SHARK® TECHNOLOGY
Connect copper and aluminum wires without removing enamel —
faster, cleaner, and more reliable.
SHARK® is an innovative, patented system developed by ERKO for connecting enameled wires in oil-filled
and dry-type transformers.
Our revolutionary technology is compatible with copper and aluminum wires, both round and rectangular,
making it the most versatile solution on the market.
Years of proven use
Connector types
Standard compliance
Revolutionary benefits that transform your transformer manufacturing process
High quality of connection
(Low resistance of connection)
Durable connection
Clean technology
(No impurity)
Emission-free technology
Simple in use
Increased efficiency
(Optimised working time)
Versatile technology
(Connecting wires of various dimensions, cross-sections, shapes and materials)
Economical technology
(Lower cost of connection)
The correct SHARK® connector and crimping die are chosen based on wire cross-section, shape (round or rectangular), and material (copper or aluminum). This ensures proper fit and reliable performance.
Enameled wires are placed inside the connector and compressed using a dedicated ERKO hydraulic or battery-powered press with matched dies. During pressing, the connector’s sharp teeth pierce through the enamel insulation and reach the conductor core.
The enamel remains around the wire except at the contact points, where metal-to-metal bonding is created. This guarantees both electrical conductivity and mechanical strength. The joint is ready for direct installation without additional steps like insulation stripping, soldering, or cleaning.
Complete range of dedicated solutions: SHARK® connectors, battery-powered presses, hydraulic heads, and full workstations – all engineered for precise and repeatable connections.
The SHARK® technology configurator is an interactive online tool by ERKO that enables quick and precise selection
of connectors for enameled winding wires (copper and aluminium). By entering basic wire parameters, the system generates the optimal connector in just a few steps – streamlining the design process and minimizing the risk of assembly errors.
