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20KV Indoor Dry-type Power Transformer
  • 20KV Indoor Dry-type Power Transformer20KV Indoor Dry-type Power Transformer
  • 20KV Indoor Dry-type Power Transformer20KV Indoor Dry-type Power Transformer
  • 20KV Indoor Dry-type Power Transformer20KV Indoor Dry-type Power Transformer
  • 20KV Indoor Dry-type Power Transformer20KV Indoor Dry-type Power Transformer

20KV Indoor Dry-type Power Transformer

As a specialized manufacturer and supplier in China, Wzonpa’s 20kV Indoor Dry-type Power Transformer features stable arc-extinguishing performance and exceptionally high insulation strength, while ensuring stable operation even in harsh outdoor environments. Thanks to its compact design, minimal maintenance requirements, and exceptionally long service life, it guarantees robust protection for power systems and demonstrates excellent adaptability to extreme weather conditions.
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As a trusted China manufacturer, Wzonpa delivers the 20KV Indoor Dry-type Power Transformer designed for safe, efficient, and maintenance-free power distribution in critical environments. This transformer converts high-voltage electricity into usable low-voltage power while ensuring stable performance, low losses, and enhanced fire safety.


The 20KV Indoor Dry-type Power Transformer is engineered with advanced insulation systems, including Nomex and epoxy resin encapsulation, making it highly resistant to moisture, pollution, and harsh environmental conditions.


Core Advantages and Key Features

1.High Safety & Fire Resistance

Flame-retardant materials eliminate fire hazards

Oil-free design avoids leakage and environmental risks

Suitable for installation in densely populated areas


2.Excellent Energy Efficiency

Low no-load and load losses reduce operational costs

Optimized silicon steel core minimizes energy waste

The 20KV Indoor Dry-type Power Transformer ensures long-term energy savings


3.Strong Environmental Adaptability

Operates reliably in 100% humidity

Resistant to corrosion in coastal or industrial zones

Performs well in temperatures from -30℃ to +40℃


4.Advanced Thermal & Protection System

Equipped with BWDK temperature monitoring system

Real-time thermal detection with alarm and trip functions

Ensures safe and continuous operation


Structural Design Highlights

Core Construction

High-permeability grain-oriented silicon steel

45° step-lap design reduces noise and losses

Anti-rust coating enhances durability


Foil Winding Technology

Copper foil winding improves short-circuit strength

Better heat dissipation compared to traditional wire winding

Resin sealing protects against moisture and contamination


Applications and Use Cases

The 20KV Indoor Dry-type Power Transformer is widely used in:

High-rise commercial buildings

Hospitals and medical centers

Airports and transportation hubs

Power plants and substations

Petrochemical and industrial facilities

These scenarios demand high safety, low maintenance, and uninterrupted power supply.


Why Choose Wzonpa?

Competitive Advantages

Direct factory supply ensures cost efficiency

Strong R&D capability with proven engineering experience

Customization available for diverse project requirements

The 20KV Indoor Dry-type Power Transformer demonstrates industry-leading reliability


Service & Support

Professional technical consultation before purchase

Fast delivery and global logistics support

Comprehensive after-sales service and guidance

Long-term maintenance and spare parts availability


Technical parameters

1.Technical parameters of SC(B)10 series 20KV grade non-excitation voltage regulating distribution dry type transformer

RatedcapacitykVA Voltage tap range Connectionsymbol No-load losskW Load loss kW No-loadcurrent% Short-circuitimpedance%
HVkV HV tap range % LVkV 130℃(B)(100°C) 155℃(F)(120°C) 180℃(H)(145°C)
50 202224 ±2.5±5 0.4 Dyn11Yyn0 0.34 1.16 1.23 1.31 2.00 6
100 0.54 1.87 1.99 2.13 1.80
160 0.67 2.33 2.47 2.64 1.50
200 0.73 2.77 2.94 3.14 1.50
250 ×2.5±5 0.84 3.22 3.42 3.66 1.30
315 0.97 3.85 4.08 4.36 1.30
400 1.15 4.65 4.84 5.18 1.10
500 1.35 5.46 5.79 6.19 1.10
630 1.53 6.45 6.84 7.32 1.00
800 1.75 7.79 8.26 8.84 1.00
1000 2.07 9.22 9.78 10.4 0.85
1250 2.38 10.8 11.5 12.3 0.85
1600 2.79 13 13.8 14.8 0.85
2000 3.24 15.4 16.3 17.5 0.70
2500 3.87 18.2 19.3 20.7 0.70
2000 3.24 16.8 17.8 19.1 0.70 8
2500 3.87 20 21.2 22.7 0.70


