Grid protection and NA protection per VDE-AR-N 4105
Grid and plant protection devices monitor voltage, frequency, phase sequence and dynamic grid events such as ROCOF and vector shift. They are mandatory for distributed generation systems above 30 kVA feed-in power, including PV systems, battery storage, CHP and wind turbines. The CEL-NA-S is designed as a compact DIN-rail device with three changeover contacts, digital inputs and optional Modbus RTU communication. Configuration is done via the front panel or software. The CEL-NA-S meets VDE-AR-N 4105 and VDE-AR-N 4110 requirements for connection to low- and medium-voltage grids.