Magaling, bro💪.I told my cadet to subscribe to you.I also have experience, but the video from the blog with the non-working expansion valve helped me a lot.
Nice and good job sir leckyjake. Another additional knowledge about on how the proper elec. Motor winding, VFD and MCB testing/checking...Salamat sa video sir ETO leckyjake....Have a safe and smooth sailing sir.....GOD BLESS YOU 🙏
Thanks brilliant video 👍 Personal experience of using VFD in our workshop (240 v 1 phase to 380v 3 phase VFD) Most nights 2300-0300 is perfect faultlessly performance but anytime between 1100-1345 is totally useless 🤔 = Incoming 240v 10kva line transformer falls away @ 1100-1345 to much demand on area network 😬🤔🤦
So an other idea would be to go and torque check all the VFDs and Motors , because IF one failed the rest are also in line to fail in similar ways. SO I would suggest take one by one out of commission and re-tighten all the bolts and connections and check for lose connections.
Hi Jake, I love these videos. Just a question - do you need to carry out a risk assessment before hand for this work or is one already in place? Also any permit to work required or lock out tag out? Thanks
Good video. We always try to tell our apprentices at the shipyard what you have said about isolating each part of the system separately. As you say, it helps you track down the individual problem, and also makes sure that when you use the megger on things, you only will be using it on the parts of the circuit that can handle the high voltages that the megger will put out. If you do not take off any sensing wires or similar things first, then you could be sending 500- 1000 volts from the megger to sensitive electronics, which cannot handle those voltages, creating a far bigger problem than you started out with……
Yes, you are right. But 500V DC is not so much for a 400 V(?) AC powered inverter. Around 560V DC is a normal operational voltage. This VFD has gone anyway.
@@michaelw4258 yes, in that case, you are correct. But in other cases, there are often sensing devices on generators and things that can be burned out by the high voltages that the mergers put out. Those items are what I was mentioning, and was why it is important to isolate these things so they are not burned out by mistake. 🙂
Always, and this fundamental,we isolate sensitive electronic circuits such as AVR etc when we use megger test in case of supplying 500vdc( the generated voltage from megger test)to the electronic circuit with danger of damaging it irreversably.
Question and comment. First of all big fan of your videos, currently subscribed, thank you so much for posting your videos❤ That being said, when you were checking insulation instead of using the Test button on the meter, why didn’t you use the Test button on the red lead?
Thank you so much for posting all your videos! As a shore side electrician I would love to get sea experience. How do I get to be a cadet with you?!?!?🎉
There is usually a minimum insulation resistance value given by the manufacturer. But with no specs a rule of thumb is 1 Meg Ohm per 1,000V plus 1 Meg Ohm. So on a 400V motor like this there should be at minimum 1 to 2 Meg Ohm and he was measuring over 550Meg Ohm. But if he was measuring in the kilo-Ohm range then something would be suspect, it doesn't have to be 0 or very low to fail. With insulation resistance the higher the better.
From my point of view, no reason to disconnect “Delta” connection in the terminal. The measurements with plates or without will be the same. Also I don’t understand why you are going to replace power cable? Is there short circuit?
@@inothome without broken delta connection you can check individual windings! No point to do it, check what does it means delta connection. Even with star you can check without broken connection. If reading between three phase will be different, after that you should brake connection
there are cases where you have equal continuity but all you are measuring is a shorted Lines. The proper IR test is to separate each windings and measure in between. that is only 5 mins additional time to your job.
Kuya idol pwede po mag conduct insulation resistance ng 3phase induction motor kahit naka connect si VFD....hindi po bah masisira si VFD.... salamat po and God bless you......😊
I am the Chief Engineer who work without ETO and I find your videos very interesting and helpful... Great job!
Give me a chance to work with you as an ETO thanks🤩
Good day chief am ETO let me to work with you, kindly
Good day chief am ETO let me to work with you, kindly
Your drawing was perfectly ok.
Absolutely superb discussion and identification of the fault! Thank you so much for the video episode. Excellent!
You really make me wish I could have become a ship electrician. Must be so fun and satisfying. Great video again. Thank you.
You're great professional , I always watch your videos of troubleshooting.
Thanks for the video. I'm a residential HVAC tech, so it's really cool to see this.
Thank you so much for this instructive video. Keep going it. Take care of yourself.
Magaling, bro💪.I told my cadet to subscribe to you.I also have experience, but the video from the blog with the non-working expansion valve helped me a lot.
Nice and good job sir leckyjake. Another additional knowledge about on how the proper elec. Motor winding, VFD and MCB testing/checking...Salamat sa video sir ETO leckyjake....Have a safe and smooth sailing sir.....GOD BLESS YOU 🙏
Thanks brilliant video 👍
Personal experience of using VFD in our workshop
(240 v 1 phase to 380v 3 phase VFD)
Most nights 2300-0300 is perfect faultlessly performance but anytime between 1100-1345 is totally useless 🤔
=
Incoming 240v 10kva line transformer falls away @ 1100-1345 to much demand on area network 😬🤔🤦
perhaps need a solar panel to support the daytime loads?
Thank you for the shared knowledge💙
Very insightful, thank you for sharing 🙏🏽
thank you for watching
Great video lecky. Thank you
Thank you for sharing Sir .... Malaking tulong ang learning n binabahagi nyo... God Bless you po
Thank you my friend. This video very good for everybody.
thank you very much
Excelent my friend, congratulations!
