Dry-type Transformer
SC(B)18 Dry-Type Transformer 30~2500kVA (GB 20052-2024 Grade-1 Energy Efficiency NX1)
SC(B)18 Dry-Type Transformer (30~2500kVA · Grade-1 Efficiency)
Product Overview
The SC(B)18 dry-type transformer is an energy-saving product meeting Grade-1 (NX1) efficiency under GB 20052-2024, with epoxy-resin vacuum cast insulation. It offers strong short-circuit withstand, low maintenance, high operating efficiency, compact size and low noise. Widely used in fire- and explosion-critical sites — safe, fireproof and pollution-free, suitable for direct connection to heavy loads. The preferred choice for 10kV distribution energy-saving retrofits and new projects.
Model Designation
| S | G / C | (B) | 18 | □ / □ | NX1 |
|---|---|---|---|---|---|
| Three-phase | G: non-encapsulated (Class H) C: epoxy-resin cast | LV foil winding optional | Performance code | Rated kVA / Voltage class kV | Efficiency grade (Grade 1) |
Key Features
- Grade-1 efficiency, safe & fireproof: meets GB 20052-2024 Grade-1 efficiency; strong short-circuit withstand, low maintenance, high efficiency; ideal for fire/explosion-critical sites — safe, fireproof, pollution-free, directly usable for heavy loads;
- Advanced technology, high reliability: domestically advanced technology — high mechanical strength, strong short-circuit withstand, low partial discharge, good thermal stability, long service life;
- Low loss, low noise: obvious energy savings, maintenance-free;
- Superior cooling & overload: short-time overload operation under forced-air cooling;
- Moisture-resistant: operates in humid, harsh environments;
- Intelligent temperature control: complete temperature monitoring and protection system — intelligent controllers auto-scan and display the temperature of all three phase windings, start/stop fans automatically, with alarm and trip functions;
- Compact & economical: small structure, light weight, small footprint, low installation cost.
Main Performance Parameters — SC(B)18 Dry-Type Transformer Series
| Model | Rated Power (kVA) | Vector Group | Voltage Combination (kV) | No-load Loss (W) | Load Loss (W) 120℃ (F) | No-load Current (%) | Short-circuit Impedance (%) | ||
|---|---|---|---|---|---|---|---|---|---|
| HV | Tap Range | LV | |||||||
| SC(B)18-30 | 30 | Yyn0 or Dyn11 | 6 / 6.3 / 6.6 / 10 / 10.5 / 11 | ±2.5% ±5% | 0.4 | 105 | 640 | 2 | 4 |
| SC(B)18-50 | 50 | 155 | 900 | 2 | |||||
| SC(B)18-80 | 80 | 210 | 1240 | 1.5 | |||||
| SC(B)18-100 | 100 | 230 | 1415 | 1.5 | |||||
| SC(B)18-125 | 125 | 270 | 1665 | 1.3 | |||||
| SC(B)18-160 | 160 | 310 | 1915 | 1.3 | |||||
| SC(B)18-200 | 200 | 360 | 2275 | 1.1 | |||||
| SC(B)18-250 | 250 | ±2×2.5% ±5% | 415 | 2485 | 0.9 | 6~8 | |||
| SC(B)18-315 | 315 | 510 | 3125 | 0.8 | |||||
| SC(B)18-400 | 400 | 570 | 3590 | 0.8 | |||||
| SC(B)18-500 | 500 | 670 | 4390 | 0.8 | |||||
| SC(B)18-630 | 630 | 775 | 5290 | 0.7 | |||||
| SC(B)18-630* | 630 | 750 | 5365 | 0.7 | |||||
| SC(B)18-800 | 800 | 875 | 6265 | 0.7 | |||||
| SC(B)18-1000 | 1000 | 1020 | 7315 | 0.7 | |||||
| SC(B)18-1250 | 1250 | 1205 | 8720 | 0.7 | |||||
| Model | Rated Power (kVA) | No-load Loss (W) | Load Loss (W) 120℃ (F) | No-load Current (%) |
|---|---|---|---|---|
| SC(B)18-1600 | 1600 | 1415 | 10555 | 0.6 |
| SC(B)18-2000 | 2000 | 1760 | 13005 | 0.6 |
| SC(B)18-2500 | 2500 | 2080 | 15445 | 0.6 |
Note: two 630kVA variants exist (different losses); the * denotes the low-loss version — name them per your own product lineup. The last three ratings share the same vector group / voltage combination as the main table.
Typical Applications
| Sector | Description |
|---|---|
| Power Stations / Nuclear Stations | Distribution and auxiliary power for high-reliability sites |
| Factories / Chemical Plants | Fire- and explosion-critical, oil-free and maintenance-free |
| Hospitals / Airports / Tunnels | Low noise, safe, continuous supply for critical loads |
| Commercial Buildings / Municipal | Grade-1 efficiency cuts long-term electricity cost — a plus for green building ratings |
Why Choose XD?
With years of transformer manufacturing and export experience, XD delivers products worldwide with complete type-test reports and international certifications. Capacity, impedance and efficiency class can be customized to IEC/ANSI/GB standards and project conditions, with OEM/ODM service and full export documentation support. Send us your load profile — our engineers will provide the optimal selection with a payback estimate.
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Contact Us
Contact: Tianjin Delda Trading Co., Ltd
WhatsApp: +86 13662056855
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E-mail: solomon20210701@tjxddq.com
Add: Unit‑101, Workshop 3, Bozhong Automobile Industrial Park, No.5 Xianghui Road, Intersection of Xianghui Road and Gaoying Road, Beizhakou Town, Jinnan District, Tianjin, China