IEEE C37.20.4-1996 pdf download IEEE Trial-Use Standard for Indoor AC Switches (1 kV–38 kV) for Use in Metal- Enclosed Switchgear
1.Scope
This standard covers indoor ac medium-voltage switches for use in enclosures for application in power circuits atvoltages above 1 kV through 38 kV as follows:
a)Stationary or drawout
b)Manual or power operation
C)Fused or unfused
The term indoor is intended to indicate that the enclosure provides a degree of protection to the switch and theenclosure may be suitable for indoor, outdoor, or other service conditions and complies with the requirements otswitchgear assemblies as defined by IEEE Std C37.20.2-1993 ‘ or IEEE Std C37,20.3-1996
This standard does not apply to subsurface load interrupting switches in IEEE Std C37.71-1984, switches intended foruse in padmounted switchgear in ANSI C37.72-1987 and IEEE PC37.73, and to high-voltage air switches in IEEE StdC37.30-1992.
NOTES:
Within this standard, the word “switch(es) shall be considered to mean enclosed, indoor, three-phase, ac medium-voltageswitch(es) as defined by this scope.
There are switch designs that have short-circuit current interrupting capability, and these devices are covered by this standard6only to the extent of meeting the listed testing requirements. However, due to the additional capability, additional testing isrequired and the manufacturers should be consulted.
2. References
When the standards referenced in this document are superseded by a revision approved by the issuing authority, thelatest revision shall apply, except as noted for IEEE Std 4-1978.
ANSI C37.22/D7, Preferred Ratings for Indoor Medium-Voltage Switches and Drawout Medium Voltage CircuitBreakers Used in Enclosures.^
ANSI C37.57-1990American National Standard for Switchgcar–Metal Enclosed Interrupter SwitchgcarAssemblies-Conformance Testing.”
ANSI C37.58-1990, American National Standard for Switchgcar–Indoor AC Medium-Voltage Switches for Use inMetal-Enclosed Switchgcar-Conformance Test Procedures
ANSI C37.72-1987.American National Standard for Manually-Operated, Dead-Front, Padmounted Switchgcar withiLoad-Interrupting Switches and Separable Connectors for Alternating-Current Systems.
ANSINFPA 70B-1994.Electrical Equipment Maintenance.
IEEE Std 1-1986 (R1992), EEE Standard General Principles for Temperature Limits in the Rating of ElectricEquipment and for the Evaluation of Electrical Insulation (ANSI).
IEEE Std 4-1978, IEEE Standard Techniques For High-Voltage Testing (ANSI).6
EEE SI C37.09-1979 (R1988), IEEE Standard Test Procedure for AC Hieh-Votage Circuit Breakers Rated on aSymmetrical Current Basis (ANSIDoD)
IEEE Std C37.20.2-1993,1EEE Standard for Metal-Clad and Station-Type Cubicle Switchgear (ANSI)
IEEE Std C37.20.3-1996, EEE Standard for Metal-Enclosed Interrupter Switchgear (ANSI)
IEEE Std C37.30-1992, IEEE Standard Requirements for High-Voltage Air Switches (ANSI)
IEEE Std C37.40-1993,IEEE Standard Service Conditions and Definitions for High-Voltage Fuses, DistributionEnclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Accessories (ANSI).
IEEE Std C37.4-1994,IEEE Standard Design Tests for High-Voltage Fuses, Distribution Enclosed Single-Polc AirSwitches, Fuse Disconnecting Switches, and Accessories (ANSI).
IEEE Std C37.48-1988 (R1992), EEE Guide for Application, Operation, and Maintenance of High-Voltage FuscsDistribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Accessories (ANSI).
IEEE Std C37.71-1984 (R1990), IEEE Standard for Three-Phase, Manually Operated Subsurface Load InterruptingSwitches for AC Systems (ANSI).
IEEE C37.20.4-1996 pdf download
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