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  1. powerjunx

    VFD 400VAC adjustment

    Itsmoked, thanks! overloading causes the motor to fail as its spin faster than the rated rpm. Jraef, line voltage is 440V. "..the more, the merrier" Genghis Khan
  2. powerjunx

    vegaflex 81 erratic reading?

    hello there, i got an erratic reading of vegaflex 81 which measures the level of LPG Economizer Tank.. This tank is use either FLSC (flash liquid sub-cooling) or LSC operation. 2 out of 3 (separate) tanks has experience erratic reading where the level control valves restlessly moving 0 to 80%...
  3. powerjunx

    Operating 50 Hz motor on 60 Hz using VFD

    Junaid16, i had recent problem with this stuff. 400V/50HZ motor, 440V/60HZ VFD output control by pot full scale. Burn out motor winding, i suspected the motor over-voltage/over-frequency due to mis-configuration of VFD setting. Prior replacement of the motor, i set VFD output 400V/50HZ with...
  4. powerjunx

    Basis of ADC counts?

    Hello, there! Anyone who is familiar with Kongsberg Automation, can you crack for me the Basis of ADC counts? I tried using mobile apps for ADC to calculate as per table below but i am confuse. As shown on attachment.. "..the more, the merrier" Genghis Khan...
  5. powerjunx

    VFD 400VAC adjustment

    John2025, i think i am in the right adjustment for my voltage output reducing 100%(440v) down to 91% (400v)setting. Thank you for confirming me this. But i am not sure this make sense for vfd in v/f mode controlled by pot. Anyway, i had measured the vfd output, 400v/50hz for pot full range...
  6. powerjunx

    LNG Compressor

    Hello, anyone who had good comparison or alternative for Burckhardt compressor for LPG/LNG reliquafication plant? Thanks "..the more, the merrier" Genghis Khan
  7. powerjunx

    Standby Diesel Generator - Switching Loads Question

    I saw one commissioning of generator: Maximum load is a composite calculation on each motor started at a time,as; sQRT3 x V x starting current x PF at starting, Starting current depends starting methods (DOL, Y/D, Auto-trans, etc.) "..the more, the merrier" Genghis Khan
  8. powerjunx

    VFD 400VAC adjustment

    Hello, I got a burn out motor winding due to mis-configuration of VFD setting. Yet, i could never find motor data setting on VFD for Voltage rating, however only percent voltage output (VFD) is available. So i tried to play along this voltage output as well as frequency adjustment to coincide...
  9. powerjunx

    Eprom problem

    Thanks, Keith. Thinking of your comments. Unfortunately, i don't have access to EPROM programmer. I realized that these controller were 16 units in operation. I believe a spare set is somewhere hidden. Luckily, I just found 2 spare EPROM on the shelf.. All labeled and scribbled with same...
  10. powerjunx

    Eprom problem

    Yeah, Mike you are right. I don't want to explore the unknown. I bet, it is time to call the service expert. Thank you for your comments. You have shared another good insights. "..the more, the merrier" Genghis Khan
  11. powerjunx

    Eprom problem

    Thank you Mike. I have the configuration default setting from makers compiled in the instruction manual. I got same EEPROM from new spare attach on CPU print. As you had suggested, i am planning to install and mount it to the cpu print. Though it takes time, I guess i am going to manually...
  12. powerjunx

    Eprom problem

    Here's the complete set of the controller. If you think that replacing EEPROM would solve the issue. Then that's one thing for sure i miss! need to replace that EEPROM. "..the more, the merrier" Genghis Khan...
  13. powerjunx

    Eprom problem

    Hello Mike.. here's the EEPROM and CPU card. "..the more, the merrier" Genghis Khan http://files.engineering.com/getfile.aspx?folder=6868ef57-b98e-445c-b3bf-57a98ea2a2ab&file=Photo1766.jpg
  14. powerjunx

    Eprom problem

    yeah very odd indeed. unisab II maker SABROE was bought by YORK Refrigeration. Aalborg boilers MISSION OC were fitted with this kind of controllers. Mike, my guess is that this EPROM was packed with different SW preloaded program. I scrolled down and hard reset the controller. Upon restart...
  15. powerjunx

    Eprom problem

    Thanks for your reply. Mike, it is a unisab II controller for Aalborg Marine Boiler. Good point for such device you mention however i am solely dependent on operational observation of the boiler status and diagnostic functions. According to data sheet, such EPROM has 2MB capacity and the...
  16. powerjunx

    Eprom problem

    Hello, i got a controller having 2 EPROM (SST27SF020-70-3C-PH), CPU and EEPROM. Already confirm good condition of terminal connections as well as simulation test of I/O's thru keypad input. What i found is that the system never responds to the operational keypad input (such as starting a fan...
  17. powerjunx

    Airconditioning Cooler Regulation?

    Got here Aircon unit with old documents. Pages were torn and more missing. Attached pic, i found page with Graphical Cooler Regulation??? Anyone plz elaborate what this mean? It's a Standard ARP of York Refrigeration, Marine & Controls. Comments well appreciated. "..the more, the merrier"...
  18. powerjunx

    Megger Testing in Hazardous Location

    Hi, oldfield.. Can you provide me a link about your guidelines or checklist upon completing HOT Work Permit? Any adapted standard practice incorporated to your program? Thanks. "..the more, the merrier" Genghis Khan
  19. powerjunx

    Megger Testing in Hazardous Location

    Hello, Can anybody provide me any suggestions about standard practice or precautionary measures of conducting Megger Test in Hazardous Area containing Hydrocarbons. It is a topside electric motor pump as well as gauging instrument devices of loaded crude oil tanker. A link of brief literature...
  20. powerjunx

    Cycloconverter Upgrade info

    scot, nice link for cyclo-converter..Though, i am confuse with synchro-converter. "..the more, the merrier" Genghis Khan

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