3 Phase Direct On Line Starter/ Explain with Circuit Diagram, DOL Direct online starter
Different starting methods are used to start 3 phase induction motor like star delta starter, autotransformer starter, variable frequency drive,soft starter,dol starter(direct online starter) because the Induction motor draws a large current at starting.
Direct On-Line is the simplest and cheapest method used for starting three-phase motor. Dol is used for up to 5 HP motor. dol starter is more popular due to the low price.
DOL starter connects the motor directly to supply without a reduction in supply voltage and applies full line voltage to 3 phase motor. this is the main disadvantage of dol starter.
A small HP motor can be started simply by plugging into the power supply. But large HP motor required a special unit called a motor starter.
Direct online starter for 3-phase induction motor contain parts like miniature circuit breaker (MCB) for motor protection purpose, overload relay, power contactor, fuse unit, start button, stop button.
Small size dol starter is operated manually but for larger HP motor, dol motor starter are operated using electromechanical contactor (relay) to switch motor ON and OFF.
DOL Motor Starter can be used, if a high starting current cannot cause an excessive voltage drop in the motor circuit.
The demerits of dol starter is that gives the highest possible current to motor. Which is 6 to 7 time of rated current of the motor.
Besides the DOL starter draws the starting current there also exists a current peak that can rise up to 14 times the rated current since the motor is not energized from the first moment when starting.
DOL starter control circuit diagram consist components like Main power contactor, start button, stop push button and overload relay is connected in series this circuit is called control circuit of dol motor starter. All controlling of starter are controlled by this circuit.
DOL starter power circuit diagram :
Direct Online starter power diagram has fuse unit, Main power contactor (K1), overload relay. Also, we can connect MCB for protection purpose in a direct On-Line motor starter.
Пікірлер: 64
When I was working before in the textile co. I was wondering how the motor can be controlled in more than three stations,I was a machine operator and know nothing about electricity but due to my interest,I leave the job,I apply for helper job and I was lucky to work in power plant and everything go in my desire and know the job and become an electrician,even motor rewinding.thanks for the video,a guide to someone who purshue an electrical job.
@user-hr3hx7ul1d
8 ай бұрын
йўқ ъъ
@user-yq2yx7nq1q
Ай бұрын
Hi I'm still new in this industry would like to know how to read schematic diagram of the control panels
Animation class wise very super and easily to understand.....
Wow! This is video very informative and the best tutorial on the topic for me so far. I really appreciate it. Thanks for sharing it with us. Your ability to add the circuit diagram to your work makes you a top notch...
You provide a very good explanation.But a bit too fast.Please slow down the speed and movement of diagrams.Tq.
I love this, I did this last year had difficulty wiring in Lab. Am much better and would like to see more easy wiring. Definitely I will watch this video many times.
My biggest difficulty is understanding the circuit diagram, but you bringing it side by side with the wiring diagram makes sense to me.
You are making very useful vidoes, with nice explanations, thank you a lot!
Best electrical channel Iv found in a very long time. 😊
Thanks so much Eng.Gensis good information
Keep up the great work ❤
Sir, I have watched your videos is excellent and I want more Learn so please make a video for DG set deeply explain and open circuits fault also short circuits fault resolution single phase & three phase.👍
Thank You Sir Super Information
I hope this can be used for heavy duty machines too.
Make a video explaining the auxiliary contacts please, that is confusing to me and I still don't understant that concept well :(
Thank you
plz make a vedio for control a three phase motor with forward and backward with dol method
Good video bro❤
Please make video on digital Timer and connector wiring. Explain timer machanism as per connection
I love this ❤
❤️❤️❤️
Sir very nice explanation.. Can you tell me which software you use here for circuit animations?
❤ v v good
❤
Nice
For what purpose is the auxiliary contact connected?
Please how do I get an amazing app like this your own sir. You are doing a great job .
what is the recommended starter for a 10hp motor with 3 wires?
Please make a videos for wye-delta starter..thank you
Had to watch quite a few times where is the black neutral going ? I’m so confused
Please a tutorial on elementary to secondary industrial Electrical installation
I want videos on ht induction motor along with panel How circuit complete from transformer to panel to motor How many components are there in between What is working of each components.
Please let assume you wanna place an emergency stop Butto, where will it be placed
If we have 5 contactors and 5 START buttons, how they can be connected to 3 phase supply?
it's possible to connect the neutral wire to the motor instead of the grounding wire?
@multiskilledelectrician1
Жыл бұрын
Three phase motor does not need neutral but must be earthed.
I would like help with understanding the diagram drawing
Can this be connected without the overload thermal delay?
@celmusamusa1416
9 ай бұрын
Yes, it can be connected without terminal overload relay...
Please make a video bout diagram explanation 🥺🙏
what deVICE DO WE WE NEED to MAKE stronger Currr ent for two two 3 phase water pump Si
Faz em português, brasileiro
How to connect coil with plug and i start and stop the motor with switch of plug?
Wow well Explained You can't miss my Subscription 🤗
I just working as in Electricians i am struggling to understand the control wiring
Show us Forward reverse
Mine is the diagram 😭😭
Sequence of electrical comand
I thought this circuit was there to stop inrush current, but if it just turns the motor off whenever there is a high current, that means it will turn off whenever there is an inrush current, and the motor will always turn off just after it starts. I don't understand.
@IAmThe_RA
6 ай бұрын
Certain type of MCB is designed to handle in an inrush current. An overcurrent must long enough for them to trip. Cmiiw, I think Type D Mcb is the breaker that should be used in this case. Type C trips faster but Type B trips the fastest which are common in the UK homes.
Hvorfor er 95 øverst?
@nikolaimller3541
9 ай бұрын
Hva så sølv ørnen! :D
@nikolaimller3541
9 ай бұрын
god comment btw, +rep
@mikkelblomgreen1976
9 ай бұрын
Hey mr eagle Stor fan
The diagram
The video time is too short sir
reading diagram
NOT WORKING
Understanding German diagram for me, who speaks English is a difficulty
An explanation simple to understand But what about the situation when there is no neutral
Thank you
❤
❤