IEC 60364-7-722 – Requirements for special installations or locations – Supplies for electric vehicles

As of June 2019, the new IEC 60364-7-722 standard is mandatory for planning and installing surge protection solutions for connection points which are accessible to the public.

722.443 Protection against transient overvoltages of atmospheric origin or due to switching
722.443.4 Overvoltage control

A connecting point accessible to the public is considered to be part of a public facility and must therefore be protected against transient overvoltages. As before, surge protective devices are still selected and installed according to IEC 60364-4-44, clause 443 and IEC 60364-5-53, clause 534.

VDE-AR-N 4100 - Basic rules for connecting customer installations to the low-voltage system

In Germany, VDE-AR-N-4100 must be additionally observed for charging posts which are directly connected to the low-voltage system.

VDE-AR-N-4100 describes, amongst others, additional requirements on type 1 arresters used in the main power supply system, for example:

• Type 1 SPDs must comply with the DIN EN 61643 11 (VDE 0675 6 11) product standard
• Only voltage-switching type 1 SPDs (with spark gap) may be used. SPDs with one or more varistors or parallel connection of a spark gap and a varistor are prohibited.
• Type 1 SPDs must not cause operating current resulting from status displays, e.g. LEDs