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💎Mary_youma💎
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Wednesday 04 August 2021 13:59:31 GMT
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This image explains three common 3-phase motor starters used in industrial electrical systems. 1. DOL Starter (Direct-On-Line) Components MC = Magnetic Contactor OLR = Overload Relay ON = Start Push Button (NO) OFF = Stop Push Button (NC) M = 3-Phase Motor Working Press ON button. MC coil energizes. Contactor contacts close and supply goes directly to the motor. MC auxiliary NO contact provides holding/latching. Press OFF or if OLR trips, motor stops. Use Small motors. Simple and low-cost starter. Motor gets full voltage instantly. 2. Forward-Reverse Starter Components F.MC = Forward Contactor R.MC = Reverse Contactor NC Contacts = Electrical Interlocking Working Press ON.F → Forward contactor energizes → Motor rotates forward. Press ON.R → Reverse contactor energizes → Two phases interchange → Motor rotates reverse. NC interlocking prevents both contactors from turning ON together. Use Hoists Conveyors Drilling machines Applications requiring direction change 3. Star-Delta Starter Components M.MC = Main Contactor Y.MC = Star Contactor Δ.MC = Delta Contactor Timer = Changes Star to Delta after a delay Working Press START. Main and Star contactors energize. Motor starts in Star connection (lower starting current). Timer counts. Timer switches OFF Star contactor and switches ON Delta contactor. Motor runs in Delta connection at full voltage. Use Large motors. Reduces starting current. Common in pumps, compressors, and industrial machinery. Quick Comparison Starter Starting Current Cost Motor Size DOL High Low Small Forward-Reverse High Medium Small/Medium Star-Delta Low Higher Medium/Large Main idea: DOL = Direct start. Forward-Reverse = Change motor direction. Star-Delta = Reduce starting current for larger motors. #ElectronicsExplained #ElectronicsEducation #foryou #CircuitDesign #basicelectronics
This image explains three common 3-phase motor starters used in industrial electrical systems. 1. DOL Starter (Direct-On-Line) Components MC = Magnetic Contactor OLR = Overload Relay ON = Start Push Button (NO) OFF = Stop Push Button (NC) M = 3-Phase Motor Working Press ON button. MC coil energizes. Contactor contacts close and supply goes directly to the motor. MC auxiliary NO contact provides holding/latching. Press OFF or if OLR trips, motor stops. Use Small motors. Simple and low-cost starter. Motor gets full voltage instantly. 2. Forward-Reverse Starter Components F.MC = Forward Contactor R.MC = Reverse Contactor NC Contacts = Electrical Interlocking Working Press ON.F → Forward contactor energizes → Motor rotates forward. Press ON.R → Reverse contactor energizes → Two phases interchange → Motor rotates reverse. NC interlocking prevents both contactors from turning ON together. Use Hoists Conveyors Drilling machines Applications requiring direction change 3. Star-Delta Starter Components M.MC = Main Contactor Y.MC = Star Contactor Δ.MC = Delta Contactor Timer = Changes Star to Delta after a delay Working Press START. Main and Star contactors energize. Motor starts in Star connection (lower starting current). Timer counts. Timer switches OFF Star contactor and switches ON Delta contactor. Motor runs in Delta connection at full voltage. Use Large motors. Reduces starting current. Common in pumps, compressors, and industrial machinery. Quick Comparison Starter Starting Current Cost Motor Size DOL High Low Small Forward-Reverse High Medium Small/Medium Star-Delta Low Higher Medium/Large Main idea: DOL = Direct start. Forward-Reverse = Change motor direction. Star-Delta = Reduce starting current for larger motors. #ElectronicsExplained #ElectronicsEducation #foryou #CircuitDesign #basicelectronics
Sự nổi dậy của nghỉ hè #yendihoc #sinhvien #xh #viral
Sự nổi dậy của nghỉ hè #yendihoc #sinhvien #xh #viral




ben boyle keşfet banınıskm #keşfet #millitakım #hamamböceği #yapayzeka
ben boyle keşfet banınıskm #keşfet #millitakım #hamamböceği #yapayzeka


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