Guide: Since Edison invented the light bulb, human life has since entered the light. Nowadays people are leaving the lights of the lights. It is completely inconvenient. It is dark in the night. At night, the neon is flashing. We start our night life in a bright environment. The development of light bulbs has also ranged from simple tungsten filament bulbs to various types of bulbs. Led light is one of the most common light bulbs used nowadays. What is the difference between led light and fluorescent light? When it comes to protecting eye fluorescent light and led light, these eye protection are good. These are the things we need to understand. Let's follow the small series to learn about LED. What is the difference between a lamp and a fluorescent lamp? Fluorescent lamp What is the difference between a led lamp and a fluorescent lamp? First, an ordinary lamp is a fluorescent lamp, and the principle of illumination is different from that of an LED lamp. Fluorescent lamp illumination is the high voltage generated when the ballast is energized, which stimulates the discharge between the two pins inside the lamp tube, and then excites the phosphor to emit light. This process produces high heat. LED luminescence is the electron migration inside the semiconductor, the luminescence generated, and the luminescence process does not generate heat. This is why LEDs are called cold light sources. What is the difference between led and fluorescent lamps, and secondly, LED lamps have high luminous efficiency and high brightness. Now the good LED fluorescent tube on the market can achieve more than 130 light effects, which is about twice that of fluorescent lighting. In other words, the 18W LED fluorescent lamp can be used as a 36W fluorescent lamp. From the actual lighting effect, the 130W/W 18W LED lamp can be used as a 48W fluorescent lamp. What is the difference between led and fluorescent lamps, again, LED lamps have a long service life. The life of the LED can reach more than 50,000 hours (excluding the power supply), and the life of the fluorescent tube (excluding the power supply) is 10,000-20000 hours. Fluorescent lamp Fluorescent lamps and led lights are good for eye protection. Now they are all pretending to have no stroboscopic LEDs. In fact, this is not the case. LED lamps have many control modes, and there is a resistance to buck, and then rectification plus a capacitor filter, so that the actual DC There is a strobe of 100Hz. Some use high-voltage constant current sources, this frequency is in the tens of KHz, and generally does not feel stroboscopic. There is also a PWM dimming LED lamp, which has a pulse-adjusted on-time of a few KHZ to adjust the LED brightness. Fluorescent lamps are typically 50Hz stroboscopic (rectifier type), and electronic rectifiers have tens of kilowatts stroboscopic. From a personal point of view, the LED light is a bit dazzling and not as soft as a fluorescent light. If it is not necessary now, it is recommended not to buy LED lighting series. 1, the price is high. 2, the technology is not mature enough (especially the power supply part).
Product Features
1, built-in over-current overheating, temperature control circuit technology.
2, the module design, easy installation, online replacement.
3, low leakage current, fast response time, low residual voltage.
4, alarm indication device, green (normal) v red (fault).
Maximum Discharge
Current Imax(8/μ20μs)kA
Nominal Discharge
Current In(8/μ20μs)kA
Operating
Environment-C
Surge Protector SPD,Surge Protection Device SPD,SPD Wenzhou Korlen Electric Appliances Co., Ltd. , https://www.korlen-electric.com
What is the difference between led and fluorescent lamps?
Fluorescent and led lights are good for eye protection.
Product Description
SPD Surge Protective Device,Lightning Surge Protector
Surge Protection Device (SPD)
It is a device used to limiting instant surge voltage and discharge surge current, it at least including a non-linear component.
Surge protective Device Model Selection
With the impact of international information flow, the rapid development of microelectronic science and technology, communication, computer and automatic control technology, make the building start to go for high quality, high functional area, formed a new building style-intelligent building. As inside the intelligent building there are lot of information system, <<Building lightning protection design norm>> GB50057-94(2002 vision)(hereafter brief as <<lightning protection norm>>) put forward the relative requirement to install the surge protective device, to ensure the information system safely and stable running.
SPD essentially is a equipotential connection material, its model selection is according to the different lightning protection area, different lightning electromagnetic pulse critical and different equipotential connection position, decide which kind of SPD used in the area, to achieve the equipotential connection with the common earth electrode. Our statement will based on SPD's maximum discharge current Imax, continuous operating voltage Uc, protection voltage Up, alarm mode etc.
