w/ nlms-1100b

weston 327  327

weston 605  605

weston f-45910-1  f459101

weston tachometer generator model 758 type e explosion proof ac

westover fv-400 video fiber microscope blue led sony 12" monitor

westronics board card cb100161-02 cb100161 rev.g

westronics inc cb100188-01  cb10018801

westronics inc cb100204-01  cb10020401

westronics inc cb100204-01  cb10020401

westronics inc pa100056-01  pa10005601

westronics inc s4e-1-300-000-000-1-11-20-30  s4e1300000000111

westronics inc vgr8-12-111-111  vgr812111111

westronics smartview svc600 svc-600-11-11-000-0 data logger touch screen

westwind d1483-04 spin motor spindle 

wf28 8mm colorimeter color meter cielab display mode del a b formula

wf2c2010-0b tb woods 10hp sensorless vector drive 

wf2c2020-ob tb woods 20hp sensorless vector drive 

wf30 4mm colorimeter color meter cielab cielch display mode del a b formula

wf30 8mm colorimeter color meter cielab cielch display mode del a b formula

wfc2003-0cht tb woods e-trac wfc ht ac inverter 

wflk-115obm bilz instrumentation

wg wandel & goltermann spm-30 pegelmesser level meter 200hz to 1,62mhz pse-30 

wg wandel and goltermann vf-pcm-tester pcm-23 vf generator receiver reference

wh cat# fdps364r 200 amp 600 volt fusible switch

wh cat# gca530 ac motor control starter size5 120v coil 3p 600v 200hp 2050a15g16

wh lc3600f 600 amp main breaker 3 phase 600 volt panelboard - e950

wh prl4b 480 volt, 1200 amp panelboard - e786

wh y/delta reduced voltage starter for refrigeration

wh/ch athsfda30100esu 100 amp automatic transfer switch - ats6

whedco 17003699  17003699

whedco 17003706  17003706

whedco 78003574  78003574

whedco 78004653/0004 m/n target ars 9 s rack chassis module

whedco 78004655  78004655

whedco 78004656  78004656

whedco 78004661  78004661

whedco 78004890  78004890

whedco 78005068  78005068

whedco 78005778  78005778

whedco cmc-0000-1-b servo control

whedco cmc-0000-1-b servo motor controlsnice 

whedco cmc-0001-1-b servo motor controller drive imc series 78004078/r9412

whedco cmc-0001-2-b motor controller cmc00012b

whedco cmc-0101-2-b  cmc01012b

whedco cmc-2071-1b  cmc20711b

whedco cmc-3161-2-b  cmc31612b

whedco cmc-4230-1-b servo controller

whedco imc-105p-1-d  imc105p1d

whedco imc-1151-1-b

whedco imc-1151-1-b 

whedco imc-1151-1-b  imc11511b

whedco imc-2070-1-b  imc20701b

whedco imc-2071-1-b  imc20711b

whedco imc-2071-1-b motor controller imc series

whedco imc-3140-1-b  imc31401b

whedco imc-4230-1-b intelligent motor controller 78003981 / 9408

whedco servo control - cmc-0000-1-b

whedco servo control - cmc-2070-1-b

whedco smd-3041-1-a servo controllerunold stock 

whedco smd-3041-2-a/smd30412a servo drive nib

whedco tgt-aiov-8-0 analog i/o module 78004661

whedco tgt-e00a-2-0 expansion axis module 78005196

whelan battery charger part#01-0285699-00c

whit mr-s11-100-base

white hydraulic pump hb18595570 293.07

white knight ap200 rebuild kit rbap200-1

white rodgers 134-20103-301u 13420103301u 25a 277v relay

white rodgers 8732esr1g1nam5b6  8732esr1g1nam5b6

white westinghouse 2d66621g01 base drive boardxlnt 

white westinghouse 7881c65g03 thrystor assembly

whittaker controls inc.meggittswitch airflow part # 160615

wiedenbach cpu 206 vers.2 wa101m.cdo cpu-206 with ram

wiedenbach cpu105-5 

wiegmann aln4302408 nsfp aln4302408

wiha 66 piece professional electricians insulated tool set tool box/32876

wiha 80 piece professional electricians insulated tool set tool box/32800

wiha 80 piece professional electricians insulated tool set tool box/32877

wiha, cementex & pelican

wika 4.5" membrane type- highpressure guage p/n 4375896 ~ type 732.25

wika/ wallace & tiernan absolute pressure gauge 0-200 mmhg mm hg 1mm 61c-1d-0200

wika/wallace & tiernan 6” absolute pressure gauge 0-800 mmhg, 61c1d0800

wilcom f6121a optical fiber identifier ofi probe 6121a

wilcom f6121a optical fiber identifier with 3 adapters.is 2s.

