EHD3020

EHD3020

EHD3020

EHD3020

WESTINGHOUSE LA3300  CIRCUIT BREAKERCLEANED TESTED

Westinghouse LA3250  LA3600F w/ 250 Amp Trip Circuit Breaker Surplus

WESTINGHOUSE LA322 CIRCUIT BREAKERCLEANEDTESTED

WESTINGHOUSE LA317 CIRCUIT BREAKERCLEANEDTESTED

WESTINGHOUSE LA2600F USPP LA2600F

WESTINGHOUSE LA2600 USPP LA2600

WESTINGHOUSE LA2400F USPP LA2400F

WESTINGHOUSE LA LA3400PRF 3 POLE 400 AMP TRIP BREAKER la3400 NO COVER

WESTINGHOUSE LA LA3400PRF 3 POLE 400 AMP TRIP BREAKER la3400

WESTINGHOUSE LA LA3400PRF 3 POLE 300 AMP TRIP BREAKER

WESTINGHOUSE LA LA3400PRF 3 POLE 250 AMP TRIP BREAKER

WESTINGHOUSE LA LA3400PRF 3 POLE 225 AMP TRIP BREAKER

WESTINGHOUSE LA LA3400PRF 3 POLE 175 AMP TRIP BREAKER

WESTINGHOUSE LA LA3400PRF 3 POLE 175 AMP TRIP BREAKER

WESTINGHOUSE LA LA3400PF 3 POLE 400 AMP TRIP BREAKER

WESTINGHOUSE LA LA3400PF 3 POLE 125 AMP TRIP BREAKER

WESTINGHOUSE LA LA3400F 3 POLE 250 AMP TRIP BREAKER

Westinghouse LA Frame 3 Pole 600-500 Amp 600VAC LA3600F

WESTINGHOUSE LA 2 pole 600 amp LA2600S LA2600 Circuit Breaker MISSING LUG COVER

WESTINGHOUSE L-60 USPP L60

WESTINGHOUSE L-60 NSFP L60

Westinghouse L-60 Electrical Interlock 557D  

Westinghouse L-60 Electrical Interlock 557D  

WESTINGHOUSE L-56E NSFP L56E

WESTINGHOUSE L-56D USPP L56D

WESTINGHOUSE L-56D NSPP L56D

WESTINGHOUSE L-56D NSFP L56D

WESTINGHOUSE L-56C USPP L56C

WESTINGHOUSE L-56C NSFP L56C

WESTINGHOUSE L56C 2 NC POLES. T3-6. 

