Comments for Ignorance is Bliss http://joesitohang.wordpress.com JoeSitohang Mon, 07 Sep 2009 13:14:25 +0000 http://wordpress.com/ hourly 1 Comment on 3 Phase alternating current Motor Troubleshooting by Rick C. http://joesitohang.wordpress.com/2008/10/27/3-phase-alternating-current-motor-troubleshooting/#comment-167 Rick C. Mon, 07 Sep 2009 13:14:25 +0000 http://joesitohang.wordpress.com/?p=174#comment-167 Some motors will run in reverse if they are spinning already when power is energized. This can happen if another blower is hooked to the same air duct or a draft is created that causes the problem blower to spin in reverse. You might check to see if this blower is running backwards while power is off. Good Luck with your problem Some motors will run in reverse if they are spinning already when power is energized. This can happen if another blower is hooked to the same air duct or a draft is created that causes the problem blower to spin in reverse. You might check to see if this blower is running backwards while power is off. Good Luck with your problem

]]> Comment on 3 Phase alternating current Motor Troubleshooting by Joe Sitohang http://joesitohang.wordpress.com/2008/10/27/3-phase-alternating-current-motor-troubleshooting/#comment-163 Joe Sitohang Fri, 22 May 2009 06:11:33 +0000 http://joesitohang.wordpress.com/?p=174#comment-163 @ Yousif Please verify your motor alignment are correct or uncorrect @ Yousif
Please verify your motor alignment are correct or uncorrect

]]> Comment on 3 Phase alternating current Motor Troubleshooting by Yousif http://joesitohang.wordpress.com/2008/10/27/3-phase-alternating-current-motor-troubleshooting/#comment-162 Yousif Thu, 21 May 2009 18:39:37 +0000 http://joesitohang.wordpress.com/?p=174#comment-162 I have electrical motor three phase, vibration symptoms in this motor as fallows; 1-Twice running speed is excitation with running speed at 1800 rpm. I did high resolution and there is no side band which is confirmed there no winding problem. I checked current phase and found the following> phase A is 121A phase B is 118 A phase C is 130 A My question, why there is twice running speed is excitation with running speed and make it beating (running speed with twic running speed are jonied toghther), running speed is constant. I have electrical motor three phase, vibration symptoms in this motor as fallows;

1-Twice running speed is excitation with running speed at 1800 rpm. I did high resolution and there is no side band which is confirmed there no winding problem. I checked current phase and found the following>

phase A is 121A
phase B is 118 A
phase C is 130 A

My question, why there is twice running speed is excitation with running speed and make it beating (running speed with twic running speed are jonied toghther), running speed is constant.

]]> Comment on 3 Phase alternating current Motor Troubleshooting by Joe Sitohang http://joesitohang.wordpress.com/2008/10/27/3-phase-alternating-current-motor-troubleshooting/#comment-161 Joe Sitohang Mon, 18 May 2009 12:31:43 +0000 http://joesitohang.wordpress.com/?p=174#comment-161 for your case i think you need to check the lines sequence by “3 Phase rotation tester” please verify the R-S-T sequence are correct before you decide to replace the motors for your case i think you need to check the lines sequence by “3 Phase rotation tester” please verify the R-S-T sequence are correct before you decide to replace the motors

]]> Comment on 3 Phase alternating current Motor Troubleshooting by dave wagman http://joesitohang.wordpress.com/2008/10/27/3-phase-alternating-current-motor-troubleshooting/#comment-159 dave wagman Sun, 17 May 2009 15:47:44 +0000 http://joesitohang.wordpress.com/?p=174#comment-159 I am an hvac tech and Im working on a 3PH rooftop unit that the blower runs in reverse .We switch legs and runs proper rotation.2 days later same thing happens again .so far this has happen 3x in a week on the same unit. I check volts and amp draw L1 7.4A 120v to grnd. L2 7.4A 120v to grnd. L3 7.1A 120v to grnd . Voltage checks were done coming out of overload.can u tell me what would cause this condition .my next step is replacing the motor. thanks for any explaination. Baffled Tech ?? I am an hvac tech and Im working on a 3PH rooftop unit that the blower runs in reverse .We switch legs and runs proper rotation.2 days later same thing happens again .so far this has happen 3x in a week on the same unit. I check volts and amp draw L1 7.4A 120v to grnd. L2 7.4A 120v to grnd. L3 7.1A 120v to grnd . Voltage checks were done coming out of overload.can u tell me what would cause this condition .my next step is replacing the motor. thanks for any explaination. Baffled Tech ??

