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  • Transformer Short-Circuit Current and Switchgear Rating: What Buyers Should Verify Before an Upgrade

    Transformer Short-Circuit Current and Switchgear Rating: What Buyers Should Verify Before an Upgrade

    A transformer upgrade can solve one problem and create another if the downstream system is not checked carefully. A factory may replace a 1600 kVA transformer …

    Author: Hengli Engineering Desk Reading Time: 9 min

  • Transformer Impedance and Motor Starting Voltage Dip: What Factory Buyers Should Check

    Transformer Impedance and Motor Starting Voltage Dip: What Factory Buyers Should Check

    A transformer can pass routine tests, match the requested kVA rating, and still create problems when a large motor starts. The symptom is familiar in many …

    Author: Hengli Engineering Desk Reading Time: 10 min

  • When Does a Factory Need an On-Load Tap-Changing Transformer?

    When Does a Factory Need an On-Load Tap-Changing Transformer?

    A factory can have enough transformer capacity and still suffer from unstable production if voltage moves outside the operating window of its equipment. This is …

    Author: Hengli Engineering Desk Reading Time: 9 min

  • Dry-Type or Oil-Immersed Transformer? A Decision Framework for Industrial Projects

    Dry-Type or Oil-Immersed Transformer? A Decision Framework for Industrial Projects

    One of the most common questions in industrial RFQs is direct: should we choose a dry-type transformer or an oil-immersed transformer? The shortest honest …

    Author: Hengli Engineering Desk Reading Time: 10 min

  • From Temperature Rise to Service Life: What Industrial Buyers Should Watch

    From Temperature Rise to Service Life: What Industrial Buyers Should Watch

    In many transformer discussions, temperature rise appears as a line item on a test sheet. For experienced industrial teams, it is much more than that. It is an …

    Author: Hengli Reliability Group Reading Time: 8 min

  • Sizing a Distribution Transformer for a Factory with Variable Loads

    Sizing a Distribution Transformer for a Factory with Variable Loads

    When an overseas buyer first contacts a transformer supplier, the request often sounds simple: “We need a transformer for our new factory.” A day later, the …

    Author: Hengli Technical Team Reading Time: 9 min

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