名稱:兩款直流電機功率驅(qū)動芯片及其應用
隨著功率電子技術(shù)的飛速發(fā)展，直流電機的功率驅(qū)動集成電路也越來越多，它們具有效率高、輸出電流大、需要外接的元件少等特點。本文介紹 SA60以及 LMD18245這兩種芯片的引腳功能、特點及其各自的應用。關(guān)鍵詞：脈寬調(diào)制；功率輸出芯片
SA60和 LMD18245分別是美國Apex公司和NS公司推出的面向中小型直流電機的全橋功率輸出電路。它們既具有在外接少量元件的情況下實現(xiàn)電機的功率驅(qū)動、控制以及提供保護等功能的共性，又具有各自特色。下面就其引腳、功能特點及其典型應用作一個介紹。。兩芯片的主要性能參數(shù)及其特點 SA60的性能參數(shù)及應用范圍
SA60的是一個PWM型功率輸出芯片，電路提供給電機的電源電壓zui大可達到80V ,能連續(xù)向負載提供10A的電流。zui大模擬輸入電壓5V , PWM載波頻率可以到250kHz ,而效率可以高達97 %,該芯片還可以外接一個可兼容的TTL型的PWM的信號來同步四象限模式的幅值和方向。 SA60主要應用在驅(qū)動中小型直流電機，D類功率放大，軸承激勵等場合。 LMD18245的性能參數(shù)及應用范圍
LMD18245芯片可為電機提供zui大55V的電源電壓，邏輯電路電壓12V ,zui大持續(xù)電流輸出3A ,峰值電流可達6A ,zui小輸入脈沖寬度2μS ,電流傳感器zui大線性誤差±9 %。與 SA60一樣，該功率輸出級具有很高的效率。由于在芯片中集成了四位D/ A轉(zhuǎn)換器和電機電流傳感器、固定切斷時間的斬波放大器等電路，所以LMD18254很容易完成對電機電流的數(shù)字控制，實現(xiàn)步進電機的微步驅(qū)動。因此，該芯片主要用于小型直流電機特別是步進電機的控制和驅(qū)動上。引腳及其功能外形 SA60和 LMD18245的外形封裝如圖1。
內(nèi)部電路框及各引腳功能
SA60各引腳功能
 SA60的內(nèi)部結(jié)構(gòu)框如圖2所示。電路共有12個引腳，其中10、7兩腳分別是H橋和PWM及橋的驅(qū)動級電源端； 9、11為功率信號輸出端，其輸出波形與輸入信號的關(guān)系是：9腳輸出PWM信號的占空比隨輸入信號電壓的增加而增大，11腳卻反之； 1、6腳為接地端，前者是模擬接地端，后者是功率接地端；8、12端可以直接接功率地，也可以通過一個電阻接地，作為限流感用，該端的電壓zui大值為±2V ;2、4兩端分別是模擬和數(shù)字控制信號的輸入端。 LMD18245各引腳功能 LMD18245的內(nèi)部結(jié)構(gòu)框圖如圖3所示。9腳是電源端； 1、15腳功率橋的輸出端； 12、5腳分別是信號地和功率電路接地端； 4、6、7、8是D/ A轉(zhuǎn)換器的二進制數(shù)據(jù)輸入端，其中4腳為二進制數(shù)的zui高位；10腳是緊急停止控制端，高電平有效； 11腳為方向邏輯輸入端；3腳上聯(lián)接一個并聯(lián)的RC網(wǎng)絡，可將單穩(wěn)脈沖寬度設置為： 1. 1 RC秒。此外，該芯片還提供了電流傳感器放大輸出端(13腳) ,比較信號輸出端(2腳) ,和數(shù)模轉(zhuǎn)換參考電壓輸入端(14腳)。
芯片的應用實例雖然這兩個芯片都是開關(guān)式全橋功率驅(qū)動電路，由于內(nèi)部結(jié)構(gòu)的不同，工作方式也不盡相同，所以在作為電機控制電路時，電路的工作方式也各有特點。圖4是 SA60驅(qū)動直流電動機時的典型接線圖，在該圖中芯片被聯(lián)接成模擬輸入方式，在數(shù)字輸入端(2腳)與模擬地之間聯(lián)接一個電容器CT ,改變它的大小，可以調(diào)整PWM載波的頻率在22～250kHz之間變化的。
雖說LDM18245的持續(xù)電流輸出的指標還不足 SA60的三分之一，但在控制方式上有它靈活方便的一面，采用不同的聯(lián)接方式可以實現(xiàn)電機的不同的控制方式，獲得不同的控制性能，圖5是用雙極性輸出方式驅(qū)動直流電機的實例。其中固定斬波時間為1. 1 RC;電流傳感電阻R W參考公式：
計算，其中UREF是D/ A轉(zhuǎn)換電路的參考電壓，D為D/ A轉(zhuǎn)換電路的輸入電壓值， IS為電機電流的zui大設定值。與 SA60不同，在 LMD18245芯片中沒有PWM電路，想通過PWM的占空比來控制電機的轉(zhuǎn)速和轉(zhuǎn)向，需要外接控制器，聯(lián)接方法如圖中所示。應用時的注意事項在實際使用這兩種芯片時必須注意如下幾個事項。一是在電源端和功率地端必須接旁路電容，否則由于電機電流跳變或換向引起的尖峰電壓和浪涌電流會使芯片損壞。具體的做法是在芯片的電源端并聯(lián)一個1μF的高頻陶瓷電容和一個100μF的鋁電解電容，并注意聯(lián)接線要盡量的短。二是在布線時注意將模擬地和功率地嚴格分開，注意控制信號輸入線和功率信號輸出線保持距離，以免反愧干擾。小結(jié)這兩款功率輸出芯片都具有輸出電流大、工作效率高、電路設計簡便、體積小巧、性能穩(wěn)定等特點。所以它們的應用范圍遠不止上述所談到的幾種，就 SA60以及它的同系列產(chǎn)品 SA50、51芯片來說，作為D類音頻功率輸出電路已有應用，這類功率輸出裝置功率之高是傳統(tǒng)模擬音頻功率輸出級所*。

