Contactor Starter
Question about reversing the direction of motors?
Why is mechanical interlocking used on forward and reversing starter combinations?
What type of interlocking uses a normally closed contact on the starter to lock out the other starter?
Why are indicator lights often used with forward and reversing circuits?
Are ‘normally open’ or ‘normally closed’ contacts used when a limit switch is used to stop a motor that is running in one direction?
When reversing the direction of a three phase motor, are the leads interchanged on the LINE side of the contactors or on the LOAD side of the contactors?
Mechanical interlocking is used to prevent “electrical over ride” of reversing starters to prevent someone from physically pushing reversing coil in.
Normally closed contact being used as “anti-reversing” lock out is “Electrical Interlocking” as opposed to Mechanical Interlocking.
Indicator lights are used to give a heads up as to which direction motor IS turning. Sometimes used in conjunction with a “Motor Not Turning” Light.
Choice of Normally Open (NO) or Normally Closed (NC) on a limit switch USUALLY depends on whether or not you want a “Fail Safe” condition. If you use the NC contacts on the Limit Switch to stop the motor, if the circuit opens FOR ANY REASON, then the motor stops. This is Fail Safe circuit. If you use the NO contacts and the circuit fails, the motor would continue to run because the circuit would ALWAYS be open. This would NOT be Fail Safe, but still acceptable if you do not need Fail Safe.
The switching of the leads for the three Phase motor should be done on the LOAD side of the contacter.
Solid State Motor Starter with e-stop, forward, reverse and overload protection. – Phoenix Contact
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Magnetic Contactor Starter $100.00 |
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NIP JOSLYN CLARK 5M-063 AUXILIARY CONTACTOR STARTER $32.00 |
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Telemecanique/SquareD Motor Contactor/Starter 25amp15HP $125.00 |
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GENERAL ELECTRIC 120A CONTACTOR MOTOR STARTER GE NEW $349.99 |
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Sprecher + Schuh CA3-9 ,contactor, starter, relay $30.00 |
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Cutler Hammer 9-1510-2 Motor Starter Coil / Contactor C $275.00 |
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Cutler Hammer 9-1514-2 Motor Starter Coil / Contactor C $125.00 |
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Cutler Hammer 9-1549-1 Motor Starter Coil / Contactor C $250.00 |
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Cutler Hammer 9-1583-1 Motor Starter Coil / Contactor C $300.00 |
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Cutler Hammer 9-1585-1 Motor Starter Coil / Contactor C $350.00 |
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Cutler Hammer 9-1589-1 Motor Starter Coil / Contactor C $425.00 |
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Cutler Hammer 9-1606-16 Motor Starter Coil / Contactor $75.00 |
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Siemens 3TF4422-0AQ0 Contactor Starter 3TF4422 Motor $49.99 |
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GENERAL ELECTRIC STARTER CONTACTOR COIL 22D11G95A NEW $40.00 |
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ALLEN BRADLEY CONTACTOR STARTER 100-A09ND3 193-A1C1 AB $10.00 |
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Cutler Hammer 9-1630-7 Motor Starter Coil / Contactor C $75.00 |
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Cutler Hammer 9-1688-1 Motor Starter Coil / Contactor C $100.00 |
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Cutler Hammer 9-1808-8 Motor Starter Coil / Contactor C $75.00 |
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Cutler Hammer 9-1811-45 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-1886-1 Motor Starter Coil / Contactor $75.00 |
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Cutler-Hammer Contactor/Motor Starter E101C40H3A 3 Pole $39.95 |
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Cutler Hammer 9-1891-2 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-1945-1 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-1945-2 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-1989-1 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-1989-2 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-2024-2 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-2183-1 Motor Starter Coil / Contactor $50.00 |
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Cutler Hammer 9-2404-2 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-2404-4 Motor Starter Coil / Contactor $75.00 |
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Cutler Hammer 9-2739-3 Motor Starter Coil / Contactor C $250.00 |
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Cutler Hammer 9-4553-1 Motor Starter Coil / Contactor C $250.00 |
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Cutler Hammer 9-872-18 Motor Starter Coil / Contactor C $2,500.00 |
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Cutler Hammer 9-875-7 Motor Starter Coil / Contactor C $4,000.00 |
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Cutler Hammer 9-871-7 Motor Starter Coil / Contactor C $3,000.00 |
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ALLEN BRADLEY 500-BOD930 SIZE 3 STARTER CONTACTOR NICE $74.99 |
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General Electric 3020204 Motor Starter Coil/ Contactor $300.00 |
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General Electric 3241938 Motor Starter Coil/ Contactor $300.00 |
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Lot of 2 M625 M 625 Stotz Starter Contactor VDE 0660 $25.00 |
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General Electric 3241953 Motor Starter Coil/ Contactor $300.00 |
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Square D starter Contactor 8910 DPA53 DPA53V02 heater $60.00 |
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RC 36381 Starter Contactor Coil 440VAC 60 Hz Ref $32.99 |
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20 HP Contactor starter 24 VAC. $12.00 |
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Square D Covers for Magnetic Contactors Starters 31063 $19.99 |
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Square D Nema Size 1 Contactor Motor Starter 8736SC $33.99 |
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ALLEN BRADLEY MOTOR STARTER MAGNETIC CONTACTOR CONTROL $60.00 |
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LOT 11 GE FURNAS A-B CIRCUIT BREAKER CONTACTOR STARTER $199.00 |
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Furnas Electric 41NB30AJP 30A 3-Pole Contactor Starter $29.99 |
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GE 15D21G2 Contactor Starter COIL 115 VOLT 60 Hz $14.58 |
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NEW NIB PUSHBUTTON STATION CONTROL CONTACTOR STARTER $19.99 |
