Disconnectors and earthing switches
Over 121,000 high-voltage disconnectors and earthing switches available from 36 kV to 800 kVAn overview of our disconnectors and earthing switches
Learn more about the range and technology of our high-voltage disconnectors and earthing switches. Our high-voltage disconnectors and earthing switches combine state-of-the-art technology with the highest quality standards for a voltage range from 36 kV to 800 kV.
Our disconnectors and earthing switches
- 3DN1 Center break disconnectors
- 3DN2 Double side break disconnectors
- 3DN3 Pantograph disconnectors
- 3DN4 Vertical break disconnectors
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
Our disconnector and earthing switch technology
The technology of our products sets international trends. We continuously ensure our high quality through optimized production processes, constant product development and a certified quality management system.
Contact systems
Our contact systems offer the following advantages:
- Short circuit conditions increase the contact force
- Highest dynamic/thermal stability in the event of leakage current
- Optimized for applications with silver plating
- Lubrication free solution
- Maintenance-free (long term)
- Many years of operating experience (+ 40 years)
- Our contact system concept is largely based on the original RUHRTAL design
- Uses material flexibility
- 2 contact points per finger
3DN1N00 Application
Latest center break disconnector development focused on optimizing the base frame with a current path of S00
3DN1S00 Application
Latest current path optimization combines our classic contact system (R00) and modern current path arm (I00)
3DN1R00 Application
Classic contact system with classic current path arm
- Uses springs (stainless steel, optional enclosure)
- 1 contact point per finger
3DN1I00 Application
- Our modern contact system and modern profile-based current path arm (I00)
- Straight flat finger
3DN1B00 Application
- Our modern contact system and classic current path arm (B00)
- Curved flat finger
Drive systems
Our drive systems offer the following advantages:
- Completely finished and pre-adjusted assemblies simplify installation and commissioning
- Sturdy, stainless steel housing according to IP 54, standard paint
- Can be mounted on switch base on request
- IEC tested auxiliary switch with highest endurance class for greatest reliability
- Anti-condensation heater
- Fulfills the latest international standards, such as IEC, GOST R and GB
It consists of three main components: the housing, the gear unit with motor, and the electrical equipment with auxiliary switch. A motor-integrated transmission ensures maintenance-free operation and security, as well as low noise levels.
Technical data
Download table in PDF format
It is characterized by its main components, such as the housing and electrical equipment, as well as the operation using the lockable hand lever, which ensures the highest possible safety during maintenance and service work.
Technical data
Download table in PDF format
It consists of main components such as the housing and electrical equipment, and offers a special advantage: It collects signals and centralizes single pole operating mechanisms or disconnector and earthing operating mechanisms.
Technical data
Download table in PDF format
Global production network
Our global production network ensures that we are always reachable and close to our customers.
This reduces transportation costs and delivery times, and also improves our carbon footprint.
Our services for you
You can find details on our disconnectors and earthing switches and information about our services here.
- Downloads
- Services
Siemens Energy Downloads
Whitepapers & Recordings
Register for upcoming events & webinars
Siemens Energy fairs, events & webinars
