北京恒通达电气有限公司地处首都北京，具有高科技人才和信息化的优势，与有关军工科研单位、国内有关大专院校、铁路科研及运营部门建立有广泛、深入和密切的合作关系。是集设计、开发、生产、销售、服务于一体的高科技企业、及时掌握本行业动态、以铁路电气化和电力系统急需应用课题为龙头、不断研制、开发和生产新产品、以适应铁路电气化、电力系统市场发展和变化的需要。

公司有专业配套厂房，厂房面积达8000多平米。公司技术力量雄厚，生产设备先进，检测手段齐全，公司本着“质量精良求生存，开拓创新求发展”的宗旨，拥有一套完善的质量保证体系和严格的管理制度保证产品质量。并建立有优良的售后服务体系，竭诚为广大用户服务。

北京恒通达电气有限公司以开发生产电力系统和铁路电气化所需高压电器设备及自动化和故障检测产品为主，兼营其它机电产品及货物、技术进出口贸易。是集开发、设计、生产、销售、外贸、安装、服务于一体的北京市民营高新技术企业。。

公司主要产品均拥有自主知识产权，自主研发的多项产品通过国家省部级鉴定并获得多项专利和软件著作权，具有较强的市场竞争优势，主要产品有：高压线路故障判断装置、接触网故障行波判定装置、KGN8-27.5/55型铠装固定式金属封闭开关设备、KYN28-27.5开关柜、户外单相真空隔离负荷开关、隔离开关、电气化铁路接触网防（融）冰装置、高压快速熔断器、延时热爆开断器、真空避雷器、智能化可编程控制器、高压馈线绝缘护套管以及电子式高压电压互感器、电流互感器、行波传感器等。

　　　　　　　　　　　　　　　　　　　Company Introduction

Beijing HengTongda Electrical CO., LTD is located in Beijing, the capital of China，with hi-tech personnel and the information priority. There are extend, in-depth and closed co-operational relationships between the company and the related institutions of higher education, the railway scientific research units as well as design and operational departments. The company is a hi-tech enterprise engaged in designing, developing, manufacturing, marketing and service. Based on the mastery of this industry trends, it can research, develop and manufacture the new products with the lead of the urgent research topics needed by the railway electrical and electric power systems in order to be adapted to development and change needs of the railway electrical and electric power systems.

The company is powerful in the technical strength, advanced in the production devices and complete in the test methods. Holding “excellent quality for survival, exploiting with innovations for new developments ” as our tenet, it has a completed quality assurance system and strict management regulations to ensure the product quality as well as establishes the perfect aftersales service system to serve customers.

The main products of the company consist of high-voltage line fault identification device, outdoor AC vacuum load switch, indoor single-phase isolating load switch, isolating switch, high-voltage quick fuse, electronic voltage system, current mutual-inductor and high-voltage feeder insulated bushing, etc.

The leading product of the company, which is high-voltage line fault identification device, accords with the requirements of the main technical policy on railway traction power-supply equipments issuedby China Railway Ministry. Project-established by China Railway Ministry and identified by experts, the device is reasonable in design and approved to be highly safe and precise after multi-year in-site operation. It fills up the blank in the field of domestic electrified railway, belonging to the domestic first found. Its application extension proposal should be taken. It obtains Chinese Patent of Practical New Pattern and until now has been solely produced by us. The device is extensively applied in many electrified railway construction projects such as Qinhuangdao-Shenyang high-speed electrified railway, Xi`an-Hefei electrified railway, Neijiang-Kunming electrified railway, Zhengzhou-Xuzhou electrified railway and Hangzhou-Zhuzhou electrified railway as well as overhaul projects of each railway ministry and transformer substation.
Being a person with pure-heartedness
Doing a job with steadiness and sureness
Exploiting with innovations
Making progress with energetic attitude
High Voltage Line Fault Detector
The high voltage line fault detector makes nondestructive inspection (NDI) to high voltage line in the state of high voltage & low current by automation or hand operation, which can accurately judge the fault character (permanent/instantaneous fault) of the high voltage line, and it put selective coincidence brake to the fault line so that can avoid forced feeding to the fault line in the state of permanent fault. The detector can effectively reduce the instance of short circuit, and can especially decrease near end short circuit that will make repetitious short circuit current impulsion to the expensive equipments, such as transformer and breaker, etc, which can avoid widening the accident scope, extend the reconditioning period and service life of the equipments, and effectively improve the function environment of power supply equipment and high voltage electric.
The components and elements of the detector
The detector is composed of the primary equipments, including special high voltage fuse, high voltage current limiting device, voltage, current mutual inductor and compound isolated circuit, and the secondary equipments, including automatic control device and coincidence brake with the key component of microcomputer fault detector. Put 27.5Kv high voltage into the fault feed line with low current to measure the value of voltage and current for 0.5~1 second. According to the value, the detector can judge the fault character, and then put selective locking to the coincidence brake.
The typical applications of the detector
Making short circuit fault as the feed line working normally, the detector will automatically detect whether the high voltage feed line is permanent fault using high voltage & low current, and then determine to do or not power supplying to the feed line coincidence brake. If there is permanent fault, the coincidence brake will lock automatically.
After finding short circuit fault and examining & repairing contact net, transformer and vacuum switch, the detector can detect whether the feed line is permanent fault and the earth circuit is wiped off by hand-operation startup mode, and then switching in & supplying power.
Before supplying electric power to the feed line for the first time, the detector inspects whether the feed line is in the safe state without fault by hand-operation startup mode, and then determines to switch in & supply power to the feed line.
Making power cut to the feed line and before closing the earth switch to feed line, the detector can detect whether the high voltage feed line is in the state without electric power, and then close the earth switch.
Using the way of high voltage & low current, the detector can take low current short circuit test in the electric supplying arm, which will measure the actual reactance value of high voltage feed line in various geography & weather environments, and the actual relative curve with circuitry distance. The detector supplies practical nondestructive inspection to determine the basic parameter of high voltage circuitry and judge the fault point distance.
The detector belongs to the program of ministry of railways, and experts have identified that:
The detector is designed with reason and supplies a gap of electrified railway in our country, as well it is initiative in home, suggesting popularizing. Through fieldwork operation and test for many years, the detector is proved with high security and veracity. The detector has satisfied the requirements offered by ministry of railways about “actively research & use the automatic coincidence brake judging permanent fault and instantaneous fault” in the policy of 《the main technical equipment policy of railway traction power supplying》. It has been used in many electrified railway programs and the repair programs of railway agency and transformer substation of power supply station in Qin-Shen railway, Xi-He railway, Nei-Kun railway, Zheng-Xu railway and Zhe-Gan railway, etc. The detector gets the practical and new patent of the People’s Republic of China, and is solely produced by us at home.

The technology specifications of high voltage line fault detector