This problem's not at the wall box EVSE itself. It's inside the mini Consumer-Unit that's wired off the Grid-meter, on the other side of the gge. EVSE & Car stuff is fine thx.is the lead definitely all the way in at the wall box? Try pushing it in a bit futher.
I had something similar with my first charge, turned out the lead has a snugger fit than I was used to with my old leaf.
My Rolec EVSE installed in late 2017 has a C40 RCBO fitted from new:"Application exampleThree MCBs are to be installed side by side inside an enclosure. The ambient temperature inside the enclosure is at 40°C. The required maximum load current drawn per MCB = 29A.Determine whether 32A MCB would provide suitable solution.• From the Temperature Derating table, The nominal trip current (In) of 32A MCB operatingat 40°C is derated to 30.4A• From the Grouping Factor table, Three MCBs installed side by side have a groupingfactor K(g) = 0.95• Combined effect of temperature derating & grouping factor, 30.4 x 0.95 = 28.88AIn this application the 32A MCB would trip at 28.88A and therefore be unsuitable to supplythe max 32A load that is required. In this case a 40A or higher MCB should be selected instead."
The OP has stated that it is the LH MCB tripping!From memory a B type MCB will hold 32A forever. As others have said, it‘s the RCD, not the overcurrent device that’s tripping. RCDs work by measuring the current flowing in to the circuit (along the live leg) and the current flowing out of the circuit (along the neutral leg). It should be the same (residual current = 0). If there is a leakage path to earth, some of the return current will flow through that back to either the PME connection at your meter or direct to the substation, bypassing the RCD and leading to a measurable residual current.
If the difference between the current out and current back exceeds 30mA (the 0,03A marking in the picture) then the unit will trip.
Not immediately obvious to me why it trips after so long or only at higher current.
The leaf only draws 27.5A max while charging that breaker is only loaded to to around 85% of its rating.No false trips charging my Leaf at 6.6kW.
I think you missed the entire point of my post - which is that the RCBO in my Rolec is 40 amp not 32...obviously done for a reason.The leaf only draws 27.5A max while charging that breaker is only loaded to to around 85% of its rating.
I expect my RCBO to last a long time.
My charging circuit has a 32A breaker on it, if I change up from the leaf to a car that had a bigger charger on board I would fit a 40 breaker and make sure it was on a 10mm cable to the charge point.
You shouldn’t need to. B curve shows disconnection time at 40A is 1,000 seconds (ie 16 minutes) Curve doesn’t even show a time for 31A.if I change up from the leaf to a car that had a bigger charger on board I would fit a 40 breaker and make sure it was on a 10mm cable to the charge point.
That's normal. The bimetal bit is in there being slow-cooked, as it should be running near max current.Charging at 31.5A, it's getting up to 43C about half-way up, so looks like internal heating somewhere in the middle.
Domestic installations are recommended to be checked every 10 years, but of course people don't bother even if they actually think about it.I do wonder if there needs to be some sort of regular inspection required for these EV setups
Probably more accurate than the assumption that the supply is 230v, although if the monitor is measuring current and assuming the line voltage then your calculation back to current is correct.BTW according to my Loop monitor the Leaf actually draws 6900 watts - at 230v that's 30 amps not 27.5A. Not sure how accurate the loop is though.
The mains voltage at the house varies from 230v to 235v. I've only seen it get to or go over 240v once during the beast from the east.Probably more accurate than the assumption that the supply is 230v, although if the monitor is measuring current and assuming the line voltage then your calculation back to current is correct.
DNOs didn’t generally reduce the voltage when the nominal value was harmonised so it’s probably closer to the original 240 nominal.
BTW according to my Loop monitor the Leaf actually draws 6900 watts - at 230v that's 30 amps not 27.5A. Not sure how accurate the loop is though.
This is true, but provides greater headroom on the trip so as it gets old your much less likely to wake up in the morning and realise you’re car didn’t charge last night due to an old breaker, so you have a 20min detour to the local rapid on your way to work this morning! 😂Overrating circuits just lengthens the fault clearance time.
Mine is regularly 245v. I only live a couple of hundred yards from the substation but that still looks like 240 nominal.The mains voltage at the house varies from 230v to 235v. I've only seen it get to or go over 240v once during the beast from the east.
It’s a portable 32A commando charger from EV one stop.That’s a smart looking charger. What is it?