Transformer Bushings & Terminations
Standards: IEC 60137, IEEE C57.19
Oil-impregnated paper or resin bushings for HV/LV line connections, terminal plates and cable boxes up to and beyond 550 kV.
HV RIP / RIS Condenser Bushings
Dry-type resin-impregnated paper and synthetic condenser bushings up to 1200 kV AC / 1100 kV DC.
OIP Condenser Bushings
Oil-impregnated paper condenser bushings for high-voltage power transformers.
LV High-Current DIN Bushings
DIN-type porcelain or epoxy bushings, 1–36 kV, up to several kA.
Plug-in / Elbow Bushings
Dead-break and load-break separable screened connectors for pad-mounted and GIS transformers.
Frequently asked
Oil-impregnated-paper (OIP) bushings use a vacuum-dried paper core impregnated with oil; resin-impregnated-paper (RIP) bushings use resin-impregnated paper with no free oil, making them a common, more compact choice for sealed and GIS applications.
By rated voltage and BIL (impulse withstand), rated current, creepage/pollution class, installation orientation, altitude derating and PD limits — and by compatibility with the fluid or gas above and below the bushing.
Capacitance and tan-delta (dissipation factor) drift are early signs of moisture or contamination, so monitoring taps let operators catch problems before failure.
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