Control Panel Transformer VA Sizing

Size a control transformer using connected load, continuous-load allowance, and spare capacity. Results update live as you type.

Required Capacity
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Suggested Standard Size
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Secondary Current
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Included Spare Capacity
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Inputs valid. Results update live as values change.

Engineering estimate only. Verify final values against project criteria, equipment submittals, manufacturer data, measured field conditions, applicable codes, and engineering judgment.

Need help applying this tool to a controls project or commissioning issue? Contact WEBC.