Voltage relay VR-100 is a multifunctional numerical relay used for busbar voltage monitoring in low and medium voltage plants. Relay VR-100 detects voltage deviation from set-up values and according to selected delay performs signalling and/or circuit breaker trip. Voltage relay VR-100 monitors unallowed voltage disturbances and its main application is generator and transformer protection. Relay can perform two stages of undervoltage and/or two stages of overvoltage protection. Relay measures phase voltages, line voltages as well as residual voltage.

• undervoltage and/or overvoltage protection
• numerical measuring signal processing
• true RMS phase and line voltage measurement
• true RMS residual voltage measurement
• high accuracy of tripping characteristics
• event recording for ten events
• optical or RS485 communication with host system
• LCD with backlight for displaying measured data, events and parameters
• self test, local and remote indication of device’s availability
• trip signalling with bi-colour LED elements
• four programmable relay outputs (option)
• small dimensions according to DIN 43700 for panel instruments