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Adjustable DC Power Supply FAQ（2）

Click: 393    Date: 09/07/2022 4::58::34 PM

Question : Can add external control voltage to control the analog input voltage?Answer:1. Yes2. We often add 0~5V,0~10V external voltage to control the analog input voltage Question : How to check the power supply works well or not?Answer:  1. Step1: Empty the load - connect the power - to see the voltage can be regulator from 0 to the maximum voltage or not;2. Step2: If the result of Step 1 test is that it is yes, and that we continue to step 3, if the result of step 1 is not possible to determine the power supply is broken;3. Step3: Connect the power artificially shorted - off shorting the output, and the current potentiometer to spin to a minimum, and then turn up the boot, to see if there are any change of the current ammeter;4. Step4: connected to the load, take a look at the current is not able to adjust from 0 to maximum current, if not, that power is broken, if you can, you can determine the power supply is not the problem, check the load whether it is appropriate to use for the power supply Question : Why the power supply will be trip even we connect the load or no load?Answer:  1. It may be because the internal chassis rectifier bridge has been broken.  2. First test input file ends with OHM multimeter, if there are no short circuit, short circuit if all we can conclude that the rectifier bridge has been broken, the device needs to be returned to the manufacturer to replace the good bridge rectifier. Question: Does the external remote control port can design with DB9 Port ? Answer:  1. Yes2. The external remote control port , we have DB9 Port and Terminal connection for option3. As picture shows Question: For the external remote control Signal can control the output voltage only ?Answer:1. No2. Base on the request of user , our external remote control Signal can control the current and voltage in separate or simultaneously3. We offer the 0-5vdc or 0-10vdc remote control Signal in usually4. Other remote control Signal can be customize according to the customer request Question: What is difference between internal and external control signal?Answer:1. The internal control signals is connected internal potentiometer with corresponding voltage and current signals in main board to adjust and control the output2. The external control signal is supplied by two external 0-5V analog signal corresponding to the main board voltage and current signals to adjust and control the output Question: Can we make all output settings by hand-operated?Answer:1. YES2. There is a potentiometer, we can through the potentiometer knob to adjust the current and voltage. Question: Can we make Negative output?Answer: 1. Yes2. We can make negative output. Such as -30VDC. It is has the same appearance to 30VDC ,while just make the power wiring connecting reversed Question: Can you add PFC function?Answer:  The Yucoo power supply comes with the FC function. Question: If the end user CITY Power is 240VAC+/-15% but our power supply design is 220VAC+/-15%, does it still can working well ?Answer:1. In usually , it still can working well2. As our power supply support work at 240-250VAC all the time3. But if the power more than 240-250VAC and running all the time , the power supply will be broken soon4. The solution is add over or lower voltage protect function on the input of power supply Question: Does the power supply will be test in full load before shipping ?Answer:1. Yes2. The statement about all of our adjustable dc power supply have all been full load and 50% load were aging before shipping for 2-8 hours3. If the power more than 3000w, the ageing time will be more longer , about 12-15hours Question: Does Positive and negative output can switch in auto or manual? If yes, what is the Switching interval time ? is it control by a switch or by time relay ?Answer:1. It is control by time relay in auto2. The buyer should be confirm to us before purchase for how long you want to switch3. For example, if you want to switch Positive and negative output 1s. then we can set it before factory Question: Can do the adjustable power supply with high voltage but small current ?Answer:1. Yes.2. We can customize the voltage specification according to customer’s request.3. For example:  0~700V, the output current can be 0~3A.4. Otherwise, If the current is too big, very low voltage is also OK. Question: Does the power supply comes with CE?Answer:  1. NO.  2. All of the Yucoo power supply are customized under different client request, it is really different for it to pass CE. Question:What does the meter shows?On the picture it shows 4 digits display l output, can you show 1.111A and 1.111V?Answer:There have 2 meter , one is for output voltage another for output currentFor example model YK-AD15010The output voltage show only 1-150v, current 1.0-9.9ASome special design can customized base buyer request Question: Can it make 19inch rack mount typeAnswer:  1. Yes2. we can make standalone type or 19inch rack mount type according customer request Question:What is a variable power supply?Answer:A variable power supply also called a adjustable dc bench power supply, is one where you can continuously adjust the output voltage and current to you requirements.In another word, it is 100% constant current and constant voltage, you can adjust to any voltage or current as your require Question: Could you offer Form A or C/O ?  Answer:  It is totally no problem. We can prepare relative documents to foreign affairs office or other office to apply for this certificate but if the order less than 10000.00USD , Buyer should be pay 60.00USD to get it

