Intellectual Electronic Device (IED) NPT RPA

Functions:Relay protection (6-35 kV);Emergency automatics;Emergency events recorder;Automation and remote control. Advantages:3 devices in 1: multifunctional power meter, remote terminal unit, relay protection and emergency control terminal.Modular design: unit changeability (including «hot swap»), eased set of spare parts and accessories onsite.Malfunction diagnostic: diagnostic of units, control channels, communication channels, internal links etc.Up-to-date communication capabilities: communication protocols IEC 61850, IEC 610870-5-101/104, complete device integration.Reliable multiprocessor architecture: communication processor, input/output processor, algorithm processor. Тех. спецификации Detailed functions:Relay protection (6-35 kV);4-stage overcurrent protection (OCP) against phase-to-phase short circuit with current control in 2 or 3 phases; Automatic start of overcurrent protection stages acceleration is triggered by circuit-breaker;Current over-phase and unbalance protection;Phase-to-earth fault protection by higher harmonics sum;Phase-to-earth fault protection by current of nominal frequency;Built-in test of voltage circuits.Emergency automatics;Breakers control automation function (BCA).Single or double automatic reclosing.Automatic switching over to a reserve source with restoration service functions.Breaker failure protection. Circuit breaker open/close operations by external commands with multiple switching protection. External protections interface (ex.: arc protection)Implementation of external signals.Disturbance events recorder:Starting at specified conditions (VA, VB, VC, V1, V2, 3U0, IA, IB, IC, I1, I2, 3I0, f, discrete signals, etc), manual (program);Event logging.Relay protection and automatics (additional):Rapid and freely programmable logic (less than 5 ms per 1 iteration);Fast-speed functions for current, voltage and frequency;Remote internal configuration;Remote input and energy-independent storage of protection trip points and designed automatics configurations;Hold of outputs in case of device failure for exception of false firing.