Before purchasing a dual-power automatic switching switch, record all parameters required by the use position, such as rated working voltage, frequency, rated working current, phase number, conversion condition, conversion time, and type of use.
1. First of all, the working voltage, current and frequency of the dual power automatic switch and the number of phases.
As mentioned in the beginning of the article, both the parameters selected by the two power sources can be satisfied, which can only be said that the two power sources as a guide object meet only the most basic needs. The double power supply needs to meet the demand, as long as the general professionals know how to calculate this basic meet and not meet the problem, there is a double power supply standard: the rated current limit of the double power supply is not allowed to be less than 115% of the demand. Of course, in order to be safer, it is recommended that the load current of dual power supply is 125%.
2. Double power supply circuit transfer requirements. In some special cases, the user may need to double power automatic switch can be more effective and safe power conversion operation, and this special case is the requirements or conditions for the successful operation of double power supply, the user needs to consider or refer to this point when purchasing the product.
(1) There is no fault in the common power supply, so it is natural that the standby power supply cannot be converted. Why is that? The main is not active conversion. Many people in the purchase of dual power automatic switch easy to ignore this problem, dual power controller must be able to identify the instantaneous voltage floating, including some power problems of the short, instantaneous loss of voltage and so on. And the dual power controller must pass the special test experiment, can not occur in the case of external electromagnetic interference error action, so the performance of the power controller determines the conversion conditions, the most critical technology is to occur some accidents or fault judgment or identify those faults. When choosing the double power automatic switch, the general product information on this aspect is not written in detail under normal circumstances, and it completely depends on the manufacturer's product standard and the level in the industry.
(2) The failure of the power supply and the double power supply do not convert. First of all, there are many problems that can occur in the power supply, so we should first understand the accurate conversion of the double power supply under what fault when we buy the automatic switch of the double power supply, because the power supply can cause many problems and complex. According to consumer demand, the manufacturer will provide a variety of multi-function switch, so when the choose and buy must clearly understand the conversion clear condition of load and power supply quality, or because the double power supply wrong operation or confusion, facing the double power source automatic switch is often used when can only in the case of a power blackout completely at one end, And other power supply problems such as lack of phase over and under voltage, if these problems occur when the dual power supply is not converted, then the dual power supply will lose the significance of configuration. Because our country has not stipulated to the function of double power source automatic switch standards, design personnel in the design of also only marked the product model of the double power source, so can't understand the selected users double power supply model conversion time, lead to the problem is that consumers buy the double power supply, home to imagine there is a big discrepancy in actual application, is with poor demand is bigger. So consumers in the purchase of this aspect to understand clearly with the manufacturer, understand such as the lack of phase undervoltage, overvoltage, frequency deviation and so on, there is a circuit phase off the power circuit must be converted, this is the choice of dual power automatic switching switch minimum requirements.
Yueqing Lovadon Electric Co., Ltd.
