Kstar battery Agents

Kstar battery Agents Kehua is the development, production, sales and service in one of the professional power supply manufacturers, is "National Torch Program" bearer, the State Ministry of Science finds that the "national key high-tech enterprise" The company established the ISO9001 international quality management system based on large-scale production in the UPS power supply, DC power modules, inverters, batteries and other areas in a leading position, has become one of the modern power products manufacturer and the country's largest. Jingwei series VRLA batteries for UPS applications specially designed, superior performance, the technology is mature, with a safe, reliable and maintenance effort, which is widely used in finance, telecommunications, electricity, railways, insurance, transportation, education, government , military, manufacturing, business and other systems. Several tests of the UPS system?? Test UPS main purpose is to identify the actual technical indicators UPS can meet the requirements. UPS tests typically include steady-state and dynamic testing two types of tests. Under no-load steady-state test is 50% of the rated load and 100% of rated load conditions, the test input, the output of each phase voltage, line voltage, load loss, power factor, efficiency, output voltage waveform, and the output voltage distortion The frequency. Dynamic testing is generally in the mutation load (usually selected load from 0% to 100% from 100% and 0%), the change in the test UPS output voltage waveform to test the UPS dynamics and energy in the feedback path. First, the steady-state test called the steady-state test means the test equipment into the "system normal" state, and can be measured waveform, frequency and voltage. 1. The waveform is generally at no load and full load condition, the observed waveform is normal, with the distortion meter, measure the output voltage waveform distortion. Under normal operating conditions, then the resistive load, with distortion meter to measure the output voltage waveform total harmonic relative content of the product shall comply with the requirements specified, typically less than 5%. 2. Frequency generally available oscilloscope to observe the output voltage of the frequency and the use of the "Power Disturbance Analyzer" measure. At present, the UPS output voltage and frequency in general can meet the requirements. But UPS frequency circuit, when the local oscillator is not precise enough, there may be unstable when the mains frequency, UPS output voltage, frequency change also followed. UPS output frequency accuracy usually in sync with the mains, can reach ± ??0.2%. 3. The output voltage of the UPS output voltage can be judged by the following test methods: (1) when the input voltage is 90% of the rated voltage, and the output load is 100% or the input voltage is 110% of rated voltage, output load is 0 The output voltage should be maintained within ± 3% of the nominal value. (2) when the input voltage is the rated voltage of 90% or 110% of the no-load output voltage of one phase, the other two phases to 100% of rated load, or as a two-phase load, the other phase is 100% load, which The output voltage should be maintained within ± 3% of the rated value, the phase difference should be kept within the range of 4 °. To unbalanced load, the load voltage amplitude and phase, remain within the permissible range, the inverter design must be done for each phase can be adjusted individually. In the case of each of the phase voltage control of amplitude and phase, respectively, can be a three-phase load voltage is always symmetrical. Some UPS can not be adjusted separately for each phase, so when connected to single-phase load, the output voltage will be significant imbalance. For this type of UPS, will not be able to carry out such tests, when used, must also try to balance three-phase load. Further, the above-described phase unbalanced load a load, the other two phases to two phases of the rated load or no load, the other phase is rated load condition is more severe, some machines are in a two-phase unbalanced load rated load, another phase of 70% of the rated load, or a phase of the rated load, and the other two phases of 70% of the rated load conditions down to test the output voltage (each phase voltage, line voltage) of the three-phase output voltage accuracy and unbalanced degrees. (3) 15 percent when the input DC voltage variation of soil UPS inverter output from 0% to 100% load change, the output voltage value should remain within the rated voltage range of ± 3%. This indicator on the front surface of the index is repeated, but in fact it is more demanding than the previous index. This is because the control system of the input signal changes in a wide range, showed significant nonlinear characteristics make the output voltage does not exceed the allowable range, the circuit requires higher. 4. Efficiency UPS efficiency can be determined by measuring the UPS output power to input power. UPS efficiency is mainly determined by the design of the inverter. Most UPS only at 50% to 100% load only the relatively high efficiency, when the load is less than 50%, its efficiency will drop dramatically. Efficiency indicators provided by the manufacturer is also more efficiency at rated DC voltage, rated load (cosφ = 0.8) conditions. Select the best efficiency and power output curve when the user selection and DC voltage variation of ± 15% efficiency. Efficiency is equal to the active power output than the input active power and multiplied by 100%, the input power does not include a battery charging power. Testing is under normal conditions, the load is 100% or 50% of the resistive load measurement. From an economic point of view, the high efficiency of the machine, you can save electricity, the selection of capacity, the margin coefficient can be reduced more. Second, the dynamic test 1. sudden decrease or sudden load test first with "Power Disturbance Analyzer" to measure load, phase voltage and frequency steady state, then sudden load from 0-100%, or sudden load reduction by 100 % to 0%, if the UPS output voltage transients at 8% - (to follow the specific model of the indicators may be), and the return to steady state within 20ms between + 10%, this UPS the indicators Qualified; if UPS output transient voltage exceeds this range, it will have a greater surge current, regardless of the load or the UPS itself is extremely unfavorable, then you should not use this type of UPS. 2. The conversion characteristics of the test of this major test powered by an inverter to convert the mains-powered or mains power switch to the inverter power conversion characteristic time. The need for storage oscilloscope and can simulate changes in mains