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IEEE C37.20.2-2015 pdf free

IEEE C37.20.2-2015 pdf free.IEEE Standard for Metal-Clad Switchgear.
design tests: Tests made by the manufacturer to determine the adequacy of the design of a particular type. style. or model of equipment or its component paris to meet its assigned ratings and to operate satisfactorily under normal service conditions or under special conditions, if specified, and that may be used to demonstrate compliance with applicable standards of the industry. Design tests are made on representative apparatus or prototypes to verify the validity of design analyses and calculation methods and to substantiate the ratings assigned to all other apparatus of basically the same design. These tests are not intended to be made on every design variation or to be used as part of normal production. The applicable portion of these design tests also may be used to evaluate modifications of a previous design and to determine that pcrformancc has not been adversely affected. Test data from previous similar designs also may be used for current designs, where appropriate. Once made, the tests need not be repeated unless the design is changed so as to modify perfonnance.
NOTE- Design tests are sometimes called type tests.
dummy breaker: An accessory used in metal-clad switchgear that is similar to a removable element. intended for insertion into a compartment suitable for a circuit breaker (or other primary interrupting dcvicc), but different from such a device in that the dummy element does not have any switching capability. The dummy circuit breaker has solid conductors (normally bus bars) connected between line and load side primary disconnecting devices. When installed in a circuit breaker compartment of a metal-clad switchgear section. the dummy circuit breaker connects the line and load side primary disconnecting devices of the circuit breaker compartment. Sin: dummy element.
field tests: Test made after the assembly has been installed at its place of utilization.
insulation, barrier: Insulation material used primarily to separate one item or area from another item or area within the equipment. Examples are as follows: a) interphase harriers between poles of an interrupter switch: b) bus barriers separating the bus compartment of one vertical section of switchgear from another:
and c) barriers used to shield grounded metal from electrical or thermal effects of circuit interruption within the equipment. Barrier insulation may be subdivided into two general types: Type I barriers that are not in comilaci with, and are not penetrated by. energized parts: and Type 2 barriers that are in contact with, or are penetrated by. energized parts.
insulation, bus: Insulating material used to cover primary voltage conductors except where that conductor is a cable or wire. Bus joint insulation is excluded from this category and is treated separately. The primary functions of bus insulation arc to impede arc movement and to allow closer spacing of conductors than would be possible with bare conductors. Bus insulation may also serve a secondary function as an element of the bus support insulation system.
insulation, bus joint: Insulating material used to cover joints or connections in the primary voltage conductors. Otherwise, it is similar to bus insulation.
insulation, bus support: Insulation used primarily to physically support a conductor and prevent or limit its movement under specified operating conditions. Bus support insulation includes both conductor-to- conductor and conductor-to-structure supports.IEEE C37.20.2 pdf download.

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