TheABB RET670 (1MRK002246-BD)is a high-performance Intelligent Electronic Device (IED) from the Relion® 670 series, specifically engineered for the high-speed protection and control of power transformers and shunt reactors.
Detailed Technical Specifications
TheABB 1MRK002246-BDprovides the following industrial-grade capabilities:
Protection Scope:Comprehensive protection for all types of power transformers, autotransformers, and shunt reactors.
Differential Functionality:Capable of hosting two independent differential protection functions within a single IED for advanced multi-winding schemes.
CT Requirements:Extremely low requirements on main CTs; eliminates the need for interposing CTs through software-based compensation.
Frequency Range:Wide-band operational tracking to ensure accuracy during system frequency shifts (start-up/shutdown).
Control Features:Integrated local and remote apparatus control for switchgear on all sides of the transformer.
Safety Logic:Station-wide and bay-level interlocking to prevent hazardous switching operations.
Communication:Native IEC 61850 implementation for seamless, future-proof substation integration.
Configuration Type:Customized variant (1MRK002246-BD) allowing for full logic and I/O adaptability.
Platform:Part of the Hitachi Energy / ABB Relion® 670 product family.
Advanced Protection & Secure Control Logic
TheRET670 1MRK002246-BDaddresses the critical need for both sensitivity and stability. Its differential protection algorithms are exceptionally fast, yet they remain immune to magnetizing inrush and over-excitation through sophisticated harmonic restraint. Beyond protection, this IED acts as a bay controller, managing the status and operation of circuit breakers and disconnectors. The integrated interlocking system ensures that personnel safety and equipment integrity are prioritized by verifying all electrical conditions before allowing a switchgear operation to proceed.
