That turns out not quite to be the case.
For a 3-phase supply,
kW = V x I x sqrt(3) / 1000
So 480V x 63A x 1.732 / 1000 =
52.377 kW
The Mennekes is 43kW if my AC theory is correct (times sqrt 3).
But the common or garden connectors like I linked to go further - there is a 125A variant.
Forgot about the 3 phase power factor. I looked it up and the Mennekes is rated at 43kW max (at 32A mode is 22kW). So it is comparable to TEPCO. The only difference is there is still the need for a step up transformer since three phase 400V sources are less common in the US and probably Japan (or the connector will have to handle twice the current if using 200V sources).
The TEPCO/CHAdeMO spec is:
Switching type, constant current power supply
# Input: 3-phase 200V (200~430V)
# Output power: 50 kW (10~100kW)
# Max DC output Voltage: 500V
# Output current: 125A (20~200A)
# JARI Level 3 DC Connector
# EV ECU determines optimal current; charger supplies current based on order from EV ECU
http://www.greencarcongress.com/2010/01/akerwade-20100115.html
The main difference between using AC and DC is with AC you need an onboard rectifier that can handle the power, vs offboard with DC. I don't know if there is any car demonstrated using the full power of the Mennekes connector, I can't seem to find one. There is also some difference in cable diameter given the trade-off between AC skin effect and 3 phase power.
I can't find if the Mennekes socket has support for DC charging on the same socket. It'll be ideal to have a socket that supports both DC and AC (I think J1772 was like this at some point, but they changed it, right now it is inadequate in terms of power output).
Originally Posted by
AndrewBissell
Future standards from the IEC offer options for the same connector to carry either multi hundred kW DC or 3-phase AC up to 690V, 250A - also multi hundred kW.
I can't seem to find if the IEC 62196 standard is talking specifically about the Mennekes connector or if it is talking about multiple types of connectors. For example, if the Mennekes connector can handle DC charging and the high currents/voltages mentioned (or is it just currently being confined by the cable).