Test solutions for the LED industry
Throughout the entire LED industry chain, from chip to packaging, finished products, no need to test the various photoelectric indicators of the product, all test procedures are carried out under the premise that the LED is powered on. However, almost all LED product manufacturers, LED test system integrators and LED certification companies pay great attention to the entire test system, but few people pay attention to the most basic test instrument power supply. In the entire LED test system, the power supply is the most basic power supply device, and its function is not only as simple as power supply. Suppress surges and protect LEDs After in-depth research and analysis, it is found that when the LED test is performed using a common power supply, the average life of the LED will be reduced by 20-30% after the test is completed. The most immediate problem caused by the unintentional decline in product life during the test is that the downstream manufacturer cannot pass the aging verification of the product. In the investigation of the LED industry, many manufacturers were plagued by this problem. They constantly suspected that their test equipment had serious deviations, and even sent technicians to the client for on-site verification, which could not solve this problem. Who can think of it? The competition is caused by the power supply. In this regard, the researchers have proposed a simple and effective solution, using advanced technology to improve the function of the DC power supply, to achieve the effect of suppressing the inrush current, thus protecting LED. Connect the LED lightbar to the IT6200 series DC power supply, turn on the power output in normal mode and LED mode, and supply power to the lightbar. Under the condition that the current command is set to Iset=20mA, the current waveforms captured by the oscilloscope are respectively As follows: As can be seen from the figure, when the LEDmode is selected for testing, the current of the IT6200 DC power supply series rises very smoothly to the set value at startup, and there is no surge current generated, so it will not affect the life of the LED product. . This figure also explains from the side why the ordinary power supply will reduce the life of the LED product during the test, and as the test current increases, the surge current generated by the ordinary power supply will also increase. Therefore, the use of scientific research personnel IT6200 series DC power supply in LED related tests is the best choice. Improve test efficiency LED products often work in high-voltage, low-current environments, especially for products such as LEDbacklight, which typically use extremely small currents for testing. Ordinary power supplies can easily enter the current limit mode at a small current output, resulting in a delay in voltage rise time. The smaller the current and the higher the voltage, the longer the corresponding rise time. Researchers IT6200 series DC power supply, with another unique test mode lowcurrentmode, can solve this problem. In this mode, the IT6200 series power supply can be started with a small current and the voltage rises at a high speed. When this mode is turned on, the rise time of the output voltage is not changed by the magnitude of the microcurrent, which greatly speeds up the voltage rise time and shortens the time during which the LED product is lit, thereby improving test efficiency and productivity.
PVC Insulated Cable (Wire)
1. Product standard
The product is manufactured according to the standard of GB5023-1997 and JB8734-1998 or IEC, BS, DIN and ICEA upon request.
2. Application
The product is suitable for use in power installations, fixed wiring or flexible connections for electrical appliances with rated voltages up to and including 450/750V respectively.
3. Operating characteristics
Rated voltages of Underground Cable U0/U: 450/750V.300/500V and 300/300V.
Max .Permissible continuous operating temperature of the conductor:
227 IEC 07 (BV-90) 90℃
227 IEC 08 (RV-90) 90℃
For other types 70℃
The ambient temperature under installation should not below 0℃
The bending radius of cable:
D≤25mm ≥4D
D＞25mm ≥6D
(D-Diameter of the cable )
4. Type and Designation:
Type:
227 IEC 01(BV), 227 IEC 02(RV), 227 IEC 05(BV), 227 IEC 06(RV), 227 IEC 07(BV-90), 227 IEC 08(RV-90), 227 IEC 10(BVV), 227 IEC 42(RVB), 227 IEC 52(RVV), 227 IEC 53(RVV), 227 IEC 74(RVVYP), 227 IEC 75(RVVY), BV, BLV, BVR, BVV, BLVV, BVVB, BLVVB, RVS
Designation:
227 IEC 01(BV): Single-core non-sheathed cable with rigid conductor for general purposes
227 IEC 02(RV: Single-core non -sheathed cable with flexible conductor for general purposes
227 IEC 05(BV): Single-core non -sheathed cable with solid conductor for internal wiring for a conductor temperature of 70℃
227 IEC 06(RV): Single-core non -sheathed cable with flexible conductor for internal wiring for a conductor temperature of 70℃
227 IEC 07(BV-90): Single-core non -sheathed cable with solid conductor for internal wiring for a conductor temperature of 90℃
227 IEC 08(RV-90): Single-core non -sheathed cable with flexible conductor for internal wiring for a conductor temperature of 90℃
227 IEC 10(BVV): Light PVC sheathed cable
227 IEC 42(RVB): Flat non-sheathed flexible cord
227 IEC 52(RVV): Light PVC sheathed flexible cord
227 IEC 53(RVV): Ordinary PVC sheathed flexible cord
227 IEC 74(RVVYP): Oil-proof PVC sheathed, screened flexible cable
227 IEC 75(RVVY): Oil-proof PVC sheathed, non-screened flexible cable
BV: Copper conductor PVC insulated wire
BLV: Aluminum conductor PVC insulated wire
BVR: Copper conductor PVC insulated and sheathed round cable
BVV: Copper conductor PVC insulated and sheathed round cable
BLVV: Aluminum conductor PVC insulated and sheathed round cable
BVVB: Copper conductor PVC insulated and sheathed flat cable
BLVVB: Aluminum conductor PVC insulated and sheathed flat cable
RVS: Copper conductor PVC insulated twisted flexible cord for connection
PVC Single Core Cable,Building Flat Wire,Flat Building Wire,Electrical Cable Wires,Underground Cable Huayuan Gaoke Cable Co.,Ltd. , https://www.bjhygkcable.com