◆ 企業(yè)名稱：廈門興潤星貿(mào)易有限公司

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◆ 主營業(yè)務：DCS,PLC

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◆ 郵政編碼：361000
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WESTINGHOUSE NL-1006 USPP NL1006
WESTINGHOUSE NL-1005 USPP NL1005
WESTINGHOUSE NL-1005 REV 13 NUMA LOGIC INPUT MODULE 56923
WESTINGHOUSE NL-1005 NSFP NL1005
Westinghouse NL-1005
WESTINGHOUSE NL-1003 USPP NL1003
WESTINGHOUSE NL-1003 NSPP NL1003
WESTINGHOUSE NL-1003 NSPP NL1003
WESTINGHOUSE NL-1003 NSFP NL1003
Westinghouse NL-1003
WESTINGHOUSE NK60 NSFP NK60
WESTINGHOUSE NK60 NEUTRAL ASSY 60A 250V 600V MAX NIB
Westinghouse NK60 Neutral Assembly
Westinghouse NK-30-tb nk30-tb 30A 250V Neutral Assembly
WESTINGHOUSE NK30 USPP NK30
WESTINGHOUSE NK30 NSFP NK30
WESTINGHOUSE NK30 NEUTRAL ASSEMBLY 30 AMP 250V
Westinghouse NK30 30A 250V Neutral Assembly
Westinghouse NK30 30A 250V Neutral Assembly
WESTINGHOUSE NK200 NSFP NK200
Westinghouse NK200 Neutral Kit
WESTINGHOUSE NK100 NSFP NK100
WESTINGHOUSE NHF362 SAFETY DISCONNECT SWITCH 60A AMP 600V 50HP 60475
WESTINGHOUSE NH40 USPP NH40
WESTINGHOUSE NH30A NSFP NH30A
Westinghouse NH Control Relay NH40A 4P 120V Coil 
WESTINGHOUSE NEUTRAL KIT CATNK60 600V 60A NIB
WESTINGHOUSE NEMA STARTER 90 AMP A200M3CAC 
WESTINGHOUSE NEMA 5W201K5CF
Westinghouse Nema 3 Starters CatalogA200M3CACDM and A200M3CAC
Westinghouse NEMA 1 Cover MS1CN for MS Starter 2Lot NIB
Westinghouse ND312WK circuit breaker ND312WK Molded Case Switch 1200 amp TESTED
Westinghouse ND312T33W 1200amp Breaker 12NES1000T plug Tested per NETA Specs 
WESTINGHOUSE ND ND312TW 3 POLE 1000 AMP 600V BREAKER
WESTINGHOUSE ND ND312T33W 3 POLE 1200 AMP 600V BREAKER 1200 AMP TRIP
WESTINGHOUSE NCMZ-799 USPP NCMZ799
WESTINGHOUSE NCMZ-1799 USPP NCMZ1799
WESTINGHOUSE NCMZ-1799 NSFP NCMZ1799
