GE IC697MDL240

GE IC697MDL240

建筑物的防雷是一門古老的技術(shù)，但是防雷技術(shù)在近二十年發(fā)生了很大的變化，其中重要的是在防雷概念上有如下幾點轉(zhuǎn)變：

　　1)防雷的重點從人身和電氣設(shè)備的安全轉(zhuǎn)變?yōu)橥ㄓ嵑托畔⑾到y(tǒng)的安全。過去建筑物的防雷技術(shù)以防直擊雷為主，側(cè)重防機械性破壞和雷電反擊;現(xiàn)在則以防感應(yīng)雷擊為主，側(cè)重防雷電的電磁感應(yīng)效應(yīng)。

　　2)外部的防雷技術(shù)從以前的避雷針和避雷帶轉(zhuǎn)變?yōu)楝F(xiàn)在的避雷網(wǎng)和法拉第籠;內(nèi)部的防雷技術(shù)從以前的以隔離方式為主轉(zhuǎn)變?yōu)楝F(xiàn)在的以等電位聯(lián)接方式為主。

　　3)以前檢驗接地系統(tǒng)是否合格以接地電阻值為準(zhǔn)，現(xiàn)在側(cè)重于接地結(jié)構(gòu)兼接地電阻值，特別是從獨立接地到等電位聯(lián)接方式的轉(zhuǎn)變。

　　如上所述，防雷技術(shù)和防雷概念雖然有了很大的變化，但直至現(xiàn)在，防雷的理論基礎(chǔ)仍然還是安全地引雷入地，閃電是一個電流源(更確切地說是電流波)，而不是電壓源，防雷裝置是給雷電流提供一條或幾條低阻抗的接地通道，這些基本概念仍然沒變。