wilcom f6222 telecom optical fiber identifier ofi probe

wilcom plantronics optical level meter/attenuation t339-01b t312b

wilcom t247b calibrator

wilcom t339-02 op level meter t363 op trans "dual unit"

wilcoxon research power amplifier pa8 vibration shaker test accelerometer

wild heerbrugg makrozoom 1:5 inspection lense t8069

wild heerbrugg makrozoom 1:5 microscope head- rack 3 

wild heerrbrugg t16 167185 theodolite t-16

wilden m2 1" ss diaphragm pump w/ pulsation equalizer & dual flex connectors

wilden surge dampener 70-7265 707265 sd1-smp-fg-tf sd1smpfgtf tested 

wilkerson pneumatic de0-de-000-7g-02  de0de0007g02

wilkins zurn double check backflow preventer 4" 3500 osy

will test t1/ts-ds1/ds3 circuits- loaded with options

willett 2300  2300

willtek 4202s mobile service tester m101302 

wilmar rlo-70-t relay tester

wilron/anritsu 560-98k50 swr autotester, 10 mhz - 40 ghz

wiltron / anritsu site master s113b network analyzer

wiltron / anritsu sitemaster s235a network analyzer

wiltron 3114 60cm dc-18ghz 0-720 degree/ghz variable delay line rf component

wiltron 3114 variable delay line dc to 18 ghz 60cmfall clearance

wiltron 3114 variable delay line rf component

wiltron 3620-d-15825 0.5-40ghz directional coupler

wiltron 5409a 1-2000mhz scalar measurement system w/opt 02 03

wiltron 610c sweep generator

wiltron 6624a programmable sweep generator opts.01/9nreduced 8/12 

wiltron 6637a/03 sweep generator - 2-18.6 ghz, programmable, gpib

wiltron 6647a

wiltron 6647a prog. sweep generator .01-18 ghz opts 2,3

wiltron 6647a programmable sweep generator

wiltron 6647a programmable sweep generator 10mhz-18.6ghz w/opt.2 & opt.3 

wiltron site master s331a

wiltronanritsus331 site master - 25-3300 mhz, built-in signal source

windings inc. servo motor assembly p/n:1030-01-026 drc rotary encoder

windsor mpma03  mpma03

windsor mpmsi3/1s3  mpmsi31s3

windsor mpmuw2  mpmuw2

windsor mpmuw2  mpmuw2

wing corp. ic/bg52 alarm panel 6320012870093

winslow ts510a/u ~ 2187 signal generator ts510a/u=hp608d 

winsmith 2.04 hp , 7cbxm reducer

winsmith 920mdns41000dn  920mdns41000dn

winsmith 926msrs32190ft  926msrs32190ft

winsmith 930 speed reducer

winsmith cvu speed reducer 1800 rpm input, 60:1

winsmith d-90 s-equalizer speed reducer

winsmith series d90 se gear speed reducer 935 935cdsfe 1750 rpm ratio 10 to 1

winsmith speed reducer 3mctd, 270:1 ratio, rdl assembly, 56c, 3mctd-270-rdl-56c

winsmith speed reducer 924mdnd, 300:1 ratio, 56c, 924mdnd21000mm, lu-r, 924mdtd

winsmith speed reducer 935cdte, 7.5:1, 143tc or 145tc, 935cdte502xgbt, equalizer

winsmith speed reducer 935xdt, 30:1, keyed input, 935xdts4x000ek, 935xdts4x00gek

winsystems lpm/mcm ctc 400-0069-00 std bus 9-channel counter/timer card

winsystems std bus lpm/mcm-io48/96/144 rev. b board nice

wintriss dipro 1500 die protection

wintriss machine control 9612801  9612801

wintriss machine control 9674006r  9674006r

wintriss machine control 9674006t  9674006t

wintriss machine control blh100psbg  blh100psbg

wintriss machine control d42349-03  d4234903

wintriss machine control shadow36  shadow36

wintriss machine control shadow-36-t  shadow36t

wire 1/0 awg cable 500 foot reel under 

wire electronic gnv-4541-4/30  gnv4541430

wire stripper machine scrap cable and copper recycle stripping 110v 60hz

wire stripper stripping machine motorized scrap copper extractor recycling

wire stripping machine - wire stripper machine ws83 - bodine motor-powered 

wire stripping machine bws-50mf by bluedog ? tools copper stripper recycler

wire stripping machine cable copper stripper scrap 14 awg - 750 mcm romex

wire stripping machine ws212 by bluerock ? tools copper stripper recycler

wire stripping machine: bluedog bws-60 copper wire recycling stripper

wire welder lincoln electric ideal arc 400 amps 240/ 480 volt

wire winder kenrake trs-100 with olympic 1410 wire length meter

wire, eco, 12awg, black, 304.8m, 6830 bk001 2058423

wire, silicone, 15kv, 8awg, 30.5m, 390845 wh005 1843256

wirebonder bond head assembly w/ camera

wired handset with articulating probe2mextech hdv-tx2

wiremold wcr2-10/24 top & bottom section 20 gauge cellular metal raceway 10'

