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Hlc_4
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Message 1 of 11
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Superhub causing RCD to trip

Hi, my superhub is causing my electricity to keep tripping - would anyone be able to tell me if this is because the hub may be faulty or is it to do with my circuit? Many Thanks!
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av-115
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Message 2 of 11
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Re: Superhub causing RCD to trip

Have you definitely isolated the cause of the RCD trip to the Superhub? If so I'd guess it's a faulty DC adapter and to be honest I'd ring Virgin and just ask them to change both the hub and adapter. They may wish to send an engineer to check everything, but if the hub has been in situ for a while without causing problems I doubt it's your circuit.

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Hlc_4
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Message 3 of 11
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Re: Superhub causing RCD to trip

That's great thanks. I've definitely isolated it to the hub. It's been working fine for 4 months which made me wonder if something is wrong with it. I'll contact Virgin and take it from there. Thanks again.
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g0hjq
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Message 4 of 11
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Re: Superhub causing RCD to trip

In that case I would be very careful.

tts possible that there a high leakage current from the mains input to the output of your power supply, in which case the output jack could have a dangerous voltage if you disconnect it from your router.

Alternatively, it could just be that your RCD is over sensitive. Does anything else trip it?


Hlc_4 wrote:
That's great thanks. I've definitely isolated it to the hub. It's been working fine for 4 months which made me wonder if something is wrong with it. I'll contact Virgin and take it from there. Thanks again.

 

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Tudor
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Message 5 of 11
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Re: Superhub causing RCD to trip

RCDs these days are very reliable and as it's probably a 30ma trip it would be tripping correctly. Essentially they measure the differential between live and neutral which leaks to earth. RCDs are very good, but unless you have a split box with two of them, when they trip they take out the whole house. I prefer RCBOs and have 10 in my house protecting all circuits, so if one bit of equipment trips the RCBO it only takes out one circuit, say downstairs ring main. All my computer equipment is on one RCBO.


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Forum Team
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Message 6 of 11
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Re: Superhub causing RCD to trip

Hi there Hlc_4,

 

Sorry to hear about this. :/

 

I've located your account and there does appear to be some power issues present via the equipment levels.

 

I've sent you a private message so that we can discuss potentially arranging an engineer visit for this.

 

Speak soon,

 

Nat_J


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Tudor
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Message 7 of 11
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Re: Superhub causing RCD to trip

The N neutral line in AC mains is effectively earth. I know it seems strange but if you look at the HT pylons you will see mostly 7 wires, one small one at the top which is tied to earth and 3 on each side, these are two lots of three 3 phase connections. So where is the neutral line? There isn't one it's not needed. 


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Superuser
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Message 8 of 11
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Re: Superhub causing RCD to trip

Just a thought in addition to the above excellent advice.

Is the HUB plugged into a power strip?

Ive had a power strip go bad whereby anything plugged into one of the sockets caused the RCB to trip.

 


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Magic_M
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Message 9 of 11
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Re: Superhub causing RCD to trip


Clint_Flick wrote:

My point is that there is no return path (it is a plastic pin from a plastic case) other than the neutral, so an out of balance cannot occur.


However... it is very common for antenna screening to be connected to the 0v rail in equipment. It is also usual for screening to be connected to earth in earthed equipment. If isolation has failed this can provide quite a low impedance earth path.

It's rare but not impossible.

-

It'd be interesting to know if the OP has got it solved. 

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IKbrunel
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Message 10 of 11
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Re: Superhub causing RCD to trip

Is the screen on VM co-ax cable at earth potential?
Is there any isolation provided in the internal connecting box/socket?


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