Wireless Control of Sockets with 2KVA loads

D

David Longley

Guest
I have a couple of Micromark remote controlled plug in MM2w3098 BSEN 730
mains switches. Unfortunately, they have 5amp fuses and are rated up to
1200W only - I have two 2.1KVA 240 to 110 volt step down transformers
which I need to run. These two transformers power 1) 110V TRUE domestic
treadmill and 2) 110V TRUE domestic elliptical trainer, ie only one unit
per socket.

Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
--
David Longley
 
"David Longley" <David@longley.demon.co.uk> wrote in message
news:C5ibhnrRF7X$Ewuu@longley.demon.co.uk...
I have a couple of Micromark remote controlled plug in MM23098 BSEN 730
mains switches. Unfortunately, they have 5amp fuses and are rated up to
1200W only - I have two 2.1KVA 240 to 110 volt step down transformers
which I need to run. These two transformers power 1) 110V TRUE domestic
treadmill and 2) 110V TRUE domestic elliptical trainer, ie only one unit
per socket.

Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
--
David Longley
Click to expand...
Not fully with you on this David. (?) Isn't possible to plug the
transformers directly into the 13 amp sockets ? What are you using the
remote switches for ? And please don't fit higher rated fuses to equipment
that is not meant to take that current. That would be very dangerous
indeed. 8~(

I always thought that Micromark equipment was only rated for lighting or
security installations. I've never thought of Micromark as being in the
general heavy duty domestic electrical market. I'm usually wrong with this
type thinking though, and I'm sure I'll be told different. :)) Anyway,
this type of thing:

<http://www.easiaids.co.uk/Catalogue/Envir_Controls/envir_controls.html>

is all I can think of that would do the job I think you want to do.


---
http://www.basecuritysystems.no-ip.com

Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.516 / Virus Database: 313 - Release Date: 01/09/03
 
Suggestion:
Why don't you simply use the controllers to operate a relay contactor
sized to handle the load of the equipment. You can put the relay
contacts either on the primary or secondary side of the transformer.

RFI-EMI-GUY


David Longley wrote:

I have a couple of Micromark remote controlled plug in MM2w3098 BSEN
730 mains switches. Unfortunately, they have 5amp fuses and are rated
up to 1200W only - I have two 2.1KVA 240 to 110 volt step down
transformers which I need to run. These two transformers power 1) 110V
TRUE domestic treadmill and 2) 110V TRUE domestic elliptical trainer,
ie only one unit per socket.

Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
Click to expand...


--
Joe Leikhim K4SAT


"Jazz is not dead. It just smells funny." -F.Z.
 
Thanks to both of you.

I'm not sure what relay contactors are, I can guess but I've not seen
them commercially available. Let me elaborate. These 5am fused, 1200W
rated "plugs" go into the wall socket and have a female outlet on them.
They have an on/off switch and can be switched on or off by radio
control remotes. These in themselves are relay-contactors presumably. I
take the point that I shouldn't replace the 5A with a 13A fuse, but what
I need is one of these that will handle what is, after checking, a 2KVA
transformer.

In article <3F5FDF12.1050503@NoSpamBogus.com>, **THE-RFI-EMI-GUY**
<NoSpamBogus@NoSpamBogus.com> writes
Suggestion:
Why don't you simply use the controllers to operate a relay contactor
sized to handle the load of the equipment. You can put the relay
contacts either on the primary or secondary side of the transformer.

RFI-EMI-GUY


David Longley wrote:

I have a couple of Micromark remote controlled plug in MM2w3098 BSEN
730 mains switches. Unfortunately, they have 5amp fuses and are rated
up to 1200W only - I have two 2.1KVA 240 to 110 volt step down
transformers which I need to run. These two transformers power 1) 110V
TRUE domestic treadmill and 2) 110V TRUE domestic elliptical trainer,
ie only one unit per socket.

Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
Click to expand...
--
David Longley
 
www.maplin.co.uk

stock item L23AF.
radio remote controlled 13A switching.

Pack of 4 39.99

[Electrical-Home Automation -Remote Control]
On Thu, 11 Sep 2003 07:30:40 +0100, David Longley
<David@longley.demon.co.uk> wrote:

Thanks to both of you.

I'm not sure what relay contactors are, I can guess but I've not seen
them commercially available. Let me elaborate. These 5am fused, 1200W
rated "plugs" go into the wall socket and have a female outlet on them.
They have an on/off switch and can be switched on or off by radio
control remotes. These in themselves are relay-contactors presumably. I
take the point that I shouldn't replace the 5A with a 13A fuse, but what
I need is one of these that will handle what is, after checking, a 2KVA
transformer.

In article <3F5FDF12.1050503@NoSpamBogus.com>, **THE-RFI-EMI-GUY**
NoSpamBogus@NoSpamBogus.com> writes
Suggestion:
Why don't you simply use the controllers to operate a relay contactor
sized to handle the load of the equipment. You can put the relay
contacts either on the primary or secondary side of the transformer.

RFI-EMI-GUY


David Longley wrote:

I have a couple of Micromark remote controlled plug in MM2w3098 BSEN
730 mains switches. Unfortunately, they have 5amp fuses and are rated
up to 1200W only - I have two 2.1KVA 240 to 110 volt step down
transformers which I need to run. These two transformers power 1) 110V
TRUE domestic treadmill and 2) 110V TRUE domestic elliptical trainer,
ie only one unit per socket.

Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
Click to expand...
Lawrence

usenet at lklyne dt co dt uk
 
David Longley wrote:

Thanks to both of you.

