IDMT Tripping Time Calculator

Relay tripping time calculation according to IEC 60255 and IEEE.

Relay Details


Tip: registered users can save calculations.


Introduction to Current Transformers

Current transformers (CTs) are used to convert high level currents to a smaller more reasonable level for use as inputs to protection relays and metering...

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Large Hadron Collider

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IEC 61439 - The Switchgear Standard

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Medium Voltage Switchgear Room Design Guide

Many medium voltage (MV) indoor switchgear rooms  exist worldwide. The complexity of these rooms varies considerably depending on location, function and...

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