IEEE Std C37.30.4:2018 pdf download.IEEE Standard for Test Code for Switching and Fault Making Tests for High-Voltage Interrupter Switches, Interrupters or Interrupting Aids Used on or Attached to Switches Rated for Alternating Currents Above 1000 V.
IEEE Std C37.30.4 provides the test code for switching (except capacitive current) and fault making tests for high voltage interrupter switches, interrupters or interrupter aids for use on switches rated above 1000 V ac and used indoors, outdoors, or in enclosures for non-fault current interrupting for which an interrupting duty is assigned.
1.2 Purpose
The purpose of this standard is to provide the test code for switching and fault making tests for switching devices not covered by other standards.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
IEEE Std C37.20.2, IEEE Standard for Metal-Clad Switchgear.2.3
IEEE Std C37.20.3, IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV).
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause.
interrupter switch: A switching device, designed for making specified currents and breaking specified steady state currents.
interrupting aids:Acurrent-interrupting device that can be attached to an air switch to improve its interrupting capability (e.g., quick break arcing horns; vacuum, SF6 and expulsion interrupters).
making current: The value of the available current at the time the device closes.
outdoor switch: Switches designated for operation outside buildings or enclosures. Outdoor switches may be exposed to the weather. Outdoor switches experience no restriction of heat transfer to the ambient.
peak withstand current: The maximum instantaneous current at the major peak of an offset power frequency sinusoidal current that a switch is required to carry.
power frequency: The frequency at which a device or system is designed to operate.
quick break arcing horns: commonly referred to also as a quick break whip—a conductive member mounted such that as the main switch blade opens it remains in contact then releases and quickly creates a large open gap for improved current interruption compared to arcing horns.
short-time (symmetrical) withstand current: An abnormal power frequency current, the initial portion of which may have a dc offset, expressed in rms symmetrical amperes that a switch is required to carry.
short-time (symmetrical) withstand current duration: The maximum duration of short-time (symmetrical) withstand current that a switch is required to carry.
switch: Within this document, the noun “switch” shall refer to switching devices, interrupters, current interrupting devices, interrupting aids or interrupter switches.
visible corona: A luminous discharge due to ionization of the air surrounding a device, caused by a voltage gradient exceeding a certain critical value.IEEE Std C37.30.4 pdf download.