II. 100 KVA Transformer Type
HENGFENGYOU ELECTRIC designs and manufactures a comprehensive range of 100 kVA transformers utilizing the same fundamental electromagnetic principles but engineered with distinct structural topologies to satisfy diverse global grid applications.
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100 kVA Three-Phase Oil-Immerse Transformer (Rated Voltage: 6 kV to 35 kV) – Ideal for outdoor grids, rural electrification, and industrial heavy loads.
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100 kVA Cast Resin Dry-Type Transformer (Rated Voltage: 6 kV to 35 kV) – Perfect for indoor facilities, commercial complexes, and high-safety environments.
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100 kVA Single-Phase Pole-Mounted Transformer (Rated Voltage: 2.4 kV to 34.5 kV) – Engineered for overhead utility distribution and remote rural grids.
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100 kVA Single-Phase Pad-Mounted Transformer (Rated Voltage: 2.4 kV to 34.5 kV) – Designed for North American style underground low-profile residential distribution.
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100 kVA Three-Phase Pad-Mounted Transformer (Rated Voltage: 2.4 kV to 34.5 kV) – Engineered for reliable underground commercial power supply.
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100 kVA Isolation Transformer (Low Voltage: 120V, 127V, 208V, 220V, 380V, 400V, 600V) – Engineered for precise voltage matching and galvanic signal isolation.
III. The core advantages of a 100 kVA transformer
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Global Standard Compliance: Fully complies with GB, IEC, GOST, EN, NF, and ANSI/IEEE standards. Custom engineering is available to meet specific utility grid codes.
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International Certifications: Certified by ISO9001, CE, IEC, SABS, COC, CSA, and UL, assuring global cross-border market entry and insurance approval.
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Premium Eco-Design Efficiency: System efficiency exceeds 99%, fully satisfying the stringent European 2015/2014/548/EC Ecodesign Tier 2 energy efficiency regulations, lowering long-term operational costs (OPEX).
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Maintenance-Free Enclosure: Featuring an IP65 hermetically sealed protection level. It is 100% dustproof and moisture-proof, offering a maintenance-free design with an engineered operational lifespan of over 25 years.
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Eco-Friendly Sustainability: Optional biodegradable FR3 vegetable/ester oil is available to reduce carbon footprint and mitigate environmental hazards.
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Robust Overload Capacity: The high-purity copper-wound 100 kVA model reliably supports a short-term emergency overload up to 150% of the rated capacity for up to 2 hours (requires top oil temperature monitoring to remain ≤ 95 ℃).
IV. Price of 100 kVA Transformer
V. Global Project Showcases & Success Stories
Scale Your Energy Business with HENGFENGYOU ELECTRIC
As a premium global electrical equipment manufacturer, our accumulated engineering expertise and cutting-edge manufacturing technology have benefited EPC contractors and utilities in more than 50 countries. We focus on establishing long-term, trusted partnerships by delivering zero-defect power products and unparalleled technical support.

VI. Frequently Asked Questions (FAQ) for 100 KVA Transformers
1. What are the typical application scenarios of 100kVA three-phase oil immersed transformers?
*Power distribution for small and medium-sized factories;
*Electricity supply for commercial buildings, hospitals, or schools;
*Voltage conversion of rural power grids or community distribution systems;
*Power distribution at temporary construction sites.
2. What are the common configurations for its rated input/output voltage?
*High voltage side: 11kV (domestic distribution standard);
*Low voltage side: 400V (three-phase four wire system, line voltage 400V/phase voltage 230V);
3. How to calculate its rated current?
*High voltage side: I=100kva/11kV/√3=5.24A
*Low voltage side: I=100kva/0.4kV/√3=144.3A
4. What are the requirements for the surrounding environment during installation?
*Good ventilation, keep away from flammable and explosive materials;
*The basic platform needs to be level and load-bearing (with an oil content of about 200kg);
*Reserved heat dissipation space (with a side distance of ≥ 0.8 meters from the wall and no obstruction at the top);
*Outdoor installation requires the installation of rain covers or fences.
5. What is the overload capacity of a 100kVA transformer?
*Short term overload (such as within 2 hours) can reach 150% load (copper coil);
*Long term overload will accelerate insulation aging, and it is necessary to avoid operating beyond the rated capacity.
6. What are the key points to pay attention to in daily maintenance?
*Oil level check: The oil gauge of the oil pillow should be within the marked range;
*Oil temperature monitoring: During normal operation, the top oil temperature is ≤ 65 ° C;
*Leakage inspection: Check for oil leakage in the fuel tank welds and gaskets;
*Regular tests: insulation oil withstand voltage test, winding DC resistance measurement (once a year).
7. How to determine whether insulation oil needs to be replaced?
*Breakdown voltage: below 30kV (new oil standard ≥ 35kV);
*Excessive acid value:> 0.1mg KOH/g;
*High moisture content:> 20ppm;
*Oil color dark black or with carbide particles (needs to be filtered or oil changed).
*Reason: Overload, blocked radiator, oil circulation failure, internal winding short circuit;
*Solution: Immediately reduce the load and check the load; Clean the heat sink or repair the cooling system; Suspend maintenance for internal faults.
9. What protective devices must be configured?
*High voltage side: drop out fuse or circuit breaker (overcurrent protection);
*Low voltage side: air switch (short circuit protection);
*Body protection: gas relay, pressure relief valve, thermometer;
*System protection: lightning arrester (lightning protection), grounding device (grounding resistance ≤ 4 Ω).
10. How to choose energy efficiency level when purchasing?
*Standard: According to local national energy efficiency regulations or customer requirements
*Example: 100kVA oil immersed transformer with the latest energy efficiency in Europe has a no-load loss of 130W and a load loss of 1250W; Energy efficiency>99.19%