Step down and boost DC DC Converter FAQ

Click: 665    Date: 09/07/2022 4::56::42 PM

Question： Regard as constant voltage and constant current DC-DC ConverterAnswer:A. Constant voltage DC-DC ConverterFor example:1. 24vdc-12vdc 10A, 12vdc output is fix, but the current output is automatic adaptive base on the load.2. If you connect the load not work at 12vdc , the dc converter will be burnB. Constant Current DC-DC ConverterFor example:1. 24vdc-12vdc 10A , 10A output is fix, but the voltage output is automatic adaptive base on the load.2. If you connect the load not work at 10A , the dc converter will be burn Question：Isolated & non-isolated DC-DC ConverterAnswer:1. Isolated DC Converter is no any interference, it is suitable for sophisticated equipment and there is no any ripple2. Isolated DC Converter with ripple3. DC –DC Converter we design is non-isolated Question：Step down & Boost & Automatic Step down and Boost DC-DC ConverterAnswer:1. Step down DC-DC Converter-- Input voltage must be more than 2V/more of output voltage2. For example:24Vdc to 12Vdc 10A3. Boost DC-DC Converter-- Input voltage must be less than 2V/more of output voltage4. For example :5Vdc to 12Vdc 10A5. Automatic Step down and Boost DC-DC Converter--- output voltage between the input voltage range6. For example: 9-14Vdc to 12Vdc 10A7. When 9VDC Input, it can support output 12V; When 14Vdc input, it can support output 12Vdc also; input voltage between 9-14V constantly beating the same can be stabilized output 12V; Question:  Can you customize USB dc dc converter?Answer:Yes. Question:  Can you customize multi-output dc dc converter?Answer:  For now, because of the Yucoo dc dc converter’s design and it’s capacity, we can make 2-channles as max output. Questions: What is the difference between the PCB case type and the Aluminum case type?Answer:1. Aluminum case type is waterproof2. The PCB case type is non- waterproof, but with Lightweight. Question: Can you make the dc dc converter with adjustable output volatage?Answer:NO.  We can only make it stable output. Question: Can you make the dc dc converter with adjustable output current?Answer:1. NO.  2. We can only make adjustable output current mode.  3. For example one 0-10A model dc dc converter,  if you connect with right load, all things will goes well. No need to make stable output. Question : Can make Automatic Step up and down voltage dc converter?Answer:1. Yes.2. We can customize 12V-12V &24V-24V Automatic Step up and down voltage dc converter Question ：What is the biggest power you can customize for this small size dc converter now?Answer:360W.The biggest power we can customize for this kind product is not more than 360W. Question ：Can this kind dc converter add USB port?Answer:Yes. Just add 0.2 USD each one, such as: 1.MICRO port( for intelligent phone) 2.USB female port （need connect power cable)Question:  Does this kind dc converter has reverse polarity protection on input?Answer:1. No.2. We don’t have it ,but we are trying to achieve. Question ： All of your dc converter is the same appearance?Answer:1. The material has two different kinds: Aluminium and plastic shell2. Aluminium shell is water proof, Plastic is not.3. This two materials converter each has three kinds: large size,middle side,small size .different output power has different shell.Question: what does the step down and boost dc converter will apply forAnswer1. Our products are widely used in automotive, posts and telecommunications, communications, electricity, coal, aerospace, defense, surveillance systems, railway signals, medical equipment, instruments and meters, LED displays, cable TV and other fields. If you can not find a suitable model,2. our technical engineers will be based on your actual needs, corresponding to the rapid power solutions. I hope that we can become a long-term partners.  Question: what kind of protection function of the step down and boost dc converter have?Answer:1. Overload protection2. Over-current protection3. Over / low voltage protection4. Stable performance5. Automatic recovery work6. Fully waterproof potting7. Ripple: 40MV8. Working temperature: -40 to +85 (industrial grade temperature)9. Widely used in LED car display, GPS navigation, MP3, MP4, car DVD, hard disk player, stereo, power is the best choice for vehicle equipment10. Wiring as follows: Input: Red (+) Black (-)11. Output: Yellow (+) Black (-) Question: Does the dc converter support running in full load?Answer:  1. NO , All of dc converter did not work in full load2. The Efficiency≤80%3. For example :  Model YK-DD12S2412 --12VDC-24VDC 12A DC Converter , it can support running 240w 7*24hours Question: Does ALL of the dc converter support running in full load?Answer:1. NO2. Not all the design are Waterproof, you should be confirm before purchase with our sale department3. Waterproof : IP68 Question: Does ALL of the dc converter with anti-interference filtration and TVS(1500w) function?Answer:  1. Yes, All of the dc converter with anti-interference filtration and TVS(1500w) function2. Please noted

New Product Recommendation

Click: 858    Date: 09/07/2022 4::54::05 PM

Thank you for taking the time to read about our new product recommendation. We believe that our MPPT controller can satisfy you. Products Features：1. Advanced MPPT technology2. DSP chip control3. Multiple protections4. LCD+LED display 5. 12 months warranty 

