MRD-RLJ leakage relay temperature and humidity controller wireless temperature measurement device

Wireless temperature sensing system for high-voltage environments
(Applicable to high-voltage switch cabinets)


1. Temperature monitoring of high-voltage equipment
High voltage in power plants and substations Important equipment such as switch cabinets, bus joints, outdoor knife switches, etc. During long-term operation, the contacts and busbar connections of the switch generate heat due to aging or excessive contact resistance, and the temperature of these heating parts cannot be monitored, which ultimately leads to accidents.
In recent years, many switch overheating accidents have occurred in power plants and substations, resulting in fires and large-scale power outages. Solving the problem of switch overheating is the key to preventing such accidents. Realizing online temperature monitoring is to ensure the safety of high-voltage equipment. important means of operation.
2. Why use wireless temperature measurement systems to measure the temperature of high-voltage equipment
For a long time, it has been difficult to monitor the operating temperature of joints of high-voltage equipment. This is because these parts have exposed high voltages, and the usual temperature measurement methods Unable to solve the high voltage insulation problem and cannot be used. The wireless temperature monitoring system uses radio waves for signal transmission. The sensor is installed on the high-voltage equipment and has no electrical connection with the receiving equipment. Therefore, the system fundamentally solves the problem of difficult monitoring of the operating temperature of high-voltage equipment contacts.
The wireless temperature monitoring system has extremely high reliability and security. The relatively low price allows the system to be installed on every high-voltage switch and bus joint. The system is equipped with a standard communication interface and can be operated on the Internet. Through the host computer, the operating temperature data of high-voltage equipment can be recorded to provide maintenance for high-voltage equipment. Based on this, predictive maintenance of equipment failures is realized.
At present, insulation and anti-electromagnetic interference are critical issues in power systems, especially in high-voltage transmission system monitoring. They are extremely critical issues that are often encountered. As the current power system develops towards ultra-high voltage and large capacity, the operating temperature monitoring of high-voltage power supply equipment is particularly important, and wireless temperature sensing technology has become the best solution.
3. Advantages of Wireless Temperature Measurement System
The wireless system is specially designed for operating temperature monitoring of high-voltage charged bodies to achieve non-contact temperature measurement. The system includes wireless temperature sensors and wireless access equipment. Can realize networked temperature measurement.
Technical Features
) adopts . frequency band and works in the ~.() frequency band.
)Direct sequence spread spectrum, stronger anti-interference ability.
) adopts B technology and complies with... standards.
)The temperature sensor uses a built-in antenna and is the smallest in size.
)Extremely low sensor power consumption, battery life: years.
) Up to wireless sensor addressing.
) Automatic sensor recognition, no wiring, easy installation.
) can be mixed with r fiber optic system.
The technologies used to monitor the operating temperature of high-voltage equipment contacts mainly include infrared temperature measurement, optical fiber temperature measurement and wireless temperature measurement. The following is a comparison of the three temperature measurement technologies:
Wireless temperature measurement and optical fiber temperature measurement Comparison
Optical fiber temperature sensors use optical fibers to transmit temperature signals. Optical fibers have excellent insulation properties and can isolate the high voltage in the switch cabinet. Therefore, the optical fiber temperature sensor can be directly installed on the high-voltage contacts in the switch cabinet, accurately Measure the operating temperature of high-voltage contacts to realize online monitoring of the operating temperature of switch cabinet contacts. However, the surface of the optical fiber used to isolate high voltages may be contaminated, which will cause discharge along the fiber surface. This limits the use of optical fiber temperature measurement systems in temperature measurement applications for outdoor switchgear.