Description

Siemens Capacitor bank protection

Siemens capacitor bank protection as integrated functionality of the protection device

Capacitors and capacitor banks are used for various applications. Examples are: Reactive-power compensation for voltage stabilization, fast voltage- and reactive-power control or filter circuits for the elimination of certain frequencies.  Capacitor banks for transmission systems are complex systems customized for the special application. The design depends much on the used switching technology (for example, mechanically or via thyristor). In detail hardly one capacitor bank resembles another. However, a capacitor bank consists always of the same components (C, R, L, and switches). A capacitor bank often consists of several subcomponents which are connected to the capacitor-bank busbar via the circuit breakers. The modularity of hardware and protection functionality allows to tailor the protection device exactly to the needs of the capacitor bank or the sub component of the capacitor bank and to realize the complete protection of the whole capacitor bank or the capacitor- bank sub component with only one SIPROTEC 7SJ8 device. Capacitor banks require the use of extensive protection functionality. The protection consists of standard protection functions and specific capacitor protection functions.

Siemens Capacitor bank protection : Overcurrent and feeder protection

SIPROTEC 7SJ82

The SIPROTEC 7SJ82 overcurrent protection has specifically been designed for a cost-effective and compact protection of feeders, lines and capacitor banks in medium-voltage and high-voltage systems. With its flexibility and the powerful DIGSI 5 engineering tool, the SIPROTEC 7SJ82 device offers future-oriented system solutions with high investment security and low operating costs.

Overcurrent and feeder protection

SIPROTEC 7SJ85

The SIPROTEC 7SJ85 overcurrent protection has been designed specifically for the protection of feeders, lines and capacitor banks. With its modular structure, flexibility and the powerful DIGSI 5 engineering tool, the SIPROTEC 7SJ85 device offers future-oriented system solutions with high investment security and low operating costs.

Capacitor bank protection

Reyrolle 7SR191

The 7SR191 Capa is a numerical protection relay with a highly comprehensive functional software package.

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