Relay switch 2x1,5kw - Lights not turning off.

[Mib 15]

Thank you petergebruers! No I got an idea what is going on.

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Now we have to go into the details.

I use for all of the above mentioned rooms this LED called "Nimbus"

LED 8W/24V DC, IP20, EEK= A+ 3000K° 546lm breitabstrahlend with 24V Konverter 12W dm=55mm h=24mm

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In the hall I use seven LEDs with 6W operated by a motion sensor.

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I never had probs with welding relays in the hall. And these LEDs are on and off whole day long since August 2015.

Bathroom (upper floor) and restroom (ground floor) are both equipped with "Nimbus" and have the same frequency in turning lights on and off.

I never had a welding problem in the bathroom.

MIB

[wospital 2]

hello everyone,

it's a weak or 2 ago.

i combined the electronica that whas selected by

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untill now it works perfectly ( i am happy with it )

i had 3 circuits that had that problem.

 

i also tested with the conrad Osram led lights they are also working fine.

 

thanks for you help and tech view.

i realy appreciat it

Greets from belgium

[marshal 2]

Hello,

I had this problem too with Chinese brand  LED's, but with installing an NTC in series with the load the problem solved perfectly!! 

[smarthome776 0]

On 1/8/2016 at 5:36 PM, petergebruers said:

Sorry for the delay, I've had a busy week. First, I'd make certain that it is indeed a "stuck relay". See my post #4. Since you've had the same issue with a different Fibaro module, this is very likely your problem, but you never know. There are different ways of solving this, depending on a number of factors.

- Adding a second relay type "din mount" and screw terminals. This is something you can do yourself if you know how to work safely with mains voltage. The trouble is the size of the relay. It's much bigger than a module. The "in" has to connect to the "out" of the FGS and the contact of the relay connects to your light circuit. But where do you put the relay? A dropped ceiling might work...

- Adding a second relay with PCB terminals. This relay is much smaller, about the size of a Fibaro module. But that's probably still not small enough to fit in the same space as the Fibaro Relay. You need to solder wires and you'd want to use heat shrink tubing. So this is definitely not for everyone. You need the tools and the skills.

- Putting a passive component called an "NTC" of a certain specification in series with the load. It's a kind of resistor, disc shaped roughly 10-15 mm diameter and a few mm thick. But... this is even more difficult to use than the relay(s). You need to solder wires to this component and make sure it does not touch anything. In fact, it should have about 1 cm of air around it to function properly. If you get it right, it's the smallest possible solution. It's also very reliable. This is the solution I'm using, but I am an Electrical Engineer and I have the tools.

- Replace the load. I can't guarantee success, but I've established 2 years ago that some no-brand LED make these relay stick, because they can cause a high inrush current. When I tested a few OSRAM and Philips bulbs, I saw a much reduced inrush current (one fifth ff the current of the "bad ones"). So I expect these to be OK. Unfortunately, there are so many brands & models and it changes all so fast that I cannot recommend a certain type. Maybe another forum member can help you with this... I say this for completeness.

- And finally, maybe something stupid... If you don't really need a double relay... try the "single" 3 kW version. It's not guaranteed to work, but it does come with a bigger relay.

If you tell me what's possible for you, I can help you with the details.

Dear !

What model NTC are you use ? 

can you send me Model , Image to my email : [email protected] 

thanks verrymuch

[petergebruers 1,268]

See link in this post:

 

 

 

[wospital 2]

these are the products that i used

 

Epcos B57237-S220-M NTC-thermistor S237 22 Ω 
Zekeringhouder Geschiktvoor Buiszekering 5 x 20 mm 5 A 250 V/AC

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you have to put it in serie between. and that it's stolved 

it stil works today so it is a great solution.

thanks to the inventor that replayed on my first post  many thanks.