Disconnectors and earthing switches

The center break is the most frequently used disconnector type worldwide. Its design is characterized by two rotating insulators that open and close the contacts in a sideways motion.
 

Most important features and advantages:

• Design with two rotating insulators mounted on an integrated base frame
• The current path opening to the side creates a bigger phase distance in parallel arrangements than with other disconnector types
• Convenient design allows for versatile and customized applications, e.g. in parallel, diagonal or in-line arrangements
• Integrated base frame can be easily and flexibly adapted to the supporting structure
• Available in various colors
• Sophisticated contact system ensures long service life and requires no maintenance effort
• Extended RIV limits for each voltage level reduce magnetic interference for increased efficiency and reliability
• Tested according to national and international standards, such as IEC, ANSI, GOST R and GB

Double side break disconnectors are primarily used in substations with limited phase space and where a vertical opening of the current path is not possible. The current path makes a horizontal rotating movement.

Main features and advantages:

• Has three supporting insulators
• The center insulator can rotate and carries the current path
• Outer supporting insulators carry the fixed contacts
• Two open separation sections
• Compact and stable design allows for high mechanical tensile loads
• Combination with surge arresters possible
• Available with self-interlocking mechanism and in various colors
• Sophisticated contact system ensures long service life and requires no maintenance effort
• Extended RIV limits for each voltage level reduce magnetic interference for increased efficiency and reliability
• Tested according to national and international standards, such as IEC, ANSI, GOST R and GB

Pantographs require the smallest possible mounting space and are connected to the busbar with its characteristic scissors.

Main features and advantages:

• Vertical disconnection
• Busbar connection
• Diagonal or parallel arrangement
• Applicable for flexible and rigid busbar connections
• Compact and stable design allows for high mechanical and thermal loads
• Self-interlocking mechanism prevents opening during a short circuit
• Sophisticated contact system ensures long service life and requires no maintenance effort
• Tested according to national and international standards, such as IEC, ANSI, GOST R and GB

The current path of the vertical break disconnector opens in the vertical direction, making small phase distances possible. Vertical break disconnectors carry out two movements: a vertical swinging movement, and a rotary movement around its own longitudinal axis.

Main features and advantages:

• The great distance between the supporting and rotating insulators ensures the dielectric strength of the parallel insulation, even in saline fog conditions
• Delivered in finished assemblies, reducing the time required for installation and commissioning
• Available with self-interlocking mechanism and in various colors
• Tested according to national and international standards, such as IEC, ANSI, GOST R and GB