LH200C Intelligent Wireless Temperature Measurement System Introduction: With the advancement of technology, the external dimensions of switchgear are gradually miniaturized, and the layout of internal components is becoming more compact. Moreover, handcart circuit breakers have basically become the standard configuration of switchgear, which brings more serious problems of contact overheating and excessive temperature rise than traditional old-fashioned switchgear. This problem is likely to evolve into damage to the conductive circuit structure and ultimately lead to short circuit accidents, becoming a potential threat to the safe operation of switchgear, directly affecting power supply safety and reliability. For a long time, accurately and reliably monitoring the temperature rise of important contacts in switchgear has been a challenge in three aspects: (1) the internal space of switchgear is narrow and metal enclosed, making it difficult to add new devices and effectively transmit data signals; (2) The power supply of temperature measurement modules located in high voltage areas or heating nodes, as well as the ability of related electronic devices to withstand high temperatures; (3) The accuracy of contact temperature measurement is difficult to guarantee. The LH200C series intelligent wireless temperature measurement system is a new generation of intelligent wireless temperature measurement patented product developed by our company. It effectively overcomes the above technical difficulties and provides a reliable temperature rise data list and historical data for power systems and users, facilitating users to make timely predictions and decisions. This product is mainly used for surface temperature monitoring of high-voltage conductors (including electrical contacts inside high-voltage switchgear of 40.5kV and below). It has functions such as environmental temperature/temperature rise display, historical data, event recording, parameter setting, etc., and is equipped with an isolated RS485 interface/4G module for communication with the user's backend computer. The temperature measurement data of this system is true and reliable, with a contact temperature measurement accuracy of ± 2 ℃. In addition, this system adopts an extremely simplified configuration mode, and has designed highly effective wireless communication functions, a self powered temperature measurement module, and a friendly human-machine interface. Technical parameters: Working power supply: Closed CT induction energy harvesting Starting current: When the main circuit current is>3.5A~5A, the module can enter a continuous working state Impulse current tolerance: The main circuit current is 50kA. rms/4s, and the module can work normally Working environment temperature: -25~+125 ℃ Working environment humidity:<95% RH (no condensation) Temperature resistance performance of shell and accessories:>150 ℃, PPSG30 material EMC level: in accordance with GB/T 17626 Level IV Temperature measurement method: The temperature probe directly contacts the surface of the heat source, which is precise and fast Temperature measurement range: -40~+150 ℃ Temperature measurement accuracy: better than ± 2 ℃ Temperature sampling/emission cycle: 7s/28s (emission cycle is 14s during rapid heating) Communication method: IoT chip, wireless communication, communication distance within line of sight>1500 meters Installation location: High voltage busbar, circuit breaker contact arm, or other indoor electrical equipment that is prone to heating on the surface
Introduction: With the advancement of technology, the external dimensions of switchgear are gradually miniaturized, and the layout of internal components is becoming more compact. Moreover, handcart circuit breakers have basically become the standard configuration of switchgear, which brings more serious problems of contact overheating and excessive temperature rise than traditional old-fashioned switchgear. This problem is likely to evolve into damage to the conductive circuit structure and ultimately lead to short circuit accidents, becoming a potential threat to the safe operation of switchgear, directly affecting power supply safety and reliability. For a long time, accurately and reliably monitoring the temperature rise of important contacts in switchgear has been a challenge in three aspects: (1) the internal space of switchgear is narrow and metal enclosed, making it difficult to add new devices and effectively transmit data signals; (2) The power supply of temperature measurement modules located in high voltage areas or heating nodes, as well as the ability of related electronic devices to withstand high temperatures; (3) The accuracy of contact temperature measurement is difficult to guarantee. The LH200C series intelligent wireless temperature measurement system is a new generation of intelligent wireless temperature measurement patented product developed by our company. It effectively overcomes the above technical difficulties and provides a reliable temperature rise data list and historical data for power systems and users, facilitating users to make timely predictions and decisions. This product is mainly used for surface temperature monitoring of high-voltage conductors (including electrical contacts inside high-voltage switchgear of 40.5kV and below). It has functions such as environmental temperature/temperature rise display, historical data, event recording, parameter setting, etc., and is equipped with an isolated RS485 interface/4G module for communication with the user's backend computer. The temperature measurement data of this system is true and reliable, with a contact temperature measurement accuracy of ± 2 ℃. In addition, this system adopts an extremely simplified configuration mode, and has designed highly effective wireless communication functions, a self powered temperature measurement module, and a friendly human-machine interface.
