IEVref: 441-18-23 ID: Language: en Status: Standard Term: I2t Synonym1: Joule integral [Preferred] Synonym2: Synonym3: Symbol: Definition: the integral of the square of the current over a given time interval: ${I}^{2}t=\underset{{t}_{0}}{\overset{{t}_{1}}{\int }}{i}^{2}\mathrm{d}t$ NOTE 1 – The pre-arcing I2t is the I2t integral extended over the pre-arcing time of the fuse. NOTE 2 – The operating I2t is the I2t integral extended over the operating time of the fuse. NOTE 3 – The energy in joules liberated in one ohm of resistance in a circuit protected by a fuse is equal to the value of the operating I2t expressed in A2 • s. Publication date: 1984 Source: Replaces: Internal notes: 2017-06-02: Cleanup - Remove Attached Image 441-18-23.gif CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: