electric house installation, CT set?

[xtrnuno41]

 

Im fixing my gf's electric house installation, as im flabbergasted (555) on how that's made

 

 

 

CT would stand for Connecticut Electric? So USA?

Hard to find anything about their RCBO, it looks electronic and is switchable in sensitivity, so it must be electronic. You can even set it to 6 mA.

So how would this be safe, as for instance with the moist in Thailand, the switch corrodes? 

It just looks like s sliding switch on a printboard, protected from moist? Im not sure, so it would mean fake protection, the value can change without knowing to a way higher value.

 

However CT is a supplier in Thailand for B-characteristic fuses, while all others, including a Siemens, deliver C-characteristics fuses, which means the C switches off later, thus more energy can be supplied in shortcut situations. Probably the standard in Asia is C.

B-characteristic switches off 3-5 X value fuse, a C-characteristics 5-10 X value.

So only if you have heavier equipment to feed with higher starting currents, you should use C. In household B is more then enough and saver then. 

 

Yesterday, in Thaiwatsadu i saw Haco is delivering a 40 A, 30 mA fixed RCBO and is dinrail mounted, same as the fuses CT can deliver and those are B characteristic, they are white with dinrail mounting, so guess go for that with an ABB box with din rail. The box is plastic, instead of some other boxes which are metal. The switch time of the Haco is 0.1 sec so is good. 

So get me an ABB plastic box , CT 16 A fuses and a Haco RCBO, all with dinrail

 

The system showed in the pic isnt a dinrail, so cant place the Haco, which has my preference over the "electronic" switchable RCBO, though that system has B-characteristic fuses. But the box is metal and the fuses are a mix. Just 1 or 2, depending on box size, is 16 A. The others are 10, 20, or 32 A, well all depends on how much power you consume, devices to run.

But then dont forget to check your wiring, is it in diameter big enough to carry the current?

 

Ofcourse you can, and i will (but not CT system, due to lack of my trust in the RCBO and the metal box), make your own box with the desired fuse sizes yourself, it will cost some more then? 

With CT system you can buy fuses separately, aswell the RCBO. You can even choose then 40, 50 or 63 A pass through current. A modulair system, sort of plug and play.

Again for normal house hold 40 is enough. Ok you have to built it up.

 

Or can anyone can tell me more about the CT  RCBO ?