Under the circumstances of world warming and energy shortages, energy conservation and carbon reduction seem to have become the common goal of mankind. Who can fully utilize the cheap, reliable and inexhaustible renewable energy, who can survive the future energy crisis. In the lighting design, in response to the trend of energy saving and carbon reduction, energy saving, high luminous rate, environmental protection, emission reduction, and long life have become the most important demands outside the lighting effect.
The lighting made the night of the city romantic and fascinating, but it also caused huge public financial waste. Today, when the low-carbon economy is sweeping across the globe and the country is vigorously developing strategic emerging industries, the city's lighting landscape, known as the “graceful and luxuriousâ€, should also be turned into a green business – green lighting, to make the city shine at night. Go on a path that continues to be benign, not just illusory.
Green lighting and "secondary energy saving" compete for glory
The most critical issue with green lighting is the light source. Speaking of new light sources, this can not but mention the emerging green high-tech products - LED street lights, LED street lights have brought an epoch-making revolution to the lighting market. The prosperity of China's public green lighting led by LED street lights has begun to poke.
Green, energy-saving, environmentally friendly, low-carbon, emission reduction and other LED lamps with multiple identities have begun to bite the traditional lighting of the river with unparalleled momentum. It is appropriate that the secondary energy-saving based on LED street lamps has already broken out. As the further deepening of LED energy-saving effects, there will undoubtedly be another round of industrial storms.
However, in the current roads where LED street lamps are being explored nationwide, it is necessary to explore the second energy-saving and intelligent LED control system in combination with the characteristics of LED street lamps themselves. It is understood that the current market application of LED drive power management, LED lighting intelligent energy-saving monitoring solutions can be described as rare.
Shenzhen Maoshuo Power Company, which knows this truth, has launched the “Power Carrier Remote Stepless Dimming Solutionâ€. The power carrier technology can adjust the working brightness or on/off status of the LED according to the change of the external environment. This technology can save the trouble of laying a proprietary line and solve the problem of long-distance transmission. It is very suitable for remote control and management of LED street lights.
New intelligent solutions promote industry development
The “one-time energy-saving†effect of LED street lights is obvious to all. The “secondary energy saving†of intelligent driving of street lights is more important. At present, the reliability of high-power LED street lamps in China generally faces two major problems: one is the reliability and life of the drive power; the other is the rapid heat conduction problem of the heat dissipation system. The instability of the driving power quality has greatly restricted the development of China's LED lighting industry.
The rapid rise of Moso Power in recent years has completely solved the troubles caused by the instability of LED drive power for street lamp manufacturers and engineering customers. The high energy-saving effect of Maoshuo intelligent drive power brand will promote the healthy development of LED lighting industry more effectively.
According to reports, the new power carrier multi-channel LED power intelligent control system around the realization of energy-saving, environmental protection, multi-function, high reliability and intelligent management and other goals, increased the development of "power carrier intelligent control" function.
Its innovative features are mainly: direct use of existing power lines in traditional power supplies, advanced digital signal processing (DSP) technology and BPSK carrier signal modulation with high anti-interference suppression and long communication distance; development and provision of IP Network or GPRS network remote control and intelligent feedback LED street light on/off, dimming, voltage/current feedback, status inquiry, timing control, fault alarm and other working status, operating data and realization of LED light partitioning, sub-line, group management and other functions To achieve further power saving and extend the life of the lamp.
Power carrier LED power supply block diagram
Speaking of the power carrier LED power supply features, the elements are reflected in:
(1) Highly reliable LED street light power supply: It consists of constant voltage/constant current drive module. The constant voltage part of the circuit parameters are: output voltage 12 ~ 48V; constant current circuit design parameters are: output current accuracy ± 3 %; 0mA ~ 350mA adjustable. Design multiple protection functions such as output short circuit, overcurrent/overvoltage, overheating, etc.
(2) Signal detection module: The voltage and current of the LED lamp are amplified and rectified, sent to the analog-digital collector, analyzed and compared by the central processor, converted into corresponding voltage/current values, sent to the power carrier module, and transmitted back to the monitoring center. To determine the voltage, current and fault status of the LED light.