CROUSE HINDS VN73 GLASS GLOBE BLUE FOR FORM 100V SERIES FIXTURE NEW IN BOX

REXROTH R911242861 INDUCTION SERVO MOTOR 2AD132D-B35LB1-AS03-A2N1 NEW CONDITION

SQUARE D 9001 D1V1W PILOT LIGHT BEZEL CLEAR (SET OF 2) NOS CONDITION IN BOX

SQUARE D 9001 D4G2S SELECTOR SWITCH 2-POSITION NEW CONDITION IN BOX

RELIANCE ELECTRIC RE041BR FACTORY REPLACEMENT BRUSH  NEW CONDITION / NO BOX

GOULD SHAWMUT NH2 gl-gL-gG FUSE 250A 690V NEW CONDITION / NO BOX

GOULD SHAWMUT NH2 gl-gL-gG FUSE 125A 690V NEW CONDITION / NO BOX

ALCO CONTROLS M340SH SOLENOID VALVE 1" NPT 230V 150 SWP 365F NOS CONDITION

YARWAY IMPULSE 3/4" STAINLESS STEAM TRAP 400 PSI 450F NEW CONDITION NO BOX

RELIANCE ELECTRIC RE44AT FACTORY REPLACEMENT BRUSH  NEW CONDITION / NO BOX

RELIANCE ELECTRIC RE41BT FACTORY REPLACEMENT BRUSH  NEW CONDITION / NO BOX

GENERAL ELECTRIC 894A505P01 ELECTROGRAPHITIC BRUSH XDT563 NEW CONDITION

STATIC CONTROLS SCC CB-0970-016 LED DISPLAY BOARD  NOS CONDITION / NO BOX

SQUARE D 9012 GGW-4 PRESSURE SWITCH PILOT LIGHT 240PSIG QUICK DISCONNECT  NNB

TRANE VAL2378 THERMAL EXPANSION VALVE  NEW CONDITION / NO BOX

ALLEN BRADLEY PHOTOSWITCH 42SRR-6006 TRANS BEAM RECIVER 20-264 VAC/DC NEW NO BOX

ASCO 27-462-1 FACTORY SOLENOID COIL 120V  NOS CONDITION IN BOX

ASCO 99-216-1D FACTORY SOLENOID COIL 110/120V  NEW CONDITION IN BOX

ASCO 302313 SOLENOID VALVE SERVICE KIT  NEW CONDITION IN BOX

ASCO 230784 SOLENOID VALVE SERVICE KIT  NEW CONDITION IN BOX

ASCO 27-478-1 FACTORY SOLENOID COIL 110/115V  NOS CONDITION IN BOX

ASCO 90-266-1 FACTORY SOLENOID COIL 115/60  NOS CONDITION IN BOX

ASCO 822385 SOLENOID VALVE SERVICE KIT 158-587 NEW SEALED CONDITION IN BOX

ASCO 302-290 SOLENOID VALVE SERVICE KIT 8211 AC NEW CONDITION IN BOX

DEVILBISS P-HC-4733 FACTORY SWIVEL CONNECTOR  NEW CONDITION IN PACKAGE

DEVILBISS P-HC-4528 FACTORY SWIVEL CONNECTOR  NEW CONDITION IN PACKAGE

DEVILBISS P-H-431 FACTORY 90 ELBOW CONNECTOR  NEW CONDITION IN PACKAGE

MILLER ELECTRIC 7101 FACTORY REPLACEMENT TOGGLE SWITCH   NEW IN PACKAGE

MILLER ELECTRIC 080283 BRUSH COVERS (SET OF 10 )   NEW IN PACKAGE

DEVILBISS KK-5046 MOUNTING BLOCK 191995  NEW CONDITION IN PACKAGE

DEVILBISS AGG-403 CONTROL VALVE 191311  NEW CONDITION IN PACKAGE

UNIDEN APX 115 RAPID CHARGER  NEW CONDITION IN BOX

ASCO 314453 SOLENOID VALVE SERVICE / REBUILD KIT NEW CONDITION IN BOX

ASCO 302-288 SOLENOID VALVE SERVICE / REBUILD KIT NEW CONDITION IN PACKAGE

CUTLER HAMMER 10250TB62 MUSHROOM BUTTON FOR PUSH-PULL OPERATOR NEW IN PACKAGE

MOTOROLA KT-32903-01 CONNECTOR KIT PS/2 TO AT/XT NEW IN PACKAGE

PEPPERL+FUCHS NBB10-30GM60-A2 10M PROXIMITY SENSOR P/N 089945 NEW IN PACKAGE

