Medium & Low Voltage Electrical Equipment for Renewable Energy Integration
Medium-voltage transformers, prefabricated skid substations, and AC/DC distribution switchgear provide reliable power collection, step-up conversion, and grid interconnection for utility-scale solar PV plants, battery energy storage systems (BESS), and wind energy facilities. Built in accordance with IEC 62271, IEC 60076, and IEEE standards, these systems integrate environmental protection, thermal management, and electrical protection to withstand continuous operation in harsh ambient conditions (-40 degrees C to +60 degrees C).
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Product Series
Solar PV Compact Transformer Stations (Skid-Mounted / Containerized)
Voltage Rating: Up to 36 kV / 1500 VDC input
Capacity Range: 1000 kVA to 6300 kVA
Primary Components: Inverter transformer (liquid-filled or dry-type), SF6 or solid-insulated ring main unit (RMU), low-voltage incoming cabinet, and auxiliary control panel.
Key Feature: Factory-assembled on a structural steel skid or housed within a corrugated ISO shipping container for direct plug-and-play field deployment.
Battery Energy Storage System (BESS) Power Conversion Substations
System Topology: Integrated PCS (Power Conversion System) and step-up transformer units.
Voltage Compatibility: AC 400V / 690V to MV 12 kV / 24 kV / 36 kV
Thermal Management: Forced air cooling or liquid cooling channels tailored to continuous dual-direction charge/discharge load profiles.
Key Feature: Includes multi-function protection relays, isolated auxiliary transformers, and fire suppression interfaces matching NFPA 855 safety requirements.
Wind Farm Collection & Step-Up Transformers
Voltage Rating: 12 kV / 24 kV / 36 kV / 40.5 kV
Winding Configuration: Dual-winding or multi-winding step-up configurations for multiple turbine inputs.
Insulation Medium: High-flashpoint ester fluid (synthetic/natural) or mineral oil.
Key Feature: Designed to withstand high harmonic content, transient overvoltages, and cyclic mechanical vibration inside wind turbine towers or adjacent outdoor pads.
Photovoltaic DC & AC Combiner Enclosures
Voltage Rating: 1000 VDC / 1500 VDC / 400 VAC / 800 VAC
Circuit Count: 4-way to 32-way input channels
Enclosure Protection: IP65 / NEMA 4X fiberglass reinforced polyester (SMC/FRP) or 304 stainless steel.
Key Feature: Equipped with 1500V DC fuses, surge protective devices (SPD Type 1+2), RS485/CAN bus monitoring modules, and load break isolator switches.
Specifications & Configuration
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Medium Voltage Grid-Tie Equipment (MV Series) |
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|
Parameter |
Specification |
|
Rated Operational Voltage (Un) |
12 kV / 24 kV / 36 kV / 40.5 kV |
|
Rated Busbar Current (In) |
630 A / 1250 A / 2500 A |
|
Short-Time Withstand Current (Icw) |
20 kA / 25 kA / 31.5 kA (3 seconds) |
|
Lightning Impulse Withstand Voltage (BIL) |
75 kV / 125 kV / 170 kV / 200 kV |
|
Transformer No-Load Loss |
Compliant with IEC EN 50588-1 / EU Tier 2 EcoDesign |
|
Insulation Class |
Class H (Dry-Type: 180°C) / Class A (Oil-Immersed: 105°C) |
|
Enclosure Protection Rating |
IP54 / IP55 / IP65; NEMA 3R / NEMA 4X |
|
Internal Arc Classification (IAC) |
IAC AFLR, 20 kA, 1 s per IEC 62271-200 |
|
Structural Coating |
Marine-grade C4 / C5-M anti-corrosion polyester powder coating; panel thickness ≥ 2.0 mm |
|
Low Voltage Combiner & Distribution Series (LV Series) |
|
|
Parameter |
Specification |
|
Rated Operational Voltage (Un) |
400 V / 690 V / 800 VAC / 1500 VDC |
|
Rated Current (In) |
100 A–4000 A |
|
Short-Circuit Breaking Capacity (Icu) |
35 kA / 50 kA / 65 kA |
|
Operating Temperature Range |
-40°C to +60°C; derating tables provided for temperatures above 40°C |
|
Enclosure Material |
2.0 mm 304/316L stainless steel, hot-dip galvanized steel, or SMC composite |
|
Communication Interfaces |
RS485, Modbus-RTU, IEC 60870-5-104, Ethernet |
Primary Applications
Utility-Scale Solar PV Farms:
Step-up voltage transformation from 800 VAC central inverters to 33 kV / 36 kV grid transmission lines.