voltage regulator testing. To test the conversion is carried out at 100% load, especially when the mains switch to the UPS, the UPS inverter corresponds to a sudden load, the output waveform may have a ± 10% variation in the range of 1 to 2 cycle. Switching time is a load off time. This test is whether the breakpoint detection power conversion, if any breakpoints and break more than 20ms will cause signal loss. Online UPS is generally not a break, but there is an instantaneous change in the amplitude of the waveform require disappear within a half cycle. In addition, because the mains is normal UPS, inverter frequency tracking mains frequency, once the electricity is interrupted, the inverter frequency is completely controlled by the control circuit of the local oscillator, this sudden change is random It interrupts the instantaneous state of the mains and the former state of the local oscillator, a transient change in frequency control, may cause changes in the output frequency of 30%, a lot of the load can not adapt to this change. Third, other routine tests 1. overload test overload characteristic is of great interest to the user, but also to measure an important indicator of UPS. Overload test is testing machine UPS overload, ensure even load phenomenon occurred when running, UPS is also able to maintain a certain time without damaging the equipment. Overload indicator test equipment must be tested and to be at 25 at room temperature (less than 2 ~. 2. Input overvoltage, undervoltage protection testing by Device Input Voltage range allowed for testing, general UPS allows the input voltage changes ± 10%, when the input voltage exceeds this range should alarm and switch to battery power, the rectifier automatically shut down when the input voltage is restored to nominal allowable range, the device should automatically resume operation, that the battery is automatically released into the mains run in the battery and lift the automatic investment process, UPS output power waveform should change. Note that this test must ensure that the wiring is correct, especially the phase sequence must be connected right. In addition, some UPS in the city beyond +10 When% range, only the alarm without battery automatic investment performance, only when the electricity is less than -10% range, only the battery is automatically put into function. However, some UPS is in the city beyond the ± 10% range have a battery of automatic features, please note that when testing 3. discharge test battery discharge test is to verify the performance of the main discharge test, it is necessary to record the discharge time;.. Second, the output voltage waveform to be observed during discharge and discharge protection value;.. test three is to check whether there is "behind" the battery must be battery charging for continuous uninterrupted 24h before discharge test four, a special test for a UPS, the three elements of the above can be , but the real test machine and a large number of production or order is not enough, you must also conduct a special test sample tests are available special way, its contents are: 1. In the rated load for the next lead and lag in both cases, Observing UPS output voltage regulation; Efficiency Test 2. Small load conditions at 25% -35% of the rated load (lagging) conditions, good quality UPS, efficiency can exceed 80%; 3. frequent operation tests. This test consists of frequent starting and frequent transitions. (1) The purpose is to examine the frequent start inverter, PLL, dynamic stability static switch and filter capacitor and thermal stability. The method is to start UPS, when the inverter start successful, output voltage and current, after reaching the technical requirements with the load operation. Then minus load, stop, restart UPS, so repeatedly. (2) frequent switching test, mainly when detecting presence or absence of power conversion breakpoint ,, on-line UPS is not supposed to occur breakpoints start test. 4. charger. To protect the battery, to avoid the impact on the grid when the charger starts charger UPS generally start with limited flow start, charger the transition process from start to normal running time is generally more than 10s, the current generally limited to 1/10. 5. Battery capacity without battery without a battery load test .UPS, UPS has only regulator function. Without battery When the load increases, the dynamic performance of the rectifier can be tested. General requirements within 20ms ensure that the output voltage is restored to (100 ± 1)% or less. For this function, different UPS have different designs. 6. High-order harmonic testing. The higher harmonic component is generally less than 5% of the sum of the UPS, the available harmonic analyzer to test. Good UPS can filter out all the harmonics of all harmonics below 11, and the waveform is stable. UPS selection should also try to use without following the 11th harmonic harmonic UPS. 7. Output short circuit test. Such tests are generally not carried out to prevent damage to the UPS equipment. This is because some of the UPS output short circuit protection is inadequate. UPS has the power to pass, when the output short-circuit test must be carried out in case of power off the bypass. Otherwise, when the output short circuit, UPS will be in the same time limiting the load cut people bypass the power supply will blow the fuse to protect the bypass. Thus, not only do not see the output short circuit protection limiting case, the fuse will burn bypass power, should be avoided. UPS tests can also give some content, such as temperature protection performance test, operating temperature test, vibration test, simultaneous tracking test, pressure test, a rechargeable battery test, the load temperature, humidity test and reliability test, the different nature test and so on. As an official product of production, especially when mass production, all the above tests have necessary. But as a user identification and acceptance, it is not necessary, it is impossible to make such a comprehensive test. Generally static testing, dynamic testing, discharge test on it. Shenzhen KSTAR Battery Co., Ltd. Shenzhen KSTAR Lion Group and the Hong Kong International Group, issued jointly funded the establishment specializing in battery research, development, manufacturing enterprises. The company's battery products brand "KSTAR" (KSD), "MASTERLION" (lion), "KEENTON" (Kraton). Products include small sealed lead-acid batteries, sealed lead-acid batteries medium, large sealed lead-acid batteries, maintenance-free lead-acid starter batteries, gel batteries. Product specifications mainly for two in the series:? 6MF series and GMF series, 6MF series includes two ?.?????? ? 5Ah / 12v ~ 200Ah / 12V?,? GMF? Series include? 300Ah / 12V ~ 2000Ah ?.