go to the Service product page Anonymous asked on Jan 27th, 2015 in Service

While checking the main contact resistance we found that a few of the values across one of the breaking chambers are higher than expected. What is your recommendations?

Herb Rogers, Head of High-voltage Service

ABB's answer

We normally allow up to 2000 Microohms in a filter application. If the contact resistance has a high value, it´s due to powder contamination and sometimes you can use a higher current level to measure correct resistance levels. Another option is to operate the breaker 30 times without any load on the breaker, that cleans up the contact path.

Like this answer 1 person liked it already!

0 Comments

or
Submit comment cancel

Area expert

  • Herb Rogers

    Herb Rogers

    Head of High-voltage Service

    High Voltage Products

Contact ABB

If you want to purchase a product, need any pricing information or need help or support from ABB, please contact your local partner.

Haven't found what you've been looking for?

or Ask a question or Contact ABB

ABB's website uses cookies. By staying here you are agreeing to our use of cookies. Learn more