wiremold zb120t nsfp zb120t

wiring duct cutter with length stop

wirsbo radiant heating snowpro-411  snowpro411

witbe video quality robot supermicro cse-825mtq-r700lpb w/ hdmi switch

with calibration 30 aty

with calibration 90

with calibration 90

with calibration 90

with calibration and 90

with calibration and 90

with cfp-cb-1x2,cfp-d1-301x1,cfp-tc-120x4,cfp-cb-3x4

with e1324,e1368,e1330b

with kompass kbx-151l rt. angle gearbox

with ld2600wk 2pole 600amp molded case switch

with micrologic standard series b electronic trip lsig

with standerd acc/cal kit ols- and 1 mm rf cable

with thomson micron dt115-010 true planetary gearhead

wittenstein gear alpha v-drv 063 40:1, vdh063-mf1-40-041-og1mplb4530k

wittenstein gearlp090-m01-10-010-000

wittenstein lpb-090-m01-3-111-000 nsfp lpb090m013111000

wittenstein tp025s-mf1-10-0e1-2s alpha tp planetary gearhead 10:1

wittenstein tp025s-mf1-10-0e1-2s alpha tp planetary gearhead 10:1 mpl-a420

wittenstein vdh 100-mf1-40-071-0c1 gear speed reducer 40:1 ratio 76752

wittenstein vdh 100-mf1-40-071-0c1 gear speed reducer 40:1 ratio 76753

wittmann / sigmatek complete midi plc controller

wittmann / sigmatek nc 30e # axis encoder input card

wittmann / sigmatek ws 100 # communication card

wj watkins johnson optical sensor interface pwb 906170-001 teltec o1v 2995

wmetereaton cutler hammer

wml11225rj siemens power mod modular metering system meter stack

w?hrle db7 operating panel db71312aa021100

wolf borescope kit

wolfgang hormle arf 66/2k

wolter dtrd d0599 cd# 414 eitel press transducer

wonderware 06-2000  062000

wood ac inverter wfc4005-0c

woodhead applicom pci1500pfb pci board

woodhead sst modicon isa interface card 5136-mod-isa-v4 

woodhead sst-pfb-clx profibus scanner module - exlnt with 30antee

woodhead sst-pfb-slc 2.2.0

wood's 30 hp 460v e-trac wfc4030-0c ac inverter vs variable speed drive woods

woods ac inverter e-trac wfc4025-0c 25hp 460vac nema 4

woods e-trac ac inverter 40hp

woods wf2c4005-0b/wf2c40050b 5hp 460v ac drive nib

woods wfc5025-0c e trac 25 hp. drive 575v good takeout

woodward 2301 series load sharing and speed control 8271-442

woodward 5501-372  5501372

woodward 723 digital controller 8280-495

woodward 8271-425e in a

woodward 8271-442 j 

woodward 8271-795

woodward 9905-028  9905028

woodward 9907-005 rev. g master synchronizer & load control

woodward 9907-055  9907055

woodward governor - 5461-648 rev f - 2 channel actuator control module

woodward governor 8272-164  8272164

woodward governor proact digital plus iii

woodward motor operated potentiometer

woodward programmer in case 9907-205 rev

woodward spm-d21 series synchronizer with mains decoupling

worcester 10e39swzd120ar6 actuator out of

