Nuisance Tripping of Circuit Breakers (True RMS Measurements)

Nuisance tripping of circuit breakers is a common problem in many commercial and industrial installations. This Application Note explains the need to use true RMS measurement instruments when troubleshooting and analyzing the performance of a power system.

Nuisance tripping of circuit breakers is often caused by the load current being distorted by the presence of harmonic currents drawn by non-linear loads. Harmonic currents distort the current waveform and increase the load current required to deliver energy to the load. Many measurement instruments, even quite modern ones, use an averaging measurement technique that does not measure harmonic currents correctly. The readings may be as much as 40% too low, and circuit breakers and cable sizes may be underrated as a result.

True RMS meters, which take the complete distorted waveform into account, should be used instead.

Application Note Author & Publisher: Leonardo ENERGY

Source files for this application note

Related POST

Importance of Power Quality in 21st Century Grid Modernization

Technology is changing, the energy industry is changing, and today's energy customer is changing. Th..

Read more

Distributed Generation System for Power Quality Improvement

In India, where the electricity demand is escalating and with its year-on-year growth rate (i.e. dem..

Read more

POWERMAX 2017

The One and Only international events in the center of Business and Busiest city" Jakarta would be h..

Read more

E$$MEET - Pune on 24th October 2018 at ICC Trade Towers

APQI is happy to invite you for the second E$$MEET - Pune on 24th October 2018 at ICC Trade Towers. ..

Read more

Power Quality Concerns For Energy Efficient Economy

Power Quality and Reliability is the key to successful delivery of quality product and uninterrupted..

Read more

Power Quality at a Large Induction Furnace based Industry Issues on Current Harmonics and Regulations

A large Industry involved in the melting of iron for making castings and machining them uses the Ind..

Read more

13th Webinar - Smart Grid viability for Indian Distribution Companies

19th December, 2017 (Tuesday) - The electricity distribution industry is facing unprecedented arra..

Read more

17th Webinar - Regulatory and Policy Landscape around PQ for more resilient grid in 21st Century

12th June, 2018(Tuesday) - India's 21st century electricity grid is becoming smarter with the help o..

Read more
Drop us a message

You're in the right place! Just drop us a message. How can we help?

Or see contact page
There seems to be some problem with validating your request. Please try again.
Thank You! Your message has been delivered.