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Permissible inrush current single phase

Anthony Dicker

Hi

I have had the misfortune to buy a Lincat Combination Oven for my Hotel.

These normally come in 10kw three phase.  3 x  13amps That's not too bad.

I have the single phase version 1 x 39 amps. Not so good.

It is operating at 1 second on 39 amps

                          0.2 second off  0 amps

                          Cycling continually. for hours.

I have a 40kva single phase supply and can hear the current hammering away incessantly. Lights flickering etc. I asked the manufacture for details of soft starting and duty cycle. They say this is the way they were designed to work. Bang on and Bang off --1 second cycle continually.

I don't have a current (Hee Hee)  Reg book. So I ask is there a reg in place that covers the single phase load criteria.

To add insult to injury-- I have a three phase 65kva standby set.-- I would not put that destructive abuse on one of my 20kva phases, it would shake it apart. So I cannot run it.

Regards -- Tony

Parents
  • 0

    Is there a reason that you went for the single phase version rather than the three phase option?

    Clive

  • 0 in reply to AncientMariner

    Hi Clive.    We are on a single phase mains power supply. About 200 yds from the transformer. They would want a squillion bucks to convert the line.

    To complicate the issue we have a three phase genset. I would need to put the combi on one of the  20kva phases.   I have 3 x 20kva phases and I think the  10kva violently oscillating (50 times a min)- load would damage the set.

    I have looked at a single to three phase converter so I can later get a three phase combi, but the converters can be problematic.

    I fitted a converter  for a pal and the middle phase was not a true phase- just  a ghost phase. That would make a combi have kittens.

    The thing supplied under the LINCAT badge has multiple faults since new. Lincat sent out techs FIVE  times and it still is not fit for purpose. I have taken them to court and the first line in thier defense is --the Machine with Lincat plastered all over it-- and a Lincat warrantee is nothing to do with them --They just tried to repair it five times for a laugh.

    Regards  Tony

Reply
  • 0 in reply to AncientMariner

    Hi Clive.    We are on a single phase mains power supply. About 200 yds from the transformer. They would want a squillion bucks to convert the line.

    To complicate the issue we have a three phase genset. I would need to put the combi on one of the  20kva phases.   I have 3 x 20kva phases and I think the  10kva violently oscillating (50 times a min)- load would damage the set.

    I have looked at a single to three phase converter so I can later get a three phase combi, but the converters can be problematic.

    I fitted a converter  for a pal and the middle phase was not a true phase- just  a ghost phase. That would make a combi have kittens.

    The thing supplied under the LINCAT badge has multiple faults since new. Lincat sent out techs FIVE  times and it still is not fit for purpose. I have taken them to court and the first line in thier defense is --the Machine with Lincat plastered all over it-- and a Lincat warrantee is nothing to do with them --They just tried to repair it five times for a laugh.

    Regards  Tony

Children
  • 0 in reply to Anthony Dicker

    Is the transformer pole mounted?  Reason I ask is to establish whether the existing transformer is single or three phase. If it is pole mounted, are there 2 or 3 High Voltage lines connected to it via large insulators?  If in a building, then ignore this question.

    Also, is your supply overhead or underground?

    Clive

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