IEEE Std C37.20.1:2002 pdf free download

IEEE Std C37.20.1:2002 pdf free download

IEEE Std C37.20.1:2002 pdf free download.IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear.
NOTE Hare bus and conncctIon mccl the requirements of this standard. Howcs’cr. the manufacturer may proside insulated bus and or connections when required to meet dielectric requirements or as an option.
3.1.6 nw1akncloscd power stitchgcar (ME): A switchgear assembly completely enclosed on all sides and top with sheet metal (except for ventilating openings and inspection windows) containing primary power circuit switching or incrrupting devices, or both, with buses and connections. The assembly may include control and auxiliary devices. Access to the interior of the enclosure is provided by doors or removable covers, or both.
3.1.7 mechanism-operated cell switch. See. mechanism-operated contaci (MOC).
3.1.8 mechanism-operated contact (MOC): A circuit breaker mechanism-operated auxiliary switch which is mounted in the stationary housing and is operated by linkage which cooperates with the circuit breaker mechanism. Sm: mechanism-operated cell switch.
3.1.9 production tests: Tests made for quality control by the manufacturer on every device or representative samples. or on parts or materials as required to verify during production that the product meets the design specifications and applicable standards.
— Certain qualiL3 auranec tests on identified critical parts of repetitive high-production deiccs may he tcstcd on a planned statistical sampling basis.
3.1.10 switchgear: A general term covering switching and interrupting devices and their combination with associated control, instruments, metering. protective, and regulating devices; also assemblies of these devices with associated intercommnection, accessories. and supporting structures used primarily in connection with the generation, transmission, distribution, and conversion of electric power.
3.1.11 switchgear assemhh: An assembled equipment indoor or outdoor) including, but not limited to. one or more of the following categories: switching. interrupting, control, instrumentation. metering, protective, and regulating devices: together with their supporting structures, enclosures. conductors, electrical interconnections, and accessories. &‘c: Figure A in the Introduction.
3.1.12 tin-surfaced or equhalent: Metallic materials having satisfactory long-term performance that operate within the limits established for tin-surfaced electrical contact parts and conduction mechanical joints.
3.1.13 truck-operated cell switch: See: truck-operated contact (TOC).
3.1.14 truck-operated contact (TOC): A circuit breaker truck-operated auxiliary switch which is mounted in the compartment of a removable circuit breaker and is operated by the circuit breaker frame. Syn.: truck-operated cell switch.