Guide to Construction of ArTu switchgear - Abb

7 Checking the overtemperature limits inside ArTuswitchgear7.4 Extracts from test certificates7.4 Extracts from test certificatesThe following pages give a series of results obtained during the heating tests.Each page contains:• a schematic drawing of the front of the switchgear with the busbar path• details of the busbars passing through (length, cross-section, current and dissipatedpower)• details of the circuit-breakers (model, size, current, dissipated power, terminals and version)• details of the cables (length, cross-section, current and dissipated power)• air temperatures measured during the test.• air temperatures calculated using the ABB DMBWin software.N. B.There are mainly the Isomax series of moulded-case circuit-breakers in the test certificatesgiven here. From the thermal point of view, switchgear to be constructed with Tmax seriesof circuit-breakers can be considered equivalent to switchgear tested with Isomax series ofcircuit-breakers of the same size and rated current.Thermal equivalence:S1 → T1S2 → T2S3 → T3S4 → T4S5 → T5Obviously, the dissipated powers to be used in the calculation of Pr (dissipated power of theswitchgear to be constructed) will be those of the circuit-breakers actually used..GENERALSTANDARDS ANDCHARACTERISTICSVERIFYING THEOVERTEMPERATURESPROTECTION AGAINSTSHORT-CIRCUIT ANDELECTRIC SHOCKSDECLARATION OFCONFORMITYCERTIFICATESPRACTICAL INDICATIONSCERTIFICATION ANDCONSTRUCTIONABB SACE Guide to Construction of ArTu switchgear 23