Residual current circuit breaker

[hisham1986]

Dear All,

knowing that Shneider Acti9,Ild RCCB rated 63 Amps trips due to an earth leakage kindly i need to know does it trip also due an overload (Above 63 amps load) and a short circuit just like a normal circuit breaker too?

Best regards and thank you in advance,

 

[Jraef]

Dear All,

knowing that Shneider Acti9,Ild RCCB rated 63 Amps trips due to an earth leakage kindly i need to know does it trip also due an overload (Above 63 amps load) and a short circuit just like a normal circuit breaker too?

Best regards and thank you in advance,

You are posting in a primarliy North American forum, so those terms don't mean much to most of the people here.

An RCCB does NOT have anything but the Residual Current trip sensing circuit. If you want that PLUS the other normal functions of an MCB, you need to use an RCBO.

At least that's how I understood it when I worked for Siemens. Maybe someone from the UK or somewhere else can confirm or refute that.

 

[templdl]

Dear All,

knowing that Shneider Acti9,Ild RCCB rated 63 Amps trips due to an earth leakage kindly i need to know does it trip also due an overload (Above 63 amps load) and a short circuit just like a normal circuit breaker too?

Best regards and thank you in advance,

If your breaker just has a thermal an magnetic element the thermal element responds to heat. If the breaker trips while you present should the breaker have trapped due to an overload after tripping it will need to cool a bit d before you are able to latch to back to off (open) position to reset and then close to the on position.
If it tripped due to a short circuit magnetically (instantaneously) you will be able to relatch the breaker in the open position closed.
As such you should be able to tell who the breaker tripped if you are able to be present at the to e that the breaker tripped.
But please be advise the it is never wise to reclose a breaker back into a short circuit or a fault.

 

[GoldDigger]

If your breaker just has a thermal an magnetic element the thermal element responds to heat. If the breaker trips while you present should the breaker have trapped due to an overload after tripping it will need to cool a bit d before you are able to latch to back to off (open) position to reset and then close to the on position.
If it tripped due to a short circuit magnetically (instantaneously) you will be able to relatch the breaker in the open position closed.
As such you should be able to tell who the breaker tripped if you are able to be present at the to e that the breaker tripped.
But please be advise the it is never wise to reclose a breaker back into a short circuit or a fault.

Good advice for other situations, but as Jraef said the RCCB (Breaker) unit simply does not contain any overload or short circuit tripping. The Amp value associated with it simply indicates the maximum current it can handle before either overheating or losing residual current sensitivity. Take a look at RCCB versus RCBO (with overload) in the online catalog and you will see the large difference in form factor.

 

[templdl]

Good advice for other situations, but as Jraef said the RCCB (Breaker) unit simply does not contain any overload or short circuit tripping. The Amp value associated with it simply indicates the maximum current it can handle before either overheating or losing residual current sensitivity. Take a look at RCCB versus RCBO (with overload) in the online catalog and you will see the large difference in form factor.

Then it is a supplementary protector with a mag only element UL1077 UL Recognized device.

 

[Jraef]

Then it is a supplementary protector with a mag only element UL1077 UL Recognized device.

No, a UL1077 listed supplementary protector still has to have trip sensors in it, an RCCB has nothing but a Residual Current Ground Fault trip system. There is no UL category or equivalent for RCCBs, hence they cannot be used here. The closest we have would be a receptable style GFCI, but in MCB (Mini Circuit Breaker) form factor and NOT Class A. It's closer to our Class B, because Class B is 20ma or more, and a typical RCCB is 30, 60 or 100ma depending on what you buy. For us here in the US it would be only for Equipment Ground Fault, sometimes called an Arcing Ground fault protective device, but not to be confused with an Arc Fault breaker.

The OP is not in the US and there are very confusing differences in this issue, that's why I pointed out to him that he needs help from people more familiar with the IEC terminology.

 

[templdl]

No, a UL1077 listed supplementary protector still has to have trip sensors in it, an RCCB has nothing but a Residual Current Ground Fault trip system. There is no UL category or equivalent for RCCBs, hence they cannot be used here. The closest we have would be a receptable style GFCI, but in MCB (Mini Circuit Breaker) form factor and NOT Class A. It's closer to our Class B, because Class B is 20ma or more, and a typical RCCB is 30, 60 or 100ma depending on what you buy. For us here in the US it would be only for Equipment Ground Fault, sometimes called an Arcing Ground fault protective device, but not to be confused with an Arc Fault breaker.

The OP is not in the US and there are very confusing differences in this issue, that's why I pointed out to him that he needs help from people more familiar with the IEC terminology.

One would like to think that a simple answer that could have been given to answer the OP with as 'no' being that the device only has earth leakage protection.