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Evolved from a small company of only a few employees in the early 1990s, CET has been actively engaged in the research and development of high-quality digital metering, protection and networking instruments as well as intelligent automation systems that cater to different industries and applications. We are firmly committed to helping our clients create safer, more secure and reliable, energy conserving and environmentally friendly automated power systems. In 2009, CET has become a well recognized, high-technology enterprise with over 500 employees. We have also been acknowledged as a key software enterprise by the city of Shenzhen. CET is now regarded as a premier supplier of power automation solutions for Intelligent Building Energy Management, Intelligent Industrial Power Monitoring, Power Quality Monitoring, Advanced Grid Metering, Low-voltage Motor Control Centre and Comprehensive Integrated Substation Automation for industrial and utility customers alike.
CET's digital protection and monitoring devices as well as its automation systems are being widely used by thousands of customers in various industries including petroleum, chemical, non-ferrous metallurgy and steel manufacturing. As one of the participants for the delivery of "The Ultra High Current Aluminum Electrolytic DC Power Supply System", CET was awarded First Prize for the Chinese Non-ferrous Metal Industrial Technology in 2002. In addition, CET's Transys Comprehensive Integrated Substation Automation System won the Shenzhen Science & Technology Innovation Award in 2006. We have successfully commissioned our digital, microprocessor based DC protection and control instrumentation in over 100 large rectifier substations with highest voltage and highest current reaching 220kV and 350kA, respectively. CET is the No.1 provider of Comprehensive Integrated Substation Automation System for Rectifying Substations in China.
CET's PMC series digital protection relays, integrating the features of harmonics analysis, incident pre-alarming, SOE log, high-accuracy multi-function metering, multiple communications ports and multiple protocol support, represent a new generation of microprocessor based protection devices designed specifically for industrial applications. The advanced PMC series protection relays even come with resonance monitoring and control, online generator startup testing, online fault monitoring and diagnosis for large equipment, data sharing with DCS and interlocking control functions.
 CET has developed the PMC-550 Intelligent Protection and Monitoring Device for low-voltage motors and motor control centre, which have been widely used in many manufacturing industries. A typical factory converts electric power into mechanical energy for its production processes using a large number of low-voltage motors. The safe and reliable operation of motors dictate the sustainability of production as well as equipment safety.
Our new intelligent Motor Control Centre not only provides routine protection, monitoring and control for low-voltage motors but also offers additional functionalities such as metering, incident pre-alarming and event reporting. The Motor Control Centre can be deployed as a sub-system of the comprehensive integrated substation automation or power monitoring system, thus elevating the overall safey and reliability of the electric supply system for the entire enterprise.
The speedy development of the Chinese economy gave birth to numerous investments in different technology sectors across China such as chemical manufacturing, aircraft production, pharmaceuticals and precision electronics manufacturing. As CET predicted over 10 years ago, following the demands for remote metering, remote communications and remote control of the electrical supply system, customers would once again raise their requirements for better quality power, TOU billing, event recording, speedy diagnosis and energy conservation in order to satisfy their goals for improved security and reliability. To accommodate these increasing demands from customers, we proactively developed a series of digital protection and metering devices such as the PMC-6510 digital protection, monitoring and control device and the PMC-500 series digital multi-function meters. In particular, the PMC-5600 advanced power monitoring device is able to sample 128 points per cycle and provide harmonics up to the 63rd order.
Our PMC series intelligent devices are the direct results of years of experience that CET has accumulated from the fields of advanced grid metering, advanced power quality monitoring, metering accuracy, harmonics analysis and orders, accuracy of harmonics calculation, SOE logging and resolution, equipment reliability as well as overall cost-effectiveness. CET is considered the premier supplier of intelligent protection and monitoring devices and systems becase we provide better value and integration capability than any of our domestic or international competitors. Therefore, customers of our intelligent industrial power monitoring systems have achieved better performances with respect to system stability, reliability, automation proficiency, energy efficiency as well as event recording and analysis.
CET is the leading supplier of Intelligent Building Energy Management System in China.
