Network and system protection with default basic programs for national standards and regulations
NEW: G99/1-4:2019
NEW: G98/1-4:2019
Island network detection df/dt (ROCOF) vector shift
Interface RS-485 (data exchange/parameter setting)
Continuous monitoring of the phase voltage and line-to-line voltage
Remote shutdown via ripple control signal receiver
The VMD460-NA is an external network and system protection (NS protection) the purpose of which is to disconnect the power generation system from the grid by coupling switches in the event of inadmissible threshold values. If voltage and frequency measurements on the power generation system are outside the thresholds required in the standards, the relays of the VMD460-NA will switch. The VMD460-NA is multifunctionally adjustable.
Single-fault tolerance
Monitoring of the connected coupling switch (configurable: NC/NO/off)
Islanding detection df/dt (ROCOF)
Vector shift
Interface RS-485 (data exchange, parameter setting)
Test function for the determination of the disconnection time
Test button for the trigger circuit