DIN EN IEC 63522-18 VDE 0435-2027-18:2025-11

This part of IEC 63522, with functional and safety aspects, applies to electromechanical elementary relays (non-specified time all-or-nothing relays) with high capability requirements like breaking or short circuit capabilities and similar for incorporation into low-voltage equipment. These relays may have a specific design to extinguish the electric arc between contacts (e.g. by magnetic blow-out), or use an insulation coordination not covered by IEC 61810-1 (e.g. by gas filled contact chambers), or require safety assessments not covered by IEC 61810-1 (e.g. for higher loads).
It defines additional requirements for high-capacity relays with generic performance intended for use in applications in smart grids, electric vehicles and other applications where, for example, battery charge/discharge switching is used, such as:
- electrical energy storage (EES) systems,
- solar photovoltaic energy systems,
- electric road vehicles (EV) and electric industrial trucks,
- power electronic systems and equipment,
- secondary cells and batteries,
- road vehicles.
Compliance with the requirements of this standard is verified by the type tests indicated.