WESTINGHOUSE L-56B USPP L56B

WESTINGHOUSE L-56B NSPP L56B

WESTINGHOUSE L-56B NSFP L56B

WESTINGHOUSE L-56B AUXILIARY CONTACT N1-3

Westinghouse L-56 electrical interlock S NO 2609D01G01

Westinghouse L-56 Electircal Interlock Universal Poles 1 NC NIB

WESTINGHOUSE L55 USPP L55

WESTINGHOUSE L55 NSFP L55

WESTINGHOUSE L-55 MOTOR STARTER INTERLOCK 

WESTINGHOUSE L-54 MOTOR STARTER INTERLOCK 

WESTINGHOUSE L53-4-5 USPP L5345

WESTINGHOUSE L53-4-5 NSPP L5345

WESTINGHOUSE L53-4-5 NSFP L5345

WESTINGHOUSE L53 NSFP L53

WESTINGHOUSE L-52 USPP L52

WESTINGHOUSE L-51 USPP L51

WESTINGHOUSE L-405544-J USPP L405544J

Westinghouse L2046NV LCD MONITOR CAPACITOR KITALL SUNCON

Westinghouse L1975NW LCD MONITOR CAPACITOR KITALL SUNCON

Westinghouse L1975N LCD MONITOR CAPACITOR KITALL SUNCON

Westinghouse L/A202K4CAM Latched Lighting Contactor STR1600 

Westinghouse L Frame 600 amp Trip 400 Shunt Trip 

Westinghouse L Frame 600 amp circuit breaker 400 amp Trip CHIPPED

Westinghouse L Frame 150 amp Trip 400 breaker

WESTINGHOUSE KX251 USPP KX251

Westinghouse KX-241Style 2140A14H64

WESTINGHOUSE KX-241/0-1500 USPP KX24101500

WESTINGHOUSE KX-241 USPP KX241

WESTINGHOUSE KX-241 100 PSI 

WESTINGHOUSE KVA 1F0990 TRANSFORMER 

WESTINGHOUSE KT-5 CURRENT TRANSFORMER 4005 A AMPS 5KV INSULATION 46023

WESTINGHOUSE KT3400T 400A 3P -1 YEAR RETURN POLICY- NIB

Westinghouse KT3300T Thermal Magnetic Trip Unit 300 Amps

Westinghouse KT-3175-T USPP KT3175T THERMAL MAGNETIC CIRCUIT BREAKER 

WESTINGHOUSE KT3175T NSFP KT3175T

WESTINGHOUSE KT3150T USPP KT3150T

WESTINGHOUSE KT2400T 400A 2P -1 YR RETURN POLICY- NIB

WESTINGHOUSE KT2400T 400A 2P -1 YR RETURN POLICY- NIB

WESTINGHOUSE KT-15 CURRENT TRANSFORMER 2005A AMP 15KV 101 RATIO 45608

WESTINGHOUSE KS-269 USPP KS269

WESTINGHOUSE KL-949-20 USPP KL94920

WESTINGHOUSE KL3100 USPP KL3100

WESTINGHOUSE KIN-60 CURRENT TRANSFORMER 5/200 7524A68G10 WESTINGHOUSE E10

WESTINGHOUSE KIN-60 CURRENT TRANSFORMER 5/200 7524A68G10 WESTINGHOUSE E10

WESTINGHOUSE KIN-60 CURRENT TRANSFORMER 5/200 7524A68G10 WESTINGHOUSE E10

Westinghouse K-Frame 225A AB DE-ION Breaker 3 Pole 225 Amp 1773619 KL36225

WESTINGHOUSE KES2002 USPP KES2002

WESTINGHOUSE KE724501 USPP KE724501

WESTINGHOUSE KDB3400W USPP KDB3400W