Westinghouse NC31200NW circuit breaker switch TESTED-REPORT-?WARRANTY
WESTINGHOUSE NC31200F USPP NC31200F
Westinghouse NC31200F Breaker 1200 Amp 600 VAC 3 Pole
Westinghouse NC31200F Breaker 1200 Amp 600 VAC 3 Pole
Westinghouse NB-6303 Circuit Breaker 15 Amp  WOW 
WESTINGHOUSE NB3800PF NSFP NB3800PF
Westinghouse NB3800PF Circuit Breaker 600 amp plugtested with warranty
Westinghouse NB3800PF 800A AB De-Ion Tri-Pac Breaker w/400A Trip 400 Amp
Westinghouse NB3800PF 500 amp trip 3 pole circuit BREAKER 
Westinghouse NB3800PF 500 amp 3 pole SHUNT AUX BREAKER 
WESTINGHOUSE NB31200WK-S24-?2A-2B USPP NB31200WKS242A?2B
WESTINGHOUSE NB31200F USPP NB31200F
Westinghouse NB31200F circuit breaker style4997D20G02 1200 amp rating plug
Westinghouse NB31200F 1200A Breaker w/1000A Trip NB 1000 Amp
WESTINGHOUSE NB2800PF USPP NB2800PF
WESTINGHOUSE NB2800P-400 USPP NB2800P400
Westinghouse Navy  AQB-A100 Circuit Breaker 500 Volts 250AC
WESTINGHOUSE NA-51080-3 NSPP NA510803
WESTINGHOUSE N60075VD  DSH INDOOR CAPACITOR  75KVAR 600VAC 3PHASE 41508
WESTINGHOUSE N60075VD  DSH INDOOR CAPACITOR  75KVAR 600VAC 3PHASE 41508
WESTINGHOUSE N25 NSPP N25
WESTINGHOUSE N-230 USPP N230
WESTINGHOUSE MW-41 USPP MW41
Westinghouse MW-41 Overload Relay Solid State  
Westinghouse MW-41 Overload Relay Solid State  
WESTINGHOUSE MW-41 NSFP MW41
Westinghouse MW-31 Overload Relay Thermal MW31 for panel mounting without heater
Westinghouse MW-31 Overload Relay LH Mounting
WESTINGHOUSE MW-31 NSFP MW31
WESTINGHOUSE MW-31  MW OVERLOAD RIGHT HAND RELAY 60 
WESTINGHOUSE MW-31  MW OVERLOAD RIGHT HAND RELAY 60 
WESTINGHOUSE MW-31  MW OVERLOAD LEFT HAND RELAY 60 
WESTINGHOUSE MW-31  MW OVERLOAD LEFT HAND RELAY 60 
WESTINGHOUSE MW21 USPP MW21
WESTINGHOUSE MW21 NSFP MW21
WESTINGHOUSE MW-21  MW OVERLOAD RELAY 60 
WESTINGHOUSE MW-21  MW OVERLOAD RELAY 
WESTINGHOUSE MW-11 USPP MW11
Westinghouse MW-11 Thermal Overload Relay 
WESTINGHOUSE MW-11 THERMAL OVERLOAD RELAY 
Westinghouse MW-11 Overload Relay 
WESTINGHOUSE MW-11 NSFP MW11
WESTINGHOUSE MW-11  MW OVERLOAD RELAY tag383 
WESTINGHOUSE MW-11  MW OVERLOAD RELAY 60 
WESTINGHOUSE MW-1 MW OVERLOAD RELAY. S1-5. 
