Ravinder,
Yes, been there, done that! (Kenmore 1980's Model).
Used a 2kVA xformer w/ US style outlet strip for microwave and other US kitchen
appliances. Only problem - Clock/Timer ran at 5/6 time so it was necessary to
enter 1:12 for every 1 minute of cook time! (Perhaps some up to date models
Although this is not a safety concern, the timer may have it's clock derived
from the powerline frequency. That would make the clock, and the timer
function, run slow on 50 Hz.
Regards,
Ed
Ed Price
ed.pr...@cubic.com
Electromagnetic Compatibility Lab
Cubic Defense Systems
San Diego, CA USA
Hi Ravinder,
I have read the other replies that advise to check the voltage and frequency
rating of the microwave's power supply. They also warn of the effects of
changing power frequencies.All good advice.
I have another concern to add.
Remember the recent thread about single phase,
Depends on your route to compliance.
If you used Annex IV, or you should consult your Notified Body. If
harmonised standards exist for your product and you self-declared in
accordance with Annex III, then I would say all you need to do is update
your Regulatory Technical File to include your new
Martin,
An article in Compliance Engineer, Jan/Feb 2001. Might shed some light on
this. See Article on page 36. Case Study: Building a Bridge Between Product
Safety and EMC.
Ron Duffy
-Original Message-
From: Allen, John [mailto:john.al...@uk.thalesgroup.com]
Sent: Monday, May 14,
Under what conditions/design changes does an intentional radiator need to
be resubmitted under the RTTE Directive?
In the U.S., resubmission is required for Class 2 changes (essentially
anything that changes the output such as changes in power, antenna,
frequency, modulation, etc.).
Is there a
They will deliver less powerabour 50/60 of what you expect.
The power supplies in those ovens are quite inexpensive and use a single
rectifying diode. When the voltage gets high enough, the microwave bursts
on for a short time. Thus, if operated from 50 Hz instead of 60 Hz, the
power will
-Original Message-
From: Doug McKean [mailto:dmck...@corp.auspex.com]
Sent: Friday, May 11, 2001 5:39 PM
To: emc-p...@ieee.org
Subject: Re: Voltage vs. Power
Ken Javor wrote:
I wasn't going to weigh in on this, but here goes. For residential
and
commercial non-industrial use,
Hi Ravinder:
I am interested in knowing if a 120V, 60Hz microwave oven can be safely
used on a 240V, 50Hz mains supply with a step-down transformer.
In essence, you are asking if a microwave oven
rated for 60 Hz will operate safely at 50 Hz.
I would guess that the microwave oven uses
If the frequency rating of the product is 50-60 Hz, it should be OK.
However, if the rating is only 60 Hz, there may be the following frequency
sensitive concerns:
* Lower output from transformers due to insufficient core size
* Slower speed fans causing cooling problems (if ac fans)
I am aware of China's requirements for safety and EMC approvals for imported
equipment, but I have no clue as to the requirements for products
manufactured in China. Can someone enlighten me, particularly about ITE and
power supplies?
Richard Woods
---
Hi,
I am interested in knowing if a 120V, 60Hz microwave oven can be safely
used on a 240V, 50Hz mains supply with a step-down transformer.
Regards, Ravinder
Email: ajm...@us.ibm.com
***
Always do right. This will gratify
Position Open - Product Safety Engineer
Nemko Dallas, TX is looking for engineers with a background in product
safety to join our team. Nemko Dallas is a subsidiary of Nemko AS, a
Notified and Competent body in the European Union. In Texas, we have a
full-service testing laboratory and
Joe,
On the domestic use front of 60950 ITE. What if a child were to unplug
say; a PC or Monitor from the wall and introduce the blades of the plug into
the mouth. Children put everything into their mouths.
Serge Bousquet
Safety Engineering Services Asia
-Original Message-
From:
Martin
Having read several other contributors comments on your question, I have to
say that I totally agree with them (test with the switch in both positions)
for one very practical reason.
I know of several occasions where personnel have lifted disconnected
equipment by wrapping their arms
Dear Patrick,
Thanks for your response. According to your explanation, no matter
compliant EN 60065 or IEC 60065 standard just cover the neutral part of
required standard and all require additional country deviation tests.
Do the Scandinavian countries traditionally accept VDE standard? If
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