2.Technical parameters of SC(B)11 series 20KV grade non-excitation voltage regulating distribution dry type transformer

RatdcapacitykVA Voltage tap range Connectionsymbol No-load losskW Load loss kW No-loadcurrent % Short-circuitimpedance %
HVkV HV tap range% LVkV 130℃(B)(100℃) 155℃(F)(120℃) 180℃(H)(145℃)
50 202224 ±2.5±5 0.4 Dyn11Yyn0 0.31 1.16 1.23 1.31 1.82 6
100 0.48 1.87 1.99 2.13 1.60
160 0.6 2.33 2.47 2.64 1.34
200 0.65 2.77 2.94 3.14
250 ±2×2.5±5 0.75 3.22 3.42 3.66 1.16
315 0.87 3.85 4.08 4.36 1.17
400 1.03 4.65 4.84 5.18 0.99
500 1.21 5.46 5.79 6.19
630 1.38 6.45 6.84 7.32 0.90
800 1.57 7.79 8.26 8.84
1000 1.86 9.22 9.78 10.4 0.76
1250 2.14 10.8 11.5 12.3
1600 2.51 13 13.8 14.8
2000 2.92 15.4 16.3 17.5 0.63
2500 3.48 18.2 19.3 20.7
2000 2.92 16.8 17.8 19.1 8
2500 3.48 20 21.2 22.7


3.Technical parameters of SC(B)12 series 20KV grade non-excitation voltage regulating distribution dry type transformer

Ratedcapacity kVA Voltage tap range Connectionsymbol No-load losskW Load loss kW No-loadcurrent% Short-circuitimpedance%
HVkV HV taprange % LVkV 130℃(B)(100°C) 155℃(F)(120°C) 180℃(H)(145°C)
50 202224 ±2.5 ±5 0.4 Dyn11Yyn0 0.27 1.16 1.23 1.31 1.59 6
100 0.43 1.87 1.99 2.13 1.43
160 0.53 2.33 2.47 2.64 1.19
200 0.58 2.77 2.94 3.14 1.19
250 ±2×2.5±5 0.67 3.22 3.42 3.66 1.04
315 0.77 3.85 4.08 4.36 1.03
400 0.92 4.65 4.84 5.18 0.88
500 1.08 5.46 5.79 6.19 0.88
630 1.22 6.45 6.84 7.32 0.80
800 1.4 7.79 8.26 8.84 0.80
1000 1.65 9.22 9.78 10.4 0.68
1250 1.9 10.8 11.5 12.3 0.68
1600 2.23 13 13.8 14.8 0.68
2000 2.59 15.4 16.3 17.5 0.56
2500 3.1 18.2 19.3 20.7 0.56
2000 2.59 16.8 17.8 19.1 0.56 8
2500 3.1 20 21.2 22.7 0.56


FAQ

Q1: What is a 20KV Indoor Dry-type Power Transformer used for?

A: It is used to convert high voltage to lower voltage for safe power distribution in buildings and industrial systems while ensuring high safety and efficiency.


Q2: What makes dry-type transformers safer than oil-filled ones?

A: The 20KV Indoor Dry-type Power Transformer uses solid insulation without oil, eliminating fire risks, leakage, and environmental hazards.


Q3: Can it operate in humid or polluted environments?

A: Yes, it is designed to operate in 100% humidity and harsh environments without performance degradation.


Q4: Is maintenance required?

A: Minimal maintenance is needed due to its sealed structure and high-quality materials.


Q5: What industries commonly use this transformer?

A: It is widely applied in healthcare, infrastructure, energy, and industrial sectors where reliability and safety are critical.


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