WESTINGHOUSE MW HEATER OVERLOAD RELAY AC.93 966467-H 
WESTINGHOUSE MV-832 USPP MV832
Westinghouse MTR-1015-13 External Current Sensor
Westinghouse MTC Transformer 50VA 460 lF0890
Westinghouse MTC Transformer 50VA 460 lF0890
Westinghouse MSTO1SN 1 pole NEMA 1 enclosure
Westinghouse MSTO1 Starter Switch 
Westinghouse MSTO1 MS STARTER 1 POLE TOGGLE OPERATED
WESTINGHOUSE MST-02 USPP MST02
WESTINGHOUSE MST01SN USPP MST01SN
WESTINGHOUSE MST01SN NSPP MST01SN
WESTINGHOUSE MST01SN NSFP MST01SN
WESTINGHOUSE MST01SN MANUAL STARTER TOGGLE 1 PoleNEMA 1 W/ Enclosure
WESTINGHOUSE MST01SL USPP MST01SL
WESTINGHOUSE MST01-230 NSPP MST01230
WESTINGHOUSE MSPT USPP MSPT
WESTINGHOUSE MSK01 NSPP MSK01
WESTINGHOUSE MSH-9.8A USPP MSH98A
WESTINGHOUSE MSH-9.7A USPP MSH97A
WESTINGHOUSE MSH-8.8A NSPP MSH88A
WESTINGHOUSE MSH-6.A NSFP MSH6A
WESTINGHOUSE MSH-6.6A USPP MSH66A
WESTINGHOUSE MSH5.A USPP MSH5A
WESTINGHOUSE MSH5.A NSFP MSH5A
WESTINGHOUSE MSH-4.5A NSFP MSH45A
WESTINGHOUSE MSH-4.1A NSFP MSH41A
WESTINGHOUSE MSH-3.7A NSFP MSH37A
Westinghouse MSH3.4A MS Starter Heater 
WESTINGHOUSE MSH-3.1A USPP MSH31A
WESTINGHOUSE MSH-3.1A NSFP MSH31A
WESTINGHOUSE MSH-2.5A NSFP MSH25A
WESTINGHOUSE MSH-2.3A USPP MSH23A
WESTINGHOUSE MSH-2.3A NSFP MSH23A
WESTINGHOUSE MSH2.3A ALSO 503561G17 MS HEATER
WESTINGHOUSE MSH-2.1A NSFP MSH21A
WESTINGHOUSE MSH-18.6A USPP MSH186A
WESTINGHOUSE MSH-17.1A USPP MSH171A
WESTINGHOUSE MSH-17.1A NSFP MSH171A
WESTINGHOUSE MSH-15.6A USPP MSH156A
WESTINGHOUSE MSH-15.6A NSFP MSH156A
WESTINGHOUSE MSH-14-2A USPP MSH142A
WESTINGHOUSE MSH-14-2A NSFP MSH142A
WESTINGHOUSE MSH-12.9A USPP MSH129A
WESTINGHOUSE MSH-10-6A NSPP MSH106A
WESTINGHOUSE MSH-1.9A NSFP MSH19A
WESTINGHOUSE MSH-1.7A NSFP MSH17A
WESTINGHOUSE MSH-1.45A NSPP MSH145A
WESTINGHOUSE MSH-1.45A NSFP MSH145A
WESTINGHOUSE MSH-1.3A NSPP MSH13A
WESTINGHOUSE MSH-1.3A NSFP MSH13A
WESTINGHOUSE MSH-1.2A NSPP MSH12A
WESTINGHOUSE MSH-1.2A NSFP MSH12A
WESTINGHOUSE MSH-0.98A USPP MSH098A
WESTINGHOUSE MSH-0.98A NSFP MSH098A
WESTINGHOUSE MSH-0.89A NSFP MSH089A
WESTINGHOUSE MSH-0.81A NSFP MSH081A
WESTINGHOUSE MSH-0.74A NSFP MSH074A
WESTINGHOUSE MSH-0.67A NSFP MSH067A
WESTINGHOUSE MSH-0.61A NSFP MSH061A
WESTINGHOUSE MSH-0.5A NSFP MSH05A
WESTINGHOUSE MSH-0.55A NSFP MSH055A
WESTINGHOUSE MSH HEATER COIL MSH9.7A 9.7A THERMAL
WESTINGHOUSE MSH HEATER COIL MSH5.5A 5.5A THERMAL
WESTINGHOUSE MSH HEATER COIL MSH4.1A 4.1A THERMAL 503C561G23
WESTINGHOUSE MSH HEATER COIL MSH2.3A 2.3A THERMAL
Westinghouse MSH 7.3 overload relay thermal unit heater element
Westinghouse MSH 3.4A thermal units heater elements 
WESTINGHOUSE MS2CN NSFP MS2CN
WESTINGHOUSE MS2BN NSFP MS2BN
WESTINGHOUSE MS STARTER MSH. 14.2A 
WESTINGHOUSE MRS3PST NSFP MRS3PST
WESTINGHOUSE MRS3PSF USPP MRS3PSF
WESTINGHOUSE MRS3BST USPP MRS3BST
