145kV Compact Indoor High Voltage Substation With Disconnecting Circuit Breakers From ABB

By Chris Dodds on 29th July, 2013

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145kV Compact Indoor High Voltage Substation With Disconnecting Circuit Breakers From ABB

Turnkey 145kV high voltage substation project for Borlänge Energi, Sweden, emphasises the advantages of ABB ABBDisconnecting Circuit Breakers (DCB's). Small footprint enables indoor air insulated high voltage switchgear solutions, increasing the substation availability and reliability for the customer.

ABB Benefits : No conventional disconnectors required. No accessible energised high voltage components posing health and safety risks.

No risk of open arcs during high voltage switching. Higher operational reliability compared to outdoor substations prone to faults caused by weather and birds.

As a complement to the basic version of the ABB LTB high voltage circuit breakers, which are primarily designed for conventional substation solutions, there is a Disconnecting Circuit Breaker configuration with the disconnecting function integrated in the breaking chamber.

The ABB LTB Disconnecting Circuit Breaker (DCB) is based on the ABB LTB standard circuit breaker.

The disconnecting function is integrated in the breaking chamber meaning that the high voltage circuit breaker fulfills all requirements for a circuit breaker as well as all requirements for a disconnector.

A safe interlocking system, composite insulators and a motor-driven grounding switch provide personal safety.

ABB DCB's have created the capability to design high voltage substations without conventional disconnectors, which improves operational availability.

ABB APP : ABB's DCB substations is a marketing app for clearly and easily showing the advantages of a substation equipped with disconnecting circuit breakers - click here.

Compact Air Insulated HV Switchgear With Disconnecting Circuit Breakers : ABB has a century-long experience of building substations for high voltage systems. In time with developing, designing and manufacturing of all vital switchgear apparatus also the switchgear design has been improved through the years.

One important step in the switchgear design during the latest years is that ABB’s well known high performance circuit breakers now also are available as Disconnecting Circuit Breakers.

This means that the disconnecting function is included in the the circuit breaker and no separate disconnectors are necessary.

By this move it is now possible to build substations with minimized need of maintenance and space, low failure rate, increased safety and low Life Cycle Cost, i.e. Compact Air Insulated Switchgear.

ABB Disconnecting Circuit Breakers, DCB's, can be delivered as separate apparatus or included in deliveries of complete switchgear bays.


T&D are ABB Power Product Distributors - ABB Fuses, ABB Transformers, ABB Surge Arresters, ABB Vacuum Contactors, ABB Capacitors.

  • Further reading

Switchgear Temperature Monitoring - Hot-Spot Detection Enabling Condition-Based Maintenance

ABB CMF High Voltage Motor Fuses -7.2kV Rated Voltage 100A/200A 

ABB MWK High Voltage Surge Arresters AC 4-44kV

ABB Medium Voltage Power Products

T&D are Specialist Distributors for ABB Power Products.

With the technical, commercial and engineering support of ABB Power Products divisions T&D can deliver Fuses, Transformers, Surge Arresters, Vacuum Contactors and Capacitors for the protection and distribution of medium voltage electricity and cable systems.



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DCB Disconnecting Circuit Breakers - ABB Buyers & Application Guide

Category:  ABB Power Products

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