• Robert Dansertlaan 250, 1702 Groot-Bijgaarden, Belgium

Keramiek - transformator doorvoerisolator

transformator doorvoerisolator

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

Keramiek - transformator doorvoerisolator - DIN 42530

Ceramic transformer bushings - DIN42530 - Part A

DIN42530 - Part AFor bushingFig.1234HCrAd1d2d3d4d5h1h2Weight
typekVkVkVkVmmmmmmmmmmmmmmmmmmkg
DT1-250ADT1-250A11530507060250142732505045-0,15
DT1-630ADT1-630A11530508070630224347707055-0,40
DT1-1000ADT1-1000A115305085751000325365909055-0,60
DT1-2000ADT1-2000A11530508575200044668010410455-0,80
DT1-3150ADT1-3150A115305085753150508610012512555-1,30

Ceramic transformer bushings - DIN42530 - Part B

DIN42530 - Part BFor bushingFig.1234HCrAd1d2d3d4d5h1h2Weight
DT1-250BDT1-250B1153050306025030502660202080,10
DT1-630BDT1-630B1153050307063046704185282080,20
DT1-1000BDT1-1000B1153050357510005790461103725100,40
DT1-2000BDT1-2000B11530503575200070104641255125100,50
DT1-3150BDT1-3150B11530503575315090125801506125120,65
1 - Rated Highest voltage for equipment (Um)
2 - Rated Power Frequency Withstand Voltage, wet (50 Hz, 1 min)
3 - Rated Power Frequency Withstand Voltage, dry (50 Hz, 1 min)
4 - Rated Lightning impulse withstand, dry (1.2/50 μs)
Cr - Minimum creepage length
A - Rated Current