Distribution transformer Connecting lugs

Main Functions

• Connect power cables to transformer HV (high-voltage) and LV (low-voltage) terminals.
• Carry rated current safely with minimal voltage drop.
• Provide mechanical support for conductors.
• Facilitate installation, maintenance, and cable replacement.

Common Features

• Made from copper, aluminum, or tin-plated copper for good conductivity and corrosion resistance.
• Available in various sizes to match cable cross-sections and current ratings.
• Can be compression type, mechanical (bolted) type, or bi-metallic type (for connecting copper and aluminum conductors).
• Designed to withstand electrical, thermal, and mechanical stresses.

Typical Specifications

• Material: Copper / Aluminum / Bi-metallic
• Voltage Class: Suitable for transformer voltage rating
• Current Rating: Based on transformer capacity and cable size
• Mounting: Bolt-hole or stud connection
• Surface Finish: Tin-plated for corrosion protection

Applications

• Pole-mounted distribution transformers
• Pad-mounted transformers
• Industrial and commercial power distribution systems
• Utility substations

Example: A 100 kVA distribution transformer may use appropriately sized copper or aluminum lugs on the LV side to connect outgoing distribution cables carrying the transformer's rated load current.