Key Advantages
1. Dry Type Design for Safety & Low Maintenance
Natural Air Cooling (AN): Eliminates the need for oil, reducing fire risk and maintenance costs.
Flame-Retardant Materials: UL94 V-0 compliant, providing excellent fire resistance.
2. Electrical Isolation & Noise Suppression
Galvanic Isolation: Establishes a new neutral grounding system to eliminate common-mode interference.
Optional Shielding Layer: When grounded properly, effectively suppresses high-frequency EMI for sensitive equipment.
3. Flexible Voltage Conversion
Supports Δ-Δ, Δ-Y, or Y-Δ connections for step-down or step-up applications.
Custom input/output voltages and tap settings (±5 %) to match regional power requirements.
4. High Efficiency & Reliable Performance
Efficiency ≥95 % with waveform distortion <0.1 %.
Load regulation within ±1 % from no-load to full-load.
Vacuum-impregnated F/H-class insulation for long service life and exceptional thermal stability.
Dimensions with housing
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Model
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SG -kVA
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Phase
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3 Phase
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Capacity
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0.5~400 kVA (Can be customized)
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Primary Voltage
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110V/ 120V/ 208V/ 220V/ 230V/ 240V/ 380V/ 415V/ 480V (Can be customized)
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Secondary Voltage
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110V/ 120V/ 208V/ 220V/ 230V/ 240V/ 380V/ 415V/ 480V (Can be customized)
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Winding Material
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Aluminium/ Copper (optional)
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Voltage Convert
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Single phase to single phase, three phase to three phase, three phase to single phase
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Frequency
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50Hz / 60 Hz
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Work Efficiency
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≥95%
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Insulation Resistance
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≥5 MΩ
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Electrical Strength
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3000V AC/1 min
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Noise
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<35 – 65dB (1 meter)
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Insulation Grade
|
H level
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Wiring Mode
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Dyn11
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Cooling Mode
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Dry type air cooling
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Overload Capacity
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Allow more than 1.2 times rated load to work for up to 4 hours
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Temperature
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-15℃~+40℃
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Humidity
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≤90%RH, without condensation
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Product specifications
| MODEL | Input voltage | Output voltage | Measurement(mm) Length*Width*Height |
| SG-500VA | Default 660V 440V 380V 220V 208V 200V (customizable voltage) | Default 660V 440V 380V 220V 208V 200V (customizable voltage) | 420*330*360 |
| SG-10KVA | 460*350*450 | ||
| SG-15KVA | 490*390*450 | ||
| SG-20KVA | 520*430*470 | ||
| SG-25KVA | 580*460*450 | ||
| SG-30KVA | 580*460*540 | ||
| SG-50KVA | 750*480*690 | ||
| SG-80KVA | 800*500*740 | ||
| SG-100KVA | 900*550*840 |
Applications
- Data centers & IT infrastructure — clean, isolated power for servers and network gear.
- Medical & laboratory equipment — imaging, diagnostics, test benches.
- Industrial automation & CNC — motors, robots, control panels needing low-noise, isolated supply.
- Renewables & power distribution — step-down and isolation for solar inverters, microgrids and local distribution.
- Renewable Energy & Power Distribution – Step-down transformation for solar and wind integration.
Why Choose ZHENGXI
As a global transformer manufacturer with decades of engineering expertise, ZHENGXI provides:
ISO-Certified Production & CE Compliance for international markets.
Custom Engineering Services to meet unique voltage, frequency, and enclosure needs.
High-Grade Materials & Precision Winding using orthocyclic techniques and vacuum impregnation for unmatched durability.
Responsive Technical Support and rapid lead times to keep projects on schedule.
FAQs
1. What is the difference between a dry type transformer and an oil-filled transformer?
A dry type transformer uses air as the cooling medium, eliminating flammable oil. This design reduces fire risk, requires less maintenance, and is ideal for indoor or high-safety applications.
2. Can the SG series be customized for specific input/output voltages?
Yes. ZHENGXI offers full customization of input/output voltage levels, tap settings (±5 %), and connection groups (Δ-Δ, Δ-Y, Y-Δ) to meet regional or project-specific requirements.
3. Is the SG transformer suitable for sensitive electronic equipment?
Absolutely. With galvanic isolation, optional shielding layers, and <0.1 % waveform distortion, the SG series provides clean, stable power for servers, medical imaging systems, and precision laboratory instruments.
Need a quote or a project-specific drawing for an SG dry type transformer, an isolation transformer, or a 100kva transformer? Send your system voltage, connection preference and load profile — our engineers will size and quote quickly.