]]> Comment on HTML Code Banner BlogSitohang by marto http://joesitohang.wordpress.com/2008/11/17/banner-blogsitohang-html-code/#comment-158 marto Tue, 21 Apr 2009 08:43:05 +0000 http://joesitohang.wordpress.com/?p=213#comment-158 kok ga bisa y bang ?!!! pa haruz pny fotona yupz?? kl iy aku ga punya neh fotona :( kok ga bisa y bang ?!!!
pa haruz pny fotona yupz??
kl iy aku ga punya neh fotona :(

]]> Comment on Make a wish ‘2009′ by febiola sitohang... http://joesitohang.wordpress.com/2009/01/09/make-a-wish-2009/#comment-156 febiola sitohang... Wed, 11 Mar 2009 09:56:09 +0000 http://joesitohang.wordpress.com/?p=276#comment-156 so sweettttttttt.......... 2008 yang bgitu berkesan, you are the Great Year 2009 i have make a wish, Get Married !!! so sweettttttttt……….
2008 yang bgitu berkesan, you are the Great Year
2009 i have make a wish, Get Married !!!

]]> Comment on SolidWorks 2009 Seminar by joe Sitohang http://joesitohang.wordpress.com/2009/01/21/solidworks-2009-seminar/#comment-154 joe Sitohang Sat, 24 Jan 2009 03:59:03 +0000 http://joesitohang.wordpress.com/?p=286#comment-154 @David W waitin' for next aja mas..hehe... kalo interest dengan software ini silahkan saja contact direct ke agent SolidWorks yg ada di-batam: info@disamtingpratama.com smoga membantu... Cheers, -Joe- @David W
waitin’ for next aja mas..hehe… kalo interest dengan software ini silahkan saja contact direct ke agent SolidWorks yg ada di-batam: info@disamtingpratama.com
smoga membantu…
Cheers,
-Joe-

]]> Comment on SolidWorks 2009 Seminar by David W http://joesitohang.wordpress.com/2009/01/21/solidworks-2009-seminar/#comment-153 David W Wed, 21 Jan 2009 09:45:27 +0000 http://joesitohang.wordpress.com/?p=286#comment-153 waduh telat nih,...daftar waduh telat nih,…daftar

]]> Comment on Persoalan2 Operasi Sistem Tenaga Listrik by joe Sitohang http://joesitohang.wordpress.com/2008/09/02/persoalan2-operasi-sistem-tenaga-listrik/#comment-152 joe Sitohang Mon, 19 Jan 2009 02:18:52 +0000 http://joesitohang.wordpress.com/?p=54#comment-152 @ ajun kemungkinannya banyak sekali yaa, bisa saja relay pengaman feeder jenuh atau malah tidak kerja samasekali (Rusak) kemudian relay pengaman generator akan merespon kondisi tsb dan atas settingan eksis tentunya akan muncul perintah tertentu, bisa melepas CB atau malah men-Trip Engine, utk menghindari trouble ini perlu dilakukan uji individual rutin baik pada perangkat pengaman feeder maupun perangkat pengaman generator itu sendiri, pastikan setting besaran pada system pengaman anda sudah benar dan bekerja normal, smoga membantu. @ ajun
kemungkinannya banyak sekali yaa, bisa saja relay pengaman feeder jenuh atau malah tidak kerja samasekali (Rusak) kemudian relay pengaman generator akan merespon kondisi tsb dan atas settingan eksis tentunya akan muncul perintah tertentu, bisa melepas CB atau malah men-Trip Engine, utk menghindari trouble ini perlu dilakukan uji individual rutin baik pada perangkat pengaman feeder maupun perangkat pengaman generator itu sendiri, pastikan setting besaran pada system pengaman anda sudah benar dan bekerja normal, smoga membantu.

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