IEC60870-5-7 Communication protocol standard

IEC TS 60870-5-7:2025 is a technical specification under the IEC 60870-5 telecontrol protocol series, defining security extension mechanisms for IEC 60870-5-101 and IEC 60870-5-104 telecontrol protocols by adopting IEC 62351 security framework. It specifies secure message structures, authentication algorithms and data integrity verification methods for power system remote communication. This standard enables receiving devices to verify the identity of message senders and confirm that protocol data units remain unaltered during transmission, defending against tampering and unauthorized access in distribution automation communication. Relevant certification documents include Protocol Conformance Test Certificate No. PTC-2025-05213, Witness Security Test Report No. WST-2025-10047, Routine Validation Report No. RV-2025 series, all issued by CNAS accredited independent test laboratory and available for tender submission, utility review and project site acceptance. It is widely adopted for securing communication between protection relays, recloser controllers and SCADA master stations in medium and high voltage power grids.