Buck boost dry-type transformers

When to use a buck boost transformer

• Minor voltage correction: Adjust supply voltage to match equipment requirements (e.g., 208 V supply to 230–240 V equipment).
• Type EP buck boost: Small kVA single-phase transformers with dual primary and dual secondary windings are usually connected as autotransformers by using one unit for single-phase applications, and either two or three units banked for three-phase operation.
• Space constraint: Smaller footprint and lower cost compared to isolation transformers to correct a lower or higher voltage rating.
• Motor operation: Primarily used for motor operation and should not be used for motor control circuits to correct fluctuating line voltage or to obtain a neutral on a delta system
• Lightning system: Ideally suited for use with low-voltage lighting systems, such as outdoor lighting.

When NOT to use a buck boost transformer

• Large voltage changes: Not suitable for major transformations (e.g., 120 V to 480 V).
• Unstable or fluctuating voltage: Does not regulate or stabilize varying voltages.
• Isolation requirements: Autotransformer design does not provide circuit isolation.
• Phase conversion: Can't convert single-phase to three-phase.
• Frequency mismatch: Does not alter frequency.
• Critical safety or harmonic mitigation: Not recommended for sensitive electronics needing isolation.