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ABB Sweden: greater network stability for American customers

ABB Sweden: products for power transmission

The ABB Group operates in around 100 countries and employs around 130,000 people. ABB has 8700 employees in Sweden and has plants at 35 locations.

In Sweden, ABB is a leading supplier of products and systems for power transmission as well as for process and industrial automation.

Västerås with around 4500 employees and Ludvika with around 2400 employees are the largest operating centers. Through its 10 business centers, ABB ensures customer proximity and customer benefits.

Application

FACTS (Flexible AC Transmission Systems) covers a wide range of technologies that increase the safety, capacity, and flexibility of power transmission networks. FACTS solutions allow network operators to increase existing network transport capacities by maintaining or improving key operating parameters for network stability. Thanks to FACTS solutions, more energy can be transmitted via existing power supplies – with minimal effect on the environment. Considerably shorter project implementation times and lower investment costs compared to the alternative, which is to lay new transmission lines or build new power stations, are also a deciding factor.

ABB is a worldwide market leader in the FACTS field and provides its international customers with a comprehensive FACTS portfolio. A subfield of FACTS are SVC (Static Var Compensator) stations for increasing network stability and reliability.

Solution

ABB Sweden benefits from the advantages of Phoenix Contact components in various ways. In addition to CLIPLINE modular terminal blocks, QUINT POWER power supply units, LAN switches, panel PCs, and plug-in systems are also used to implement FACTS applications.

During final acceptance, ABB FACTS systems have to undergo complex tests and checks. ABB uses disconnect terminal blocks in all circuits in order to implement these systems flexibly and quickly.

However, when implementing SVC stations for American Electric Power (AEP) in Texas, ABB had to take into consideration that, as per the customer specifications of AEP, modular terminal blocks with disconnect function could only be used in tripping circuits. Another AEP specification was that bridging between terminal blocks should not be implemented using cable bridges (common in the USA).

The simple solution: UT 4-MT and UT 4-TG modular terminal blocks with P-DI isolating plugs and P-FIX feed-through connectors from the CLIPLINE complete range. The tripping circuits were implemented by ABB using UT 4-MT knife disconnect terminal blocks. Other circuits in which only feed-through terminal blocks are permitted were constructed using UT 4-TG terminal blocks and P-DI isolating plugs. Following final testing of the entire SVC application, the P-DI isolating plugs from ABB were replaced with the P-FIX feed-through connectors that were snapped into the UT 4-TG disconnect point.

Summary

The tripping circuits can be opened in a defined manner for test procedures and subsequent test purposes via the UT 4-MT knife disconnect point. By replacing P-DI with P-FIX, the feed-through terminal blocks requested by end customer AEP for non-tripping circuits could be implemented quickly and safely.

The double bridge shaft in the UT series supports universal bridging via plug-in bridges. Cable bridges are therefore not required.

Other advantages include the large labeling areas of the modular terminal blocks and the universal system accessories of the CLIPLINE complete range.

PHOENIX CONTACT (Pty) Ltd.

36 Lyn Road
P.O. Box 916
ZA-Ferndale 2160
+27/11/801-8200

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