二合一传感器

Two in one Sensor

      The TEV&AA two in one sensor independently developed and designed by the company is simple in structure and small in size. It integrates the traditional TEV and AA air ultrasonic sensors. This new sensor can be installed and tested on various power detection sites. The sensor is magnetically adsorbed to the inner surface of the metal armored switch equipment, and connected to the measurement equipment at the back end for processing and transmission (including filtering, wave detection, conditioning, digitization, identification, remote transmission), In order to carry out online or patrol inspection and monitoring on the operating power equipment, its advantage lies in its innovative design concept, and in terms of practicality, it also greatly improves the detection efficiency, which can more accurately judge the fault with dual channel auxiliary measurement.

     Partial discharge (PD) is one of the faults that occur due to the defects of the user’s electrical high-voltage insulation system. The user needs to measure the partial discharge to monitor the equipment condition and avoid faults. When a partial discharge signal occurs in a switchgear, it is usually an electromagnetic wave with a wide bandwidth. During the transmission process, a weak surface current is usually generated on the surface of the metal cabinet. Due to the non-uniformity of the surface material, a transient grounding voltage will be generated. TEV sensor is the discharge signal measured using this principle. Internal equipment such as insulator, bushing, busbar and terminal will generate vibration during surface discharge and then transmit through air medium. AA (air ultrasonic) sensor is the partial discharge signal induced by this principle.