Do you always fall into traps when choosing a UPS transformer? Voltage mismatch burns out equipment, insufficient capacity makes it impossible to drive, harmonic interference ruins the load... Many people blindly choose based on "power", but ignore the key matching points!

This super practical guide + Leilang appliance compatibility plan, even beginners can easily choose the right one, saving both time and money

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✅ First step: First understand the type of UPS, and then determine the transformer requirements

Not all UPS systems need to be equipped with transformers! First, match yourself. Lei Lang has already classified it for you:

🔹 power frequency UPS: It requires dual transformers for rectification and output. The Leilang customized model comes with a three-in-one function of "voltage adaptation + isolation + harmonic suppression", and no additional accessories are needed

🔹 high-frequency UPS: no built-in transformer? The Leilang external isolation transformer is plug-and-play, specifically designed for sensitive loads such as medical devices and servers. It can prevent interference simply by plugging it in

🔹 Standby UPS: No need to worry about small power below 10kVA. The Leilang mini isolation model is small in size and does not take up much space. High-power models can also be customized as needed

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🔌 Step 2: Voltage matching is the bottom line. If wrong, burn the equipment directly

Focus on the voltages of the "power grid side (primary side)" and the "UPS/load side (secondary side)". Leilang covers all scenarios:

Home/Office (single-phase) : Grid 220V→ Raylang 220V/311V dual-output model, suitable for direct use with computers and printers

Industrial/data center (three-phase) : Grid 380V→ Raylang 380V same voltage isolation type, universal for rectifier and load ends

High-voltage industrial scenarios: 10kV/6kV power grid → Leilang 10kV/0.4kV step-down transformer, directly compatible with low-voltage UPS

⚠️ Large voltage fluctuation? The model of Leilang with ±10% adjustable taps is extremely considerate. It precisely compensates for fluctuations, and you no longer need to worry about frequent power outages of the UPS

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📊 step 3: capacity calculation is super simple. Remember this formula

Transformer capacity (kVA) = Maximum load power (kW) ÷ Load power factor ÷ 0.8 (optimal load rate)

For instance: An 80kW server (power factor 0.8) → 80÷0.8÷0.8=125kVA. Choosing the Leilang 125kVA power frequency matching model is the right choice!

💡 with motor/air conditioning (impact load)? The capacity of the Leilang transformer can be customized as needed. It does not trip during startup and is highly practical in industrial scenarios

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🔗 Step 4: The wiring method is mysterious. Harmonics/grounding all depend on it

For three-phase UPS, "Dyn11" is preferred! The third harmonic is directly suppressed, and the THDi drops from 30% to below 5%.

Hypersensitive loads such as medical/MRI? Select "Zyn11", the zero-ground voltage is less than 1V, and the device does not interfere.

Office low power? "Yyn0" is sufficient, with low cost and simplicity.

📦 Common capacity quick reference table, Leilang in stock, no need to wait

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Load type

Common capacity (kVA

Features of the Leilang compatible model

Home/Office

Computer/Printer/monitoring

1, 2, 3, 5, 10

Mini size, silent operation

Data center

Server/Switch

10, 20, 30, 50, 100, 125

High heat dissipation design ensures no overheating even under full load for 24 hours

Industrial workshop

Motor/frequency converter/PLC

50, 100, 200, 315, 500

Shock-resistant, no tripping when the starting current is three times

Hospital

MRI/ICU equipment

10, 20, 30, 50, 100

Zero-ground voltage < 1V, complete medical certification

⚠️ 3 tips to avoid pitfalls

Reserve 10% to 20% of the capacity. There is no need to replace it when adding loads later

Comprehensive certification: The entire series of Leilang UPS transformers have passed GB/IEC certification, ensuring top-notch quality

Complex environment adaptation: For high-temperature workshops, choose the Raylang F/H class insulation type. For humid environments, use the Raylang moisture-proof and sealed type. It can also be used in coastal areas or basements

Have you chosen the right UPS transformer? In the comment section, please tell us whether it's for household, industrial or medical use. I'll help you figure out the specific model!