IEC 61851-25-2020 pdf free.Electric vehicle conductive charging system – DC EV supply equipment where protection relies on electrical separation.
The DC EV supply equipment shall compare the DC output voltage with the values of the DCoutput voltage target parameter and the DC output voltage limit parameter received from theEV, and with the rated DC output voltage.
Shutdown conditions are in accordance with 6.3.10 if one of these values is exceeded.
Timing and tolerances that are applicable are indicated in Annex BB.
NOTE The values of the DC output voltage target parameter and the DC output voltage limit parameter are setbefore the beginning of the energy transfer.They can be modified during energy transfer.
6.3.5.5Monitoring of energy transfer requirements of the EV and adjustment of energy supply conditions.
A means shall be provided to continuously monitor the data transmitted by the EV and to adjustthe DC output current and/or DC output voltage and all associated parameters.
The DC EV supply equipment shall initiate an error shutdown if valid data is not received formore than 1 s. An energy transfer cycle can be reinitiated by the EV after such shutdown.
The DC EV supply equipment shall be able to deliver DC output power up to the rated DC output voltage and up to the rated DC output current within the limit of its rated DC output power atthe ambient temperature 0 C to 40 °C below 2 000 m above sea level. The DC EV supplyequipment shall not exceed its available DC output power, even if the power requested by the EV is higher than the available DC output power.Outside this operating range the DC EV supply equipment is allowed to reduce the power.
The EV supply equipment shall monitor the continuity of the control pilot circuit.The EV supplyequipment shall initiate an emergency shutdown on detection of interruption of the control pilotcircuit.Re-initialisation of the complete energy transfer procedure according to DD.3.5 shall berequired in order to restart the energy transfer cycle.
Compliance is checked in accordance with DD.3.5 and DD.3.8.6.
6.3.7Verification function before energy transfer
6.3.7.1General
The verification function is carried out when the vehicle connector has been fully inserted,latched and the control pilot circuit verified (see DD.3.5 and EE.1.2), and before energy issupplied to the Ev.
The DC output voltage of the DC EV supply equipment shall not be greater than +2 % of therated DC output voltage.
The DC EV supply equipment shall perform an error shutdown if the measured DC outputvoltage exceeds for more than 2 s the rated DC output voltage of the DC EV supply equipmentby 2 %,or the DC output voltage limit parameter sent by the EV by 1,5 V or 2 %, whichever isthe greater.
The DC EV supply equipment shall perform an emergency shutdown if the DC output voltageexceeds the DC output voltage limit parameter sent by the EV by 1 % for 1 s or exceeds 150 vfor more than 30 ms.
Compliance is checked in accordance with DD.3.7 and DD.3.8.
6.3.10De-energization of the power supply to the Ev6.3.10.1General
lf the signal status from the EV control energy transfer function no longer allows energization,the power supply to the EV shall be interrupted but the control pilot circuit may remain inoperation.IEC 61851-25 pdf download.