Siemens has more than 40 years of experience in vacuum switching technology and is a leader in the field of numerical protection technology. The 3AD recloser combines cutting-edge technology with quality engineering expertise in relay protection schemes for which Siemens is known.
Siemens reclosers meet all the requirements for outdoor use in accordance with the recloser standards IEEE C37.60 and IEC 62271-111.
Reclosers are used in overhead lines and in substations. Like circuit-breakers they are capable of switching normal and fault currents. The recloser consists of two main components: The switch unit, where Siemens offers its customers two designs, 12 ‒ 27 kV and 38 kV, and the controller as protection and control unit. The latter is located inside the control cubicle (CC), which also contains the electronics and auxiliary circuits. The control cubicle is also available in two different designs depending on the chosen controller.
The 7SR224 controller based on the Siemens Reyrolle protection relay family provides protection, control, monitoring, measuring and metering with integrated input and output logic, data logging, as well as fault reports. Communication access to relay functionality is via a front USB port for local PC connection or a rear electrical RS485 port for remote connection. Additional rear port options including RS232 and optical ports are available. Access to the user level menus and data is protected by multilevel password authentication.
As a second controller version, Siemens offers its customers the SIPROTEC 7SC80, which is ready for smart grids and therefore supports the integration of your medium-voltage grid. The integrated programmable logic (CFC) allows the user to add his own functions, e.g. for the automation of medium-voltage grids. Local communication with a PC is possible via the USB-DIGSI interface at the front, and also via network communication protocols. Furthermore, the 7SC80 controller offers a web-based HMI for local and remote access to the recloser in order to monitor measured values and indications, as well as to perform switching operations.
Rated voltage up to 38 kV
Factory engineered, pre-assembled and wired accessories for easy on-site installation
Advanced vacuum switching technology
Fully integrated current transformers (CTs) and voltage sensors
Dual-coil, low-energy magnetic actuator
You will find more detailed information in the recent catalog indicated on the right side of this page.