描述
零线在变压器端是和大地相联的，由于从变压器到用户的零线有一定的电阻，所以在用户端零线和地之间电压往往不为零，假如没有地线的话，若电器发生故障，零线或火线与用电器金属外壳连接，那么用电器和大地之间的电压就不为零，所以是不安全的，这时如果零线断开的话，那么是很危险的。地线是用户就近接地的一条线，在正常情况下与大地的电压为零，良好的地线与用电器的金属外壳相连，在电器发生故障时，能确保外壳与地的电压为零，这样就起了安全保障作用。
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主营：世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse（美国西屋）系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse（西屋）：OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys 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。Invensys Triconex:冗余容错控制系统、基于三重模件冗余（TMR）
结构的zui现代化的容错控制器。
⑨Siemens(西门子)：Siemens MOORE，Siemens Simatic C1，Siemens数控系统等。
⑩Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动模块等。
◆Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。
ABAXIS PICCOLO 100-1000 PORTABLE CHEMISTRY ANALYZER
COHERENT INNOVA 90 LASER With POWER SUPPLY/CONTROLLER
CRYOTIGER 1 T1102-13-000-30 CRYOGENIC REFRIGERATION SYS
AE/AMAT HFV 8000 3155083-151 5KW RF Generator
LECROY IF001UTA-X SAS-SATA-INFUSION PROTOCOL ANALYZER
EDWARDS QDP40/QMB250F DRY PUMP/MECHANICAL BOOSTER
ADEPT 10332-22000/30332-22350 SIO/IDE BOARD ROBOT
NESLAB HX-50 1250W/115V RECIRCULATING CHILLER
THERMO NESLAB MERLIN M33 RECIRCULATING CHILLER
OLYMPUS WM-D60 MOBILE WORKSTATION W/SCOPE HANGER
PFEIFFER VACUUM TPH 180H U DN 100 ISO-K,2P TURBO PUMP
Thermo Neslab Merlin M25 115V Recirculating Chiller
OLYMPUS WM-D60 MOBILE WORKSTATION W/SCOPE HANGER
OLYMPUS WM-D60 MOBILE WORKSTATION W/SCOPE HANGER
LEYBOLD MAG.DRIVE L TURBO PUMP CONTROLLER
VALHALLA SCIENTIFIC 2301 DIGITAL POWER ANALYZER
PROGRAMMABLE SINGLE PHASE
OLYMPUS WM-DP1(DOUBLE WIDE)MOBILE WORKSTATION
TDI/JUNIPER ERX-2400-PWR 19″3U MPS POWER SUPPLY RACK
ASPECT T-1 24 PT BYPASS UNIT W/RING VOLTAGE GENERATOR
ASSOCIATED RESEARCH 6554SA QUADCHEK ANALYZER W/GPIB
ENI DCG-100 DCG6M-A112000010P 5KW DC PLASMA GENERATOR
OLYMPUS MAJ-1430 ENDOSCOPY VIDEO PIGTAIL CABLE
ALCATEL 2033 DUAL STAGE ROTARY VANE VACUUM PUMP
HP 6033A 0-20V/0-30A 200W DUAL DC System Power Supply
ADEPT 10332-22000 SIO2/IDE HD UPGRADED TO 30332-22365
Brook Hansen WD132SD 5.5 KW/3-PH/RPM 1740 AC Motor NEW
EBARA HV-8 8″CRYO TURBO VACUUM PUMP
GIGA-TRONICS 8542C DUAL CHANNEL UNIVERSAL POWER METER
ADEPT PA-4 30336-31000R ROBOT CONTROLLER CHASSIS
STRYKER ENDOSCOPY X6000(REF 220-185-000)LIGHT SOURCE
SIEMENS 6ES7414-2XG01-0AB0 CPU 414-2 Module Simatic S7
BARNES SE51AU SUBMERSIBLE NON-CLOG.5 HP PUMP(NEW)
