Schneider Electric 51246192f0-4 a0 Protection Relay

Schneider Electric MET148-2 temperature sensor module (51246192F0-4/A0) for Sepam protection relays provides eight RTD inputs for accurate temperature measurement, enabling thermal-aware protection in power systems. It is designed for Sepam Series 20 base units (one MET148-2 per base), and for Sepam Series 40/60/80 base units two MET148-2 modules can be connected, each measuring eight RTDs of the same type. The module accepts Pt100, Ni100, or Ni120 RTDs configured for 3-wire sensors, with RJ45 connections to the base unit via CCA77x cords, and is mounted on a DIN rail along with the Sepam assembly. Key physical and electrical details include a weight of about 0.2 kg and an operating temperature range from -25°C to +70°C, with environmental characteristics matching the Sepam base units. The MET148-2’s temperature data are used by protection functions such as thermal overload (to account for ambient temperature) and continuous temperature monitoring, making it suitable for monitoring transformer windings, motor windings, and other critical equipment where thermal protection is required. This module provides a compact, plug-in temperature sensing solution that integrates with Schneider Electric’s Sepam protection family, helping operators implement more precise thermal protection strategies without additional power supplies or complex wiring beyond standard RTD cabling.