The insulation system in a transformer can be categorized as follows.
• Major insulation:
– between core and low-voltage (LV) winding;
– between LV and high-voltage (HV) winding;
– between top and bottom of winding and yoke;
– between HV and tank;
– bushings.
• Minor insulation:
– between conductors;
– between turns;
– between layers;
– between laminations;
– between joints and connections.
The insulation material commonly used between the grounded core and the LV coil to ground, and also between HV and LV coils, is oil-impregnated solid pressboard.
Solid insulation, including pressboard or paper, can have small internal air voids. This reduces the insulating strength of the solid insulation as well as reducing its heat dissipation capacity. When transformer oil is used to impregnate solid insulation, the voids are filled with oil, resulting in an improvement of both the insulation strength and the heat dissipation capacity of the solid insulation.
Our transformer Insulation range includes:-
- Pre Compressed Board, High Density Permali Wood & Components
- Epoxy Fiber Glass Sheets, Rings, Supports, Dogbones, Rod, Nuts & profiles.
- Electrical Grade Insulation Paper, Epoxy Dotted Paper, Pressphan Paper
- Fiber Glass Tape, HT Tapes, Fiber Reinforced Paper Tape,
- Resin Glass Tape,
- Crepe Paper Tapes, Tubes
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