WESTINGHOUSE MRC 500 MINI_REGULATIN?G CENTER
WESTINGHOUSE MRC 250 MINI_REGULATIN?G CENTER
WESTINGHOUSE MR3P120AC NSFP MR3P120AC
WESTINGHOUSE MR3B120AC USPP MR3B120AC
WESTINGHOUSE MR2P24DC NSFP MR2P24DC
WESTINGHOUSE MR2P24DC NSFP MR2P24DC
WESTINGHOUSE MR2P120AC USPP MR2P120AC
WESTINGHOUSE MR2P120AC USPP MR2P120AC
WESTINGHOUSE MR2B120AC USPP MR2B120AC
WESTINGHOUSE MR2B120AC USPP MR2B120AC
WESTINGHOUSE MR25W300DCMA USPP MR25W300DCMA
WESTINGHOUSE MPS512-DC USPP MPS512DC
WESTINGHOUSE MPS4BST NSFP MPS4BST
WESTINGHOUSE MPS4BST NSFP MPS4BST
WESTINGHOUSE MPS3BST USPP MPS3BST
WESTINGHOUSE MPS2BST USPP MPS2BST
WESTINGHOUSE MPS2BST NSPP MPS2BST
WESTINGHOUSE MPS1BST NSPP MPS1BST
WESTINGHOUSE MPS1BST NSFP MPS1BST
WESTINGHOUSE MP4B120AC NSFP MP4B120AC
WESTINGHOUSE MP3B120AC USPP MP3B120AC
WESTINGHOUSE MP2B-120ACL USPP MP2B120ACL
WESTINGHOUSE MP HEATER COIL 2C5-60 2C 560 RELAY
Westinghouse Movement Meter 76C46165H01
Westinghouse Motor Starter Heater MSH1 MSH1.1A
Westinghouse Motor Starter CatA200K2CAC
Westinghouse Motor Starter A210M4CAC_A21O?M4CAC_5250C89G?02_525OC89GO2 
WESTINGHOUSE MOTOR STARTER A201K4CB 208V COIL
Westinghouse Motor Starter A200M5CAC Sixe 5 2450 
Westinghouse Motor Starter A200M4CAC 3 PH 16005
Westinghouse Motor Starter A200M4CAC 3 PH 16005
Westinghouse Motor Starter A200M4CAC 16014
Westinghouse Motor Starter A200M3CAC 16024
Westinghouse Motor Starter A200M3CAC 16021
Westinghouse Motor Starter A200M1CAC 16032
WESTINGHOUSE MOTOR STARTER & ENCLOSURE A203R1AZA D19
Westinghouse Motor Controls 0 Mod J NOS
Westinghouse Motor Controls 0 Mod J NOS
Westinghouse Motor Controls 0 Mod J NOS
WESTINGHOUSE MOTOR CONTROL SWITCH A250M1CAC ENCLOSURE
WESTINGHOUSE MOTOR CONTROL SWITCH A200M2CAC ENCLOSURE
Westinghouse Motor Control Model J _ A210MACA-CD2 _ Mfg. Code SWSET _ 3 Phase
Westinghouse Motor Control Model J _ A210MACA-CD2 _ Mfg. Code SWSET _ 3 Phase
Westinghouse Motor Control J Mfg. Code-CRCEH _ A200MACACD2
WESTINGHOUSE MOTOR CONTROL CONTACTOR W2OOM5CFC
WESTINGHOUSE MOTOR CONTROL CONTACTOR MODELA200SABR
WESTINGHOUSE MOTOR CONTROL CONTACTOR MODELA200SABR
WESTINGHOUSE MOTOR CONTROL CATALOG5250CB4G02
WESTINGHOUSE MOTOR CONTROL AZ01K1CA NON REVERSING
WESTINGHOUSE MOTOR CONTROL AZ01K1CA NON REVERSING
WESTINGHOUSE MOTOR CONTROL AC200MICAC
Westinghouse Motor Control AC Starter 135Amp A201K4CX 120V Coil
Westinghouse Motor Control A251K0CA 18 Amps Rev Contractor
WESTINGHOUSE MOTOR CONTROL A200M3CX ENCLOSURE
Westinghouse Motor Control A200M3CAC Model J 5337 
Westinghouse Motor Control A200M3CAC 3120V A200
Westinghouse Motor Control A200M0CAC 7401A
Westinghouse Motor Contactor CatalogA201K3CA 50 HP
WESTINGHOUSE MOTOR CIRCUIT PROTECTOR MCP23480SR 
Westinghouse Motor Circuit Protector MCP13300R_MCP1?33OOR_600VAC_3 Pole