I'm not sure what relay contactors are, I can guess but I've not seen
them commercially available. Let me elaborate. These 5am fused, 1200W
rated "plugs" go into the wall socket and have a female outlet on them.
They have an on/off switch and can be switched on or off by radio
control remotes. These in themselves are relay-contactors presumably. I
take the point that I shouldn't replace the 5A with a 13A fuse, but what
I need is one of these that will handle what is, after checking, a 2KVA
transformer.
Click to expand...

They are probably solid state triacs. You might be able to stick a
bigger one in, but I susepct this may overlaod other parts of teh circuitry.

You are going to have to build something - possible switched by theunist
you have - that handles a bigger load, period.

Other truiacs, or contactors, are your best ebt.

Sorry, don't have any references for either right now.


In article <3F5FDF12.1050503@NoSpamBogus.com>, **THE-RFI-EMI-GUY**
NoSpamBogus@NoSpamBogus.com> writes

Suggestion:
Why don't you simply use the controllers to operate a relay contactor
sized to handle the load of the equipment. You can put the relay
contacts either on the primary or secondary side of the transformer.

RFI-EMI-GUY


David Longley wrote:

I have a couple of Micromark remote controlled plug in MM2w3098 BSEN
730 mains switches. Unfortunately, they have 5amp fuses and are rated
up to 1200W only - I have two 2.1KVA 240 to 110 volt step down
transformers which I need to run. These two transformers power 1)
110V TRUE domestic treadmill and 2) 110V TRUE domestic elliptical
trainer, ie only one unit per socket.

Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
Click to expand...
 
In article <C5ibhnrRF7X$Ewuu@longley.demon.co.uk>,
David Longley <David@longley.demon.co.uk> writes:
I have a couple of Micromark remote controlled plug in MM2w3098 BSEN 730
mains switches. Unfortunately, they have 5amp fuses and are rated up to
1200W only - I have two 2.1KVA 240 to 110 volt step down transformers
which I need to run. These two transformers power 1) 110V TRUE domestic
treadmill and 2) 110V TRUE domestic elliptical trainer, ie only one unit
per socket.

Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
Click to expand...
X10 appliance modules spring to mind until you mentioned the 110V
transformers. The switches are rated 13A resistive load, 1A inductive
load. However, I notice the most recent one I bought just says 13A
on it without any indication of a reduction for inductive loads.

These units use signalling carried over the mains, but X10 can be
carried over RF too, and there's a separate plug-in converter.

--
Andrew Gabriel
 
In article <C5ibhnrRF7X$Ewuu@longley.demon.co.uk>,
David Longley <David@longley.demon.co.uk> wrote:
I have a couple of Micromark remote controlled plug in MM2w3098 BSEN 730
mains switches. Unfortunately, they have 5amp fuses and are rated up to
1200W only - I have two 2.1KVA 240 to 110 volt step down transformers
which I need to run. These two transformers power 1) 110V TRUE domestic
treadmill and 2) 110V TRUE domestic elliptical trainer, ie only one unit
per socket.

Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
Click to expand...
It wouldn't, and I'd think you'd find it difficult to find a 12 amp fuse
anyway.

Don't the makers do a suitably rated version?

It's one of those things that would be pretty easy to build using
suitable relays, but would involve an extra 'box'. I'd guess size is the
reason the present one is of limited current handling capability.

--
*Succeed, in spite of management *

Dave Plowman dave.sound@argonet.co.uk London SW 12
RIP Acorn
 
Is there anything else on the market I could use in their place? I
suspect increasing the fuse to 12A would *not* be a good idea.
Click to expand...
What is the purpose of the switching? They seem unusual appliances to
require it. The only scenario I could come up with was that you had a small
quantity of equipment for a public gym, such as in a hotel that you wanted
shut down during prescribed unsociable hours, or when no supervisor is
available.

Assuming that you want both shut down simultaneously, I would recommend
using something like a 32/40A contactor located in a suitable 1/2 way
consumer unit near to the appliances feeding two single sockets (you
shouldn't use a double socket if you expect the total usage of both
appliances to exceed 13A). The main feed for these would be off the original
(adequete) supply circuit using suitable cable (i.e. 6mm). The control line
could be fed from pretty much any of the remote switches you are
considering. It will be a tiny load and almost any switch will do.

Christian.
 
"David Longley" wrote
| I have a couple of Micromark remote controlled plug in MM2w3098 BSEN 730
| mains switches. Unfortunately, they have 5amp fuses and are rated up to
| 1200W only - I have two 2.1KVA 240 to 110 volt step down transformers
| which I need to run. These two transformers power 1) 110V TRUE domestic
| treadmill and 2) 110V TRUE domestic elliptical trainer, ie only one unit
| per socket.

Surely it is the current/power drawn by the appliances which determines the
switching requirements rather than the rating of the transformers?

Owain
 
Surely it is the current/power drawn by the appliances which determines the
switching requirements rather than the rating of the transformers?
Click to expand...
On the other hand, step down transformers are available in many sizes.
Larger sizes cost considerably more than smaller ones. I would hope it is
fair to assume that the appliance used will not have a considerably lower VA
rating than the transformer.

Christian.
 
Also the Timeguard (or Smiths) RA010 433Mhz RF adapter
http://www.timeguard.co.uk/details.asp?product=141
I bought one in a bargain bin for Ł8
The device states 240v / 13a and sounds like it has relay switching.
The pdf claims 3kw heating / 300w filament lighting / 100w fan loads.
The website states other ratings. The helpline is 0208 450 0515

Toby.
 
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