• operating mechanism, • control system, • base frame, • kinematic chain and • insulator designs are identical and based on decades of manufacturing and operating experience. Our GIS switchgear range also includes the same interrupter units, operating mechanisms and control elements.

By applying this proven modular design not only at our lead factory in Germany, but also within our global manufacturing network, we are able to fulfill the highest expectations regarding availability and reliability at eminently competitive prices. Our complete 3AP family up to 800 kV and above relies on our arc-quenching principles, either the self-compression or the dynamic self-compression principle using the thermal energy of the arc. Siemens patented this method for arc quenching in 1973 and has continued to develop the technology of the self-compression interrupter unit. In short-circuit breaking operations the actuating energy required is reduced to the energy needed for mechanical contact movement.

Self-compression principle For applications up to 245 kV, our 3AP circuit breakers with self-compression principle ensure optimum switching performance under every operating condition. Stored-energy spring mechanism The operating mechanism is a central part of high-voltage circuit breakers. The drive concept of the 3AP circuit breaker family is based on the patented stored-energy spring principle and is identical on all types. The use of such an operating mechanism for voltage ranges of up to 800 kV became appropriate as a result of the development of a self-compression interrupter unit that requires minimal actuating energy. The compact design of this operating mechanism makes it possible to place the stored-energy spring mechanism within the control cubicle in a compact housing. Halo combat evolved download. The mechanism types differ in terms of the number, size and arrangement of the opening and closing springs.

Both the closing and opening springs are located inside the operating mechanism, thereby achieving a simple and sturdy device. This design minimizes the number of required moving parts. The use of roller bearings and of the maintenance-free charging mechanism is a prerequisite for reliable operation over decades. Proven design principles such as vibration-isolated latches and load-free isolation of the charging mechanism were retained. Advantages of the stored-energy spring mechanism.

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Test field at Berlin factory accredited to EN 45001 and part of independent PEHLA organization The foundation of quality for Siemens high-voltage circuit breakers begins right in the development of a new product. Switching performance, high voltage stability and performance under normal mechanical loads (wind and short circuits) as well as seismic conditions are simulated and optimized in the outline design phase using computer-aided calculations. The use of parts and assembly units in a large number of breaker types such as live tank, dead tank, as well as GIS leads to a high volume standardization of the main components.

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