[PSES] EN 50178 and EN 62477-1

Esteemed List Members, The CENELEC site indicates that EN 62477-1 was published in 2013 and intended to supersede EN 50178:1997: http://www.cenelec.eu/dyn/www/f?p=104:110:4766101042199869FSP_ORG_ID,FSP_PROJECT,FSP_LANG_ID:863,22817,25 However the list of harmonized standards under the LVD

Re: [PSES] New EMC Directive publication

Does anyone want to give the Cliffs Notes version of what's new in the Directives? Scott Aldous Compliance Manager/Engineering Lab Manager AE Solar Energy   +1.970.492.2065 Direct   +1.970.407.5872 Fax   +1.541.312.3832 Main scott.ald...@aei.com 1625 Sharp Point Drive Fort Collins, CO 80525

Re: [PSES] use of AC contactor in PV application in US/CAN

Clause 13.1 from UL 1741 and 690.17 from the 2011 NEC both require that disconnects consist of a manually operated switch or circuit breaker (this part of 2014 NEC has been modified). It may be a bit of a judgment call as to whether a contactor can meet the intent of these requirements. As

Re: [PSES] BS non-rewirable plugs

Unless the wall receptacle was wired backwards. ;) (One would hope this happens significantly less often in a medical facility than in a residence…) Scott Aldous Compliance Manager/Engineering Lab Manager AE Solar Energy +1.970.492.2065 Direct +1.970.407.5872 Fax +1.541.312.3832 Main

Re: [PSES] safety 60950 and surge suppression circuits

Throwing in my 2 cents: Hipot test values are based on expected transients. The concern with the transient overvoltages is that they could punch through insulation needed for safety and subsequently hazardous voltages can be allowed to reach areas where they should not. The function of an SPD

Re: [PSES] 3D passive glasses

If there is any product that children should not be playing with, it will be appealing... Scott Aldous Compliance Manager/Engineering Lab Manager AE Solar Energy   +1.970.492.2065 Direct   +1.970.407.5872 Fax   +1.541.312.3832 Main scott.ald...@aei.com 1625 Sharp Point Drive Fort Collins, CO

Re: [PSES] laptop - house fire

I don't believe it. Yes, a notebook computer will get hot with the vents blocked. Will it generate enough heat to ignite clothing it is resting on? I highly doubt it. According to this website: http://www.tcforensic.com.au/docs/article10.html Cotton ignites at 250 degrees C (for some reason

Re: [PSES] Immunity and emissions below 150 kHz and lithium batteries

Good information, Ted. There are also aftermarket batteries themselves, which the major manufacturers continually tell their customers not to use, for good reasons. Quality control at cell manufacturing facilities is very, very important. Scott Aldous Compliance Manager/Engineering Lab Manager

Re: [PSES] UL 1699B where art thou

UL1699B is published and available for purchase. You can search for it on www.comm-2000.com. Make sure you select UL Outlines when you search on it. Scott Aldous Compliance Engineer AE Solar Energy   +1.970.492.2065 Direct   +1.970.407.5872 Fax   +1.541.312.3832 Main scott.ald...@aei.com 1625

Re: [PSES] UL 1699B where art thou

or to STP members. this outline just sits there, the computer screen that glares. it mocks me, it taunts me. my eyes squint into the far-away, pixels for beads of darkness, that is this outline. and yet, I wait. I will wait for the standard. Brian -Original Message- From: Aldous

Re: [PSES] Product safety requirements

You would need to make sure that the output of the power supply is a Limited Power Source in order to deal with fire hazards. The nameplate output ratings are necessary but insufficient information to determine if a fire hazard may be present. Also, it is possible that your regulators (maybe

Re: [PSES] HAR cable designation question

Hi Peter, Regarding the voltage ratings, according to a handwritten note I made on a printout from Oflex on my cube wall, the first number refers to the conductor to ground voltage rating and the second number refers to the conductor to conductor voltage rating for multiconductor cable. I

Re: [PSES] HAR cable designation question

www.advanced-energy.com/solarenergy -Original Message- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Aldous, Scott Sent: Thursday, October 11, 2012 9:33 AM To: Peter Tarver; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: HAR cable designation question Hi Peter, Regarding

Re: [PSES] Insulative barriers deposited on metal surfaces

I agree with Joe's comments as well. It is typically very difficult if not impossible to demonstrate the 2 items that Joe mentions below, the only exception being if you can find a material that has a third party (UL) certification that covers the application process as well. Personally, I've

Re: [PSES] IEC 61010-1:2010 section 5.4.4

Hi Doug, 60950-1 generally assumes use in an office environment. I don't believe the standard covers requirements for exposure to liquids where a hazard could result. If an OTS computer is used in a lab system where exposure to liquids may occur, the certification of the computer won't cover

Re: [PSES] UL1741 - IEC62109-1

Hi Brian, If I recall correctly, there was an action item to try to coordinate with CSA, but I don't know where that stands. I doubt that any version of IEC 62109-1, even with Canadian differences, could completely replace CSA 107.1 since it is a fairly general standard not limited to

Re: [PSES] Interview Questions

Bolivia has a 50Hz grid, but some parts of the country operate at 110V while other parts operate at 220V. There is some mixing of the 2 voltages in some areas. I was in a room in La Paz where one side of the room was 110V and the other side was 220V, with the same type of receptacles and no

Re: [PSES] Interview Questions

@LISTSERV.IEEE.ORG Date: 07/05/2012 09:02 AM Subject: Re: [PSES] Interview Questions Auto-ranging rules! :) (or else the insurance company!) -Original Message- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Aldous, Scott Sent: 05 July