(3) Power carrier communication function: directly use the existing AC/DC power line as the communication medium, without laying a dedicated communication control line. LED lights can be partitioned, divided into lines, and group management. According to the needs, set the control time according to the working day, holidays, seasons, etc.; online real-time remote operation, dealing with unexpected situations such as sudden changes in weather and accidents. According to the need, automatically adjust the brightness of the LED light by time and place, save energy and extend the life of the LED light. The lamp is automatically alarmed for easy maintenance and guarantees the lighting rate. On-demand remote parameter settings for easy management and improved efficiency. Remote control via IP network or GPRS network.
(4) Expanding function: use visible light as the on/off and brightness adjustment of LED street light; data acquisition: such as temperature, humidity, power factor, etc.; monitor power supply temperature: temperature is too high, automatically reduce current or turn off LED light; Required to use, can be reserved.
Such an advantage is particularly hot in the process of the “Ten Cities and Ten Thousand Miles†project, which is currently in full swing, and the national semiconductor lighting industry demonstration project jointly promoted by relevant national ministries and commissions. It is understood that the market share of conventional products of Moso Power has exceeded 60%. This new type of product, due to its control for LED street lights, will undoubtedly promote the development of the industry, which is a great event in the industry.
Conclusion:
The vision of green lighting can't just stay on the advocacy of experts and government officials. Some big companies and big cities should stand up and take the lead in fulfilling their social responsibilities. If they can pay attention to the urbanization of green lighting, they can all notice the importance of intelligent energy-saving monitoring of LED lamps, then everyone's consensus will form a market demand for green lighting. With the demand of the market, green city lighting can be widely applied in the whole society.
The rapid development of the industry has provided tremendous development opportunities for all aspects of the LED lighting industry chain, and the technology for driving power supplies is constantly improving. Yongli Tide is the pursuit of Maoshuo Power as always. Meeting the needs of the market and customers, providing the industry-leading high-reliability drive power will be the mission and responsibility of Moso Power.
Fire cable type
UL flame retardant standards mainly have the following grades: CMP, CMR, CM, CMG, CMX.
1) Boost stage CMP stage (air combustion test / boost combustion test / Steiner tunnel test)
This is the highest rated Plenum Cable in the UL fire protection standard. The applicable safety standard is UL910. The test stipulated that several samples should be laid on the horizontal air duct of the equipment and burned with 87.9 kW gas burner Bunsen burner (300,000 BTU/Hr). 20 minutes. Pass criteria is that the flame must not exceed 5 feet in front of the Bunsen burner flame. The peak value of the optical density is 0.5 at the maximum, and the maximum value of the average density is 0.15.
This type of CMP cable is usually installed in a return air pressurizing system used in ventilation ducts or air handling equipment and has been approved by Canada and the United States. FEP / PLENUM materials that meet the UL910 standard have better flame retardancy than lower-smoke halogen-free materials that meet IEC 60332-1 and IEC 60332-3 standards, and have lower smoke concentrations.
2) Relay Level - CMR Level (Riser Fire Test)
This is a commercial-grade cable in the UL standard. The applicable safety standard is UL1666. The test stipulated that a plurality of samples be laid on a vertical axis of simulation, using the specified 154.5 kilowatt gas burner (527,500 BTU/Hr) for 30 minutes. Passing the standard is that the flame cannot spread to the upper part of a 12-foot-high room. The trunk cable does not have a smoke concentration specification and is typically used for floor vertical and horizontal cabling.
3) Commercial grade CM grade (vertical tray flame test)
This is a universal cable in the UL standard. The applicable safety standard is UL 1581. The test stipulated that a number of specimens should be placed on an 8-foot-high vertical stand and burned (70,000 BTU/Hr) for 20 minutes using the prescribed 20 KW band torch. By the standard, the flame should not spread to the upper end of the cable and extinguish itself. UL1581 is similar to IEC60332-3C except that the number of installed cables is different. Commercial grade cables do not have smoke density specifications and are generally only suitable for horizontal cabling on the same floor. They should not be used for vertical wiring on the floor.
