In the power supply connection components of single-phase and three-phase meters, if the temperature of a certain terminal is greater than the set alarm threshold and the duration is greater than the set overheating judgment delay time, this condition is terminal seat overheating. In the scenario of overheating of the terminal block, a temperature sensor will be implanted inside the copper terminal after being insulated and sealed to measure temperature. When encountering a single-phase meter with 4 terminals, the local and remote 1+4 temperature measurement chip GXTR304 is used. If there are 8 terminals for a three-phase meter, the local and remote 1+8 temperature measurement chip GXTR308 is used to provide multiple terminal seat temperature monitoring functions with one chip. Thresholds are set and monitored for terminal seat temperature, terminal seat temperature minute variation, and terminal seat temperature imbalance.
