The EM721D electrical fire monitoring detector series monitors the residual current in the system or branch through an external residual current transformer, and can also monitor the ambient temperature inside cables or boxes through an external temperature sensor. When the monitoring value is higher than the alarm set value, the device immediately generates an alarm signal and uploads it to the monitoring equipment through the communication interface. The EM721D electrical fire monitoring detector adopts an embedded hardware design architecture, with low power consumption, high intelligence, high reliability, intuitive digital display, and convenient operation and parameter query. During operation, real-time self inspection of internal core components can be performed to ensure reliable operation.

The EM721D electrical fire monitoring detector is suitable for centralized monitoring of electrical fires in densely populated areas such as residential areas, buildings, factories, mines, schools, hotels, etc. It is especially suitable for distribution boxes with single or double feeder lines.