Use the following information as a handy reference when selecting and applying dry type transformers within your environment.
Minimum data needed to select a transformer:
Minimum data needed to select a transformer:
- Load voltage (secondary voltage)
- Load requirement
- Three-phase (three wire or four wire)
- Single-phase (two wire or three wire)
- (load always determines phase of transformer)
- Load current (use table to convert to kVA or formula)
- Single-phase formula: Volts x Current = VA
- Three-phase formula: Volts x Current x ?3
- System voltage and frequency (primary voltage)
- Mounting location
Specific applications:
- Feeding distribution panel
- Feeding distribution panel with harmonic content
- Non-linear energy efficient transformer
- Feeding multiple distribution panels with harmonic content
- Harmonic mitigation energy efficient transformers
- Small change in voltage