Product Overview

Passive power temperature sensor is to realize the needs ofintelligent and automatic low-voltage distribution network, comprehensive data acquisition and monitoring is necessary. Through real-time on- line monitoring of temperature and current of bus bar, early hidden danger can be obtained to ensure the safe use of electricity. The passive composite sensor uses the electromagnetic energy around the transmission line to obtain electric energy, online monitoring the temperature and current of the cable, combined with wireless communication, to complete the fast and accurate online measurement and save the shackles of the cable, and realize the function of wireless data transmission. The product does not need external power supply and is maintenance free for life. It is suitable for on-line monitoring of temperature and current of transmission conductor in low voltage switchgear.The sensor is not in direct contact with the surface of electrical equipment, and its built-in analog temperature sensor senses the ambient temperature of the contact surface and gets the corresponding voltage signal. The temperature of the surface of live equipment can be determined by the relationship between the voltage signal induction.Non direct contact, electric field induction is used to detect whether the line is charged, and to detect whether the line is charged when there is no load and no current passing through.

Product Function

Double coil design, with protective current measuring device,overload 10-20 times of unsaturated current.
▪ Double power supply The electromagnetic energy of AC power line is collected and converted into electrical energy to provide working power for the sensor.When the measured object through the AC current is greater than 0.5A, the sensor can start to work. And through the intelligent energy storage technology to store excess energy,to ensure the continuous work of the sensor. If the current in the line is less than the starting current or the line is in power failure state, the backup battery in the sensor can be used to supply power to keep the sensor working normally.
▪ Data measurement and transmission
During the working period of the sensor, according to the set acquisition frequency,the surface temperature of the cable can be measured by the temperature sensor, and the current flowing through the cable can be measured by the current transformer, so as to realize the online monitoring of the cable temperature and current at the same time. At the same time, the sensor can automatically adjust the measurement interval according to the amount of collected energy.The collected data is transmitted to the receiving device through 433MHz wireless transmission.

Performance Index