800KVA 10KV Oil-immersed transformer OLTC

800 kVA, 10 kV oil-immersed transformer in the 10KV Distribution Transformer series. On-load tap-changing option listed. Confirm capacity, voltage ratio, winding and insulation materials, tap arrangement, losses, impedance, frequency, environmental conditions, testing and applicable standards against the project specification before ordering.

800kVA、10kV 油浸式变压器，归属10KV配电变压器系列。标注有载调压配置。下单前应结合项目技术文件确认容量、电压比、绕组与绝缘材料、调压方式、损耗、阻抗、频率、使用环境、试验范围及适用标准。

Manufacturer-supplied product information: Jiangsu Huayu Electric Co., Ltd.

Product Details

800KVA 10KV Oil-immersed Transformer OLTC: Core Equipment for Power Distribution Voltage Stabilization

 

Power grid load fluctuations and the integration of new energy sources can easily cause voltage deviations. Conventional voltage regulating equipment requires power outages for adjustment, which can disrupt production operations. Purchasers often face the dual challenges of voltage instability damaging terminal equipment and production capacity loss due to downtime for voltage regulation. This 800KVA 10KV Oil-immersed Transformer OLTC features an on-load tap changer structure, which can correct the output voltage in real time without power interruption. It is suitable for long-term continuous operation in industrial and commercial plants and power plant distribution systems, stabilizing power output, reducing equipment failure downtime, and lowering line losses and maintenance costs.

 

This equipment is a mainstream three-phase medium-voltage power distribution unit. Unlike dry-type transformers, it utilizes insulating oil for efficient heat dissipation and insulation protection. Suitable for outdoor box-type power distribution scenarios, it can be integrated into a box-type substation and used with a high-and-low voltage switchgear to complete the entire power distribution circuit. It can also be matched with an Electric Power Converter to regulate renewable energy current. It is widely used in Combined Photovoltaic Substations, mining power supply, industrial parks, and small to medium-sized municipal substations. The product uses a high-permeability silicon steel core, with no-load losses kept to an industry low level. The OLTC tap changer ensures smooth switching and withstands frequent voltage regulation. The fully sealed oil tank structure delays insulating oil aging, making it suitable for outdoor conditions with large day-night temperature differences and high dust levels. The unit's voltage regulation range covers the normal fluctuation range of the power grid, keeping output voltage fluctuations within compliant ranges. This ensures stable operation of precision production equipment and meets the stringent voltage accuracy requirements of photovoltaic power plants. The overall design complies with international Power Distribution Equipment manufacturing standards, is compatible with multiple national power grid standards, and supports long-term, all-weather continuous outdoor operation.

 

Product Features

OLTC Uninterrupted Voltage Regulation: Voltage regulation is completed under load conditions, eliminating production stoppages caused by power outages and adapting to dynamic load changes in new energy power plants.

Low-Loss Oil-Immersed Structure: As a standard oil-immersed transformer, it offers balanced heat dissipation and insulation performance, resulting in lower energy consumption and longer maintenance cycles over the long term.

 

Practical Tips

Equipment installation requires reserved ventilation and maintenance space. When used with a Box Type Substation, the enclosure's ventilation filter needs to be cleaned quarterly to prevent overheating due to obstructed heat dissipation.

 

FAQ

Q: Can this 800KVA 10KV Oil-immersed transformer OLTC be used with photovoltaic (PV) systems?

A: It can be directly connected to Combined Photovoltaic Substations and linked with Electric Power Converters and high/low voltage switchgear to meet the voltage boosting and stabilization needs of distributed PV systems.

 

Q: How to set the daily maintenance cycle? 

A: Oil quality testing is performed annually under normal operating conditions. An internal inspection is conducted after the OLTC tap changer has accumulated 5,000 switching cycles. Insulating oil is filtered or replaced as needed every 2 to 4 years.

 

Q: Compared to a Dry Type Transformer, what are the differences in the applicable scenarios for this product?

A: The oil-immersed model has a higher heat dissipation limit, suitable for large-capacity, long-term continuous outdoor loads; the dry type is more suitable for harsh indoor fire protection scenarios. This Oil Immersed Transformer is the preferred choice for outdoor use.

 

Q: What does the after-sales warranty and fault support include?

A: The entire unit comes with a standard warranty period and a complete set of test reports. For faults such as voltage regulation and leakage, we provide remote technical guidance and simultaneously supply original OLTC switches and sealing accessories.