Re: [PSES] Interview Questions

I believe Nick may be fishing for the answer - a voltage selector switch. Back to the original question... Of course, an interview is much better for assessing this type of knowledge, but if you have to have questions on an application where candidates fill it out from home, you could ask

Re: [PSES] Interview Questions

PM To: Aldous, Scott Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: Interview Questions Hi Scott, That's not always the case. I've had experience with auto-ranging 120/240V products where no voltage selector switch was needed. Best regards, Ron From: Aldous, Scott [mailto:scott.ald...@aei.com

Re: [PSES] e-standard.org The cheapest standards in the world

As for UL at least, I would imagine that their not-for-profit status, which is largely justified by their activities in creating and maintaining standards, goes a long way in paying for those activities through the tax breaks. Scott Aldous Compliance Engineer AE Solar Energy   +1.970.492.2065

Re: [PSES] Circuit breakers in Europe

Bussmann has an excellent resource titled Fuseology that I would highly recommend. I seem to recall you used to be able to download the whole thing as a .pdf. Now, it seems it is broken up into sections but I believe it is still on the Cooper Bussmann website if you look persistently enough.

Re: [PSES] Mains voltage in Europe

ANSI C84.1 has requirements for voltages in the USA. http://www.powerqualityworld.com/2011/04/ansi-c84-1-voltage-ratings-60-hertz.html Scott Aldous Compliance Engineer AE Solar Energy   +1.970.492.2065 Direct   +1.970.407.5872 Fax   +1.541.312.3832 Main scott.ald...@aei.com 1625 Sharp Point

Re: [PSES] Is this common knowledge - Electrical Ratings

Hi Kevin, The 120-240V product is auto-ranging and can use either voltage with no special action required. The 120/240V product will have a voltage selector switch. I do believe this is common knowledge, at least among product safety engineers. ;) Scott Aldous Compliance Engineer AE Solar

Re: [PSES] new std - UL2747

At first glance, I would guess that this is intended to cover the DC-DC converter that an EV would need to provide power to electrical systems such as headlights, turn signals, heater fan, etc. I'm puzzled by the rating in the scope of up to 250Vac at 50/60Hz though. Scott Aldous Compliance

Re: [PSES] Thermal Protection of Lithium Ion Batteries

That's a very good question, especially considering that lithium ion batteries are making their way into electric vehicles: http://spectrum.ieee.org/green-tech/advanced-cars/lithium-batteries-for-hybrid-cars The potential safety issue seems to be downplayed by the last paragraph in the

Re: [PSES] Thermal Protection of Lithium Ion Batteries

http://blogs.scientificamerican.com/observations/2011/11/29/could-chevy-volt-lithium-ion-battery-fires-burn-out-interest-in-evs-and-hybrids/ These conditions were certainly quite abnormal, but it is interesting that the fires were not initiated immediately following the crash tests. Scott

Re: [PSES] Steady State Conditions

There is a guideline in EN 60335-2-6, the part 2 for stationary cooking ranges, ovens, hobs and similar appliances. Note 101 under 11.7 indicates: Steady conditions are considered to be established if the temperature does not rise by more than 1 K in 15 min. I don't know if it's intended to be

Re: [PSES] Orgalime: UL an effective barrier to trade

In all fairness to Orgalime, the answer that Rich gives doesn't really provide a practical solution for component manufacturers. As long as all the agencies accept UL certification of components as valid and UL is reluctant to accept component certifications from other agencies, this will

RE: Safety Experts: Limited Voltage Pwr Supplies vs. Non-Limited Voltage Power Supplies

Hi Christine, IEC/UL/EN 60950-1 refers to LPS as a Limited Power Source, and is described in clause 2.5 of that standard. It encompasses a limitation on voltage, but also includes limiting of current and power as well. There are requirements in the standard that no longer need to be applied

RE: What's the deal with Wire Nuts?

Hi Brian, When I worked for UL, I had heard that the use of wire nuts was not acceptable for the EU (CE Marking), but I don’t recall ever seeing the source of this alleged requirement. I have a vague recollection about them not having any type of international certifications, but I’m not sure

RE: C-tick approvals

Hi Michael, There are agents both in Australia and New Zealand that you can use for this. They would then issue the declaration, and hold the compliance folder, and you could mark your product with the C-Tick together with the agent’s supplier code. They will charge you an up front fee, and an

RE: mobile phone safety

http://tech.yahoo.com/blogs/null/94863 Scott Aldous Compliance Engineer Advanced Energy Tel: 970-407-6872 Fax: 970-407-5872 From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Benoit Nadeau Sent: Wednesday, June 18, 2008 8:08 AM To: 'Pettit,

RE: Chassis mount PS UL considerations

Hi Alex, FYI, there is a UL PAG (Practical Application Guideline) related to the acceptability of the use of knurled thumbscrews, assuming the ITE standard for safety (UL 60950-1) is applicable to your product. A subscription is required to access the PAGs, but if you're going to be working with

RE: UL60950 vs. IEC 60950

The UL standard will highlight differences from the base (IEC) standard. The EN standard will also highlight differences from the base (IEC) standard. Another thing you could do is get the latest CB bulletin for OFF from the IECEE, which will list published national and group differences. You

RE: Safety regulations

Curt writes: To phrase this another way: someone else's label (the power supply manufacturer) is not a valid indicator that a product has a safety approval. If I understand the original question correctly, this is what it really comes down to. The power supply may be Listed by itself, but