8VM1 blue GIS for up to 72.5 kV
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8VM1 blue GIS for up to 72.5 kV
Gas Insulated Switchgear
The Siemens 8D range of gas-insulated switchgear (GIS), for rated voltages from 72.5 kV up to 550 kV, is an extremely successful product concept.
Since its introduction back in 1968, Siemens has installed more than 34,500 bays worldwide in all climatic zones of the earth. More than 420,000 years of bay operation have been recorded since. The experience gained from over 45 years with SF6 technology together with continuous development based on the latest research findings, assures demand-oriented technology and the highest possible level of quality and cost-effectiveness. All requirements, which are nowadays usually specified for modern and advanced switchgear with respect to performance and reliabiliy, are met by Siemens-switchgear.
Cost-effectiveness, reliability and customer support are the distinctive features of Siemens gas-insulated switchgear for rated voltages from 72.5 kV up to 800 kV.
Their compact design allows their use in the most confined spaces, whether in the basement of a high-rise building, in a department store, in an industrial plant, on the first floor of an old historic building or in a mobile container. The modular structure of the switchgear permits flexible designs and problem-free extension.
Siemens' gas-insulated metal-encapsulated switchgear, a world leader in terms of:
In addition to gas-insulated switchgear, we also supply gas-insulated transmission lines (GIL) for transmitting high capacities of power over long distances.
With the intelligent control and monitoring solution SICAM, Siemens has created a new system of hard- and software components for the automation of switchgear in the field of electrical energy supply.
The flexible protection and control system offers a sequence of new functions:
Partial discharge monitoring increases the reliability of high-voltage switchgears. It enables any changes in the insulation to be detected at an early stage during normal operation so that appropriate remedial action can be taken. Maintenance measures can thus be controlled according to requirements, thereby reducing operating costs. The measurement data is displayed and archived in the control room. With the aid of an expert system the user can produce trend forecasts from long-term archive data so that potential faults can be eliminated at an early stage. Thanks to the built-in self-monitoring, the system can also be used in unmanned substations.
The PD monitoring system is a sophisticated measuring system, by means of which it is possible to monitor internal partial discharges in gas-insulated switchgear (GIS).
It comprises a number of components:
1 SF6 gas-insulated metal-enclosed switchgear
2 Coupler : act as UHF antennas, integrated in the GIS at a number of points
3 PD converter box (node) : Measuring device, connected to the PD couplers of the three phases of a point of installation
4 Optical-fibre bus system : Device for data transmission between the measuring points and the contral processor unit
5 Central processor unit : Monitoring of the data stream from up to 90 measuring points
6 Operator unit : PC for visualisation, archiving and automatic interpretation of the measured data
Modem : for remote operation and data telecommunication
It is essential to raise environmental awareness and increase resource efficiency, and offshore wind power is making a major contribution to meeting these challenges. Growing power demand requires a new generation of wind power plants equipped with innovative technologies. One core aspect: Due to increased wind turbine power, there is a movement to high voltage within the wind turbine network to decrease the current and therefore the cable losses. This is where compact, environmentally friendly high-voltage switchgear can make an optimal contribution.
Based on more than 40 years of experience in producing medium-voltage vacuum interrupters and more than 3 million delivered units, Siemens introduced this proven technology to high-voltage power networks in 2010. All installed vacuum circuit breakers up to 72.5 kV are under successful operation. Siemens vacuum circuit breakers are designed in a well proven modular platform concept. Operating mechanism, control system, base frame, kinematic chain, and insulator designs are based on decades of manufacturing and operating experience.
The vacuum high-voltage circuit breaker offers the same benefits as the Siemens SF6 circuit breaker portfolio:
Vacuum interrupting technology enables the implementation of clean air as insulating medium for 72.5 kV gas-insulated switchgear (GIS). The clean air is compressed up the operation pressure into the single switchgear gas compartment, consisting of vacuum circuit breaker, disconnectors, and earthing switches.
Compact and maintenance-free GIS solution is designed for offshore wind turbine installations based on proven component technology.Vacuum interrupter and Siemens' clean air technology realizes the F-gas (fluorinated greenhouse gas)-free insulation and supports the demand for fully environmentally compatible wind power.
Different requirements of the wind farm operator results in different wind park grid topologies. 8VM1 covers according to presented single line diagrams the suitable solution for all commonly requested configurations. The dimension of the switchgear is independent of the chosen configuration. The clean air compact switchgear 8VM1 is a tailor-made solution for the new generation of the efficient wind turbines.
|Nominal voltage||66 kV|
|Rated voltage||72.5 kV|
|Rated frequency||50 Hz|
|Rated nominal current||1,250 A|
|Rated short-circuit breaking current||25 kA / 1 s|
|Transport dimensions (w, h, d)||1,200 x 2,100 x 2,800 mm|
|Driving mechanism of circuit breaker||Stored-energy spring|
|Rated supply voltage||110 V DC|
|Expected lifetime||> 50 years|
|Ambient temperature range||-30°C to +45°C|
|Insulation medium||Clean air|
Other values on request
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HV Vacuum Technology and Clean Air Insulation