over-voltage protection relay / under-voltage / frequency / panel-mount
7SG118 Argus SIEMENS Energy Management



  • Measured/monitored value:

    over-voltage, under-voltage, frequency

  • Other characteristics:

    panel-mount, digital, configurable, for generators


The is one of a kind 7SG118 relays provide under/over voltage and frequency protection. They are connected to the secondary windings of VT circuits and external adaptor unit is available where used with capacitor cones. It is ideally used in control and interlocking schemes and load shedding schemes. Additionally, there are two or three poles in E4 or E6 cases. It allows configuration of relay functionality with the relays analogue inputs and binary input/output circuits. The Protection and instrumentation functionality is accessible via data comms channel. A fibre optic or RS485 port is provided on the rear of the relay.