Conditional short-circuit current

Conditional short-circuit current is defined as the value of the alternating current (a.c) component of a prospective current, which a switch without integral short-circuit protection, but protected by a suitable short circuit protective device (SCPD) in series, can withstand under specified conditions of use and behaviour integral of the square of the current over a given time interval (t₀,t₁) The IEC^[1] definition is critiqued to be open to interpretation^[2].

$I^{2}t=\int _{t_{0}}^{t_{1}}i^{2}(t)dt$

References

^ IEC 62314-1, The International Standard on Solid-State Relays, Ed 1, Section 3.1.11
^ Digital Protective Relays: Problems and Solutions, Vladimir Gurevich, CRC Press, 1 edition, 2001, Sec 10.3.2.6 Page 360, ISBN 978-1439837856

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[1] IEC 62314-1, The International Standard on Solid-State Relays, Ed 1, Section 3.1.11

[2] Digital Protective Relays: Problems and Solutions, Vladimir Gurevich, CRC Press, 1 edition, 2001, Sec 10.3.2.6 Page 360, ISBN 978-1439837856

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