19inch Rack Mount Type DC-DC Converter FAQ (1)

Click: 785    Date: 09/07/2022 4::53::05 PM

Question: Does the DC-DC converter can be AC input or output?Answer:1. No.2. DC-DC converter just can be the type of DC input and output. Question:  Does the output is isolated ?Answer:1. Yes2. All of the Rack mount type is isolation output. Question : Can it add Monitor？Answer:1. Yes.2. The red point is the monitoring unit that added. The price is changed according to different monitor function. Question ：How to control the output voltage?Answer:1. There is two kind ways.2. It is automatic control and handling control. If handing control.there will be a potentiometer to adjust the output. Question :  Can DC DC converter add external control voltage?Answer:1. Yes.2. For example. To add 0~5V external control voltage. Question :  Can you make DC adjustable output dc dc converter?Answer 1. Yes2. we can add the add the adjustable resistance when production, and we can handle adjust the output, but the unit price will be more, you can come to the sales for more information about the specification and price. Question : can you make the multi-output dc dc converter?Answer 1. Yes,2. but for now, we can only make double output type, you can contact the sales for more information about the specification and the price. Question: Can you make the dc dc converter as desk type? As we know, all of the dc dc converter you show in the website is the 19Inch rack mount type.Answer 1. Yes.2. Normally we can customize it as desk type when the model capacity is less than 500W. You can contact the sales for more information about the specification and the price. Question : What is the mode of connection of the dc dc converter?Answer Terminal connection Question : can you make parallel operation in one dc dc converter?Answer：1. Yes2. Such as if you make two unit of 30A model,  you will finally get 60A model after you make parallel operation. Question ：what is the output circuit in dc dc converter?Answer 1. It is the same as the in the output channels2. Such as the YKDD12S4810 model with 12vdc input and 48vdc 10A output, if you want to make it with 5 channels output, each channel is 2A. Normally, we manufacturer will make 2 channels if the end users do not have special request. Question ：What is the communication mode of the dc dc converter?Answer RS232 and RS485 and RJ45 optional. Question ：What is the heat-dissipating method of the dc dc converter?Answer it is refrigeration. Question ：Can you make AC/DC double input?Answer 1. Yes,2. 220vdc and 220vac double input, Ac and dc electrical isolation completely

19inch Rack Mount Type DC-DC Converter FAQ (2)

Click: 757    Date: 09/07/2022 4::49::21 PM

Question ：what is the application of the dc dc converter?Answer 1. DC-DC converter is widely used in the area of communication and electricity.2. This product is mainly designed to meet the need of the requirements of all kinds of communication devices. Question . What is the working way of DC DC converter?Answer:1. Working whole-day when in rated current Question：What kinds of protection function of our DC DC Converter?Answer:1. Input overvoltage protection2. input under voltage protection3. output overvoltage protection4. over-current protection5. short circuit protection. Question ：Can add RS485 communication protocol。Answer:1. Yes.2. But need to remind the technical staff Question : What we should note when we connect or use the DC DC converter?Answer 1. it must ensure that the dc input Power off when the process of dc injection.2. DC line terminal contacts and other places that unnecessary naked, have to fully insulated.3. Before electricity must be grounded.4. It is strictly prohibited that to do high pressure, direct current (dc) operating in thunderstorm weather Question：When will cause the fault indicator light up?Answer:when the output voltage and input voltage abnormal (Output over voltage alarm, input undervoltagealarm) Question ： What is the MTBF(Mean Time Between Failures) of dc converterAnswer 1. MTBF≥100K hours2. High reliability, simple and convenient maintenance Question : What are the unique characteristics of rack mount DC-DC converter?Answer1. Cooling method: internal air cooling mode, with low noise.2. Different protection function, with input over voltage, input reverse polarity protection; output overvoltage, over temperature protection, output over-current, short circuit protection.3. High reliability: MTBF≥100K hours, high reliability, maintenance simple and convenient.4. EMC characteristics: Complies with EN55022 CLASS B class standard; meet IEC61000-4 LEVEL 3 standards.5. With input, output and alarm function normally indicates instructions. Question : how to definition the model number for rack mount dc converter? Answer 1. Mode : YK-DD [ VV ] S [ vvaa ]. For Example : YK-DD48S24102. YK-DD --- YUCOO Company DC Converter series3. VV--- Input rate DC Voltage .4. S--- Convert function / Single phase output5. vv---Output range DC Voltage6. aa---Outpur rate current Question : what does the rack mount type of dc converter will apply for ?Answer 1. All of the rack mount design is N+1 module structure2. Each DC modules can work in automatic equal current, can be set up for the telecommunications, electricity and wireless base stations. Question :  what is the max capacity of each module of rack mount dc converter?Answer 1. The max capacity of dc module we design is 500w2. That is to say, 48vdc output , the max current is 10A , 24VDC output , the max current is 20AOne of rack mount dc converter , it can made up by 6pcs module

Optional functions of adjustable dc power supply

Click: 745    Date: 09/07/2022 4::47::28 PM

1.0-5V/0-10V/4-20mA analog signal interface:Corresponding to external control output voltage and current (also can be independent external control voltage or current);2.0V/5V switch signal interface:When the input is 0V, the output is normal; when the input is 5V, the output is off;3.Failure dry contact interface:When it is normal, it is closed; when it is faulty, it is disconnected;4.0-5V/0-10V analog signal readback interface:Read back output voltage and output current (also can read back voltage or current separately).

