High Voltage Switchgear
-- Steady & Reliable Manufacturer --
Product Overview
High Voltage (HV) Switchgear is the "Gateway of the Grid," designed for transmission voltages generally above 36kV and up to 110kV+. At DSJ Electrical, we specialize in high-voltage Gas Insulated Switchgear (GIS) and outdoor Live-Tank/Dead-Tank circuit breakers. These units are built to withstand the massive dielectric stresses and environmental challenges of high-voltage transmission. Our HV solutions focus on "Total Grid Stability," providing the high-speed interruption and fault-clearing capabilities required to protect national transformers and power lines. With a focus on compact design and long maintenance intervals, DSJ High Voltage gear is the invisible backbone of the modern electricity network.
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Medium-Voltage Switchgear
KYN28A-12 CE/UL Certified Metal Clad Switchgear Medium Voltage Switchgear/Switchboard
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Medium-Voltage Switchgear
KYN61-40.5 CE/UL Certified Metal Clad Switchgear Medium Voltage Switchgear/Switchboard
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Low-Voltage Switchgear
CE Certified Main Distribution Board Construction Site Switchgear/Switchboard
Electrical Partner
At DSJ, we transform complexity into reliability. With 42+ years of expertise in power distribution systems, our turnkey service integrates every phase – from regulatory compliance to final commissioning – ensuring seamless project execution for global clients. Whether it is the initial design or the final handover, we will strictly control every detail to ensure that the final delivered products perfectly meet your expectations. With us, you can focus on your core business with peace of mind, knowing that your project is in the hands of professional and reliable partners.
Introduction
The High Voltage Switchgear line from DSJ Electrical Co., Ltd is built for "System Integrity." At this level, there is no room for error. Our introduction of this series focuses on "Advanced Dielectric Engineering" and "Seismic Resilience." We provide the heavy-duty infrastructure that moves power from the generator to the city.
Innovation at DSJ involves "Intelligent Monitoring of SF6." Our GIS units feature digital density monitors that alert operators to even the smallest gas pressure changes. We prioritize "High-Speed Interruption," using advanced spring or hydraulic mechanisms that can clear faults in cycles. At DSJ, we provide these units with "Corrosion-Proof Coatings" and stainless-steel hardware to ensure they survive decades in outdoor substations. Choosing our HV gear means choosing "National-Level Reliability." We provide the "Grid Guardian." We are the "High Voltage Engineers."
Applications
- Transmission Substations: Main grid switching and protection.
- Power Plants: Generator circuit breakers and export switchgear.
- Industrial Hubs: Stepping down power for massive manufacturing clusters.
- Interconnector Stations: Linking different regional power grids.
- Heavy Rail: Primary power intake for national high-speed rail.
- Offshore Wind: HV collection platforms for sea-based wind farms.
Specifications
| Technical Category | HV Switchgear Spec |
|---|---|
| Rated Voltage | 36kV / 72.5kV / 110kV / 145kV |
| Insulation Medium | SF6 Gas (GIS) or High-Purification Air |
| Interrupting Medium | SF6 or Vacuum (Voltage dependent) |
| BIL (Impulse Level) | Up to 650kV (Standard 110kV gear) |
| Operation Type | Spring-Charge or Hydraulic Mechanism |
| Enclosure | Sealed Aluminum or Steel Alloy |
| Standard | IEC 62271-203 / GB 7674 |
Why Choose Us
DSJ Electrical is a "Transmission Specialist." We understand the complex engineering of high-voltage clearances and gas dynamics. Our HV gear is the choice of major utility companies who demand "Zero Failure" performance and a partner who can support them through the entire substation lifecycle.
- Q: Is GIS more expensive than AIS?
- A: The initial hardware cost is higher, but the total land and civil costs are significantly lower.
- Q: Do you offer installation supervision?
- A: Yes, we provide factory-certified engineers to oversee site assembly and gas filling.
Advantages
- Extreme Compactness: GIS reduces substation size by up to 90%.
- Low Maintenance: Hermetically sealed against dust, salt, and moisture.
- High Seismic Rating: Built to withstand significant earthquake loads.
- Environmental Shielding: Internal components are never exposed to the air.
- Safety: No exposed live parts, reducing risk to personnel.
- Longevity: Designed for a service life of 40+ years.
Standards & Certifications
Our HV gear is compliant with IEC 62271-203. We hold KEMA type-tests and ISO 9001. Every unit undergoes a full high-voltage power-frequency withstand test and gas leak detection.
Payment & Shipping
Payment: HV gear is shipped in large modular sections using specialized OOG (Out of Gauge) transport. Lead times: 16-24 weeks.
DSJ Story
about DSJ
Building Power, Building Trust
Founded in 1983, DSJ is a leader in China's power distribution equipment. Headquartered in Beijing as the top-selling enterprise, we integrate manufacturing with trade and maintain full in-house capabilities in R&D, production, and sales. This enables efficient fulfillment of custom orders with industry-leading speed.
As a producer of distribution system, transformer, generator and photovoltaic products exceeding Chinese/international standards, DSJ supplies medium/low-voltage electrical equipment, and PV systems. For over four decades, we have delivered high-safety electrical solutions globally to public infrastructure, corporations, and households – achieving the industry's lowest return rate.
Committed to "meeting diverse needs through quality", DSJ leverages expert teams to provide one-stop services: pre-sales consultation & customization, flexible logistics/payment options, and reliable maintenance – ensuring seamless producer-maintainer-customer collaboration.
+86 18513032986 
FLC Center, Chaoyang District, Beijing, China