As per << Lightning Protection Norm>> item 6.4.4 stipulation "SPD must can withstand the expected lightning current flow and should confirm to the additional two requirements: the maximum clamp voltage during surge across, capable to extinguish the power frequency follow-on current after lightning current across." That is the value of SPD's max. clamp voltage add its induction voltage of two ends should be same with the system's basic insulation level and the equipment allowed max. surge voltage.
SPD for Power Supply System Series Selection Guide
The installation of SPD at each lightning protection zone, according to the standard of low voltage electrical appearance, make classification of electrical equipment in accordance with the over voltage category, its insulation withstand impulse voltage level can determine the selection of SPD. According to the standard of low voltage electrical appearance, make classification of electrical equipment in accordance with the over voltage category as signal level, loading level, distribution and control level, power supply level. Its insulation withstand impulse voltage level are:1500V,2500V,4000V,6000V. As per to the protected equipment installation position different and the different lightning current of different lightning protection zone, to determine the installation position of SPD for power supply and the break-over capacity.
The installation distance between each level SPD should not more than 10m, the distance between SPD and protected equipment should as short as possible, not more than 10m. If due to limitation of installation position, can't guarantee the installation distance, then need to install decoupling component between each level SPD, make the after class SPD can be protected by the prior class SPD. In the low voltage power supply system, connecting an inductor can achieve the decoupling purpose.
SPD for power supply system specification selection principle
Max. continuous operating voltage: bigger than protected equipment, the system's max. continuous operating voltage.
TT System: Uc≥1.55Uo (Uo is low voltage system to null line voltage)
TN System: Uc≥1.15Uo
IT System: Uc≥1.15Uo(Uo is low voltage system to line voltage)
Voltage Protection Level: less than the insulation withstand impulse voltage of protected equipment
Rated discharge current: determined as per to the lightning situation of the position installed and lightning protection zone.
SP1 Series
Normal Working Conditions
-Altitude not exceed 2000m
-Ambient air temperature:
Normal range: -5ºC~+40ºC
Extend range: -40ºC~+80ºC
-Relative Humidity: 30% - 90% under indoor temperature condition
- At the place without obviously shaking and shock vibration
- Non-explosion danger medium, non-corrosion gas and dust ( including conductive dust)
Classification
-As per Nominal Discharge Current:
5,10,20,30,40,60KA(8/20µs)
- As per Maximum continuous operating voltage:
275V,320V,385V,420V,440V,460V
- As per to poles
1P,1P+N,2P,3P,3P+N,4P
- As per auxiliary functions:
a. With remote signal output ( remote alarm function)
b. Without remote signal output
Selection Principle
- The continuous applied voltage on the two terminals of SPD should not more than the maximum continuous operating voltage Uc value;
- The voltage protection level Up of SPD should less than the maximum impulse withstand voltage of the protected equipment;
- As per to the different earthing system and protection mode to select the specification accordingly;
Model/Technical Parameters
WR-B60
WR-B80
WR-B100
WR-B120
WR-B150
Rated Operating Voltage Un (V ~)
220V 380V
220V 380V
220V 380V
220V 380V
220V 380V
Maximum Continuous Operating Voltage Uc (V ~) kV
385V 420V
385V 420V
385V 420V
385V 420V
385V 420V
Voltage Protection Level Up (V ~) kV
≤1.8≤2.2
≤2.4≤2.5
≤2.5≤3.2
≤3.4≤3.7
≤4.0≤4.5
60
80
100
120
150
30
40
60
80
100
Response Time
<25
<100
L/N(mm²)The Cross Section Of L/N Line
16,25
16,25
16,25
16,25
25,35
PE (mm²)The Cross Section Of PE Line
16,25
25,35
25,35
25,35
35
Fuse or Switch (A)
63A
63A
63A,100A
63A,100A
63A,125A
The Line Section of Communication and Alarm (mm²)
≥ 1.5
(-40ºC~-+85ºC)
Relative humidity 25 ºC
≤95%
installation
Standard Rail35mm
Material of Outer Covering
Fiber Glass Reinforced Plastic