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Certified transformers (≤35kV), smart substations & PV-storage systems — engineered with 9 patents. Precision-built for renewable integration and grid reliability. Request specs
GGD AC LOW-VOLTAGE DISTRIBUTION CABINET
GGD AC low voltage distribution cabinet is used for power users such as power plants, substations, factories, and mining enterprises. It serves as an AC 50-60Hz distribution system with a rated working voltage of 380V and a rated working current up to 3150A. It is used for power conversion, distribution, and control of power, lighting, and distribution equipment.
HXGN-12 BOX TYPE FIXED AC METAL-ENCLOSED RING-NETTWORK SWITCHGEAR
The HXGN-12 AC metal enclosed ring network switchgear (referred to as ring network cabinet) is a newly designed and successfully developed high-voltage electrical product in accordance with the requirements of domestic rural and urban power grid transformation.
GGJ LOW-VOLTAGE DISTRIBUTION REACTIVE POWER COMPENSATION INTEGRATED CABINET
The GGJ type low-voltage distribution reactive power compensation comprehensive cabinet is a new type of outdoor distribution reactive power compensation comprehensive cabinet designed based on the principles of safety, economy, rationality, and reliability. A new type of outdoor comprehensive distribution box suitable for urban and rural power grid renovation, industrial and mining enterprises, street lighting, residential areas and other AC 50Hz, rated voltage 380V distribution systems, with multiple functions such as energy distribution, control, protection, reactive power compensation, and energy metering. At the same time, leakage protection function can be added according to user requirements.
KYN28-12 ARMORED REMOVABLE AC METAL-ENCLOSED SWITCHGEAR
The KYN28-12 armored movable AC metal enclosed switchgear is a complete set of distribution equipment for 3-12 kV three-phase AC single busbar and single busbar segmented systems. Mainly used for power plants, transmission of small and medium-sized generators, distribution of industrial and mining enterprises and institutions, and secondary substations of power systems for receiving and transmitting electricity, as well as starting large high-voltage motors.
Application scenario
Designed for Critical Power Infrastructure
Whether used in EPC projects or grid upgrades, our transformers deliver reliability, high efficiency, and compliance with international standards.
Industrial Plants
Residential Communities
Urban Distribution Networks
Power Grid Projects
Solar PV Systems
Product Features
Key Features of This Product Line
Built for industrial and utility-scale applications, our products feature high-quality materials, low energy loss, and robust insulation. Each unit is designed and tested to GB/IEC standards, with support for custom voltage levels, tap changers, and protection grades. From core processing to final testing, we ensure long-term reliability and project-specific adaptability.
On-load / off-load tap changers
Transformer ratings up to 35kV
Cabinet design & layout drawings
Site-matching size & interface
Customized cooling / protection level
PV inverter integration & full pre-wiring
Available Models & Technical Specifications
Available Models & Technical Specifications
| Model | Rated Voltage | Rated Current / Rated Capacity | Short‑Circuit Withstand | Installation Style | Standards & Protection |
|---|---|---|---|---|---|
| XL‑21 Power Distribution Box | 380 V/400 V/415 V | up to 3200 A | 50 kA/1s | Indoor panel | IEC 61439, IP30/IP31 |
| GGJ Reactive Power Compensation Cabinet | 400 V/415 V | up to 2500 A | 40 kA/1s | Indoor modular | IEC 61439‑1/2, IP40 |
| GGD Distribution Cabinet | 380 V/400 V/415 V | 1600–4000 A | 30–50 kA/1s | Indoor | IEC 61439, IP31 |
| MNS Draw‑Out Switch Cabinet | 380 V/400 V/415 V | 630–6300 A | 50 kA/1s | Indoor drawer type | IEC 61439, IP31 |
| HXGN‑12 Box‑Type Fixed AC Metal‑Enclosed Ring‑Network Switchgear | 12 kV | 630–4000 A | 25 kA/3s | Indoor metal‑enclosed | IEC 62271‑200, IP4X |
| XGN2‑12 Box‑Type Fixed AC Metal‑Enclosed Switchgear | 12 kV | 630–3150 A | 25 kA/3s | Indoor ring‑network | IEC 62271‑200, IP4X |
| KYN28‑12 Armored Removable AC Metal‑Enclosed Switchgear | 12 kV | 630–4000 A | 25 kA/3s | Indoor removable type | IEC 62271‑200, IP4X |
| DFW Series Cable Junction Box | 0.4 kV/3.6 kV | n/a | n/a | Outdoor sealed box | IP65, custom specs |
Tailor-Made Switchgear Solutions to Fit Your Power System
We Support Cabinet Customization Including:
Rated voltage, current, and breaking capacity
Cabinet structure (fixed / withdrawable / floor-standing)
Internal configuration (busbar layout, wiring method)
Protection level (IP30 / IP40 / IP54...)
Electrical component brand
Cabinet color, nameplate, and export packaging
We support transformer customization including
Factory Tested. Globally Delivered.
In-house vacuum drying, impulse testing, and heat run facilities
100% testing before shipment
CE / ISO9001 / ISO14001 certified
Export packaging + 3rd party inspection supported
Frequently Asked Questions
We understand that as a professional buyer, you may have technical, logistical, or customization concerns. Below are answers to some of the most frequently asked questions to help you make informed decisions.
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Q Can you customize switchgear specifications based on our project requirements?A
Yes. We offer fully customized switchgear solutions, including rated voltage (up to 40.5kV), current (up to 6300A), cabinet type (fixed or withdrawable), protection level, and internal layout. Our engineering team can design according to your one-line diagrams or technical specifications.
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Q Are your products compliant with international electrical standards?A
Absolutely. Our high and low voltage switchgear products comply with IEC 62271, IEC 61439, GB/T 3906, and other relevant international standards. We can also adapt to regional codes if specified.
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Q What quality control measures do you implement at the factory?A
Each unit undergoes 100% factory testing before delivery, including insulation resistance, dielectric strength, protection relay calibration, and functional simulations. Our plant is ISO9001-certified, and we support third-party inspection upon request.
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Q Do you provide test reports or certifications with the equipment?A
Yes. We provide complete testing documentation, including type test certificates, routine test reports, and wiring diagrams. Certification from recognized laboratories (e.g., CNAS, SGS) is available upon customer request.
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Q Is your switchgear easy to install and maintain on site?A
Yes. Our enclosures are modular, with clear terminal markings and optional plug-in modules for faster installation. We also provide detailed installation manuals, wiring diagrams, and remote technical guidance during commissioning if needed.
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Q What is the typical delivery time for standard or customized switchgear?A
Standard models can be delivered within 7–15 days. For customized units, production time is usually 15–25 days depending on complexity. We maintain flexible scheduling to support urgent projects.
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Q Do you offer OEM or branding services for overseas distributors?A
Yes. We support OEM and ODM services, including branding on the cabinet, customized color schemes, and private-label packaging. Long-term cooperation partners also enjoy exclusive distributor benefits and technical support.
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Q How can I get a quote or technical proposal for my project?A
Please send us your technical drawings, SLD (single-line diagram), or specification sheets. Our sales engineers will provide a tailored quotation and configuration proposal within 24 hours.
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Whether you're upgrading an existing line or starting a new project, STON will customize a CNC solution for your production.