Commercial & Industrial BESS:
Voltage matching, isolation, and distribution for peak-shaving, load-shifting, and microgrid applications.
Onshore Wind Energy Parks:
Intermediate power collection and step-up conversion for wind turbine generator strings.
High-Power EV Charging Hubs:
Direct connection between high-voltage distribution lines and multi-megawatt EV charging infrastructure.
Customization & OEM Capabilities
Mechanical Layouts:
Custom dimensions to match limited footprint constraints, containerized enclosures (10ft, 20ft, 40ft ISO standard), or open skid assemblies.
Environmental Adaptation:
C5-M marine-grade painting for coastal salt-spray conditions, anti-condensation space heaters with dual humidistats, and solar radiation shields for desert environments.
Protection & Automation Integration:
Integration of multi-function digital protection relays (SEL, Schneider, ABB, or specified brands), Fault Passage Indicators (FPI), SCADA communication gateways, and revenue-grade CT/VT metering units.
Transformer Winding Options:
Copper or aluminum windings with low-loss amorphous alloy cores or high-permeability grain-oriented silicon steel sheets.
Testing & Quality Control
Dielectric & Insulation Testing:
Power frequency withstand voltage test (up to 95 kV) and induced overvoltage test.
01
Partial Discharge Measurement:
Dry-type transformers and gas-insulated switchgear units are verified to maintain partial discharge below 5 pC at 1.2 Un.
02
Helium Leak Detection:
Mass spectrometer helium testing on sealed SF6 gas tanks ensures annual leak rates stay below 0.1%.
03
Temperature Rise Verification:
Full-load thermal rise validation confirming winding and enclosure temperatures remain within specified IEC/IEEE limits.
04
Enclosure Integrity Checks:
IP55/IP65 ingress verification, water spray resistance, and salt-spray corrosion testing per ASTM B117 (up to 1,000 hours).
05
Export Packaging: Vacuum VCI anti-rust wrapping, edge foam corner protectors, and reinforced, heat-treated wooden cases certified to IPPC ISPM 15 standards. Oversized skids are secured with heavy-duty lashing points for breakbulk or open-top container transport.
Technical Documentation Package:
Factory Acceptance Test (FAT) Reports & Material Certificates
As-Built Electrical Single-Line Diagrams, Wiring Schematics, and 3D STEP Models
Installation, Operation, and Maintenance (IOM) Manuals
Type Test Certificates from accredited independent laboratories
Shipping Terms: FOB, CIF, DDP via FCL, Flat Rack, or Open Top containers with complete customs documentation.
FAQ
Request a Quote
To receive a detailed technical proposal and commercial quotation within 24 hours, please submit your project parameters to our engineering team:
System Type: Solar PV, Battery Energy Storage (BESS), Wind Energy, or Hybrid Microgrid.
Electrical Parameters: System voltage (kV/V), total capacity (kVA/MVA), frequency (50Hz / 60Hz), and target short-circuit rating (kA).
Single-Line Diagram (SLD): Equipment layout, branch count, and protection requirements.
Site Ambient Conditions: Temperature extremes, altitude, humidity, and enclosure IP/corrosion requirements.
Project Timeline & Delivery Terms (FOB / CIF / DDP).
Email your technical specification package directly to our engineering department: [Sales / Engineering Email]
We're well-known as one of the leading renewable energy equipment manufacturers and suppliers in China. We warmly welcome you to wholesale high quality renewable energy equipment at competitive price from our factory. If you have any enquiry about cooperation, please feel free to email us.
PV Prefabricated Cabin, Integrated Energy Storage Cabin, renewable energy equipment
