Product Overview
Weatherproof Photovoltaic Step-Up Substation from a Trusted Power Equipment Factory
The prefabricated solar PV substation known as YBM-35/0.8 is efficient power distribution unity of photon plant. It includes high-voltage switchgear, transformer and the low-voltage switchboard assembled together into a hermetic outdoor module. It increases the PV plant voltage level to 35kV for grid connection.
Applications & circuit protection
This step-up substation acts as an intermediary that connects the PV plants with the 35 kV grid ensuring safety and transformation of energy produced.
- Utility solar power plants: Step-up for connecting to the grid.
- Distributed solar power: Compact step-up for commercial premises.
- Solar power plus storage: Integrated conversion and connection of energy.
- EPC projects: Supply package to developers.
Construction & operating reliability
The integrated cabinet with ONAN/ONAF cooling and IP54/IP65 environmental rating ensures reliable operation even in outdoor solar plant conditions.
- Integrated high voltage switchgear, transformer and low voltage distribution boards.
- Capacity range from 1000 kVA to 6300 kVA.
- IP54/IP65 certified cabinet.
- ONAN/ONAF cooling technologies.
- Ready-to-use installations.
Technical Parameter
| Parameter | Value |
| Rated voltage | 10 / 0.4 kV (HV / LV) |
| Maximum operating voltage | 12 kV (HV side) |
| Rated frequency | 50 Hz |
| Rated capacity | 50-1600 kVA |
| 1-min power frequency withstand voltage | 35 kV |
| Lightning impulse voltage | 75 kV |
| Cooling method | Oil natural air natural (ONAN) |
| No-load regulation | ±5% / ±2×2.5% |
| Degree of protection | IP43 |
| Noise level | ≤50 dB |
| High-voltage rating | 35 kV (primary) |
| Low-voltage rating | 0.4 – 10 kV (secondary, customizable) |
| Power rating | 1000 – 6300 kVA |
| Frequency | 50/60 Hz |
| Insulation class | F (temperature rise ≤100K) |
| Protection level | IP54 / IP65 |
| Short-circuit impedance | 6.5% – 8% |
| Standard | IEC / GB 17467 |
Substation Price & Project Quotation
When it comes to the prices of prefabricated substations, a lot relies on the type of transformers, their capacity, HV/LV design, type of protection system, and other accessories required for the project. As a manufacturer, the price of the whole setup, transformer switchgear, LV panel, and case is given in one quotation.
- Price charges for the whole item
- Drawings and certification are also included
- Scaled-down prices for bulk orders
Substation Wiring & Site Connection
The unit is delivered with the necessary preparations in place for electrical connections and also comes with all wires tested and functioning. The connection of the high voltage and low voltage cables on site is facilitated through the wiring done at the factory.
- Complete in-factory wiring performed and verified
- HV and LV cable entries made in accordance with specifications
- Earthing system connected
Compare Substation Options
Choose the configuration that matches your site:
| Feature | This Unit | Alternative |
| Capacity | As specified | Other kVA ratings available |
| HV/LV | Per single-line diagram | Custom configuration |
| Enclosure | IP43 / IP54 | Indoor or outdoor layout |
| Application | Distribution / renewables | Utility, industrial or solar/wind |
Export Markets & Country Compatibility
full substations are shipped to projects around Asia, Africa, the Middle East, Latin America, and the Pacific Rim. Each unit will be engineered to fulfill the respective country’s electrical grid specifications, voltage category, and installation requirements.
Substation Dimensions, Weight & Delivery
The dimensions of the whole substation and the weight of the whole substation depend on the configuration as well as the capacity. A substation typically rated at 250-630 kVA consists of 3000-5000 mm lengths, 1500-2500 mm width and 1800-2600 mm height. In addition to this, they are delivered in form of one or many units of a substation which has/have already been assembled. The overall dimensions and weight and points used for lifting are identified from the project drawings.
- Overall dimensions from project drawings
- Design of different sections based on transport accessibility
- Plan for lifting and installing substation on site
Standards & certifications
The equipment made in compliance with IEC/GB 17467 will be available with the necessary documents for type-test approval of PV projects.
- Applicable standard: IEC/GB 17467.
- Integrated substation design confirmed.
- IP54/IP65 enclosure protection rating.
- Documents needed for project and grid approval.
OEM & B2B supply support
Subian Electric is a leading manufacture and supplier in the power equipment sector and offers PV powers developers, EPC contractors, and distributors with timely provision of step-up substations, as well as accompanying technical support services.
For acquiring equipment with certain features regarding capacity and voltage, please contact us and provide your parameters.
- Samples and technical drawings available.
- Flexible quantities for PV Project purchasing.
- OEM/ODM assistance.
- Custom marking and packaging.
- Support with technical documentation and certifications.
Frequently Asked Questions
What is a PV step-up substation?
A PV step-up substation consists of HV switchgear, a transformer and LV panels in one outdoor construction which increases the voltage of the PV plant to 35kV for connection to the grid.
What capacities are available?
The range of power ratings for utility and commercial PV plants is represented here from 1000 kVA to 6300 kVA.
What protection level does it offer?
The substation is fitted in accordance with standard IP54/IP65 for outdoor solar plants.
Do you supply to PV developers?
Definitely – we can supply the developers with drawings, documents and specifications on equipment.
