The different types of switchgear assemblies, their sub-classification & the standards governing switchgear assemblies & circuit breakers:
The different types for switchgear assemblies are: indoor and outdoor. The sub-classification for the indoor is: standard, sprinkler proof, arc proof, dust proof, seismic proof, metal-clad construction vs. metal enclosed, enclosure with or without a drip hood; for the outdoor is: walk in, walk in with working area, walk-in double row, non-walk in with or without working area, enclosure for cable/bus entry or transformer throat, enclosure with thermal insulation/isle heaters and finally indoor cubicle design installed in an outdoor house.
The standards that govern circuit breakers/switchgear design testing and application are: ANSI C37 series including .09 "Test procedure for A.C. high voltage circuit breakers rated on a symmetrical current basis", .04 "Rating structure for A.C. high voltage circuit breakers rated on a symmetrical current basis", .06 "Preferred ratings and related required capabilities for A.C. high voltage circuit breakers rated on a symmetrical current basis", .20 "Switchgear assemblies", IEC 56 "High voltage A.C. circuit breakers", IEC 60 series "High voltage test techniques", IEC 694 "Common clauses for high voltage switchgear and controlgear", C22.2#31" switchgear assemblies" and CAN3-C13 "Instrument transformers.
The different types for switchgear assemblies are: indoor and outdoor. The sub-classification for the indoor is: standard, sprinkler proof, arc proof, dust proof, seismic proof, metal-clad construction vs. metal enclosed, enclosure with or without a drip hood; for the outdoor is: walk in, walk in with working area, walk-in double row, non-walk in with or without working area, enclosure for cable/bus entry or transformer throat, enclosure with thermal insulation/isle heaters and finally indoor cubicle design installed in an outdoor house.
The standards that govern circuit breakers/switchgear design testing and application are: ANSI C37 series including .09 "Test procedure for A.C. high voltage circuit breakers rated on a symmetrical current basis", .04 "Rating structure for A.C. high voltage circuit breakers rated on a symmetrical current basis", .06 "Preferred ratings and related required capabilities for A.C. high voltage circuit breakers rated on a symmetrical current basis", .20 "Switchgear assemblies", IEC 56 "High voltage A.C. circuit breakers", IEC 60 series "High voltage test techniques", IEC 694 "Common clauses for high voltage switchgear and controlgear", C22.2#31" switchgear assemblies" and CAN3-C13 "Instrument transformers.
The main parts of a low voltage (l.v.) switchgear:
The main elements for l.v. switchgear assemblies with moulded case or power (air magnetic) circuit breakers (draw-out or fixed) complete with or without integral overcurrent protection device (thermal- magnetic, solid state or microprocessor based) with or without zone interlocking provision are the cradle for drawout version only, fixed potential and control power transformers, current transformers, interframe and back barriers, main bus bars, run backs, bus risers, cable lugs (compression or mechanical), protective fuses for breaker control circuits, instrument compartments, breaker accessories, breaker lifting devices (integral with gear), fused or unfused interrupter switches, protective/monitoring/ auxiliary relays, metering devices (ammeters, voltmeters,
The main elements for l.v. switchgear assemblies with moulded case or power (air magnetic) circuit breakers (draw-out or fixed) complete with or without integral overcurrent protection device (thermal- magnetic, solid state or microprocessor based) with or without zone interlocking provision are the cradle for drawout version only, fixed potential and control power transformers, current transformers, interframe and back barriers, main bus bars, run backs, bus risers, cable lugs (compression or mechanical), protective fuses for breaker control circuits, instrument compartments, breaker accessories, breaker lifting devices (integral with gear), fused or unfused interrupter switches, protective/monitoring/ auxiliary relays, metering devices (ammeters, voltmeters,
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