worcester controls series 75 electric actuator 25-75-wd3

worcester controls series 75 electric actuator with plug valve 22-75-wd3

worcester controls series 75 electric valve actuator

worcester series 75 30 754zm2 t6507 actuator large

world motor h24410

world wide electric motor c-flange mount w/base 30 hp, wwe-30-12-326tc

world wideping

worldwide electric motor mod #wwe30-18-286tc 30 hp 230/460v 1775 rpm tefcnib 

worth data lt71 nsfp lt71

wp8342c1msasco valve

wpc microtrak 9500 web deviation control keyboard

ws45 copper wire stripping machine

wtc 503-7-0324-01 cascade module

wtc medar 90078542 welding control communaction pcb,vme bus 7850-2

wtc u60-t96a welding controller u60s s113-v1.6 nadex pc-805a-00a a4-1298-1

wtc welding control module u60-t92a, s77-v1.4, #22986

wtc welding control module u60-t92a, s77-v2.5, #22988

wtc weldtronic u60-c94e welding controller,

wtc/weltronic/technitron corp wt01-t11a timer rfb

wti egs-2  egs2

wtw cellox dissolved oxygen meter 325 oxi 197

wwg mms-4303 amps/pcs/cdma mobile svc test

wwg mms-4304 mobile svc test instrument, amps, tdma

wwr international chamber model#-rf-1430 rf1430 9100647 nonunit

wykeham farrance 5-ton compression test machine model w-1005

wyttenbach ind elektronik edv 462.0401 1320 control board

x band gfe lna low noise amplifier 20458531 - lxa7550 vertex rsi maxtech

x111 nib reliance electric 0-49008-2 pc board cardpak x11

x111 nib reliance electric 0-49017-16a cardpak summing card x11

x1-11nordson 131712k pc40ac x1-1

x1500vishay irlr024tr siliconix mosfet n-ch 60v 14a 3-pin dpak ics " "

x1-51 allen bradley 1336-b030-eaf-l1 ac drive board x1-5

x200maxim max1204acap precision adc 10bit 8ch 5v 20-ssop ics " "

x20analog devices ad538sd multiplier divider realtime acu 18sbcdip ics " "

x2-11 abb 57411546 chopper control board x2-1

x2400pulse p0770.223t smt power inductor 22uh 20% 100khz 700ma ics " "

x2-41 durr behr e 0324 0006 controller x2-4

x2-41stromberg saft 133 chs pc board snubber card x2-4

x280maxim max814nesa supervisor mpu low power 3v 5v 8soic ics " "

x5-161westinghouse ka3225fs circuit breaker x5-16

x5-201 nib vickers 02-329124 directional control valve x5-20

x5-231 nib cutler-hammer hmcp050k2s motor circuit interruptor x5-23

x5-251lubriquip 162-300-690 lube sentinel ii x5-25

x5-41square d kal3625029m1212 circuit breaker x5-4

x6-21cutler-hammer 97-439-2 rhi coil w/ pc boards x6-2

x7-11 nib allen bradley 809-a16e instantaneous trip relay x7-1

x7-21robicon 560442 control board in static bag x7-2

x8-151westinghouse a210m3cac size 3 90a reversing starter x8-15

xantrex xdl35-5tp-stp dc power supply

xantrex xfr 300-4 programmable dc power supply 0-3000 tested and unloaded"

