If i understood it correctly, the thermal withstand curve (running) is for safe stall time/ stall time, and locked rotor withstand curve is for lrc cold and hot right ?
Where to set the Motor thermal relay curve? Motor protection relay curve between Hot and cold withstand or below both?. I've read some papers which indicate to set the the protection between the hot & cold curves, but in the same paper indicate if only the hot curve is given, then set below. Should I use both element 51 and element 49 for the same motor?
Thank you so much for the video. It is very useful for me to get a clear idea of characteristics of the motor thanks to your simple and brief explanation . For which I was searching for a long period of time.Please Upload the motor protection calculation you have told in the video.
thank you so much sir ..........induction motor operate in normal condition by fixed rotation and when a load is increasing the motor changes value of rotation how to explain that
Thank you so much sir. you are great. Really first time , I got clearly understand the motor's characteristics. kindly also upload the video of motor protection setting calculation.
So many years it was difficult for me to read the chareceristics of motor , thogh dealing with big motors in cement industry ..now my understanding improved .
Hello I would really appreciate it if you could help me resolve this issue. I have a 1000 rpm 160 kw rated 3 phase Delta connected ac motor hooked to an air compressor feeding an oxygen production plant. our phase to phase supply voltage is 380 volts. our maximum running load current at working pressure is 250 Amps. This motor failed as it was running for more than 10 years. Lately we demanded more continuous load due to high demand for medical oxygen effected by covid19 pandemic. I could not find a similar replacement available. However i found another German made motor with same mounting frame and shaft size and also 1000rpm at 50 Hz the name plate says: Delta connection 660 Volts - 260 Amps - 240 KW. my question is : if i supplied this motor 380V with same delta connection will it be able to give me 160 kw power? because its limiting design current is 260 Amps as it says . Thus if am assuming its rated power will be reduced proportionally to the reduction of supply voltage. i it is rated 240 Kw at 660 Volts is it true that it will become a 160 Kw motor under 380 Volts? I am also assuming it will not overheat as the current will not exceed its rated 260 A at my demanded compressor load. Please help me if you have a definitive answer without any speculations. Best regards
Honestly i am not very sure. Since the motor is a compressor motor so your understanding seems to be correct. But i would suggest that instead of connecting it directly you put a dry try transformer which will rise the voltage. Because connecting the motor directly will risk a huge amount of money.
Thank you so much for this video. I really needed understanding of the same.
Sir pls clear hot run and cold start of motor .
Very Good!
If i understood it correctly, the thermal withstand curve (running) is for safe stall time/ stall time, and locked rotor withstand curve is for lrc cold and hot right ?
please sir update the relay setting calculation for motor as you said you will soon upload a video for it.I am waiting sir.Please
okay. give me some time please...
@@electricaltechnologyandind5335sir sorry to disturb u again, sir please update relay setting calculation for motor protection. Please dont mind.
Hello sir please update the motor relay setting calculation as you said you will soon upload a video for it.
Thermal withstand curve also reflects stator core body current withstand capacity during earth fault ?
Really well explained concept, I can't seem to remember if any one have done better than this
If I look at this curve, where do I get the motor acceleration data?
Where to set the Motor thermal relay curve? Motor protection relay curve between Hot and cold withstand or below both?. I've read some papers which indicate to set the the protection between the hot & cold curves, but in the same paper indicate if only the hot curve is given, then set below.
Should I use both element 51 and element 49 for the same motor?
Obviously to set belo hot curve.
Thank you so much for the video. It is very useful for me to get a clear idea of characteristics of the motor thanks to your simple and brief explanation . For which I was searching for a long period of time.Please Upload the motor protection calculation you have told in the video.
This is renga working in L&T ur videos are very useful ... keep posting ....
very clear good job, think you for your efforts
Very good. Thanks 🙏🙏🙏🙏
Thanks a lot sir please do you have explaining your video in our website .....I am very very interested
I want your explaining of this video in your website
It is very much usefull
Please send the hindi
Thanks 🙏
thank you so much sir ..........induction motor operate in normal condition by fixed rotation and when a load is increasing the motor changes value of rotation how to explain that
Thank you so much sir. you are great. Really first time , I got clearly understand the motor's characteristics. kindly also upload the video of motor protection setting calculation.
Thanks for such helpful vedio...👍👍
So many years it was difficult for me to read the chareceristics of motor , thogh dealing with big motors in cement industry ..now my understanding improved .
Excellent elaboration. Also make video on Generator capability curve. Thanks
Thanks for really a great technical video..
Please post video to explain differnt characteristics of protection relays
For unbalance or single phasing protection in motor is there any standard setting. And how to calculate that one ?
when you understand it you can explain it ..thank you very much🙏
Plz upload vedio,with fault current calculation for motor protection
I want your explaining of this video in your website please
sir please make a video for selecting setting for relay for motor protection.
Hello I would really appreciate it if you could help me resolve this issue. I have a 1000 rpm 160 kw rated 3 phase Delta connected ac motor hooked to an air compressor feeding an oxygen production plant. our phase to phase supply voltage is 380 volts. our maximum running load current at working pressure is 250 Amps. This motor failed as it was running for more than 10 years. Lately we demanded more continuous load due to high demand for medical oxygen effected by covid19 pandemic. I could not find a similar replacement available. However i found another German made motor with same mounting frame and shaft size and also 1000rpm at 50 Hz the name plate says: Delta connection 660 Volts - 260 Amps - 240 KW. my question is : if i supplied this motor 380V with same delta connection will it be able to give me 160 kw power? because its limiting design current is 260 Amps as it says . Thus if am assuming its rated power will be reduced proportionally to the reduction of supply voltage. i it is rated 240 Kw at 660 Volts is it true that it will become a 160 Kw motor under 380 Volts? I am also assuming it will not overheat as the current will not exceed its rated 260 A at my demanded compressor load. Please help me if you have a definitive answer without any speculations. Best regards
Honestly i am not very sure. Since the motor is a compressor motor so your understanding seems to be correct. But i would suggest that instead of connecting it directly you put a dry try transformer which will rise the voltage.
Because connecting the motor directly will risk a huge amount of money.
@@electricaltechnologyandind5335 thank you for your feedback.
Thanks for sharing ur knowledge with us sir !
Thanks sir...clear for me now
Wonderful. Keep it up.
Nice vedio,very useful
Should I use both element 51 and element 49 for the same motor?
49 and 50. Not 51
No dislikes at all
Great man
Super....,
Sir waiting for relay setting calculations
It will take some time. Please wait... extremely sorry for the delay
please sir i am waiting your reply
i couldn't understand what you are asking for
Please upload a video for motor setting calculation sir as you said you will upload a video for it.
give me some time bro.... i work for a company. so it takes time to make videos. please give me some time...
Sure sir.take your time.thanks
Sir yet i am waiting for the video for motor setting calculation.
I have been very busy for last two months, and not able to record any new video. I am only uploading previously recorded videos
Okay sir its a requesr please share it soon. will be waiting for it.
the best explanation, ur the saviour of electrical engineers