With the rapid economic development and improving people's lives, people increasingly high power reliability requirements. Power supply system reliability is a continuous power supply capacity, the Bureau now all achieved double-35KV substation Power supply , City Line to achieve the "Hand in Hand", some important customers a dual power supply, so power system, dual power automatic Switch Widely used.
Dual Power Automatic Transfer Switch (ATSE) in the development process
ATSE the dual power automatic transfer switching equipment, by one (or several) switch electrical appliances and other necessary (change control), is used to monitor power supply circuit, and one or several load circuit from a power conversion to another power supply switching equipment. ATSE as Fire Load or other important end of each load switch device so that the load in the normal power, emergency power supplies to choose between, and automatically switch to connect the power supply, the project has been widely used. Correct and rational choice ATSE important load in the distribution system is a key issue.
ATSE in our country has gone through four stages, namely, contactor, circuit breaker type, Load Switches Type and double-cast type. Contactor switch to the first generation, is the earliest production of dual-power switch, it is a two contactor and the mechanical and Electric Chain device composed of a mechanical chain of such devices are not reliable, large power and other shortcomings in the project being used less and less. Circuit breaker type switch to the second generation, that is our national standard and IEC standard in the so-called CB-level ATSE, it is by the two circuit breakers of the mechanical and electrical interlocking form, with short-circuit and overcurrent protection, but mechanical linkage unreliable. Load switch mode switch to the third generation, it is a load switch and a set of two built-in chain combination of mechanical linkage and reliable conversion from the electromagnetic coil to drive the switch attractive, faster. Double cast-type switch to the fourth generation, which is driven by the electromagnetic force, the built-in mechanical connection to maintain state, single-pole double switch investment integration, with simple structure, small size, its chain, conversion speed, safe and reliable etc., is a PC class ATSE.
Dual Power Automatic Transfer Switch (ATSE) trends
ATSE generally consists of two parts: switching equipment body; controller.
ATSE trends include two aspects: one is the main switch, with a high impact current capability, and can frequently change; with reliable mechanical chain, to ensure that any state power can not be parallel operation of two road ; allowed with fuse or tripping device, to prevent dual power switch caused by overload output power phenomenon; four switches with N-level before-point functions, to prevent ATSE the switch, the different systems N-line potential drift, so that the current trend is inconsistent or diversion, resulting in residual current protection device malfunction. The second is the controller, using microprocessors and integrated Chip Intelligent products, detection module has a high detection accuracy, logical judgments module has a wide range of parameter settings (voltage, frequency, delay time of screening) as well as the necessary state of display devices to meet different load requirements; with good electromagnetic compatibility, can bear the main circuit voltage fluctuations, voltage wave, harmonic interference, electromagnetic interference and other effects; switch times, and delay-time adjustable; can provide users with a variety of signals and fire interaction interface Communicate Interfaces.
From ATSE and development trend of the development process see, PC-class ATSE practical application in engineering to become the mainstream of ATSE.
CB-level differences with the PC-class ATSE
1. Two different mechanical design. Equipment switch for dual power conversion, and not as a line segment and line protection, ATSE should not take short-circuit and over current protection. ATSE consists of two circuit breakers CB-class composition, and circuit breakers are breaking arc responsibility, asking him to release the mechanical should be fast, so there is slipping of the institutional circuit breaker, and then buckle the problem; and PC-class does not exist in the aspects of the ATSE , PC-class reliability is much higher than CB-class products.
2. Different short-circuit current breaking capacity. ATSE circuit breaker CB-level short-circuit withstand current no load, contact pressure is small, the event of a short circuit or over current situation, when the contact is opened denounced the role of production-limiting, Release Trip to breaking short-circuit current, resulting in power Although electricity side, while the load power, unable to meet the secondary load on the power supply requirements; the PC level and above 20Ie ATSE can withstand overload currents, the contact pressure can not easily be denounced open, so contact difficult to be welded, to ensure that critical loads of reliable power supply. I am China Agriculture Net writer, reports some information about dried and silk flower , artificial coconut palm tree.
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