Interesting video on testing type "A"'s RCBO and issues with MFT 's

[LukeD]

 

[loz2754]

Watched it yesterday.
The main thing they were plugging was that BS7671 tables for testing RCDs only apply to type AC RCDs. Therefore, the ECA chap was recommending that we test all RCDs on the type AC setting on our test equipment, regardless of the type of RCD under test.

Then the Lewden technical chap added that, for a type A, we should test first on the AC setting, then test again on the A setting. The results we record would be the results from the type AC, as this is what BS7671 is asking for on the schedule of year results.

Interesting discussion indeed.

They also touched on where in the circuit we should be testing RCDs....

 

[Mikegh]

I'll watch when I get a chance

Interested to go through it all in detail

 

[GBDamo]

I've watched this twice now and it is a bit of a WTF moment.

It looks like everyone is looking at each other to figure out how the hell we ended up in this mess.

Manufacturer is getting massive returns as the devices are "failing" their answer is they're not failing by the specs that we use but don't publish.

MFT maker just looking blank.

The ECA chap made most sense with his "just test AC type as its the only test we have published targets to test against"

More comedy from the electrical industry.

 

[buzzlightyear]

It was watching what came first the dinosaur or the chicken, WTF every body was pluxed.

 

[Mikegh]

I've watched this twice now and it is a bit of a WTF moment.

It looks like everyone is looking at each other to figure out how the hell we ended up in this mess.

Manufacturer is getting massive returns as the devices are "failing" their answer is they're not failing by the specs that we use but don't publish.

MFT maker just looking blank.

The ECA chap made most sense with his "just test AC type as its the only test we have published targets to test against"

More comedy from the electrical industry.

Well I'm not surprised to hear this

I reckon there's definitely a knowledge gap to be filled in regard to testing of A and B type

Thankfully we don't series the RCDs over here which complicates matters a little further


Now maybe everyone is fully up to speed but I could see where I was mistaken a few minutes into the video

 

[SparkySy]

What gets me is that megger are basically selling a lie and their tester can't properly test the type A B or F properly as it doesn't meet the manufacturer standard for testing them but does meet their standard for testing them wtf!
And that the manufacturer doesn't want to give up their standard information as they have probably paid a fortune to acquire it so they can make things to those standards.
That has really made my brain hurt!

 

[buzzlightyear]

What gets me is that megger are basically selling a lie and their tester can't properly test the type A B or F properly as it doesn't meet the manufacturer standard for testing them but does meet their standard for testing them wtf!

Megger are supposed to be top brand, me if I worked there I would start throwing the testers out the window and starting again.

 

[LukeD]

Megger are supposed to be top brand, me if I worked there I would start throwing the testers out the window and starting again.

No one is talking to each other in the industry to ensure things are rolled out properly

 

[GBDamo]

What gets me is that megger are basically selling a lie and their tester can't properly test the type A B or F properly as it doesn't meet the manufacturer standard for testing them but does meet their standard for testing them wtf!
And that the manufacturer doesn't want to give up their standard information as they have probably paid a fortune to acquire it so they can make things to those standards.
That has really made my brain hurt!

I think the tester works it's just that there is nothing to relate the results to as that I the manufacturer's proprietary information and, for all we know they may well al be different.