Wireless Capacitive Voltage Detector Cable Joint Capacitive Temperature Sensor

Wireless Temperature Measuring Device for Ring Network Cabinet

Introduction

    In the power system, the temperature of the electrical junction is an important parameter that expresses the normal operation of the primary equipment. Especially for the breaking contact point of primary equipment, due to equipment manufacturing, equipment aging, and environmental pollution, contact oxidation and arc impact during operation will cause contact resistance to increase. The contacts often heat up continuously and the temperature keeps rising, burying hidden dangers for the safe operation of the equipment. If not found in time, it may easily lead to fire or explosion, resulting in huge property damage. According to the National Electric Power Safety Accident Report, more than 40% of the electric power accidents that occur in power stations in my country every year are caused by overheating of high-voltage electrical equipment. In Article 11.7.2 of the State Grid Corporation's Eighteen Major Grid Anti-Accident Measures issued by the State Grid Corporation, it requires that "at the joints of the switchgear, the power mining part of the disconnector (key parts: contacts, wiring sockets) etc.), especially during heavy load or high temperature, strengthen the monitoring of temperature rise of operating equipment.”
 

Features

• Directly measure the temperature of the inner conductor of the plug to reflect the real-time temperature of the cable joint.
•  The appearance and dimensions of the original rear plug are exactly the same, and the replacement is simple.
•  Adopt voltage power taking technology, no external power supply is needed.
•  Using 433MHZ frequency band, wireless transmission, stable communication
• The host function can customize the display mode, communication port and communication protocol

Application

       The wireless temperature measuring device for the plug of the ring network cabinet is used to monitor the temperature of the cable head of various ring network cabinets and cable branch boxes online. According to the actual temperature value of the copper core of the plug, the degree of overheating of the equipment is determined. When the overtemperature occurs, the system can issue an alarm indication in time to discover the hidden trouble in time. It is of great significance to improve the reliability of cable joint operation, reduce the number of failures, and reduce failure losses.

Technical Parameters

1.  Temperature measuring plug sensor

• Temperature measurement range: -40℃~+125℃
• Temperature measurement accuracy: ±1℃  20211007
• Temperature measurement method: contact type
• Protection class: IP68
• Working frequency band: 433MHz
• Power-taking method: voltage power-taking
• Turn-on voltage: 8KV
• Sending frequency: <10s
• Lightning impulse: more than 95KV withstand voltage: 48KV/3min, normal partial discharge: 20KV, less than 2PC

2.  Wireless temperature measurement receiver

• Installation method: hole embedded
• Temperature measurement range: - 40℃~+125℃ Display mode: LCD color screen
• Alarm output: 1 (normally open, normally closed node) Communication interface: RS485
• Communication protocol: modbus (customizable) Working power supply: AC/DC85~265V
• Power consumption of the whole machine: <5W
• Wireless communication frequency: 433MHZ
• Operating environment: temperature -25℃~+85℃, relative humidity ≤ 95%, no condensation
• Storage temperature: -50℃-85℃
• Dimensions: 96mm×96mm×103mm

 
COMPANY OVERVIEW

      Xian Xiwuer Electronic & Info. Co., Ltd. is located in Beiguan, Xi'an city cover in an area of 4000 ㎡, with employees of 2300, and about 580 technicians, amongthem, there are 135 engineers, 21 senior engineers. The company has total assets of 315 million RMB Yuan, fixed assets of 137 million RMB Yuan, which is a large enterprise mainly engaged in producing electronic components. The company has the largest production scale of Varistor,SPD( Surge Protective Device)and HV Ceramic Capacitor in China, with the following main products :

1. Varistors & SPD

4. Thermistor

       The main production line and inspection equipment & instrument are imported from Japan, America, Belgium and Switzerland etc. The annual production capacity of the two leading products has been reached to 5 million pcs and 150 million pcs respectively, with the market holding rate in China of about 10% and 30% respectively by continually technical innovation. Varistors and SPD produced by the company enjoyed great reputation in the international market, being exported to many countries and areas such as Japan,USA, Hong Kong etc., with the customers like Philips India and GE in USA. are already sold to LG company in Korea with large quantity, and also to Spainand India etc.

       Not only the products quality and technical capacity, but also the completeness of the models are all in the leading place in China. The main products have got CCEE, UL, VDE & TUV approval. The quality system was set up according to the requirement of ISO9000 since 1992, and has passed ISO9002 approval by DNV International Organization in July 1994, then got ISO9001 certification by British organization in 2000, by then we are both the first one who are approved by ISO9000 certification in the North-west area of China and the same occupation. We passed all the successive periodical audit and smoothly get the new certificate registered in Holland in Aug.1997; the quality system is strengthened and completed constantly. And we also got ISO18000 certificate.

       We believe we are able to supply satisfied goods and service to customers home and abroad with the most reasonable price and the shortest delivery time, on basis of our excellent quality assurance capacity, technical development capacity and rich manufacturing experiences.

CERTIFICATE