PEPPERL+FUCHS NBN4-12GM60-WS PROXIMITY SENSOR P/N 085294 NEW IN PACKAGE

PEPPERL+FUCHS NJ 8-18GM50-E2-V1 PROXIMITY SENSOR P/N 084485 NEW IN PACKAGE

PEPPERL+FUCHS NBN 8-18GM60-WS-V11 PROXIMITY SENSOR P/N 030802 NEW IN PACKAGE

POTTER & BRUMFIELD R50-E2Y1-12 RELAY 2A 28VDC / 1A 120VAC NEW IN PACKAGE

ALLEN BRADLEY 871A AK12-25 BANKING SCREW ADAPTER 25MM NEW CONDITION IN PACKAGE

NORDSON 271936 HIGH AMPERAGE THERMOSTAT KIT NEW CONDITION IN PACKAGE

DEVILBISS AGB-51-K5 FACTORY SERVICE PACKING KIT NEW CONDITION IN PACKAGE

ACOPIAN 5EB100 POWER SUPPLY MODULE AC TO DC NEW CONDITION NO BOX

MILLER MODEL 650 UNIVERSAL SAFETY HARNESS NOS CONDITION IN PACKAGE

SQUARE D 6715 TW21F TAB WELD RESISTOR 3.85 OHMS NEW CONDITION NO BOX

OPCON 8532B-6501 SOLDER IN RELAY P/N 109081 NEW CONDITION IN BOX

STRIKE FORCE 3134241 RESISTOR 12V WITH 2 FUSES NEW IN PACKAGE

PEPPERL+FUCHS NBB5-F9-E0 PROXIMITY SENSOR P/N 081838 NEW IN PACKAGE

PEPPERL+FUCHS NBB5-F9-E2 PROXIMITY SENSOR P/N 081839 NEW IN PACKAGE

PEPPERL+FUCHS NCB8-18GM50-Z4-V1 PROXIMITY SENSOR P/N 128872 NEW IN PACKAGE

WOODHEAD DN11A-M030 DEVICENET 5P CABLE ASSEMBLY 3M TRUNK CABLE NEW IN PACKAGE

WHITMAN CONTROLS P199G-10H-F12TB PRESSURE SWITCH 125VAC 45PSI NEW IN PACKAGE

SKF H313 BEARING ADAPTOR ASSEMBLY 2-3/8" SHAFT NEW CONDITION IN BOX

FESTO RWN/0-3-1/8B PNEUMATIC LIMIT VALVE 14-116 PSI NEW CONDITION NO BOX

SIMPSON 50MV PORTABLE SHUNT 150A NEW CONDITION / NO BOX

JOHNSON CONTROLS M-2500-1 SOLAR COMPENSATOR 4-1/4" SENSING NEW CONDITION IN BOX

FUJI CONTROLS BRR 25N-012S EARTH LEAKAGE RELAY 120V 200A 500MA  NEW CONDITION

3M 51119 273L IMPERIAL MICROFINISHING FILM ROLL 15 MIC 450FT X 5/8 NEW CONDITION

RO MAN ROMAN S46680X2240 TRANSFORMER 80 KVA 460V  NEW CONDITION

BANNER 17276 FIBER END ASSEMBLY  BT23S  NEW CONDITION IN BOX

BANNER 20216 FIBER END ASSEMBLY  BT12S  NEW CONDITION IN BOX

ALLEN BRADLEY 43GR-FOS20SL GLASS FIBER OPTIC CABLE NEW CONDITION IN PACKAGE

PARKER 32 CFMRCDUC 7.000 PNEUMATIC RODLESS CYLINDER 7.0 STROKE NEW NO BOX

ALLEN BRADLEY 700-FEA3TU23 TIMING RELAY .05S-10H NEW CONDITION / NO BOX 

ALLEN BRADLEY 802T-KP OILTIGHT LIMIT SWITCH BODY ONLY NEW CONDITION NO BOX

CROUSE-HINDS VXHF12GP VAPORGARD LIGHTING FIXTURE KIT NEW CONDITION IN BOX

ALLEN BRADLEY 855T-B24TL7 STEADY LED CONTROL TOWER STACK LIGHT CLEAR 24V  NIB

BALLUFF BES02K6 PROXIMITY SENSOR BESM12ML-PSC80E-S04G-W01  NEW CONDITION

AURORA MIB12 ROD END REPLACEMNT BEARING INSERT 3/4" BORE 1-1/2" OD NEW NO BOX

HONEYWELL MICRO SWITCH 1PB43 SUBMINIATURE PUSHBUTTON SWITCH NEW IN BOX

MILLER ELECTRIC 110-738 TACHOMETER CIRCUIT CARD  NOS SEALED CONDITION IN PACKAGE

