In recent years, under the global awareness of energy conservation and environmental protection, governments around the world have begun to pay attention to the problem of lighting energy consumption. Therefore, there are measures to eliminate low-efficiency light sources and encourage the use of high-efficiency light sources. The most important thing is that the industry is advertised as the first in the lighting industry. Three revolutionary light-emitting diode (LED) lighting, governments have invested in relevant research and subsidies. Driven by global energy-saving lighting policies, active investment by manufacturers and continued decline in LED lighting prices, the global LED lighting market continued to grow in 2013, reaching US$25.6 billion, a 30% increase from 2012. In the future, with the continuous improvement of the cost performance of LED lighting and the increasingly stringent global energy conservation and environmental protection policies, the overall market size in 2017 is estimated to reach 46.2 billion US dollars (Figure 1). Figure 1 Global LED lighting market size forecast Source: IHS, ITRI IEK (05/2014) LED lighting products can basically be divided into LED replacement lighting and LED lighting products. LED replaces lighting products and traditional light sources can be directly replaced, consumers can directly use without replacing lamps, so it has become one of the most important products in the LED lighting market. Among them, the LED bulb market is the fastest growing, but LEDs replace lighting. The barriers to entry are low, market price competition is fierce, and prices are falling rapidly. Therefore, the proportion of LEDs replacing the lighting market is maintained at around 30%. LED lighting products are small and diverse, and the unit price and gross profit are higher than LEDs to replace lighting products. Therefore, the proportion of LED lighting market can be maintained at around 70% (Figure 2). Figure 2 Global LED lighting market product changes Taking LED instead of lighting as an example, in 2013, the overall LED replacement lighting device penetration rate was only 1.4% (Figure 3). In 2013, Retail, Warehouse/Storage and Hospitality are the application market with high installation rate. LED replacement lighting is mainly price-oriented. Therefore, in the future, LEDs will replace lighting devices with a significant increase in LED cost performance. The rate will grow. Figure 3 LED replaces the lighting device rate change - by number Government subsidies are the main market incentives Figure 4 LED lighting market development driving force and resistance analysis chart The driving force of LED lighting market development includes energy saving and carbon reduction demand, government policy attention and product cost performance improvement; LED lighting resistance includes high cost, market disorder risk, lack of product standards and long-term organic light-emitting diode (OLED) lighting threats (four points ( Figure 4). High-voltage Current Transformer Classification of high-voltage transformers:
Fully enclosed transformer: The whole body is enclosed.
In AC circuits, transformers are commonly used to convert high voltage into low voltage, and large current into small current, which is then used for measurement, control, and protection. This not only increases the range of measuring instruments, facilitates instrument standardization, reduces the voltage and current of control and protection equipment, but also isolates the instruments from equipment or high-voltage circuits, ensuring the safety of instruments, equipment, and personnel.
Current transformers, Transformer for Ring Main Cabinet, dry type current transformers, specialized transformers, High voltage transformers Henan New Electric Power Co.,Ltd. , https://www.newelectricpower.com
1. Classified by function:
Voltage transformer: such as JDZ series
Current transformer: such as LZZB series
2. Classified by filling material:
Oil type transformer: internally filled with insulating oil
Dry Type Transformer: filled with epoxy resin internally
3. According to the closure level
Semi enclosed transformer: For example, the corner shaped JDZ transformer, wiring terminals, and other parts are exposed, while other parts are enclosed.