With over 15 years of experience and a throughout understanding of the market requirements for safe, secure, reliable, automated and energy conserving power supply systems, CET has independently developed the PMC-500 series intelligent power monitoring devices to satisfy this demand. In particular, the PMC-580 is an advanced power quality monitor capable of sampling 1024 points per cycle and recording voltage fluctuations in the power supply system with milliseconds accuracy.
CET's Intelligent Building Energy Management and Power Monitoring System integrate functionalities like power quality monitoring, incident pre-alarming, SOE loggoing and advanced metering. It significantly improves the security and reliability of the power supply system for large commercial buildings. Our portfolio includes key, nationally recognized construction projects such as the new Beijing CCTV building, new Beijing TV building, National Olympic Sports Centre, Shenzhen-HK Western Corridor, Hangzhou City Hall, Dalian Future Exchange Building, Tianjin Taida International Convention & Exhibition Centre, Wuhan Sports Centre, Jinan Olympic Centre, Xiamen Strait Exchange Centre & International Convention Centre.
CET understands the importance and values for the effective prevention of electrical fires. With its experienced R&D team, responsive market demand analysis, technical innovation and its strict compliance with the newly formulated national standard on electrical fire safety, CET has developed the EFSys Electrical Fire Monitoring System, the PMC-EF Series Electrical Fire Alarm Control Panels as well as the PMC-53M-12 Series Electrical Fire Monitors, taking a leadership position in the field of electrical fire monitoring to achieve an early warning system capable of preventing electrical fires by remotely interrupting the defective power supply.
As a forward looking and leading provider of Intelligent Building Power Management System, CET has innovatively integrated electrical fire monitoring into our popular intelligent building power management system, sharing a similar set of equipment and avoiding redundancy. This unified system not only reduces the total investment costs but also improves the overall management effectiveness with a single integrated system.
With over 10 years of accumulated experience in high-accuracy sampling and 3-phase power calculation technology, CET has rapidly become one of the most recognized firms in the area of online power quality monitoring.
The PMC-580 power quality monitoring device that CET has independently developed employs high-speed 32-bit Central Processing as well as Digital Signal Processing units, capable of sampling 1024 points per cycle. The device utilizes 16-bit A/D converters to provide high-resolution AC measurements. The PMC-580 is designed to monitor the power quality of those institutions that are extremely sensitive to voltage fluctuations such as the satellite launch facilities, large IC factories, and precision electronics manufacturing facilities. The PMC-580 can assist users in capturing and analyzing the causes of these power quality events, reducing losses as a result of poor power quality, improving product quality and operational efficiency.
The power quality monitors and monitoring system that CET has developed and imported have been widely used in various PQ sensitive applications such as the Lingbao HVDC Converter Station (330kV/220kV) between Northwest China and Central China Power Grids, Gaoling Substation of Northeast China and North China Power Grids, eight 500kV substations of Guangdong Power Grid, Shanghai Electric Power Co., An'hui Power Grid, Yunnan Power Grid, Zhejiang Power Grid, Jiuquan Satellite Launch Facility, INTEL Chengdu Plant and NOKIA Dongguan Plant.
CET is one of only a few suppliers in China technically qualified to contract high-end grid metering and billing system projects for national-level power grids, provincial-level power companies as well as large power plants.
The ION high-end grid meter that CET imports from North America has satisfied various users with its high accuracy, high reliability, multiple communications ports, multi-function, long life and its power quality monitoring and analysis capability. Grid metering and billing are critical economic factors for power plants, national-level or regional-level power grids as well as large, grid-level power consumers. To date, CETcustomers of advanced grid metering include:
1) a large number of 500kV substations owned by National Power Grid, East China Power Grid, Central China Power Grid and South China Power Grid
2) a large number of provincial-level 500kV/220kV substations owned by Chongqing Power Grid, Hubei Power Grid, Fujian Power Grid and Jiangxi Power Grid
3) a large number of power plants such as Shenzhen Eastern Power Plant, Kunming No. 2 Power Plant, Hunan's Shimen Power Plant, Hunan's Jinzhushan Power Plant, Hubei’s Yangluo Power Plant, Chongqing’s Songzao Power Plant.
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