Trouble-free and economic operation of machinery and plant is greatly improved by the reliable and continuous monitoring of single and 3-phase mains. Especially for pumping stations, fan drives and signalling systems where preventive maintenance measures or early fault detection is indispensable. If different parameters have to be monitored simultaneously, the investment, maintenance, operating and installation costs will be increased.
With the multifunction measuring relay UG 9400 from the VARIMETER PRO series, DOLD combines up to 9 monitoring functions in one device with a width of only 22.5 mm and also enables parameterisation and monitoring via Modbus. Depending on the requirements, the UG 9400 can simultaneously monitors the 3-phase mains for overvoltage/undervoltage, voltage unbalance, overcurrent/undercurrent, cos ij, active, apparent and reactive power, frequency and phase sequence. It can also be used in single-phase mains applications. The compact UG 9400 measuring relay, also has two output relays which can be configured independently for different parameters.
Commissioning, parameter setting and monitoring is quick and easy via a Modbus RTU interface. This fieldbus connection saves wiring and offers extensive diagnostic options, which increase the reliability and availability of machinery and plant. In many applications, the simple integration of Modbus RTU enables cost effective central monitoring of measured electrical variables, especially in applications with complex and extensive plant.