BANNER IR2. 53SM2.5 FIBER OPTIC CABLE WITH PANCAKE HEAD 17879  NEW CONDITION 

NUMATICS 3FPRN12 PNEUMATIC FLOW CONTROL VALVE  NEW CONDITION IN PACKAGE

MILLER ELECTRIC 110-809 PC BOARD  NOS SEALED CONDITION IN PACKAGE

FASTENAL 73462 S/S SHCS 1/4-20 X 1 STAINLESS HEX HEAD BOLTS NEW PACKAGE OF 50

SCHAEVITZ SENSORS 100HR LINEAR VARIABLE DIFFERENTIAL TRANSDUCER  NEW CONDITION

BROOKS INSTRUMENT 1110DM32CBGAA FLOW METER 0-250 MM NEW CONDITION NO BOX

WESTINGHOUSE KD3400F CIRCUIT BREAKER 400A 600V 3 POLE NEW CONDITION / NO BOX

LITFUSE FLQ 1 TIME DELAY FUSES 1A 500VAC (SET OF 10) NEW CONDITION / NO BOX

BUSSMANN FNM-8 FUSETRON FUSES 8A 250V ( SET OF 10 ) NEW CONDITION NO BOX 

LITFUSE BLF 2 FUSES 2A 250 VAC (SET OF 6) NEW CONDITION / NO BOX

BUSSMANN FNQ-1 TRON TIME-DELAY FUSES 1A 500VAC (SET OF 6) NEW CONDITION NO BOX

UTSUNOMIYA CELLO-LITE JG1 15A FUSES 15A 600VAC TYPE NK (SET OF 3) NEW CONDITION 

UTSUNOMIYA CELLO-LITE JG1 FUSES 20A 600VAC TYPE NK (SET OF 3) NEW CONDITION 

UTSUNOMIYA CELLO-LITE JG1 FUSES 30A 600VAC TYPE NK (SET OF 3) NEW CONDITION 

SHAWMUT A4J60 AMPTRAP FUSES 60A 600VAC CLASS J (SET OF 7) NEW CONDITION NO BOX

ALLEN BRADLEY 1495-N78 ELECTRICAL INTERLOCK KIT AUXILIARY CONTACT 15A DPDT  NIB

PEPPERL+FUCHS NBB20-L3M-US-V93 PROXIMITY SENSOR P/N 909178  NEW CONDITION

BALLUFF BES Q40KFU-PAC35E-S04G-W01 PROXIMITY SENSOR 10-30V 35MM RANGE NEW IN BOX

TURCK BI2-CRS260-ADZ30X2-B3131/S34 PROXIMITY SWITCH 4275493  26MM PROBE  NIB

TURCK BI2-CRS317-AP4X2-H1141/S34 PROXIMITY SWITCH 4571690 31.7MM PROBE  NIB

TURCK BI2-CRS524-AP4X2-H1141/S34 PROXIMITY SWITCH 4580090 10-65V 2MM RANGE  NIB

ALLEN BRADLEY 855T-DL1BCBC SURFACE MOUNT CONTROL TOWER BASE & CAP NEW IN BOX

NORGREN HERION 5980118 PROPORTIONAL CONTROL VALVE PLUG-IN AMPLIFIER MODULE  NEW

ALLEN BRADLEY 1732D-IBDPM12MND DEVICENET STATION P/N 10000013378 NEW CONDITION

NEXEN 964229 EN50-15 CONVERTER 0-15 PSI NEW CONDITION / NO BOX

GENERAL ELECTRIC CR206C000AAB STARTER 27A 600V EXCELLENT USED CONDITION

ALLEN BRADLEY RC42GF221K FIXED RESISTORS 2 WATT 220 OHMS NEW PACKAGE OF 25

NUMATROL PNEUMATIC LIMIT VALVE FACTORY REPLACEMENT HEAD NEW CONDITION IN PACKAGE

NUMATICS 2FPRN12 PNEUMATIC FLOW CONTROL VALVE 1/4" X 3/8 TUBE NEW IN PACKAGE

ALLEN BRADLEY 871TM-DH2NN12-D4 INDUCTIVE PROXIMITY SENSOR 2MM  NEW IN PACKAGE

ALLEN BRADLEY 871P-BW15N40-N3 VERSACUBE PROXIMITY SENSOR 15MM  NEW IN PACKAGE

ALLEN BRADLEY PHOTOSWITCH 42GRP-9003-QD4 DIFFUSE PHOTOELECTRIC SENSOR NEW IN BOX

MARSH BELLOFRAM T-1500 COMPACT PRESSURE TRANSDUCER 966-753-100 NEW IN BOX

FAIRCHILD TFXPD 6000-005 EXPLOSION PROOF TRANSDUCER 0-10VDC NEW CONDITION NO BOX

MARTIN PARRY 5HDG SYNCHRO DIFFERENTIAL TRANSMITTER 90V NEW CONDITION

