Series reference · 20 kV resin-cast dry-type options
Daqo lists both 20/0.4 kV and 20/10 kV arrangements under its SCB 20 kV family. That distinction matters before capacity or efficiency is compared: the two arrangements serve different downstream networks and have different listed insulation notation. The manufacturer publishes family choices, not a configuration map for every capacity.
Discuss this configuration
Nanjing Daqo Transformer →
CATALOGUE IDENTITY
SC(B)12 / SC(B)14 / SC(B)18- Voltage arrangements
- 20/0.4 kV or 20/10 kV
- Model families
- SC(B)12 / 14 / 18
- Capacity ranges
- 30–5,000 and 30–25,000 kVA
- Installation
- Indoor
Choose the downstream voltage first
The technical table lists two voltage arrangements and two capacity ranges. It does not explicitly map each range to a voltage arrangement or model family. Do not turn this list into a promise that every SC(B)12, 14 or 18 design is available at every rating up to 25,000 kVA.
The table gives insulation notation LI125AC50/AC5 and LI125AC50/LI75AC35. Preserve the original notation and ask the supplier to map it to each winding in the chosen voltage arrangement. The overview description alone cannot establish the complete dielectric schedule or terminal clearances of the offered transformer.
Scroll this table to read every column →
| Item | Published reference | Buyer action |
|---|---|---|
| Voltage ratios | 20/0.4 and 20/10 kV | Select the required ratio; return the network and terminal requirements. |
| Capacity | 30–5,000; 30–25,000 kVA | Ask which range applies to the chosen design. |
| Impedance | 4–10% | Request one guaranteed value, tolerance and base. |
| Connection / insulation class | Dyn11 / Yyn0; F / H | Confirm a matched configuration instead of combining options. |
Source notes: [P1]
Define the forced-air claim as a testable duty
The manufacturer advertises operation at 150% rated load under forced-air cooling. The reviewed description does not specify duration, ambient conditions, temperature-rise criteria or the base rating to which that percentage applies. It should not be used as an unconditional continuous-rating guarantee or as a reason to undersize the selected transformer.
Provide the load profile and overload duration expected in service. Ask for natural-air and forced-air ratings, fan redundancy, controller setpoints, alarm/trip contacts and the limitation when fans are unavailable. Request the thermal evidence that supports the offered duty, including the enclosure and ventilation arrangement.
The page describes vacuum-cast epoxy resin and moisture resistance. Its broad humidity and commissioning statements do not replace an assessment of condensation, contamination or ventilation at the actual indoor site. State those conditions and request installation instructions for the supplied enclosure.
Source notes: [P1]
Separate efficiency claims from a guaranteed schedule
The overview claims a 5 dB noise reduction and 5% lower no-load losses from its manufacturing approach. It does not identify a matched comparison baseline in the reviewed text. Neither claim establishes a numerical loss or noise guarantee for your selected capacity, voltage and model.
Ask the manufacturer to return no-load loss, load loss with its reference temperature, noise measurement conditions, partial-discharge requirements and the agreed test documents. Compare proposals only after these fields and the supplied package are aligned. The technical table names standards; listing them is not evidence that an individual delivered unit has passed the requested tests.
Request the selected design
Obtain a model-specific rating sheet matching capacity, ratio, connection, taps and cooling.
Check the evidence scope
Match report identity, ratings and conditions to the proposed design; record missing or different conditions.
Agree release criteria
Specify guaranteed values, tolerances, test witnesses and required reports before shipment.
Source notes: [P1]
Make the quotation match the indoor installation
Ask for final layout, terminal and cable/bus interfaces, enclosure, controller, fan package, clearances and ventilation requirements. A family product photograph and its capacity ceiling cannot define the available floor space or installation access for a particular unit.
No verified price or lead time was established. Request a dated itemized quotation for the chosen 20/0.4 or 20/10 kV arrangement, identifying accessories, tests, packing, transport and site support. Confirm currency, trade term and validity. The schedule should name the drawing-approval event and separate manufacture, tests, factory release and arrival at the stated destination.
Source notes: [P1]
Prepare a configuration-specific inquiry
Choose 20/0.4 or 20/10 kV and define the downstream network.
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Replace the brackets with your project information. This preparation tool stays in your browser; it does not submit an enquiry.
Buyer questions
Does 25,000 kVA apply to every listed model?
The table lists ranges without a complete mapping. Confirm the offered model, capacity and voltage arrangement together.
Is 150% a continuous guarantee?
The source does not define all conditions or duration. Obtain an explicit thermal rating and overload schedule for the selected package.
Can I use the 5% claim to calculate annual savings?
The source does not identify a matched baseline or selected unit values. Use current guarantees and the project duty.
Is the insulation notation the same for both ratios?
Two notations are published. Ask the maker to assign the correct winding-specific schedule to the chosen ratio.
Sources and research scope
Manufacturer material reviewed on 14 October 2026. Published facts and buyer recommendations are distinguished in the sections above. No verified current price, lead time or independent unit test was established.
View 1 research records
Current manufacturer overview plus original DOM technical table: ratios, unmapped ranges, impedance, connection and insulation options. Generic comparative and overload claims retained as claims with missing conditions.
2026-10-14 · Original browser overview and DOM technical-table text read; hidden table text separately retainedSource references and archived material are retained in the editorial record. Report a correction or provide a current datasheet →