DC switchgear

circuit breaker

Retrofit of switchgears 600...3300 V At this moment in DC networks are used switchgears which were put into operation several decades ago. Worn-out switching devices and outdated control systems reached the end of their service life and don't ensure power supply reliability with continuously increasing requirements to it. The main reason of using the outdated equipment is a lack of costs for its total renewal. Modernization (retrofit) of switchgears through replacement of outdated components for the new ones is the best possible and efficient solution, as modernization costs are significantly increased by applying former equipment case and minimum expenses for deinstallation of the old equipment and installation of the new one. reducing of modernization costs extension of switchgears lifetime increasing of reliability and maintenance safety reducing of operational costs in the future The solutions for modernization of DC switchgears include: •replacement of high speed circuit breaker; •replacement of control and protection system; •replacement of spare bus switch and working bus disconnector; •installation of line testing device (short circuit tester); •installation of traction network monitoring and protection system (SMTN-3). REPLACEMENT OF HIGH SPEED CIRCUIT BREAKER Within the framework of switchgears modernization PLUTON offers modern high speed circuit breakers produced by Secheron and General Electric as a new switching device. A new high speed circuit breaker is installed into the cubicle in position of disassembled circuit breaker, with connection to the existing conductor busbars and maintenance of safe operation, inspectability and maintainability.