NOVELLUS 02-103970-00 MODULE CNTRLR,P166/64 CONTROLLER
FLUKE 123 Series INDUSTRIAL SCOPEMETER 20 MHz
NOVELLUS 02-133876-00 ASSY SYS CONT,P166/64 CONTROLLER
CTI CRYOGENICS 8112099G009 CONTROLLER CABLE 96G23 AH
STRYKER ENDOSCOPY Q5000(REF 220-180-000)LIGHT SOURCE
HP 54111D 2CH/500MHz Digitizing Oscilloscope
AE/RFPP LF-5 500W Water Cooled RF Generator
ALCATEL MDP 5011 CERAMIC MOLECULAR DRAG PUMP 7.5 LPS
CTI Cryogenics Cryo-Torr 7 High Vacuum Pump(HELIX)
Adept 10332-11400 MI-3 Motion Process Controller Board
HP 8568A SPECTRUM ANALYZER W/85662A DISPLAY
Fluke 96B SCOPEMETER Series II 60 MHz
Adept SCSI VME SIO 30330-12350/10330-12350 MODULE ROBOT
STRYKER SIDNE SUITE INTEGRATED CONTROL 240-020-900
SCIENTIFIC ATLANTA DYNAMICS SD380 SIGNAL ANALYZER
SIEMENS SIMATIC 6ES5 304-3UB11 S5 INTERFACE MODULE(NEW)
NSK LH25 Z Actuator Qty4 Linear Motion Guide Rail Qty2
HP 16500B W/3-16557D/1-16520A Logic Analysis System
NOVELLUS 02-8105157-00 ASSY,SYS.CONT,P166/64,24V
NOVELLUS 02-8105005-00 MOD CNT,P166,24V,W/8 RS232
FORCE SPARC CPU-1E/4 600-11566-101 VME PROCESSOR BOARD
SOLOS ENDOSCOPY ELS-2 XENON ARC AUTOMATIC LIGHT SOURCE
TOHNICHI 2.4 BTG A TORQUE GUAGE 2.4-0.05 LBF-IN
DAYTON 3N376B 3-HP/3-PHASE/AC MOTOR(NEW)
BALDOR JMM3613T/5 HP/3 PH/AC INDUCTION MOTOR
GW GPC-3030D DUAL TRACKING W/5V FIXED DC POWER SUPPLY
Adept Technology 10332-00500R VJI JOINT INTERFACE BOARD
LYTRON RC006 KODIAK RECIRCULATING CHILLER
STRYKER ENDOSCOPY SERFAS RF GENERATOR 278-100-000
Adept Technology 10332-00505 EJI JOINT INTERFACE MODULE
ROHDE&SCHWARZ URV35 LEVEL/VOLT METER 1020.0002.03
HERAEUS INSTRUMENTS BIOFUGE 15R WITH DIGITAL DISPLAY
HVA 21241-0609R Vacuum Gate Valve Pneumatic 6″
SOLOS ENDOSCOPY VCM-2 GS 9400S
LEYBOLD INFICON IQ200 CONTROLLER VACUUM IQ 200
Adept Technology 10332-10250 VGB MODULE ROBOT
Adept Technology 10332-00500 VJI JOINT INTERFACE MODULE
ABB S4N+SACE PR211 600V 250A S4 CIRCUIT BREAKER
Panoview 92″Fixed Frame Graywolf II Projector Screen
NOVELLUS 02-132030-00 ASSY MOD CONT,P166/64 CONTROLLER
MKS TYPE 649/649A HE 10Torr/10 SCCM Pressure Controller
PARKER 4450-DM PRECISION LINEAR SLIDE
OKI DX-250/255 PRECISION DISPENSING SYSTEM DX 250(NEW)
STRYKER ENDOSCOPY QUANTUM 4000 LIGHT SOURCE
LECROY CATC SAS001MG SAS/SATA EXERCISER POD
UNIT UFC-1100A 100 SCCM MFC MASS FLOW CONTROLLER(NEW)
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