Thank you very much for sharing
Thank you so much sir
Goods experience and explanation
I learnt the lessons of electrical power.I 'll hope you sir, next lesson Thank you
i always learn from you LJ! thanks!
Thanks love your videos im an eto cadet and ur videos help alot
Thank you sir for sharing this so informative video ❤️
Thank you for a New learning Sir⚡
Good video, one advise is taht during you measurment el.motor you can push button of your wire, for youe comfortable
it fails sometime, i just made requisition
It's a very useful Channel 👌 👍
thank you for watching
Very understanding
Thank you
So an other idea would be to go and torque check all the VFDs and Motors , because IF one failed the rest are also in line to fail in similar ways. SO I would suggest take one by one out of commission and re-tighten all the bolts and connections and check for lose connections.
Been a while since I worked as an electrician on motors,kinder remind me on continuity test of windings
Hi Jake, I love these videos. Just a question - do you need to carry out a risk assessment before hand for this work or is one already in place? Also any permit to work required or lock out tag out?
Thanks
Thanks and Regards Bro
excellent 👌👌
i was so happy when you made the drawing
thanks a lot lecky jake. now im e/l cadet hopefully i can gain more knowledge from u. my lecky onboard not too helpful ;(
Can you just establish an academy where people can come for training? You're really doing a great job. Thanks a lot
Good video. We always try to tell our apprentices at the shipyard what you have said about isolating each part of the system separately. As you say, it helps you track down the individual problem, and also makes sure that when you use the megger on things, you only will be using it on the parts of the circuit that can handle the high voltages that the megger will put out.
If you do not take off any sensing wires or similar things first, then you could be sending 500- 1000 volts from the megger to sensitive electronics, which cannot handle those voltages, creating a far bigger problem than you started out with……
Yes, you are right. But 500V DC is not so much for a 400 V(?) AC powered inverter. Around 560V DC is a normal operational voltage. This VFD has gone anyway.
@@michaelw4258 yes, in that case, you are correct. But in other cases, there are often sensing devices on generators and things that can be burned out by the high voltages that the mergers put out. Those items are what I was mentioning, and was why it is important to isolate these things so they are not burned out by mistake. 🙂
Always,
and this fundamental,we isolate sensitive electronic circuits such as AVR etc when we use megger test in case of supplying 500vdc( the generated voltage from megger test)to the electronic circuit with danger of damaging it irreversably.
Question and comment. First of all big fan of your videos, currently subscribed, thank you so much for posting your videos❤
That being said, when you were checking insulation instead of using the Test button on the meter, why didn’t you use the Test button on the red lead?
sometimes it fails, there is something wrong on my probe that needs replacement. I already requested it and still waiting for the spare
@@leckyjake I have a keysight Insulation Multimeter, same issue. Bottom on test leads is defective😂
Thank you so much for posting all your videos! As a shore side electrician I would love to get sea experience. How do I get to be a cadet with you?!?!?🎉
Good job lecky
Magandang hapon po sir watching po
thank you
Rip mahn.. you will be missed..
if power cable connected to a mot not giving low insulation res during test what purpose to disconnect cable?
Present lods😊
❤
he too good!
hi. im curious, why is it necessary to also replace the vfd? thank you.
Hi sir, in my ship our main cooling sea water vfd showing fan failure. Fan is actually not accessible what is the solution?
you have to access the fan ofcourse
Insulane motor is good condition.. so where is the proublem? VFD or MCCB?
hi sir, paano po mag ojt or internship sa barko na katulad po ng ginagawa ninyo, paano po magapply. thanks po
What would the tester show if there was a fault?
0
0Ω or 1Ω if good you will see >1000MΩ
There is usually a minimum insulation resistance value given by the manufacturer. But with no specs a rule of thumb is 1 Meg Ohm per 1,000V plus 1 Meg Ohm. So on a 400V motor like this there should be at minimum 1 to 2 Meg Ohm and he was measuring over 550Meg Ohm. But if he was measuring in the kilo-Ohm range then something would be suspect, it doesn't have to be 0 or very low to fail. With insulation resistance the higher the better.
Where are you now in ship or sign out?
😂😂
From my point of view, no reason to disconnect “Delta” connection in the terminal. The measurements with plates or without will be the same. Also I don’t understand why you are going to replace power cable? Is there short circuit?
He broke the delta so he could check individual winding resistances. He mentioned he checked them but didn't show it.
@@inothome without broken delta connection you can check individual windings! No point to do it, check what does it means delta connection. Even with star you can check without broken connection. If reading between three phase will be different, after that you should brake connection
there are cases where you have equal continuity but all you are measuring is a shorted Lines. The proper IR test is to separate each windings and measure in between. that is only 5 mins additional time to your job.
@@leckyjake Exactly!! Do it right and it only takes a few extra minutes.
Sir how you replace vfd and power cable in that make that video also sir
sire thing
Kuya idol pwede po mag conduct insulation resistance ng 3phase induction motor kahit naka connect si VFD....hindi po bah masisira si VFD.... salamat po and God bless you......😊
Isolate muna si VFD bago mag megger.
wow puro fluke
Where was the actual fault ?
loose wiring in the VFD