Siemens High-Voltage Circuit Breakers
Circuit breakers from Siemens
The availability of electric energy is vital for economic development and for quality of life. One of the necessary conditions for a reliable electric power supply is a well functioning transmission system. We are the only company worldwide that supports customers along the entire chain of energy conversion, with an efficient range of products, solutions and know-how for the transmission and distribution of electrical energy from one source. Circuit breakers are the central part of air-insulated (AIS) and gas-insulated (GIS) switchgear. High-voltage circuit breakers are mechanical switching devices which connect and break current circuits (operating currents and fault currents) and carry the nominal current in closed position.
As a world market leader, Siemens takes the responsibility to provide circuit breakers which meet the environmental, technological and economic conditions in the various countries worldwide. More than 90,000 circuit breakers delivered to more than 140 countries prove this.
Siemens product portfolio in the high-voltage range starting from 72.5 kV up to 800 kV and a brand-new prototype for 1200 kV. It comprises live tank and dead tank circuit breakers as well as hybrid solutions combining different functions in a compact design, such as Dead Tank Compact (DTC) and Disconnecting Circuit Breaker (DCB).
Modular design: Few basic components leading to a high diversity of types
High-voltage circuit breakers from Siemens Energy, regardless of type or voltage range, are designed in a well proven modular platform concept. This leads to a high diversity of circuit breaker types and to high flexibility with regard to various applications according to our customers’ requirements.
The main components, such as:
• operating mechanism,
• control system,
• base frame,
• kinematic chain and
• insulator designs
• current transformers (DT / DTC)
• pre-insertion resistors (PIR)
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.
This modular principle can also be found in the type definition of our high-voltage circuit breakers.