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Transformer Differential Protection (87T) Inrush Trip

popeye21834
popeye21834
Published September 29, 2026
Transformer Differential Protection (87T) Inrush Trip
Ref: Plant Equipment Specification • ISHRAE / ASHRAE Standards MEP Technical Asset

A 2000 kVA 11kV/415V dry-type transformer trips on 87T differential protection during no-load energization from the grid. How do we configure harmonic restraint?

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popeye21834

popeye21834

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Chartered Senior MEP Engineer & Review Board Specialist with extensive design, testing, and commissioning field experience across commercial and industrial infrastructure.

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