WESTINGHOUSE MOTOR CIRCUIT PROTECTOR MCP13300R
WESTINGHOUSE MOTOR CIRCUIT PROTECTOR MCP0322RC 600VAC 3 POLE 2607D80G02
Westinghouse Motor Circuit Protector HMCP050K2C EATON 
Westinghouse Motor Circuit Protector HMCP050K2C EATON 
WESTINGHOUSE Motor Circuit Protector HMCP015E0 15A HMCP
Westinghouse Motor Circuit Protector HMCP003A0C
Westinghouse Motor Circuit Protector HMCP  WOW 
Westinghouse Motor Circuit Protector HM2P400X5M01S0?9Y07  WARRANTY 
WESTINGHOUSE MOTOR CIRCUIT PROTECTOR CATMCP23480R 50A/600V/3POLE NIB
Westinghouse Motor Circuit Protector Breaker 7AMPS 3Pole HMCP007C0C 
WESTINGHOUSE MOTOR CIRCUIT PROTECTOR 50 AMP GMCP050K2C 
Westinghouse Motor Circuit Protector 30A MCP13300CR
WESTINGHOUSE MOTOR CIRCUIT PROTECTOR 15 AMP HMCP015E0C 
Westinghouse Motor Circuit Protector 15 Amp 600 Volt MCP03150R 
Westinghouse Motor Circuit Breaker 7A MCP0358R 600VAC
WESTINGHOUSE MOTOR 5 HP 2875 RPM 3 PHASE
Westinghouse Motor 40 HP AC
Westinghouse Motor 2 HP 3 Phase 208-220/440 Volts
Westinghouse motor 0 Starter A200M0CB 220 v coil 
WESTINGHOUSE MOR-OVERLOAD RELAY W/JAM AND HTM-03A MODULES. S1-2.
WESTINGHOUSE MORA2MAE NSFP MORA2MAE
WESTINGHOUSE MOR4 MOR-4 MODULAR OVERLOAD RELAY 50 
WESTINGHOUSE MOR RELAY CAT. NO. HTM-18 STYLE NO. 1D89108G18
WESTINGHOUSE MOR RELAY CAT. N0.JAM STYLE NO. 2608D22G01
WESTINGHOUSE MOR RELAY CAT. N0. HTM-08 STYLE NO. 1D89108G08
WESTINGHOUSE MOR RELAY CAT. N0. HTM06 STYLE NO. 1D89108G06
Westinghouse MOR Relay 10% Unbalanced Phase Module PUM
WESTINGHOUSE MOMENTARY PUSHBUTTON PB1E MODEL BOF 5
WESTINGHOUSE MOLDED CASE SWITCH 225AMPKA3225NW
WESTINGHOUSE MOLDED CASE SWITCH 2000 AMP SPBN  W/AUX SWITCH 
WESTINGHOUSE MOLDED CASE SWITCH 2000 AMP SPBN  
Westinghouse Molded Case Circuit Breakers FBL3030L Pair
Westinghouse Molded Case Circuit Breakers 7A MCP0358R
Westinghouse Molded Case Circuit Breakers 15A MCP03150C
Westinghouse Molded Case Circuit Breakers 15A EHB3015
Westinghouse Molded Case Circuit Breakers 100A JB2100W
Westinghouse Molded Case Circuit Breaker REH3030 30A
Westinghouse Molded Case Circuit Breaker CA3225
Westinghouse Molded Case Circuit Breaker 7A MCP0358R
Westinghouse Molded Case Circuit Breaker 70A FB3070
Westinghouse Molded Case Circuit Breaker 50A HFB2050
Westinghouse Molded Case Circuit Breaker 30A RF3030 NR
Westinghouse Molded Case Circuit Breaker 20A RF3020 NR
Westinghouse Molded Case Circuit Breaker 20A E3020 Pair
Westinghouse Molded Case Circuit Breaker 15A MCP03150CR
Westinghouse Molded Case Circuit Breaker 125A HFB3125
Westinghouse Modular Overload Relay MORAIMAE 25amp 
Westinghouse Model SBDP 5 HP 3 Phase 1735 RPMs 230/460 Volts 184T Frame
Westinghouse Model GC3100 100 AMP Breaker 
WESTINGHOUSE MOD 80 1900A81 CIRCUIT BOARD CONTROL MODULE PLC CARD 54523
WESTINGHOUSE MOD 80 1900A81 CIRCUIT BOARD CONTROL MODULE PLC CARD 54523
