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.
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
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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