| Description de l'article | Voltage and frequency relay / the UFR1002IP mains decoupling relay monitors voltage and frequency in three-phase networks and complies with the conditions for central network and system protection in accordance with VDE-ar-n 4105:2018-11 for feeding into the low-voltage network. For feeding into the medium-voltage network in accordance with VDE-ar-n 4110:2018-11, the UFR1001E is suitable as unit protection at the generating units and as intermediate decoupling protection. The device has a dual-channel single fault safety design, thereby meeting the requirements of VDE-ar-n 4105:2018-11. The function of the connected switch is monitored. When monitoring is enabled, the device does not switch on again if a switch-off error is detected. Limit values for different applications are preset. They CAN be easily changed where permitted. If the rated voltage is changed, the device automatically ad |