xantrex xfr 40 - 70 programmable dc power supply 0-40v 0-70a 2800w

xantrex xfr 40-70

xantrex xfr 40-70 programmable dc power supply, 0-40v/0-70a, 2.8kw

xantrex xfr 60-20 programmable power supply, 0-60 vdc, 0-20 amp

xantrex xfr 60-46

xantrex xfr20-130 dc power supplynice 

xantrex xfr35-35 0-35 volts, 0-35 amps programmable dc power supply w/gp-ib

xantrex xfr-40-30  xfr4030

xantrex xfr60-20 0-60 volts, 0-20 amps programmable dc power supply w/gp-ib

xantrex xhr 150-7 dc power supply amat 1140-00153tested

xantrex xhr 7.5-80 dc power supply 1140-00154 7.5v 80a

xantrex xhr 7.5-80 dc power supply amat 1140-00057tested

xantrex xhr33-18  xhr3318

xantrex xhr33-33  xhr3333

xantrex xhr33-33 dc power supply33v at 33 acalibrated 

xantrex xkw 100-12 dc power supply 0-100v, 0-12 amps

xantrex xkw 60-18 power supply, 0-60 vdc, 0-18 amp

xantrex xkw 80-37 dc power supply 0-80v, 0-37 amps

xbtg2130modicon schneider 5.7" touch screen xbt-g2130

xbtgt5230modicon schneider magelis 10.4" touch screen xbt-gt5230

xc4vlx80-ffg1148, ic fpga virtex-4 80k 1148-fbga

xc5vlx220t-2ffg1738c ic fpga virtex-5 220k 1738fbga xilinx factory traceable

xc68ez328pu16v qty 48 pcs motorola dragonball mc68ez328pu16vrare parts

xc6vlx240t-2ffg1156i ic fpga virtex 6 241k 1156ffg bga fpga

xcbc-n4 adalet explosion proof breaker enclosure

xcbd-n4 adalet explosion proof breaker enclosure

xcbsaq-n4 explosion proof combination motor starter

xcbsbq-n4 explosion proof combination motor starter

xd-8433-6 bolt loc switche-ok

xd-8433-6a2 bolt loc switche-ok

xeltek - superpro 5000e universal ic device chip programmer

xeltek - superpro is01 isp in-system programmer

xeltek - superpro is01 isp programmer

xeltek superpro is01 advanced isp programmer supperpro/is01

xeltek superpro is01 programmer reliable brand

xeltek superpro is01, in-system universalispprogrammer

xenko ppr-13s-hercules with attached part number vsf30-dd servo module,

xenon pulsed uv system, lamp, power supply & controller

xenon rc-1002 uv power supply sn 11349-12

xenon rc-900 uv/vis pulsed light system interface controller

xf632015 federal pacific / american / fpe molded case reconditioned

xf632020 federal pacific / american / fpe molded case reconditioned

xf632030 federal pacific / american / fpe molded case reconditioned

xf632050 federal pacific / american / fpe molded case reconditioned

xf632070 federal pacific / american / fpe molded case reconditioned

xf632090 federal pacific / american / fpe molded case reconditioned

xf632100 federal pacific / american / fpe molded case reconditioned

xfc4001-0b woods drives remanufactured

xg2128 e1 ber tester

xgf-dc4s ls lgplc xgt series expansion module 4-channel analog output current 

xgf-pd3a ls lgplc xgt series advanced positioning module line drive 3-axis

xgf-po3a ls lgplc xgt series advanced positioning module open collector 3-axis

xgf-rd4s ls lgplc xgt series rtd temperature input module 4-channel insulation

xgi-cpuh ls lgplc xgt series cpu module 6144-point iec type512k

xgi-cpuu ls lgplc xgt series cpu module 6144-point iec type1m

xgk-cpua ls lgplc xgt series advanced cpu module 3072-point 32k steps

xgk-cpus ls lgplc xgt series standard cpu module 3072-point 32k steps

xgsk6204321telemecanique xgs k6204321

xhome server incl. mac mini 1000 x data points

xhome server incl. mac mini 150 x data points

xilinx virtex 4 video starter kit sx35 edition xc4vsx35 for dsp with accessories

xilinx virtex 5 development platform ml-507

xilinx virtex 6 fpga ml605 evaluation kit