WESTINGHOUSE MME 2050 CONTACTOR 50 AMP. 600 VOLT
WESTINGHOUSE MME 2050 CONTACTOR 50 AMP. 600 VOLT
Westinghouse MK1 Reversing Motor Starter
Westinghouse MJ-2239 Quicklag  BA 1 Pole 20 Amp Circuit Breaker
Westinghouse MJ-1588  BA 1 Pole 15 Amp Circuit Breaker
WESTINGHOUSE MISC.OF COILS S-1470243 S-1115654 ETC.  Q4-5
Westinghouse Microampmeter CX-373 606B076A1D 0-20 MADC 
WESTINGHOUSE MG-6 MG 6 A89B359A16 AUXILIARY RELAY Q6-3
WESTINGHOUSE MG-6 MG 6 A89B359A16 AUXILIARY RELAY Q6-3
WESTINGHOUSE MG-6 MG 6 A89B359A16 AUXILIARY RELAY Q6-3
WESTINGHOUSE MG-6 MG 6 289B359A16 AUXILIARY RELAY Q6-3
WESTINGHOUSE MG-6 MG 6 289B359A16 AUXILIARY RELAY Q6-3
WESTINGHOUSE MG-6 MG 6 289B359A16 AUXILIARY RELAY Q6-3
WESTINGHOUSE MG-6 1163801 AUXILIARY RELAY Q6-5
WESTINGHOUSE MG-6 1163801 AUXILIARY RELAY Q6-5
WESTINGHOUSE MG-6 1163801 AUXILIARY RELAY Q6-5
WESTINGHOUSE METER 0-99999 HOURS STYLE 291B74A09
WESTINGHOUSE METER 0-75 AC AMP STYLE 290B899A17
WESTINGHOUSE METER 0-400 AC AMP STYLE DA5544565-X3-0?4
WESTINGHOUSE METER 0-300 AC AMP
WESTINGHOUSE MECHINICAL POLE ALARM SWITCH 240 V MARK 75
Westinghouse Mechanical Lug 600 MCM-4 
Westinghouse Mechanical Interlock M-34-3 Series A
Westinghouse Mechanical Interlock M34-1A 4925 
Westinghouse Mechanical Interlock M34-1A 4925 
Westinghouse Mechanical Interlock M-34-1 Series A
Westinghouse Mechanical Interlock M-34-1 Series A
Westinghouse Mechanical Interlock M-34-1 Series A
Westinghouse MDSA3800F 800A Seltronic Breaker w/Rating Plug 255P174H03C 800 Amp
Westinghouse MDS3800F Industrial Circuit Breaker Frame 600V 800A W/ MC800 Plug
WESTINGHOUSE MD-46U USPP MD46U
WESTINGHOUSE MD3B1NPFRG USPP MD3B1NPFRG
WESTINGHOUSE MD262 NSFP MD262
WESTINGHOUSE MD161 NSFP MD161
WESTINGHOUSE MCS4SST USPP MCS4SST
WESTINGHOUSE MCS2SST NSPP MCS2SST
WESTINGHOUSE MCS2SST NSFP MCS2SST
WESTINGHOUSE MCPO358R CIRCUIT BREAKER 7 AMP 
Westinghouse MCP53400C Motor Circuit Protector Style673B019G21 400 amp 600volt
Westinghouse MCP534000W 400A Breaker Style 673B019G06 MCP534000-W 400 Amp
Westinghouse MCP534000W 400A Breaker 600V Style 673B019G06 400 Amp MCP534000-W
Westinghouse MCP534000C 400A Breaker Style 673B019G21 MCP534000-C 400 Amp
Westinghouse MCP534000 Motor Circuit Protector 600 VAC
Westinghouse MCP534000 400A Breaker Style 673B019G15 MCP 400 Amp
WESTINGHOUSE MCP532500C 250A 600V 3P Circuit Breaker Adjustable AMP Trip Set
WESTINGHOUSE MCP532500C 250A 600V 3P Circuit Breaker Adjustable AMP Trip Set
WESTINGHOUSE MCP532500 USPP MCP532500
WESTINGHOUSE MCP-431800CR NSFP MCP431800CR
WESTINGHOUSE MCP431550RC USPP MCP431550RC
WESTINGHOUSE MCP431550RC USPP MCP431550RC
Westinghouse MCP431550RC 150 Amp 3 Pole Circuit Breaker CIR1503 
WESTINGHOUSE MCP-431550R USPP MCP431550R
WESTINGHOUSE MCP-431550R NSFP MCP431550R
