Reliable Multifunctional Protection Relay Device

Series NST Microcomputer-based Integrated Protection and Measurement & Control Device is mainly applicable to comprehensive protection, automatic control, and measurement in neutral-point ungrounded systems or resistance-grounded systems with a voltage class of 35kV and below. With a high-performance industrial-grade microprocessor as its core, this device is equipped with a high-precision analog sampling module and multi-dimensional protection algorithms. It can achieve comprehensive protection functions including overcurrent, overvoltage, undervoltage, zero-sequence grounding, overload and voltage loss. Tailored to the characteristics of non-directly grounded neutral systems and resistance-grounded neutral systems, it optimizes the grounding fault detection algorithm, which enables rapid and accurate identification of concealed faults such as single-phase grounding, preventing fault escalation from affecting the entire distribution network. Meanwhile, the device is provided with…