The RP 9810 voltage and frequency monitor monitors the network operator's network for self-generating systems. It has a two-channel design, with each channel acting on a separate output relay. The voltage and frequency limit values are set using rotary switches, which are preset in accordance with the specifications of VDE-AR-N 4105 when delivered. The limit value for voltage drop protection is fixed at 80% UN. After the self-generating system has been put into operation, the settings can be sealed using the crystal-clear front cover. Exceeding or falling below a limit value leads to the self-generating system being switched off and disconnected from the network. The generation system is only connected to the network or automatically reconnected if both the network frequency and the network voltage have been continuously within the respective tolerance range for the duration of the adjustable time delay tW. After switching off due to a short interruption, the system is switched back on again if the mains frequency and the mains voltage have been within the tolerance range for 5 seconds without interruption. The short interruption condition does not apply to a failure of the operating voltage. The RP 9810 voltage and frequency monitor monitors the 3-phase voltages between the outer conductors and the neutral conductor. In addition, the 3 linked outer conductor voltages are calculated and evaluated. In both versions, the frequency is measured in 1-phase in phase L1. The operating status, the measured values and the error memory are output via an LCD display. The measured value to be output in the display is selected using a button.
