A circuit breaker is an essential electrical device used to protect electrical circuits and equipment from damage caused by excessive current flow. It serves as a safety mechanism that interrupts the flow of electricity when it detects a fault or overload in the circuit. Circuit breakers are commonly found in residential, commercial, and industrial electrical systems, and they play a crucial role in preventing fires, electrical shocks, and equipment damage.
In substations, circuit breakers are vital components that ensure electrical power distribution’s reliability and safety. There are two primary technologies: Air-Insulated Switchgear (AIS) and Gas-Insulated Switchgear (GIS).
High-voltage circuit breakers manufactured by Siemens Energy are designed using a well-established modular platform concept. This approach results in a wide range of circuit breaker types and exceptional flexibility to cater to diverse applications based on our customers’ specific requirements.
The control system includes the secondary technical components required for operating the circuit breaker, which are mainly arranged in the control cabinet. Customers have the flexibility to choose their preferred control, tripping, motor, and heating power supplies. We offer two standard control options based on your specific needs: Basic variant or Compact variant.
The outstanding technical performance and low lifecycle costs of vacuum circuit breakers make this solution the preferred technology and led to a phase out of SF6 in power network up to 52kV.
Key attributes of vacuum circuit breakers include the capability to handle 30 full short-circuit current interruptions, 10,000 rated current interruptions, an optional 2-cycle interruption, full performance even in ambient temperatures as low as -60°C, and a maintenance-free interrupter unit throughout its operational lifetime.
It is exposed to high-voltage potential and therefore these Circuit Breaker are called live tanks. The 3AP Circuit Breaker family is available for rated voltages from 72.5kV up to 1100kV. Our high-voltage live tank Circuit Breakers are available for three-pole operations with a common base(FG), for single pole operation also with a common base (FE) or for one pole operation with separate bases (FI). Moreover you can chose between porcelain or composite insulators.
The outstanding technical performance and low lifecycle costs of vacuum circuit breakers make this solution the preferred technology and led to a phase out of SF6 in power network up to 52kV.
The Blue Dead Tank Circuit Breakers offer rated voltages up to 145kV, a rated short-circuit breaking current of up to 63KA and a rated current of up to 3,150 A. These circuit breakers are designed to offer the easiest operating and recycling processes,
The Dead Tank Circuit Breaker features a metal-enclosed interrupter unit, with the housing always grounded. This configuration is particularly advantageous when the protection design necessitates the use of multiple current transformers per pole assembly.
These characteristics make the Dead Tank Circuit Breaker a robust and versatile solution for various voltage levels and demanding applications.
The hybrid concept on which the 3AP1 Dead Tank Compact (DTC) is based combines SF6 – encapsulated components and air-insulated devices. The application of gas-insulated components increases availability of the switchgear. The 3AP DTC Dead Tank Compact is available for rated voltages from 145kV and 245kV applications.
DCB Disconnecting Circuit Breaker have an additional air-insulated earthing switch could be mounted onto the supporting structure. The disconnecting Circuit Breaker are type-tested according to class M2 and C2 of IEC 62271-108, a specific standard for combined switching devices. The 3AP DCB Disconnecting Circuit Breaker is available for rated voltages from 145kV and 420kV applications.
This device combines a circuit breaker and a disconnector in one. It has some notable features, such as no visible opening distance due to the SF6-insulated disconnector, a compact interlock for safety, position indicators for monitoring, and an optional air-insulated earthing switch for more versatility.
Choosing the right circuit breaker technology depends on the specific substation requirements. Powercap Electrical offers circuit breaker solutions to meet these needs, ensuring the utmost reliability and safety in your electrical infrastructure. Contact us to explore our products and services further.
