{}

Our Brand

{"support":{"yesButton":"yes","noButton":"no","feedback":{"title":"What can we do to improve?"},"submitButton":"Submit","successMessage":"Thank you for your feedback","title":"Did this answer your question?","feedbackPercentLabel":"of people found this helpful","captcha":{"error":"Please tick the box"}}}

Search FAQs

{"searchBar":{"inputPlaceholder":"Search by keyword or ask a question","searchBtn":"Search","error":"Please enter a keyword to search"}}

Max Short-circuit current of Silcon in Battery Operation

"


Electrical regulations require a UPS to be able to deliver a sufficient current to clear Fuses or MCB’s in the event of a short circuit on the output.

When the system is online this is not an issue as system switches to bypass until fault is cleared, but in battery operation there is a current limiter which limits the current to 150% and this would not necessarily be sufficient for the to trip the required protection in the specified time. However we also specify a subcycle 300% current limit for fault clearing for the Silcon.

This means that 300% of the max rated current will be supplied for up to 20 mil.sec. (0.02 Sec) If the MCB or Fuse is selected correctly, this will be sufficient to clear the MCB / Fuse.

"
Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.

Can't find what you are looking for?

Reach out to our Customer Care team to receive information on technical support, assistance for complaints and more.