The International Electrotechnical Commission (IEC) has released IEC TS 63053:2017 for “General requirements for residual current operated protective devices for DC system,” and is now available on the IEC webstore.
Description: “IEC TS 63053:2017(E) provides general minimum requirements, recommendations and information for the drafting and testing procedures of standards for residual current operated protective devices, intended to be used in DC systems having a rated voltage not exceeding 400 V DC and a rated current not exceeding 125 A, hereafter referred to as DC-RCDs.”
*Description from the IEC Website