描述
電力系統(tǒng)—— 由發(fā)電機(jī)、配電裝置、升壓和降壓變電所、電力線路及電能用戶所組成的整體稱為電力系統(tǒng)。中性點(diǎn)位移:在三相電路中,電源電壓三相負(fù)載對(duì)稱的情況下,如果三相負(fù)荷也對(duì)稱,那么不管有無中性點(diǎn),中性點(diǎn)的電壓均為零。但如果三相負(fù)載不對(duì)稱,且無中性線或中性線阻抗較大,那么中性點(diǎn)就會(huì)出現(xiàn)電壓,這種現(xiàn)象稱為中性點(diǎn)位移現(xiàn)象。
產(chǎn)品廣泛應(yīng)用于:電力、石油、礦井提升、港口、供熱、燃?xì)?、供水、污水處理、冶金、造紙、紡織、化工、水利等現(xiàn)代化工業(yè)領(lǐng)域!
我們這里有您急需的停產(chǎn)備件,
優(yōu)勢(shì)現(xiàn)貨,詢不到的,買不到的,請(qǐng)聯(lián)系我們!
絕 對(duì)優(yōu)勢(shì),絕 對(duì)低價(jià)!絕 對(duì)正品,優(yōu)質(zhì)的產(chǎn)品,一流的服務(wù),充足的庫存,
歡迎來電詢價(jià),我們將會(huì)給您最優(yōu)惠的價(jià)格!
主營:世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
⑥銷售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。
⑧Invensys Foxboro(福克斯波羅):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場(chǎng)輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
⑨Siemens(西門子):Siemens MOORE,Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth(博世力士樂):Indramat,I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。
◆Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
Nortel NTN423BH Optera Metro 3500 Shelf Processor
One-day shipping available
NORTEL BCM ATTENDANT CONSOLE S/W LICENSE AUTH.CODE
1 Nortel BCM50 r3 4×12 BCM 50 3.0 r3.0 10 m7310 phone
with updated patches loaded
1 NEW Nortel BCM50 r6 4x8x8x2x2 BCM 50 r6.0 6.0 bundle
with updated patches loaded
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Nortel NTCA10EA
Alteon 180E Aceswitch Nortel Network Server Switch
Lot of(20)Norstar Nortel T7316 Telephone NT8B27 Char.
20 Nortel Norstar Meridian M7310 Phone NT8B20 Black Ref
NORTEL 0x32 NORSTAR MODULAR ICS W/7.1 SOFTWARE NEW
Northern Telecom/Nortel NT8D53BB Pwr DistUnit AC”NEW
NORTEL NORSTAR MICS TELEPHONE SYSTEM WITH PRI KEYCODE
NORTEL NORSTAR MICS TEL SYSTEM WITH ACTIVE PRI KEYCODE
NO REASONABLE OFFER REFUSED
Nortel NTN414AB01 OM3500 VTX 48 OC-12 Refurbished
Nortel NTGB51TB01 242432 Card Refurbished
Nortel Norstar Modular ICS with Callpilot 100 4 Phones
Complete digital telephone system with voicemail
Nortel Networks 32 Mailbox Upgrade
Expedited shipping available
Nortel Business communications manager NT7B10AABB
Nortel Norstar CICS Phone System Meridian T7316E
Expanded with(4)Phones+CP100 Voicemail Phone System
2 NICE Nortel CARD CAGE CPCI CORE NET AC/DC NT4N40ACE5
Nortel BLN-2 Backbone Link Node 2 71000 Router*LOADED*
Nortel Norstar MICS with T1 card and Callpilot V/mail
NORTEL T7316E-M7100 Telephone System
Nortel 8301AC 1140/1770 Watt Power Supply DS1405A14-E5
73P9057-BladeCenter Nortel layer 2-7 Gigabit Ethernet
New!Nortel Norstar VoIP Gateway-NT9B10AAAA
One-day shipping available
Nortel Business Voice Mail 10-Used Office Phone System
Nortel MICS Startalk Flash Business Phone System M7310
Nortel Gigabit Ethernet Switch 5520-24T-PWR-AL1001A06
Expedited shipping available
Nortel Shasta 5000 Control Management Card NTJT22DA
Nortel Fast Ethernet Line Card NTJT36CA
Nortel Office Business 12-Phones Key Telephone System
NORTEL NTAB9825 CALL PILOT 150 3.0 W/POWER SUPPLY
Nortel BCM 200 3.7 Base System(NT7B10AAEH,NT7B10AAFL)
Nortel Contivity Extranet Switch 4500
New!Nortel Norstar CallPilot Call Pilot 150 Voicemail
One-day shipping available
NEW Nortel BCM50 R5.0 BCM 50 NTBU3174 w 4x8x2x2 IP+VM8
Nortel BCM200 3.7 Base System-Standard-NT7B10AAFL
One-day shipping available
Nortel,NTC03110SYE6 BCM450 R1 CAPACITY EXP CARD
Nortel ASF-5105 ALTEON SWITCHED FIREWALL EB1639045 NIB!
NORTEL DM1401096 CONTIVITY 1100 EXTRANET SWITCH 163092
Nortel Norstar CICS System 4×16 CI,7.1,CallPilot 100
One-day shipping available
Nortel 5520-48T-PWR POE SWITCH
NORTEL OCTAL PORT SYNC 32MB FRE2-060E ILI AG2104092
NORTEL OCTAL PORT SYNC 64MB FRE2-060E ILI AG2104094
Nortel BCM 450 Voice Messaging 32 Seat Code NTC01021KC
Nortel,NTKC0227 BCM50 VOIP GTW 8 TRUNK AUTH CODE
NORTEL SWITCH 4526T ETHERNET 10/100MBPS AL4500E03E6
Nortel Modular ICS 0x32 Cabinet With 7.1 Software
Nortel Norstar CICS 4×16 Core Unit w/7.1 Software Bund
NORTEL NETWORK ADAPTER SERIAL AF2104006
NORTEL ETHERNET 10GBPS 10GBASE-SR XFP AA1403005
Nortel,NTKC0206 BCM50 VOICE MESSAGING 16 SEAT AUTH C..
Nortel Norstar Telephone System 8 Lines 10 Phones M7310
1 NEW Nortel BCM50 r1 4x16ipx10 replace CICS 4X16 CP100
with updated patches loaded
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NORTEL 8005AC AC POWER SUPPLY 100-240V DS1405012-E5
NORTEL BAY NETWORKS 71000 BLN-2 BACKBONE ROUTER LOADED
Nortel Switched Firewall Accelerator 6600 EB1639113-E5
Nortel Switched Firewall Director 5026 P/N:EB1639131E5
NORTEL SHASTA 5000 SSC-II Subscriber Service Card
NORTEL NTQA38JA
One-day shipping available
Nortel Networks AL1001E01 Baystack 5510-48T Switch E5
48 Port 10/100/1000Bas?e-T Stackable Switch RoHS Version
One-day shipping available
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Nortel AL2001E20 BAYSTACK 460-24T-PWR SWITCH
NORTEL SR3120 4 Port AC Chassis Model#SR2102001
Expedited shipping available