Westinghouse KDB3400W Industrial Circuit Breaker 600V 400A 3P with KT3400T

Westinghouse KDB3300W Circuit Breaker 300 amp 600V Aux switch A1X3PK Guaranteed

Westinghouse KDB3250 Series C Circuit Breaker 250 AMP 600 VAC KDB 35 K

Westinghouse KDB3250 Series C Circuit Breaker 250 AMP 600 VAC KDB 35 K

Westinghouse KDB3250 Series C Circuit Breaker 250 AMP 600 VAC KDB 35 K

Westinghouse KDB KDB3400w 400 amp 3 pole Circuit Breaker RED

Westinghouse KDB KDB3350w 350 amp 3 pole Breaker

Westinghouse KDB KDB3350w 350 amp 3 pole Breaker

WESTINGHOUSE KD-3400-KW USPP KD3400KW

Westinghouse KD3400KW Series C 400 Amp.5892 

WESTINGHOUSE KD-3400-KW NSFP KD3400KW

WESTINGHOUSE KD3400FS 400 AMP 3 POLE CIRCUIT BREAKER

WESTINGHOUSE KD3400F USPP KD3400F

Westinghouse KD3400F KD3400 400A /w 150A Trip Breaker

Westinghouse KD3400F Industrial Circuit Breaker 600V 400A 3P with KT3350T

Westinghouse KD3400F Industrial Circuit Breaker 400A 2P

Westinghouse KD3400F Circuit Breaker With Disconnect Handle 400 Amp

WESTINGHOUSE KD3400F CIRCUIT BREAKER 4000A 600VAC

Westinghouse KD3400F Circuit Breaker 400 amp trip Nice pullout Guaranteed

Westinghouse KD3400F 480VAC 400A Circuit Breaker

Westinghouse KD3400F 400A Circuit Breaker with Lugs

WESTINGHOUSE KD3400F 3 POLE CIRCUIT BREAKER 400 AMP

Westinghouse KD2400F SER C

Westinghouse KD2400F SER C

WESTINGHOUSE KD2400F INDUSTRIAL CIRCUIT BREAKER 

WESTINGHOUSE KD2400F INDUSTRIAL CIRCUIT BREAKER 

WESTINGHOUSE KD2400F CIRCUIT BREAKER 400 AMP 600VAC

WESTINGHOUSE KD2225 225 AMP 2 POLE CIRCUIT BREAKER

WESTINGHOUSE KD KD3400F 3 POLE 250 AMP TRIP CIRCUIT BREAKER 3250F CUTLER HAMMER

WESTINGHOUSE KD 43K KD3400F 400 AMP 600VAC 3 POLE

WESTINGHOUSE KC13358IT3 NSFP KC13358IT3

4、 变频器运行时对PLC干扰应注意的问题

变频器运行时会对周围电气设备（包括P L C ）产生较强的电磁干扰，同时变频器主电路断路器等开关器件动作时也会影响PLC 的正常工作。为防止变频器运行时对PLC干扰，变频器与P L C 相连接时应该注意以下几点：

（1）对PLC 本身应按规定的接线标准和接地条件进行接地，而且应注意避免和变频器使用共同的接地线，且在接地时使二者尽可能分开。

（2）当电源电压波动大，谐波成分多时，为抑制谐波干扰，应在PLC 的电源模块及输入/ 输出模块的电源线上接入噪音滤波器或者隔离变压器。如果干扰仍严重，应考虑在变频器主回路中接入电抗器、变压器和噪音滤波器等措施。

（3）变频器和P L C 安装在同一电控柜时，应尽可能使与变频器有关的电缆和与PLC 有关的电缆分开安装，尤其是连接变频器的强电电缆与连接PLC 的弱电电缆更要分开安装。

4 结束语

变频器和P L C 间连接问题，涉及到数字量信号连接、模拟量信号连接以及避免干扰应注意的问题；在实际应用中，两者间的连接还涉及到用弱电信号控制强电的问题。因此，应引起重视，避免干扰造成变频器、PLC 的误动作；避免连接不当造成PLC 或变频器的损坏。

