Sola/Hevi-Duty: Drive Isolation Transformers


	Selection Table and Electrical Connections
	Operation & Maintenance Recommendations

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Drive Isolation Transformers: 7.5-440 KVA, Three Phase

Special Voltages and KVA Sizes for Drive Applications

For SCR (Silicon Control Rectifier) variable speed motor drive applications, a transformer is needed to magnetically isolate the incoming line from the motor drive. The transformer must also provide a voltage change to match the required voltage of the SCR Drive. Standard designs are delta primary and wye secondary to match the common power sources required in most three phase rectifier circuits. Hevi-Duty drive isolation transformers are specifically designed to handle the mechanical stresses, voltage demands and harmonics associated with SCR applications.

On this page: Features, Related Products, Sizing Information, Catalog Number Key, Selection Table, Design Styles, Electrical Connection Key, Electrical Connections

A printable version of the following sections is available by selecting the pdf file to the left.

Features

Available from 7.5 thru 440 KVA, 3 Phase, 60 Hz
Isolation minimizes load disturbances caused by the SCR drive
UL-3R enclosures when used with optional weather shield
Taps on all units for adjustments to incoming source voltage. Full capacity secondary neutral as required by the National Electric Code.
Shielding attenuates line to ground noise
10+2 year Sola/Hevi-Duty warranty

Related Products

Surge Suppression devices provide additional protection and longetivity to any electronic equipment.
Line Reactors
K-13 Rated Transformers for Variable Frequency Drives

Sizing Information (from Selection Table)

To properly size a drive isolation transformer, follow the drive manufacturer’s recommendations or, if you know the motor horsepower, select the proper KVA from the Selection Table.