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Keramische steunisolatoren voor hoge temperatuur

Keramische steunisolatoren voor hoge temperatuur – documentatie pagina
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Keramische steunisolatoren voor hoge temperatuur

Ceramic / porcelain material

Ceramic groupCeramic groupCeramic groupCeramic group
Sub-GroupC-110C-120C-130C-221
Silicious
Porcelain
Aluminous porcelain
Standard strength
Aluminous porcelain
High strength
Steatite low/loss
angle
PropertiesPropertiesPropertiesSymbolsUnitsAL2O3
<30%
AL2O3
30-50%
AL2O3
>50%
Apparent prosity (open)max.max.PaVolume %0.00.00.00.0
Bulk densitymin.min.δag/cm32,22,32,52,7
Flexural strengthmin.unglazedRfN/mm25090140140
min.glazedRfN/mm260110160-
Modulus of elasticityminEGPa6070100100
Mean coefficient linear expansionα 20-100°C10-6K-13-63-64-76-8
α 20-300°C10-6K-13-63-65-77-9
α 20-600°C10-6K-14-75-75-78-9
Specific heat capacity20°-100°CcpJ/kgK750÷900750÷900750÷900790÷920
Thermal conductivity20°-100°CλW/mK1÷2,51,2÷2,61,5÷4,02,3÷2,8
Resistance to thermal shockmin.ΔtK150150150100
Electric strengthmin.EdkV/mm20202020
Withstand voltagemin.UkV30303030
Relative permittivity48÷62 Hzεr6÷76÷76÷7,56
Dissipational 20°Cmax.48÷62 Hztanδ10-32525301,5
max.1 kHztanδ10-3----
max.1 MHztanδ10-31212151,2
Volume resistivity in terms of temperaturemin.20°CρvΩcm1013101310131012
min.200°CρvΩcm1081081081011
min.600°CρvΩcm104104104107
Temperature corresponding to a volume resistivitymin.100 MΩcmtK100°C200200200500
min.1 MΩcmtK1°C350350350800
For post insulators, hot-dip galvanized cast iron flanges assembled or with :
Sulphur cement = excellent mechanical performances and max use temperature 90°C - Reduced assembly time
Portland cement = max use temperature 200°C - Drying time in mould is longer

Keramische laagspanning steunisolatoren

Ceramic stand off insulator for high temperatures

Ref.TypeInsertmaterial12HØCr.MLN1N2N3N4TTWeight
kVkVmmmmmmNNNmNNNmgr
BG25-M6IS312024400Nickel brass12252834≥ 751200≥ 18≥ 3000≥ 5000640
BG35-M6IS312025200Nickel brass17353665≥ 150≥ 1600≥ 35≥ 6000≥ 10000675
BG35-M8IS312023600Nickel brass17353665≥ 150≥ 1600≥ 35≥ 6000≥ 100001875
BG50-M10IS312022600Nickel brass29505095≥ 275≥ 3600≥ 80≥ 11000≥ 2000032220
BG50-M12IS312022800Nickel brass29505095≥ 275≥ 3600≥ 80≥ 11000≥ 2000055220
BG60-M10IS312025600Nickel brass326060120≥ 400≥ 6000≥ 140≥ 16000≥ 2500032460
BG60-M12IS312020200Nickel brass326060120≥ 400≥ 6000≥ 140≥ 16000≥ 2500055460
BG60-M14IS312024600Nickel brass326060120≥ 400≥ 6000≥ 140≥ 16000≥ 2500090460
BG60-M16IS312024800Nickel brass326060120≥ 400≥ 6000≥ 140≥ 16000≥ 25000125460
BS60-M14IS3120238Nickel brass3260110165≥ 400≥ 6500 ≥ 160≥ 16000≥ 2500090195
BS60-M16IS3120240Nickel brass3260110165≥ 400≥ 6500 ≥ 160≥ 16000≥ 25000125195
1 - Rated insulation Voltage Ui in function of Pollution degree and Overvoltage (Check IEC 60077-1)
2 - Rated Power Frequency Withstand Voltage, dry (50 Hz, 1 min)
Cr - Creepage distance
ML - Maximum load acc to test condtions required by EN 61373
N1 - Flexural strength
N2 - Torsion rupture torque
N3 - Maximum tensile strength
N4 - Compressive strength
TT - Max tigthening torque on threads