All standard, ventilated Jefferson Electric transformers (75 kVA and smaller) now include terminal lugs. The mechanical lugs on units from the Franklin, Wisc. company are electro-tin plated and UL listed to 90°C. Lugs are required to connection wires to the transformer terminals. Providing lugs with the transformer lets the installer complete the installation faster and eliminates having to purchase lugs separately.
Many transformers ship without lugs. The type required can change depending on the type and size of the wire. On some installations lugs may be provided on the wires. Larger transformers may be connected with a single large wire (requiring one large lug) or multiple smaller wires more easily installed with multiple lugs on a single terminal.
They support aluminum and copper wires up to a 600V connection, and have a chamfered wire entry for easy installation of wires. Lugs are attached at the factory and lug kits are also available for purchase separately to support common voltage and kVA combinations. Attachment hardware is included with kits.
Liquid-filled division Pioneer Transformer, a sister company to Jefferson Electric, produces utility transformers to step-up turbine output voltages to useful levels before distribution to the power grid. Pioneer Transformer designs and manufactures liquid-filled units up to 25 MVA at 69 kV (350 kV BIL) and is based out of Granby Quebec.
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