如果购买单位的在质保日期一年内发现有质量缺陷的，可以进行一个免费维修或更换。

SIEMENS 6SE6-440-2AD31-1CA1 USPP 6SE64402AD311CA1

SIEMENS 6SE9-211-5CA40 USPP 6SE92115CA40

SIEMENS 6SN1118-1NH00-0AA2 USPP 6SN11181NH000AA2

SIEMENS 7ML5431-0BC20-0DA1 NSPP 7ML54310BC200DA1

SIEMENS A1-16-100-504-ISS9 NSPP A116100504ISS9

SIEMENS MTA USPP MTA

SIEMENS S0NES004 USPP S0NES004

SIEMENS SED2-1.5/32X NSFP SED21532X

SOUTHCON IND CONTROLS PWM USPP PWM

SPANG E65261214 USPP E65261214

SPANG FC7G5-A-2600A10 USPP FC7G5A2600A10

SQUARE D 5S40F USPP 5S40F

SQUARE D 8539-SCG-41V02S NSFP 8539SCG41V02S

SQUARE D 8539-SCG42S8-V02S USPP 8539SCG42S8V02S

SQUARE D GFM100FA NSFP GFM100FA

SQUARE D GFM250 NSFP GFM250

SQUARE D H363NDS USPP H363NDS

SQUARE D HLL36125 USPP HLL36125

SQUARE D IF36070 NSFP IF36070

SQUARE D KC-34125 NSPP KC34125

SQUARE D KHL36000M1380 USPP KHL36000M1380

SQUARE D LA-36400 NSFP LA36400

SST 5136-SD-ISA NSFP 5136SDISA

STI 70158-1148 NSFP 701581148

STI MC47-20-1125-R USPP MC47201125R

STI MS4348BR USPP MS4348BR

SYMAX 8020-SCP-401 NSPP 8020SCP401

SYMBOL TECHNOLOGIES PDT-8146 NSFP PDT8146

TB WOODS WFC2010-0C USPP WFC20100C

TB WOODS WFC4002-0CHT USPP WFC40020CHT

TECHNIQUIP 8SG-CM USPP 8SGCM

TELEMECANIQUE TSX-AEY-1614 USPP TSXAEY1614

TELEMECANIQUE TSX-P474-11 USPP TSXP47411

TELEMECANIQUE TSX-RAM-32-8 USPP TSXRAM328

TEXAS INSTRUMENTS PLC 500-5022 NSFP 5005022

TEXAS INSTRUMENTS PLC 500-5052 USPP 5005052

TEXAS INSTRUMENTS PLC 505-7012A NSPP 5057012A

TEXAS INSTRUMENTS PLC 560-2136 USPP 5602136

TEXAS INSTRUMENTS PLC PM550-302 USPP PM550302

TEXTRON C062050-BANRB-R NSPP C062050BANRBR

TEXTRON C062050-BANRC NSPP C062050BANRC

THOMAS & BETTS LBD10900-G USPP LBD10900G

THOMSON INDUSTRIES DT115-050-0-RM115-80 USPP DT1150500RM11580

TOSHIBA VFS9-4150PL-WN USPP VFS94150PLWN

TOTAL CONTROL PRODUCTS QPI-2D100-L2P-F USPP QPI2D100L2PF

UNIPRO C-23.050052X-01883 NSFP C23050052X01883

UNIPRO C-23.050052X-02248 NSFP C23050052X02248

VICKERS DG4S4-013C-H-50 USPP DG4S4013CH50

WARD LEONARD 5DP3-20100 USPP 5DP320100

WEBER SCREWDRIVING WSG-90 USPP WSG90

WESTINGHOUSE 1640A19G02 USPP 1640A19G02

WESTINGHOUSE 277A454G01 NSFP 277A454G01

WESTINGHOUSE A206D3MABZ5 NSPP A206D3MABZ5

WESTINGHOUSE A224S0AAX-Z7U NSFP A224SOAAXZ7U

WESTINGHOUSE LA3400FS NSFP LA3400FS

WINSMITH 263MWTS4200GEK USPP 263MWTS4200GEK

XYCOM 143635 USPP 143635

XYCOM 9460-513316-STN-T-F-A NSPP 9460513316STNTFA

YAMATAKE 30733155-501 NSFP 30733155501

YASKAWA ELECTRIC CACR-SR02AB2ER NSFP CACRSR02AB2ER

YASKAWA ELECTRIC CACR-SR03AAA2AH USPP CACRSR03AAA2AH

YASKAWA ELECTRIC CIMR-G3A45P5 NSPP CIMRG3A45P5

YASKAWA ELECTRIC CIMR-G5M27P5 USPP CIMRG5M27P5

YASKAWA ELECTRIC CMPC-CM34C-3 USPP CMPCCM34C3

YASKAWA ELECTRIC DDSCR-GL20 USPP DDSCRGL20

YASKAWA ELECTRIC JAMSC-C8110 USPP JAMSCC8110

YASKAWA ELECTRIC JANCD-SP17B NSFP JANCDSP17B

YASKAWA ELECTRIC JANCD-SV03B NSFP JANCDSV03B

YASKAWA ELECTRIC SGDH-30AE USPP SGDH30AE

YASKAWA ELECTRIC SGMSH-30D2A61 USPP SGMSH30D2A61

YOKOGAWA YMA11-A1AA NSPP YMA11A1AA