S11 800kVA 10/0.4kv Hermetically Sealed Low-Loss Oil Transformer

Product Description

Product Description

Voltage & Connection

Item	Value
HV Rated Voltage	10 kV(Compatible with 6/6.3/10.5/11 kV)
HV Tap Range	±5% or ±2×2.5%
LV Rated Voltage	0.4 kV
Connection Group	Dyn11 (common) or Yyn0
Impedance Voltage	4.00%

Loss & Current

Item	Value
No-load Loss (75℃)	1150W±15%
Load Loss (75℃)	10300 W±15%
No-load Current	0.6%

Weight & Dimension (Reference)

Item	Value
Core & Coil Weight	Approx. 1570 kg
Oil Weight	Approx. 450 kg
Total Weight	Approx. 2400–2460 kg
Overall Dimension (L×W×H)	Approx. 1700×1220×1300 mm
Base Distance	820×820 mm

Operating Environment

Item	Value
Ambient Temperature	-30℃ ~ +40℃
Altitude	≤ 1000 m
Application	Indoor / Outdoor

Outline Dimension

10kV Class S11-M Series Oil-Immersed Transformer - Technical Parameters
Rated Capacity (kVA)	HV (kV)	LV (kV)	Vector Group	No-load Loss (kW)	Load Loss (kW, 75°C)	No-load Current (%)	Impedance (%)	Total Weight (kg)	Track Distance (mm)
30	11/10.5/10/6.3/6	0.4	Yyn11/Dyn11	0.1	0.6	2.1	4	325	450/350
50				0.13	0.87	2	4	420	450/350
63				0.15	1.04	1.9	4	480	450/380
80				0.18	1.25	1.8	4	535	450/430
100				0.2	1.5	1.6	4	615	550/450
125				0.24	1.8	1.5	4	690	550/470
160				0.28	2.2	1.4	4	800	550/500
200				0.34	2.6	1.3	4	935	550/520
250				0.4	3.05	1.2	4	1110	650/550
315				0.48	3.65	1.1	4	1270	650/550
400				0.57	4.3	1	4	1540	650/550
500				0.68	5.15	1	4	1765	750/600
630				0.81	6.2	0.9	4.5	2095	850/660
800				0.98	7.5	0.8	4.5	2470	850/660
1000				1.15	10.3	0.7	4.5	2780	850/660
1250				1.36	12	0.6	4.5	3395	850/700
1600				1.64	14.5	0.6	4.5	3990	850/700
2000				1.94	18.3	0.6	4.5	4460	820/820
2500				2.29	21.2	0.6	4.5	5330	1070/1070

Main Product

Company Profile

    Zhejiang Yueqing Weiguan Electric Co., Ltd. is a professional manufacturer specializing in power transformers and electrical distribution equipment, with over 18 years of industry experience. We are dedicated to providing reliable, efficient, and cost-effective power solutions for global customers.

    Our product range covers oil-immersed transformers, dry-type transformers, compact substations, and related power equipment, widely applied in power grids, industrial facilities, commercial buildings, infrastructure projects, and renewable energy systems. With a strong focus on product performance and long-term reliability, our solutions are designed to meet diverse international standards and application requirements. 

    Weiguan Electric operates with advanced manufacturing facilities, modern production lines, and a skilled engineering team. From raw material selection to final testing, every process is strictly controlled to ensure consistent quality and stable performance. Our transformers are known for low loss, high efficiency, durability, and safety, helping customers optimize energy usage and reduce operational costs.

    With rich export experience, we have served clients across Asia, Africa, the Middle East, South America, and other regions. We understand the needs of international markets and provide flexible customization, fast response, and professional technical support to meet different project requirements.

    At Weiguan Electric, we believe that quality is the foundation, and partnership is the future. We are committed to building long-term cooperation with our customers by delivering dependable products, competitive pricing, and trustworthy service. We sincerely welcome global partners to work with us and create reliable power solutions together.

Certifications

Packaging & Shipping

FAQ

1. Are you a manufacturer or a trading company?

    We have over 18 years of experience in the research, development, manufacturing, and operation of transformers.

2. Do you support customization (voltage, capacity, frequency, etc.)?

    Considering differences in voltage, frequency and other speciality of transformer product in different countries and regions,our product can be customerized according to your requirements.

3. What is your delivery time?

      Standard lead time is 15–30 days depending on specifications and order quantity. For customized products or large orders, the delivery time will be confirmed based on production schedule.

4. What is the warranty period of your transformers?

    Warranty: 12 months. Free technical support and replacement parts will be provided for confirmed manufacturing defects during the warranty period.

5. What is the service life of your transformers?

    The typical service life of a transformer is around 20–30 years under normal operating conditions. With proper installation, regular maintenance, and controlled load, its lifespan can be extended to over 30 years. Key factors affecting service life include load level, operating environment, insulation aging, and maintenance quality.

6. Are your transformers tested before delivery?
    Final Inspection: Each transformer undergoes rigorous factory testing before shipment, with test reports provided.

7. Do you provide technical support and after-sales service?
    We offer comprehensive after-sales support:
    Remote Guidance: Technical assistance via phone, email, or video conferencing.
    On-site Service: Engineers can be dispatched to resolve issues at your location if required (additional fees apply).
Spare Parts Support: We guarantee long-term, stable supply of spare parts.

8. How can I choose the right transformer model?
    Oil-immersed transformers: Suitable for outdoor, power plant, and large industrial projects, offering a wide power range and high cost-effectiveness.

    Dry-type transformers: Ideal for indoor, commercial buildings, hospitals, data centers, and other locations with high fire safety requirements.