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 global network for the production of disconnectors 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.
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.
Main features
Voltage range from 36 kV to 800 kV
Rated current up to 5000 A (80 kA – 1 s)
Short-circuit currents are maximum values and maybe only valid for 1s – needs to be verified for specific application
Durable materials for use in strong seismic activity
Suitable for indoor and outdoor use
Switching capacity requirements, such as the commutating currents, electromagnetic and/or electrostatic couplings (also with values above and beyond the IEC)
Advantages
Maintenance-free contact system without spring elements
Outstanding price-performance ratio
Operational under all severe climatic conditions, including in coastal regions and areas with dramatic temperature differences, high risk of ice formation or strong seismic activity
Type-tested according to IEC 62271-102
Quality control system certified according to DIN EN ISO 9001
Delivery of completely routine-tested and pre-adjusted assemblies simplifies setup and commissioning
Life-time technical support and service on short notice
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.
Main 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
Modular Design
All device/construction types consist of the same basic components and are mostly identical:
Current path
Contact system*
Supporting insulator*
Rotating insulator*
Base frame
Connecting rods**
Drive
* except for pantographs ** except for center break disconnectors
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
Classic (no spring)
Modern (with springs)
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
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
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
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.
