300kVA oil filled pad mounted transformer,oil filled padmount transformer manufacturer-Guanghui

Oil-Immersed Transformers

300kVA Single-Phase Oil-Immersed Plate Transformer (S13-300/10)

300kVA Single-Phase Oil-Immersed Pad Mounted Transformer (S13-300/10)

The 300kVA oil-immersed pad mounted transformer is a core equipment for small and medium-capacity single-phase power distribution. Adopting a plate-type heat dissipation structure and a fully sealed oil-immersed design, it combines the benefits of highly efficient, uniform cooling and a compact footprint with low loss and reliable insulation. Oil filled padmount transformer is highly suitable for single-phase power scenarios with strict cooling requirements and limited space, such as urban old residential grid upgrades, small industrial workshops, and rural centralized residential power distribution.

Core Parameters:

• Energy Efficiency: Tier 2 Efficiency (Complies with GB 20052-2024).

• Structure: Plate Heat Dissipation + Fully Sealed Oil Tank (Compact, dustproof, and moisture-proof).

• Warranty: 3-Year Standard Warranty.

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icon Product Features

Efficient Plate Cooling

Specialized plate radiators increase the cooling area. As an oil filled padmount transformer, its heat dissipation efficiency is boosted by 15% compared to traditional corrugated types, rapidly exporting operational heat.

Low Loss & Long Life

Tier 2 efficiency design combined with pure copper windings reduces running losses. This oil filled pad mounted transformer adopts a fully sealed tank that prevents oil degradation, yielding a 25+ year lifespan.

High Reliability & Safety

Equipped with complete protection devices (Buchholz relay, pressure valve, thermometer). Anti-corrosion steel tank adapts to harsh outdoor weather and dust.

Compact & Adaptable

The plate design saves space, supporting narrow indoor environments or outdoor setups. 1.2x overload capacity comfortably handles short-term peak loads.

Easy Maintenance

The hermetically sealed structure minimizes maintenance needs. Simply conduct periodic visual checks on oil quality, seals, and radiator cleanliness.

Single-Phase Ready

Optimized specifically for single-phase distribution networks. Direct and simple wiring avoids the energy waste associated with phase imbalances.

icon Key Specifications (300kVA Plate Type)

Parameter	Typical Value	Description
Rated Capacity	300kVA	Maximum apparent power under long-term safe operation, meeting single-phase load demands.
Rated Voltage	10kV / 0.23kV	Customizable 6kV, 11kV high voltage to adapt to different single-phase grid standards.
Vector Group	Ii0	Standard single-phase connection; simple wiring perfectly adapted to single-phase systems.
Impedance	4.5%~6.5%	Standard 5%~6% limits short-circuit currents, protecting downstream single-phase equipment.
No-Load Loss	≤ 0.55kW	Complies with Tier 2 standards; low idle energy consumption saves costs.
Load Loss (75℃)	≤ 3.0kW	Copper windings reduce resistance loss; plate heat dissipation boosts energy conversion efficiency.
Winding Temp. Rise	≤ 65K (AN, Class A)	Oil immersion and plate radiators act synergistically to prevent insulation aging caused by high heat.
Noise Level	≤ 52~57dB(A)	Low-noise core and shock-absorbing design lower noise by 5dB compared to traditional units.
Cooling Method	ONAN + Plate Radiator	Plate radiators enlarge the cooling surface, ensuring uniform heat exchange under continuous loads.

icon Detailed Description

The S13 type 300kVA oil-immersed padmount transformer, also known as an oil filled padmount transformer, is a single-phase, Tier 2 efficiency distribution transformer featuring a combination of a plate-type cooling structure, a fully sealed oil tank, and copper windings. It is currently the mainstream model for small-to-medium single-phase power distribution in the domestic market. Its core advantage lies in the plate cooling design, which increases the cooling area by approximately 20% and cooling efficiency by 15% over traditional corrugated designs. This rapidly dissipates operational heat and precisely controls temperature rise.