4) Universal CMG (vertical tray flame test)
This is a universal cable in the UL standard. The applicable safety standard is UL 1581. Business class and common test conditions are similar, and they are also approved for use in Canada and the United States. Universal cable does not have smoke concentration specifications. They are usually applied only to horizontal cabling on the same floor and not to vertical cabling on the floor.
5) Home level - CMX level (vertical line flame test)
This is a UL standard residential cable (restricted cable). The applicable safety standards are UL1581 and VW-1. The experiment stipulated that the sample remained vertical and burned (30,000 TU/Hr) for 15 seconds with a test torch, then stopped for 15 seconds and repeated 5 times. The pass-through criteria for the remaining flame should not exceed 60 seconds and the sample should not burn more than 25%. The bottom of the surgical cotton should not be ignited by falling objects. UL1581-VW-1 is similar to IEC60332-1 except for the burning time. This grade also has no smoke or toxicity specifications and is intended for use in home or small office systems where a single cable is placed. This type of cable should not be bundled together and must have a sleeve. [1]
Low-smoke halogen-free cable (LSOH).
Low-smoke and halogen-free cables, as their name suggests, are smoke-free and halogen-free cables. The principle of low-smoke and non-halogen is that when the cable is burned in the flame, it will not produce a lot of toxic gas and smoke, so that people will not cause great casualties in the combustion, which greatly improves the people's survival rate in the fire.
The test requirements for low-smoke halogen-free cables meet three requirements:
Flame retardant requirements: Low smoke, halogen-free cables must be flame retardant. There are two flame retardant grades that are required to comply with IEC 60332.1 (vertical burning test for single cable) and IEC 60332.3C (vertical burning propagation test for bunched cable). Among them, the flame retardant requirements of IEC 60332.1 require the use of ordinary cable flame retardant requirements, while IEC 60332.3C requires relatively high flame retardant requirements at the trunk level.
Smoke Density Requirements: Smoke density tests are performed on low-smoke, halogen-free cables. It uses a fire to ignite a cable in a confined space. After the flame is extinguished, the final indoor smoke density is tested. It is required that in the presence of smoke, the light transmission capability can reach 60%. This ensures that people can see in the smoke. the way.
Toxicity requirements: There are several current toxicity testing methods, such as mouse experiments and so on. Halogen acid gas emission test (for low-halogen test) and gas acidity test (for halogen-free test) are used in the low-smoke halogen-free cable. The test principle is to determine the halogen content of the gas produced by the low-smoke halogen-free material at high temperatures (800°C and 935°C, respectively).
Some information describes the CM class requirements of IEC 60332.1 that are equivalent to UL (IEC 60332.2 is a test method for small diameter cables, that is, an alternative test method that cannot be used when testing 60332.1), and IEC 60332.3C is equivalent to UL CMR class requirements. In fact, the test methods of the four standards are not the same and cannot be directly compared.
In summary, there are two series of cables, one is the American CMX highly flame-retardant cable (the US standard clearly requires the CMX cable to contain halogen, in order to increase the temperature of the cable decomposition); the other is European FR/LSOH flame retardant/Low Smoke Zero Halogen Cable.
Folding this paragraph Fire Resistant Cable
In order to ensure the security of data, people hope that after a fire, they will have enough time to return all data before the entire network and transfer them to a safe place to minimize the possibility of data loss. Therefore, in the cable standards, there is also a type of fire protection standard called the "Line Integrity" standard. Its goal is that the cable can still keep the line open in the fire, so that the power and information can still be transmitted normally. Therefore, cables that meet the requirements for series integrity are also called fireproof cables.
At present, there are two types of common fireproof cable levels:
Chinese Standard: At 750°C, it can still work for 90 minutes (E90).
German standard: At 800-850°C, it can still work for 180 minutes (FE180).
Although the newly released China Data Center standard requires all cables to use CMP-grade integrated cable, that is, they can still be destroyed without damage at the temperature of 500°C, and the data can be transmitted normally, leaving a certain amount of time for emergency information backup. However, it does not meet the requirements of national standards for fireproof cables. It cannot be called fireproof cable.
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