61851-1 compatibility question

[widodh]

If EVSEs do this then they are breaking the standard. They become useless for most current EVs.

True, but it might be reality.

EV-Box told me (like I mentioned) that they install a C16 AND C32 fuse in a 32A EVSE, since technically the possibility exists that due to a malfunction somewhere the EV starts drawing 32A over a 16A cable without tripping a fuse. That could lead to dangerous situations.

It is however to bad, since an EVSE can increment from 16A to 32A in steps of 4(?) Amps.

[Kevin Sharpe]

They become useless for most current EVs.

agreed... it makes no sense to me

[dpeilow]

Maybe changing the pilot signal on the fly is too complex for these poor vendors...

Care to name and shame?


Bottom line is that buying a 16A cable seem to be a false economy. I had that opinion anyway.

[Kevin Sharpe]

EV-Box told me (like I mentioned) that they install a C16 AND C32 fuse in a 32A EVSE, since technically the possibility exists that due to a malfunction somewhere the EV starts drawing 32A over a 16A cable without tripping a fuse.

What's interesting about this is that IEC 61851-1{ed2.0} has four resistor codings for 13A, 20A, 32A, and 63A (3 Phase)/70A (1 Phase) which implies that a 16A cable would be protected by a 16A fuse but would only charge at 13A....