Introduction section1: general requirements
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- CONSTRUCTION
- IV.INTERNAL LAYOUT/ARRANGEMENT FAULT RATING
| REFERENCE STANDARDS
RATING OF INCOMING SUPPLY BREAKER/ISOLATOR+ (+On-load) CONSTRUCTION Mounting Degree of protection of the enclosure for installation Painting/Finish (Internal/External) Front Cover (+Neoprene) Cable Tray/Conduit entry 7.Assembly IV.INTERNAL LAYOUT/ARRANGEMENT & FAULT RATING Segregation of live parts :- Incoming supply terminals/lugs Bus bar, tap-off connections & terminals (*Separate and independent of each other) Neutral, Earth Bus-bars & Terminals Arrangement of bus-bars and tap-off connections to outgoing circuit breakers/Neutral bus-bars Rating/size of phase & neural bus-bars & terminals (at max. 50 oC ambient) |
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:BS EN 60439, BS EN 60947, IEC 439-1, BS 4293, BS 1361 & BS 88 :40A[ ]60A[ ]100A[ ] 125A [ ]................. [ ] BREAKER[ ]ISOLATOR[ ] :Wall[ ]Pedestal [ ] Surface[ ]Recessed[ ] :Indoor-IP41/42[ ] Outdoor-IP54/55[ ] .....................[ ] :Stove enamelled[ ]Epoxy[ ] Polyester[ ]Galvanized[ ] ................[ ] :Hinged[ ]Bolted[ ]Panel lock [ ] Gasketted+[ ] :Top[ ]Bottom[ ] Top & Bottom[ ] :Factory Assembled [ ] .................[ ] :Barrier[ ]Shroud[ ] Firmly secured[ ] *Separately mounted & Removable by tool[ ] :Barrier [ ] Firmly secured[ ] *Separately mounted & Removable by tool[ ] :Separately mounted with adequate working clearances/spacing from incoming supply terminals/ lugs & Outgoing terminals of MCBs/FS[ ] :Segregated for each :- Group of MCBs/TP ways[ ] ELCB Section[ ] Rigid, firmly secured, supported, direct and as short as possible[ ] Adequately sized[ ] Min. No. bolted joints[ ] Min. No. of looped Connections[ ] : Rated for max. 70 oC internal ambient, consistent with the rated incoming supply breaker/isolator[ ] Tinned electrolytic Copper[ ] |
Min. fault rating of circuit breakers
Provision of supports/facility for dressing clamping outgoing circuit cables
Operational access/convenience for Switchgear.
Incoming supply circuit breaker/isolator Outgoing Circuit Breakers
Maintenance access/replacement convenience for switchgear components
Provision for termination of PVC/SWA/PVC/XLPE/SWA/PVC Cables
ELCBs/RCCBs
10.U.V. Relays with auto-reset timer
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