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

Xian Xiwuer Electronic & Info. Co., Ltd. is a wholly state-owned company with a registered capital of 91.46 million RMB Yuan, owning a total assets of 315 million RMBYuan, under the jurisdiction of Xi'an State-owned Assets Supervision & Management Committee. There are about 400 employees, with an annual sales income of 250 million RMB Yuan.

The main products include Zinc Oxide Varistors, thermistors, H-V ceramic capacitors, SPD, and Solar Energy Surge Protective Devices. The company has advanced production equipment., among which the key production equipment and modern assembly lines are imported from Japan, U. S. A., Germany, Korea, Belgium, and Taiwan, including 18 large sintering furnaces, 8 automatic assembly lines, the largest energy impulse current generator and a series of special test equipment and environmental test equipment. In the same industry in China, the company has the largest production capacity and the highest degree of automation with the most complete testing methods.

Our employees are 8 with master's degrees and more than 80 engineers with senior technical titles. 12 technicians have been awarded Experts with Outstanding Contributions by the Xian municipal government, and 1 expert has been enjoying a special allowance from the State Council.

The company has five sites for business production and operation, covering an area of 50,000 square meters. Its construction area is up to more than 54,000 square meters.

· No.99, Fengqing Road, Lianhu District, Xi an(ceramic capacitor)

· No.1118, Ziqaing Road, Xincheng District, Xi' a (Headquarters, varistors, thermistors)

· No.11, Longshou South Road, Lianhu District, Xi' a (Registration, photovoltaic lightning protection box)

· Block A, No.18, Gaoxin Road, High-tech District, Xi' an

· Jinghe New Town Xi Xian New Area(the new plant)

• Xian Xiwuer Electronic and Info. Co., Ltd. is a wholly state-owned company with a registered capital of CNY 101.465 million (exchanged to USD 15.85 million), owning total assets of CNY315 million (traded to USD 49.22 million). It was established in 1976. Currently, it has about 460 employees, with an annual sales income of CN280 million (exchanged to USD43.75 million). The company has four production and business bases covering an area of 43052 square meters, and a construction area of more than 50000 square meters. The company has 8 persons with master's degrees, more than 80 engineers with senior technical titles 12 technicians who have been awarded Experts with Outstanding Contributions by the Xian municipal government, and 1 expert who has been enjoying a special allowance from the State Council.

• The main products include

• Smart Embedded Epoxy Pole；

• Integrated Instrument Transformer

• Capacitive Voltage Divider；

• High Voltage Capacitor Rod；

• High Voltage Film Capacitor；

• High Voltage Resistor；

• Primary and Secondary Integrated Intelligent assembly and components with the function of voltage measurement, current measurement, protection, temperature monitoring, and power supply；

• Medium-High Voltage components/parts/ assembly；

• Surge Protective Device for Power Supply System；

• Chips for lightening devices；

• Zinc Oxide Varistor；Thermistor.

Major Customers: ABB, Schneider, GE, ZTE, XD Electric, XJ Electric, PingGao Electric and etc.

• The company has the provincial Technical R&D Center. The company has developing and manufacturing experiences of the key products HV Ceramic Capacitor, SPD， Varistor, Thermistor and for nearly 20 years. There have been 32 patented technologies, 4 invention patents, and 4 national key new products. The company is in the leading position in the same industry. The company has grown very fast with a unique management system which is the fundamental guarantee to the continuous development of the enterprise under the state-owned system. In Northwest China, the company is the first to implement ISO 9001 standards and the first to promote the use of ERP management systems, having achieved ISO9001, ISO14001, and ISO45001 approval, thus standardizing and improving the management level of the company.
• Through continuous technological innovation, product R&D, and quality improvement the main technical performance and reliability of the products are at the internationally advanced level the same level as Panasonic and Siemens. The products have UL, VDE, TUV, CAS, CE, CQC, RoHS, and REACH certifications. The company has advanced production equipment among which the key production equipment and modern assembly lines are imported from Japan, the U.S.A, Germany, Korea, and Belgium including 26m large sintering tunnel furnaces8 automatic assembly lines, the largest energy impulse current generator and a series of special test equipment and environmental test equipment. In the same industry in China, the company has the largest production capacity and the highest degree of automation with the most complete testing methods. The company has two routine test laboratories with the most advanced lightning testing equipment and environmental testing equipment which comply with national standards for laboratory construction. They are the significant laboratories supported by Shaanxi Province with professional testing technicians undertaking part of the supervision and inspection of electronic products in Shaanxi Province at the same time.
• We believe we are able to supply satisfied goods and services to customers at home and abroad with the most reasonable price and the shortest delivery time. on the basis of our excellent quality assurance capacity, technical development capacity, and rich manufacturing experiences.

Through continuous technological innovation, product R&D, and quality improvement, the main technical performance and reliability of the products are at the international advanced level, at the same level as Panasonic and Siemens. The products have UL, VDE, TUV, CAS, CE, CQC, RoHS, and REACH Certification