});


Results 1 to 5 of 5
  1. #1
    Join Date
    Nov 2008
    Location
    Singapore
    Age
    36
    Posts
    30
    Rep Power
    0

    Daikin Inverter Unit at IT System (No Neutral)



    Hi,

    Would like to check, we have one project which is for ship/vessel with Daikin inverter unit.

    we are planning to supply Daikin Inverter unit for Vessels which is unearthed system ( 3 wire system, No Neutral).
    The Daikin unit is commercial usage one and designed for Line and Neutral (230V, L+N), however the vessel voltage is Line to Line(L1+L2) , but the voltage is same.

    My service person is saying that, the system need neutral otherwise system will not function.
    Now, We are worrying that the inverter unit might not work in L1 + L2 supply.
    Any one having this experience?.



  2. #2
    Join Date
    Oct 2001
    Location
    Nottingham UK
    Posts
    5,130
    Rep Power
    43

    Re: Daikin Inverter Unit at IT System (No Neutral)

    Not sure of the L1+L2 system, but here in the UK, if you start the inverter unit without a Neutral attached it blows the inverter pcb.
    I'm back on the Pale

  3. #3
    Join Date
    Apr 2008
    Location
    Southampton, England
    Age
    43
    Posts
    932
    Rep Power
    29

    Re: Daikin Inverter Unit at IT System (No Neutral)

    Have fitted MHI units on a ship. Can't remember the exact details but think standard for ships is 240 but split across L1 and L2, bit like 110V site transformers that are centre tapped.
    Anyway, this setup was like that and I was pretty surprised to see it fire up with no problems.

    Cheers,
    Andy.

  4. #4
    Join Date
    Aug 2014
    Location
    UK
    Age
    70
    Posts
    445
    Rep Power
    19

    Re: Daikin Inverter Unit at IT System (No Neutral)

    You require a transformer sized for the unit ,where the primary circuit is connected to L1and L2 ,the secondary will give you your single phase ,live and neutral connection for the unit. You should be able to get a suitable transformer via your electrical supplier or get one wound to suit the job .
    When you have a 3 phase power supply without a neutral, using a transformer will give you the required output live and neutral connections.

  5. #5
    Join Date
    Nov 2008
    Location
    Singapore
    Age
    36
    Posts
    30
    Rep Power
    0

    Re: Daikin Inverter Unit at IT System (No Neutral)

    Quote Originally Posted by Glenn Moore View Post
    You require a transformer sized for the unit ,where the primary circuit is connected to L1and L2 ,the secondary will give you your single phase ,live and neutral connection for the unit. You should be able to get a suitable transformer via your electrical supplier or get one wound to suit the job .
    When you have a 3 phase power supply without a neutral, using a transformer will give you the required output live and neutral connections.
    As mentioned, the voltage is same 230V but thing is Line to Line, Not Line to Neutral.
    as per the daikin unit is designed for L to N (230V), the connection to L to L (230V) is at our own risk.

    In vessel/Hull all the lighting are connected with L to since no neutral.

    Experienced guy (who has the filed experience) guided now, should have neutral , otherwise unit will not function. but not sure why...

    each unit current is apprx 15amps.. in this case the transformer is too heavy to install.....

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •