{"id":38740,"date":"2026-10-10T02:45:14","date_gmt":"2026-10-10T02:45:14","guid":{"rendered":"https:\/\/dinghongtransformer.com\/?p=38740"},"modified":"2026-10-10T03:36:29","modified_gmt":"2026-10-10T03:36:29","slug":"parallel-operation-of-transformers","status":"publish","type":"post","link":"https:\/\/dinghongtransformer.com\/ru\/blog\/parallel-operation-of-transformers\/","title":{"rendered":"Parallel Operation of Transformers: Compatibility Requirements, Common Risks & Procurement Checklist"},"content":{"rendered":"

Can two transformers with the same capacity operate in parallel?<\/p>\n\n\n\n

Not necessarily.<\/p>\n\n\n\n

Parallel operation of transformers allows two or more transformers to supply a common electrical bus simultaneously. This arrangement is commonly used in industrial plants, substations, data centers, commercial facilities, and power distribution networks.<\/p>\n\n\n\n

It can increase available capacity, improve operational flexibility, and support maintenance without shutting down the entire electrical system.<\/p>\n\n\n\n

However, connecting two transformers with matching kVA ratings does not guarantee safe operation.<\/p>\n\n\n\n

Differences in voltage ratio, vector group, short-circuit impedance, tap settings, and phase sequence can cause circulating currents, uneven load sharing, overheating, and protection problems.<\/p>\n\n\n\n

DHDL’s existing technical guidance identifies these electrical characteristics as essential checks before parallel operation.<\/p>\n\n\n\n

For EPC contractors and international transformer buyers, the main question is:<\/p>\n\n\n\n

How can you confirm that a new transformer is compatible with an existing transformer before placing an order?<\/p>\n\n\n\n

This guide explains the key technical requirements, practical load-sharing calculations, common procurement mistakes, and the information buyers should include in a transformer RFQ.<\/p>\n\n\n\n

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