Why Choose Pure Sine Wave Power Inverter ?

Click: 755    Date: 09/07/2022 4::44::55 PM

Let us first understand the basics before you choose an inverter for your specific requirement. You buy an inverter as a substitute for the grid power; when the power fails, you want the same kind of electric power to run your appliances. A pure sine-wave inverter supplies power that is of the same kind as that supplied by the grid. So, your reasons for choosing the right inverter would be: Minimising power loss so that your electricity bill does not go up. Remember that inefficient power backup will impact your electricity bill. A pure sine-wave is the most efficient in the conversion of stored power (in batteries) to alternating current for your appliances.Minimising the risk of damage to sensitive appliances that arises from modified sine-wave. This graphic representation (you need not spend too much time trying to understand it) of a pure sine wave—it is shown as a dark black line—shows you the smooth change-over. In a sine wave, the voltage rises and falls with a smoothly changing phase angle and also changes its polarity instantly when it crosses 0 Volts. In a modified sine wave, the voltage rises and falls abruptly, the phase angle also changes abruptly, and it sits at 0 Volts for some time before changing its polarity. Thus, any device that uses a control circuitry that senses the phase (for voltage/speed control) or instantaneous zero voltage crossing (for timing control) will not work properly from a voltage that has a modified sine wave-form. Advantages of sine-wave inverters for commercial establishmentsThe output wave-form is a sine-wave with very low harmonic distortion and clean power like utility-supplied electricity—essential for your expensive equipment.Inductive loads like microwaves and motors run faster, quieter and cooler. Pure sine-wave reduces audible and electrical noise in fans, fluorescent lights, audio amplifiers, TV, fax, and answering machines. It prevents crashes in computers, weird print outs and glitches in computer monitors.Imagine the impairment to performance, as well as customer dissatisfaction from the noisy, distorted running of sensitive appliances, which you could experience with the wrong choice. For example, you would be well-advised to choose the STATIC range from Genus as the much superior alternative to any commercial UPS. The output power is the pure sine wave, purer than the power supplied from the grid, thereby ensuring the total safety of home and office appliances. Genus STATICA also possesses various modern features which ensure quiet, hassle-free performance for years, and substantially longer battery life. A much superior alternative to gensets, the Static UPS from Genus allows computers, sensitive equipment like air conditioners and other high load capacity appliances to function safely during power cuts. For heavy-duty applications, Genus inverters are regulated and stabilized for Pure Sine Wave Output. This powerful machine is a complete power generation system that is suitable for all types of commercial establishments and is capable of running everything from lights to air conditioners and lifts to elevators, in a most cost-effective manner. It supplies pure power equivalent to the power supplied by the grid and is 100% safe to run the most sophisticated, expensive and sensitive office equipment without pollution. The seventh—and most significant—the reason is the total cost of ownership concept. This calls for calculating your savings in monthly electricity bills and adding the savings (over the medium to long term) in the replacement cost of expensive equipment. By now, you have understood the reasons why a pure sine-wave inverter protects equipment, thereby extending its life. So, keep the above points in mind and choose carefully and wisely.

12V 24V DC-AC inverter --FAQ（1）

Click: 754    Date: 09/07/2022 4::38::05 PM

      12V 24V DC-AC inverter --FAQ（1） Question 1---Does the inverter connect with solar system ?  Answer；l Yes.2 Because of the unique feature which combine invert, charge and AC auto-transfer switch into one complete system, inverter not only connect with solar system, also could be used in officer equipment, household items, power tools and etc. Question2:Does you inverter is off-grid or grid tie?Answer:l All of our inverter can customized is off-grid at present. Question 3: Does this kind of inverter has battery charger function?Answer:l No.2 If need, please choose our YK-W7 series. Question 4: All inverters are the transfer type of DC to AC?l Yes2 Inverters are the type of DC to AC.3 According to customer’s requirement.The AC output can be made such as 110V/120V/220V/230V/240V/380V.400V/415V Question 5: How many kinds of output wave form for inverters?l Two kinds. Pure sine wave and modified sine wave.2 Pure sine wave inverter could provide high quality AC and carry various loads, while it requires high tech and high cost.3 Modified sine wave inverter load poorly not carrying inductive load, but the price is moderate.