Westinghouse MCP431550CR Industrial Circuit Breaker 
Westinghouse MCP431550CR 
WESTINGHOUSE MCP-431550 USPP MCP431550
Westinghouse MCP341800R Motor Circuit Protector 150 amp 228P997H09A
Westinghouse MCP331000S Breaker 100A 600V w/Aux Switch MCP331000-S 100 Amp MCP
WESTINGHOUSE MCP-331000RC USPP MCP331000RC
WESTINGHOUSE MCP-331000R USPP MCP331000R
Westinghouse MCP331000R 100A 600VAC Motor Circuit Protector Breaker
Westinghouse MCP331000R 100A 3 pole 600VAC Motor Circuit Protector
WESTINGHOUSE MCP-331000CR USPP MCP331000CR
WESTINGHOUSE MCP-331000CR NSFP MCP331000CR
Westinghouse MCP331000C Circuit Breaker 100 Amp 600V 3P
WESTINGHOUSE MCP322R CIRCUIT BREAKER O1-11
WESTINGHOUSE MCP23480S USPP MCP23480S
WESTINGHOUSE MCP-23480RC USPP MCP23480RC
WESTINGHOUSE MCP23480R USPP MCP23480R
WESTINGHOUSE MCP-23480CR CIRCUIT BREAKER N1-3
WESTINGHOUSE MCP23480CR CIRCUIT BREAKER F3 
WESTINGHOUSE MCP23480CR 
WESTINGHOUSE MCP23480C USPP MCP23480C
Westinghouse MCP23480C 50 Amp Circuit Breaker CIR1523 
Westinghouse MCP23480 motor circuit protector 50 amp Tested-Report-?Warranty
WESTINGHOUSE MCP1330RC MOTOR CIRCUIT PROTECTOR 30 AMP 600 VAC 3 POLE
WESTINGHOUSE MCP-13300RC USPP MCP13300RC
Westinghouse MCP13300RC Molded Case Circuit Breaker 30A
WESTINGHOUSE MCP-13300R USPP MCP13300R
WESTINGHOUSE MCP-13300R NSPP MCP13300R
WESTINGHOUSE MCP-13300R NSFP MCP13300R
WESTINGHOUSE MCP13300R CIRCUIT BREAKER 30 AMP 3 POLE 600VAC 
WESTINGHOUSE MCP13300CR USPP MCP13300CR
WESTINGHOUSE MCP13300CR NSPP MCP13300CR
Westinghouse MCP13300CR 30A 600 VAC CIRCUIT BREAKER
WESTINGHOUSE MCP13300C USPP MCP13300C
Westinghouse MCP13300C Molded Case Breaker 30A 600V 3P
Westinghouse MCP13300C 30 Amp Circuit Breaker CIR1519 
WESTINGHOUSE MCP13300 USPP MCP13300
WESTINGHOUSE MCP0358RC CIRCUIT BREAKER 7A 600VAC QUANTITY
WESTINGHOUSE MCP0358R USPP MCP0358R
WESTINGHOUSE MCP0358R NSFP MCP0358R
WESTINGHOUSE MCP0358R CIRCUIT BREAKER 7AMP 3POLE 600VAC W/LUGS
WESTINGHOUSE MCP-0358CR NSFP MCP0358CR
WESTINGHOUSE MCP0358CR CIRCUIT BREAKER NIB
westinghouse mcp0358cr circuit breaker 600 vac 3 pole magnetic only 7 amps
Westinghouse MCP0358CR 7AMP Adj Trip Magnetic Only 4657
Westinghouse MCP0358CR 7AMP Adj Trip Magnetic Only
WESTINGHOUSE MCP0358C USPP MCP0358C
WESTINGHOUSE MCP0358 USPP MCP0358
Westinghouse MCP0358 motor circuit protector 3 pole 7 amp HI 58 LO 18
WESTINGHOUSE MCP-0322RC USPP MCP0322RC
WESTINGHOUSE MCP-0322R USPP MCP0322R
WESTINGHOUSE MCP-0322R NSPP MCP0322R
WESTINGHOUSE MCP-0322R NSFP MCP0322R
Westinghouse MCP0322R Motor Circuit Protector Breaker
Westinghouse MCP0322R motor circuit protector 3 pole 3 amp
WESTINGHOUSE MCP0322R CIRCUIT BREAKER 3A 3P NIB
Westinghouse MCP0322R 3 amp TESTED-REPORT-?WARRANTYMCP0322R 228P999H02A
WESTINGHOUSE MCP-0322CR-2A2?B USPP MCP0322CR2A2B