Transformer Step Spacer

Transformer Step Spacer

Features: This spacer is primarily used in power transformers. It can be used long-term in transformer oil at 105°C.


Application: Widely used as insulation and support material for oil-cooled transformers.

Core Functions

Precise Positioning & Conformity: The stepped surface perfectly matches the multi-level laminated profile of the core, preventing localized stress concentration and ensuring uniform gaps between the core, clamping components, side beams, and foot pads.

Insulation Isolation: Interrupts conductive pathways between the core and metal clamping components, preventing eddy currents and partial discharges.

Mechanical Support & Vibration Damping: Transfers and evenly distributes core weight and short-circuit electrodynamic forces, enhancing overall structural rigidity;

Auxiliary Clamping: Facilitates core tightening with long bolts and clamping plates, suppressing vibration and noise.

Common Materials & Processes

Mainstream: Electrical laminated wood (multiple layers of specially treated wood veneers bonded and pressed, resistant to transformer oil, compression-resistant, and highly insulating);

Alternative materials include epoxy glass cloth boards and DMC molded plastics;

Precision milling is required to create stepped surfaces. Laminated wood is often reinforced with through bolts/connecting rods, and contact surfaces may be coated with oil-resistant epoxy adhesive to prevent loosening.

Camille