BENDIX AVIATION 5HG SYNCHRO  TRANSMITTER 115V 60 CYCLE  NEW CONDITION

VERNITRON 5HDG SYNCHRO DIFFERENTIAL TRANSMITTER 115V NEW CONDITION

BENDIX AVIATION 5HDG SYNCHRO DIFFERENTIAL TRANSMITTER  NEW CONDITION

DANAHER DYNAPAR X252048024 ENCODER 5-26VDC 5000RPM NEW CONDITION IN BOX

MOORE PRODUCTS 771-8SNF2 TRANDUCER 16 MA INPUT NOS CONDITION IN BOX

MOORE PRODUCTS 771-16SNF2 TRANDUCER 16 MA INPUT NOS CONDITION IN BOX

SIEMENS 299-03205 FLOWRITE 3-WAY 1-1/2" VALVE ACTUATOR ASSEMBLY  NEW CONDITION 

ARO INGERSOLL RAND 8040-E PNEUMATIC ELECTRODE DRESSER NEW CONDITION IN BOX

SKF 7013 CD/P4ADGA PRECISION BEARINGS (MATCHED SET) NEW SEALED CONDITION

SKF 71913 ACD/P4ADGA PRECISION BEARINGS (MATCHED SET) NEW SEALED CONDITION

SKF 7013 CD/P4ADGB PRECISION BEARINGS (MATCHED SET) NEW SEALED CONDITION

SKF 71913CD/P4ADGC PRECISION ROLLER BEARINGS (MATCHED SET) NEW SEALED CONDITION

COMPUTER CONVERSIONS HR90-11RGT ENCODER / RESOLVER HR9011RGT NEW CONDITION

FANUC A20B-1006-0300 EMERGENCY STOP BOARD NEW CONDITION / NO BOX

AMBI TECH SS-4A-30W SHORT STOP ELECTRONIC MOTOR BRAKE 30HP 460V NOS CONDITION

ALLIED ESYN AT-TS12TR TURBOSTACK ETHERNET 12 PORT HUB  NOS CONDITION

LEVITON 5500-190 RACK MOUNT TRANSIENT VOLTAGE SURGE SUPPRESSOR 15A 125VAC   NNB

BROOKS INSTRUMENT 1110CC21AGHAA FLOW METER 5.0-50.0 SCCM AIR  NEW CONDITION

LITFUSE KLK 6 FAST ACTING MIDGET FUSES 6A 600VAC NEW BOX OF 10 FUSES

BUSSMANN FNQ-1-1/2 TRON TIME-DELAY FUSES 1-1/2A 500VAC NEW BOX OF 10

BUSSMANN HVA 3/8 FAST ACTING FUSES 3/8A 1000V 3" LONG (SET OF 3) NEW NO BOX

BUSSMANN HVA 1/8 FAST ACTING FUSES 1/8A 1000V 3" LONG (SET OF 3) NEW NO BOX

FUJI FI-DST-1CN-21 OUTPUT BOARD NOS CONDITION IN BOX

VALENITE TNMG432 VN5 COATED CARBIDE INSERTS (NEW BOX OF 10)

UNICO 103-067.5.9715 SENSOR CONTROL BOARD NEW CONDITION / NO BOX

HARTMAN ALLIS CHALMERS 36-3000-004 I/O BOARD  NOS CONDITION 

R+W STEEL FLEX COUPLING ASSY. 1-3/4"  & 1-1/2"  SLEEVES NEW CONDITION / NO BOX

REXNORD NS881-25T 25MM KW SPLIT SPROCKET P/N 614-44-25 NEW CONDITION IN BOX 

PARKER PS513P PUSH-N-DRAIN PNEUMATIC DRAIN KITS (SET OF 10) NEW IN PACKAGE

MARPOSS 3194235213 FACTORY REPLACEMENT FINGER NEW CONDITION IN PACKAGE

MARPOSS 3294521203 FACTORY REPLACEMENT CONTACT NEW CONDITION IN PACKAGE

MARPOSS 3294523004 FACTORY REPLACEMENT CONTACT NEW CONDITION IN PACKAGE

MARPOSS 1044351181 FACTORY REPLACEMENT CONTACT NEW CONDITION IN PACKAGE

FAFNIR 3MM307WI CR DUL SUPER PRECISION ANGULAR CONTACT BEARING NEW CONDITION

FAG 7602030 SUPER PRECISION ANGULAR CONTACT BEARING NEW CONDITION NO BOX

BARDEN 109HDL PRECISION ANGULAR CONTACT BEARING NEW CONDITION NO BOX