Trihal cast resin dry type transformers (ENG) - Trinet

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TrihalinstallationStandard LV connections from above (1). Trihal with IP31 metal enclosure standard HV and LV connections (figures 1and 2)- the outgoing (or incoming) LV conductorsmust go upwards from the terminals under theenclosure cover.- the LV conductors should never pass betweenthe HV coils and the enclosure.- the outgoing (or incoming) HV conductors canpass above (figure 1) or below (figure 2). HV connection from below- the outgoing (or incoming) HV conductors cancome from below directly to the connectionterminal (figure 2). In this case incomingconductors are passed through the removableflap door located at the bottom on theright HV side.- the HV cables must be fastened inside theenclosure on the HV side panel. Two blankedoff holes with screw nut system are providedfor fitting cables inside the enclosure on theHV side (figure 2) (the fixing system is not suppliedby France Transfo).It is advisable to verify the feasibility of thistype of connection in relation to the sectionand the bending radius of cables and thespace available in the enclosure. HV connection by plug in connector (figure 3)figure 1 - standard HV and LV connectionsfrom abovecable supportLVnHVcable supportHV connections from above with plug-inconnectors (1) (option).Warning:It is necessary to verify conformity with theIP31 protection index after having drilled theinsulation gland plate for HV, LV and otherconnections (thermal protection…)figure 2 - standard HV connection from belowHVHV and LV connections from above.figure 3 - HV connections with plug inconnectors (option)LVHVcable supportcable support(1) by removing dismantled panels of the enclosure.France Transfo13
Trihaloverloadsadmissible temporaryoverloads for daily load cycleacceptable short timeoverloadsgeneral informationThe transformers are designed to operate atrated power at ambient temperature defined byIEC 76:- maximum : 40 Deg.C- daily average : 30 Deg.C- yearly average : 20 Deg.Cannual ambient temperature+ 10 Deg.C150140120100% of rated power0.80.22 4 6 8 10 12hoursrated current multiplex In1086420.80.70.5510 30 60 secondsWithout particular specification, the referencetemperature is the annual average of 20°C. overloads are allowed without reducing thetransformer’s service life if they are compensatedby a normal load below the rated power.K load =rated powerThe admissible overloads are also subject to theaverage mean ambient temperature.The 1st column gives the cyclical daily overloads.The 2nd column indicates the acceptable shorttime overloads. the figure below shows the acceptableconstant load as a function of the average temperaturecompatible with normal life duration.% of rated powerrated current multiplex Inpermanent load as a percentageof rated powerannual ambienttemperature1501401201000.80.21086420.90.80.70.512011010090x – 30¡ x – 20¡ x – 10¡ x x + 10¡ambiant temperature in Deg. C(x = annual average temperature)2 4 6 8 10 12% of rated powerhours510 30 60rated current multipleseconds one can operate a transformer designed foroperation in ambient of 40 Deg.C at higher temperaturesby reducing the rating as shown in thetable.annual ambient temperature– 10 Deg.C15014012010010.60.2108642x In10.90.80.70.5maximumadmissibleambient temperature load20°C P25°C 0.97 x P30°C 0.94 x P35°C 0.90 x P2 4 6 8 10 12hours510 30 60 seconds14France Transfo
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Trihal cast resin dry type transformers (ENG) - Trinet

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