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  • Users: lefty51
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  1. lefty51

    Monguzzi controller / anyone familiar?

    Service call today, to assist on machine at veneer mill. It's a MONGUZZI machine from Italy. It has MMI for operator to use ( limited as to interface options ). This communicates to ALCAN plc cabinet. Found some electrical issues, loose grounds, broken shield on servo controller. Still having...
  2. lefty51

    Vfd cable terminations / braiding, shielding, etc

    Currently doing a small industrial job, installing cabling for ( 20 ) 5 hp motors. There seems to be a wide opinion of how the vfd cables should be terminated....braiding, shielding, etc Any advice would be appreciated ,or any links as well. Thx.
  3. lefty51

    Grounding on boat for load centre

    Buddy is installing a 60 amp lighting panel ( load centre ) on a tug boat. 2 questions: 1 - He asked me how to ground everything, since the frame of the boat is used as ground for 24 volt DC in some cases. I said that on the tugs that I have worked on, 120V receptacles are mounted on the...
  4. lefty51

    5 KA short circuit amps / symetrical

    Received a call today from maintenance. They are going to be hooking up an convection heater. Rating is 55 FLA. On the front of the panel, it states " short circuit amps - 5KA - symetrical ". Inspector mentioned something to one of the maintenance personnel, that we may have to install a...
  5. lefty51

    Thread # 238 - 240372 / relay for battery charging system

    I put a thread in the electrical engineering forum. Im thinking perhaps it should have gone here. Pls reference above # to check out, and provide any comments. Thx, ( Thread # 238 - 240372 )
  6. lefty51

    Relay on battery charging system / tugboat

    Im doing some work for a marina. They asked me to check out the battery charging system, on a tugboat. Boat is very old, and the prints are in dutch. Relay in the charging system starts clicking rapidly, ( sometimes...but not always ) but of course never when Im there to check it. It does not...
  7. lefty51

    3 phase Heater on soft start .

    A project was done in house, where they had to install a 480 V - 3 phase tank heater ( I am not sure of the KW rating ), in a spare tub, which is a soft start. I believe it normally draws 92 amps....or very close to that. The main MCC breaker tripped, and someone wondered if it was because the...

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