Decoding the SCB18-2000/10 Dry-Type Transformer

In power distribution, building power supply, and industrial projects, the code SCB18-2000/10 frequently appears on specification sheets. It represents one of the most popular dry-type transformers on the market today – balancing energy efficiency, safety, and reliability.

 

Yet many electrical professionals are not fully confident in interpreting every letter and number. This article breaks down the SCB18-2000/10 step by step and provides practical background for better selection decisions.

 

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✅ S: Three-phaseIt indicates a three-phase transformer, the mainstream configuration in the current power transmission and distribution system. It is applicable to most industrial and building power distribution scenarios with higher stability.

 

✅ C: Epoxy resin cast moldingThis is the core manufacturing process of dry-type transformers. The windings are integrally cast and solidified with epoxy resin. It features moisture resistance, flame retardancy, fireproof performance and zero pollution. No oil medium is required; it is safe and eco-friendly, and can be directly installed in enclosed spaces such as indoors and basements.

 

✅ B: Copper foil windingHigh-quality copper foil is adopted for winding production. Compared with traditional copper wire windings, it delivers better electrical conductivity and lower load loss, with a more compact winding structure. Its heat dissipation performance and mechanical strength are greatly improved, enabling more energy-saving and durable operation.

 

✅ 18: Design serial numberIt stands for the technical iteration version number of the transformer. The larger the number, the more advanced the product's technical level, energy-saving performance and manufacturing process. SCB18 is a new-generation low-loss dry-type transformer with a higher energy efficiency grade.

 

✅ 2000: Rated capacityThe rated capacity is 2000kVA, which directly determines the load-carrying capacity of the transformer. It can meet the power load demands of medium and small factories, high-rise buildings, commercial complexes, residential communities and other scenarios.

 

✅ 10: High-voltage side rated voltageThe rated voltage of the high-voltage side is 10kV, which perfectly matches China's mainstream 10kV distribution network system and is the most commonly used voltage level for urban-rural power distribution and industrial power supply.

 

 

Many engineers specify only the type code. For a complete, safe selection, also verify:

 

Insulation Class & Temperature Rise Limit
SCB18 typically uses Class H (180°C) or Class C (220°C) insulation. But the temperature rise limit must be stated clearly: common values are 100K (Class F) or 120K (Class H). For energy‑efficient projects, insist on 100K rise + Grade 1 efficiency.

 

Enclosure Protection (IP Rating)

• Indoor, clean environment → enclosure optional
• Basements or risk of contact → IP20 (solid objects >12 mm)
• Outdoor or dusty/humid → IP23 (water spray) or higher

Remember: enclosures reduce heat dissipation – derating or forced ventilation may be needed.

 

Temperature Controller & Fan Cooling
Dry‑type transformers come with a standard thermostat (e.g., BWDK series) and bottom‑mounted fans. Forced air cooling (AF) can increase short‑term overload capacity by 30–50%, but long‑term use requires checking fan lifetime and noise levels.

 

Vector Group
Common choice: Dyn11 (delta primary, star secondary with neutral) – excellent for unbalanced loads.
Some specifications ask for Yyn0, but this is not recommended when significant single‑phase loads are present.

 

Project Type	Recommended?	Key Reason
High‑rise office buildings	✅ Yes	Fire safety, can be placed in electrical shafts or basements
Large shopping malls / hospitals	✅ Strongly recommended	Low noise, environmentally friendly, safe for unattended operation
Data centre (initial modules)	✅ Optional	2000 kVA supports ~800–1200 kW IT load
Industrial park substations	✅ Mainstream choice	High efficiency → significant long‑term electricity savings
Wind / solar skid‑mount substations	❌ Not recommended	Outdoor/corrosive environment – oil‑filled or specially coated dry type required
Temporary construction power	❌ Not recommended	Higher cost, sensitive to dust

 

 

SCB18-2000/10 = Three‑phase + cast resin + copper foil winding + 18th‑generation high efficiency + 2000 kVA + 10 kV high‑voltage side
It is a fire‑safe, energy‑efficient, compact dry‑type transformer – ideal for modern building and industrial power distribution.

Knowing the code is the first step; understanding the engineering logic behind each parameter is what enables safe, economical, and high‑performing transformer selection.

 

If you are selecting a transformer for a specific project – share the system voltage, load profile, and installation environment – and we can discuss further.

 

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What is a 2000kVA dry-type transformer?

The 2000kVA Dry-Type Transformer from NPC Electric is engineered for high efficiency and reliability in demanding industrial and commercial applications. It features advanced solid insulation technology, eliminating the need for oil, which reduces maintenance and environmental concerns.

 

What is the maximum load for a dry type transformer?

According to ANSI standards, these transformers can sustain 200% of their nameplate load for a duration of one-half hour, 150% load for one hour, and 125% load for four hours, as long as a constant 50% load precedes and follows the overload. It is essential to refer to ANSI C57.

 

Which is better, an oil type or dry type transformer?

Oil immersed transformers are generally preferred for outdoor installations and high-capacity industrial applications because they offer better cooling efficiency, stronger overload capability, and longer service life. Dry type transformers are usually selected for indoor use because they provide better fire safety, lower environmental risk, and simpler maintenance.

 

What is the service life of a 2000 kVA transformer?

Under proper operating conditions and regular maintenance, a high-quality 2000 kVA transformer can operate reliably for 25 to 40 years. Periodic inspections, oil testing, temperature monitoring, and preventive maintenance help maximize transformer lifespan.