Simultaneously, the hermetically sealed tank prevents transformer oil from oxidizing and absorbing moisture, drastically slowing down oil degradation. As a reliable oil filled pad mounted transformer, it adopts copper windings that provide a low-resistance characteristic, which, combined with the highly efficient plate radiators, achieves low-loss and stable operation—reducing losses by about 20% compared to traditional S11 models. Delivering excellent overload capacity and environmental endurance (-25℃ to 40℃), it is widely applied in single-phase scenarios with high cooling demands and limited spaces.

icon S11 Type Padmount Transformer Parameters & Scenarios

Parameter	Typical Value	Description
Energy Efficiency	GB 20052-2024 Tier 2 (NX2)	Adapts to basic energy-saving compliance requirements.
No-Load Loss	Approx. 0.7kW	Slightly higher loss than S13, satisfying basic single-phase distribution energy needs.
Load Loss (75℃)	Approx. 3.0kW	Consistent with the S13 model of the same capacity.
Partial Discharge	≤ 10pC	Reliable insulation performance, ensuring basic operational safety.
Structure	Plate Radiator + Sealed Tank	High-efficiency cooling design suitable for space-constrained scenarios.
Applicable Scenarios	Budget-limited, load ≤ 60%	Ideal for centralized rural communities, small shops, and old residential grid upgrades requiring compact footprints.

icon Standard S13 Series Technical Reference

Capacity (kVA)	Impedance (%)	No-Load Loss (W)	Load Loss (W)	No-Load Current (%)	Oil Weight (kg)	Total Weight (kg)	Dimensions W×D×H (mm)	Gauge (mm)
30	4.0	80	630 / 600	1.2	100	340	790×580×910	400
50	4.0	100	910 / 870	1.2	115	410	830×600×970	400
63	4.0	110	1090 / 1040	1.0	120	440	850×630×1000	400
80	4.0	130	1310 / 1250	1.0	135	470	900×650×1000	400
100	4.0	150	1560 / 1500	0.8	150	500	950×700×1000	400
125	4.0	170	1890 / 1800	0.8	175	600	1100×800×1000	550
160	4.0	200	2310 / 2200	0.7	200	700	1200×900×1050	550
200	4.0	240	2730 / 2600	0.7	215	750	1300×1000×1050	550
250	4.0	290	3200 / 3050	0.7	240	900	1400×1050×1100	550
315	4.0	340	3830 / 3650	0.6	275	1050	1500×1100×1150	660
400	4.0	410	4520 / 4300	0.6	310	1300	1550×1150×1150	660
500	4.0	480	5410 / 5150	0.6	360	1500	1650×1230×1200	660
630	4.5	570	6200	0.6	420	1700	1600×1250×1250	820
800	4.5	700	7500	0.5	520	2100	2100×1300×1650	820
1000	4.5	830	10300	0.5	620	2400	2150×1350×1700	820
1250	4.5	970	12000	0.5	680	2700	2200×1400×1900	820
1600	4.5	1170	14500	0.5	880	3400	2300×1450×1900	820
2000	5.0	1360	18300	0.4	1050	4400	2100×2200×2100	820
2500	5.0	1600	21200	0.4	1260	5000	2150×2300×2200	820

* The table above shows standard three-phase S13 series parameters, provided as a general manufacturing reference for the S13 technology platform.

icon FAQ

These oil immersed units serve urban residential areas, commercial parks and underground power grids. The oil filled pad mounted transformer adopts anti-theft sealed cabinet, fitting outdoor ground installation without extra fence layout.

Mineral insulating oil inside oil filled pad mounted transformer realizes dual functions of heat dissipation and winding insulation. The sealed oil tank of oil filled padmount transformer slows insulation aging and improves stable operation under heavy load.

A well-maintained oil filled pad mounted transformer normally runs 25–30 years. Regular oil filtration and leak inspection extend the lifespan of oil filled padmount transformer, avoiding early failures caused by oil deterioration and moisture invasion.

As a professional manufacturer, we customize single/three-phase oil filled pad mounted transformer with 15–5000kVA capacity. The oil filled padmount transformer complies with IEEE & IEC standards to match global distribution network demands.

Check oil tightness, temperature and internal fuses monthly for oil filled pad mounted transformer. Timely replace degraded dielectric oil of oil filled padmount transformer to prevent overheating and short-circuit risks in outdoor working environments.

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