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B

Becko

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Hey fellas,

Anybody know if there is a time clock to do this or is it just not correct to do this?

Cheers in advance
 
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R

rumrunner

  • Thread Starter Thread Starter
  • #2
HI,
i may be wrong but i dont think theres any regulations preventing it ,never come accross it myself .i would be inclined to use a radial circuit to feed the sockets that which nead timed rather than a ring,sangamo time clocks are rated at 10a ,if you need to switch more than this you could use a contactor.
hope this helps
 
G

Grae79

  • Thread Starter Thread Starter
  • #3
why do you want a time clock to control a ring main?
 
B

Becko

  • Thread Starter Thread Starter
  • #4
Right, let me explain properly....

What i've got is a job spec for wiring a circuit to supply 4 x 2kw Dimplex panel heaters, and the circuit being controlled by an electronic time clock.

I have a few ideas but wondered the best solution as its not really something I've come across much?

thanks
 
R

rumrunner

  • Thread Starter Thread Starter
  • #5
Heres a link ,because your switching a resistive load ,heres a expensive but efficient solution ,Watlow Ltd-Power Controllers ,it might seem like overkill but combined in a suitable panel with a digital time clock would provide a first class job ,use 4 of the single phase contactors,each on its own radial ,"fused" in the control panel which you can easyly build to house it all ,
thats what i would do anyway
 
R

Reg Man

  • Thread Starter Thread Starter
  • #6
Heres a link ,because your switching a resistive load ,heres a expensive but efficient solution ,Watlow Ltd-Power Controllers ,it might seem like overkill but combined in a suitable panel with a digital time clock would provide a first class job ,use 4 of the single phase contactors,each on its own radial ,"fused" in the control panel which you can easyly build to house it all ,
thats what i would do anyway

Thats the way I would go also. Din rail time clock, four radials, a 4 pole contactor and a fused spur by each heater. Nice.
 
D

DanBrown

  • Thread Starter Thread Starter
  • #8
That sounds a good design,
my question would relate to the contactor.

Is it right that 4 x 2kw heaters all turning on at the same time would be right for the contactor?, as this is the switched load and not isolated load. 8000 watts divided by 230 volts would be in region of 35 amps, not taking into account diversity obviously as i dont know off top of my head and havent got book in front of me!

What's you feedback on this?, are these contactors designed for switching this type of load?, as i dont tend to use them myself.

Thanks Anyway!
 
R

rumrunner

  • Thread Starter Thread Starter
  • #9
That sounds a good design,
my question would relate to the contactor.

Is it right that 4 x 2kw heaters all turning on at the same time would be right for the contactor?, as this is the switched load and not isolated load. 8000 watts divided by 230 volts would be in region of 35 amps, not taking into account diversity obviously as i dont know off top of my head and havent got book in front of me!

What's you feedback on this?, are these contactors designed for switching this type of load?, as i dont tend to use them myself.

Thanks Anyway!
hi ,
contactors are made to switch loads which are not isolated ,ie ,on line , diverserty is not applicable in this case ,as the heater would be either on or off, i would be inclined to use single phase contactors so each heater could be controled seperate.
have a look at the link i put in the earlier post ,it wouldnt be essential to go to these lengths ,any contactor capable of switching the load would do.

hope that answers your question ,or have i missunderstod what it is your asking?
 
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