Apologies if this is an old problem.
So I’ve had a Gen 3 wall connector fitted with a matt:e unit.
All good except when there is some load on the house the incoming voltage is pulled down from about 220v to about 212v. Consequently the Matt e unit trips on low voltage as it thinks there is a neutral fault, my house is on a T N CS earthing system. The unit trips even without the car charging.
I contacted UKPN who came out the same night to have a look at the low voltage situation.
Today they have dug up the front garden and swapped my cable to another less loaded phase in the street and changed my incoming cable. All credit to their quick action.
This made a bit of difference but the Matt:e unit still trips even if I reduce the charging current to about 10A.
I will try to do a low current charge tonight when all gone to bed, but don’t hold out much hope.
UKPN say they will see if they can tap up the local transformer voltage.
Real question is, if the network can’t maintain the voltage what options are there for a charger installation.
I’ve heard an separate Earth system with a low resistance Earth rod could be used.
Charging at anything like 30A seems like a fantasy at the moment.
Any advice or expearience greatly received.
Thanks
So I’ve had a Gen 3 wall connector fitted with a matt:e unit.
All good except when there is some load on the house the incoming voltage is pulled down from about 220v to about 212v. Consequently the Matt e unit trips on low voltage as it thinks there is a neutral fault, my house is on a T N CS earthing system. The unit trips even without the car charging.
I contacted UKPN who came out the same night to have a look at the low voltage situation.
Today they have dug up the front garden and swapped my cable to another less loaded phase in the street and changed my incoming cable. All credit to their quick action.
This made a bit of difference but the Matt:e unit still trips even if I reduce the charging current to about 10A.
I will try to do a low current charge tonight when all gone to bed, but don’t hold out much hope.
UKPN say they will see if they can tap up the local transformer voltage.
Real question is, if the network can’t maintain the voltage what options are there for a charger installation.
I’ve heard an separate Earth system with a low resistance Earth rod could be used.
Charging at anything like 30A seems like a fantasy at the moment.
Any advice or expearience greatly received.
Thanks
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