SKHSI-12 Solid Insulated Ring Network Switchgear

SKHSI-12 is an environmentally friendly solid-insulated ring network switchgear developed for 12kV medium-voltage distribution systems. It adopts advanced epoxy resin solid insulation technology to fully encapsulate live parts, completely replacing traditional SF6 gas insulation. With gas-free, pollution-free, compact modular structure and integrated switching functions, the equipment features high safety and strong environmental adaptability. It is widely used for ring network power supply, line branching and terminal power distribution in urban grid renovation, commercial buildings, residential communities, industrial parks and municipal new energy projects.

Customize from Our Standard Product Line

If you spot a near-match in our catalog, we can quickly modify our standard transformers for your application. Adjustments cover capacity, voltage class, cooling type and installation structure.

Build per Your Technical Documents

Send us your specifications or drawings. Our engineering team reviews the design, validates all key parameters with you, and manufactures strictly in accordance with international standards.

Full Custom Design from Concept to Completion

Without formal detailed specs? Share your ideas and functional requirements. We partner with you to develop fully customized transformer solutions, from electrical design and structural layout through to insulation system.

Overview
Product Overview
Application
FAQ
Transportation Services & Process

Overview

Compliance Standards
● International Standards: Compliant with IEC 62271‑200, IEC 62271‑102 and IEC 62271‑1 global general specifications for high‑voltage switchgear and controlgear.
● National Standards: Strictly designed, manufactured and tested in accordance with GB 3906 and GB/T 11022 technical requirements for AC metal‑enclosed switchgear.
● Quality Standard: Meets international power distribution safety regulations, environmental protection criteria and dielectric performance test standards, suitable for global green power grid construction projects

Operating Conditions
● Installation Environment: Indoor fixed installation, applicable for conventional distribution rooms, compact power stations and urban underground power distribution spaces.
● Ambient Temperature: ‑10°C ～ +40°C, adaptable to regular outdoor and indoor temperature changes without extreme overheating or freezing.
● Humidity Condition: Maximum relative humidity ≤95%, no condensation, frost or moisture accumulation on insulated components.
● Altitude Range: Standard applicable altitude ≤1000m; customized insulation reinforcement is available for high‑altitude areas.
● Site Environment: Free from explosive dust, corrosive gas, severe vibration and strong electromagnetic interference; suitable for humid, dusty and urban polluted working conditions

Bardeen presents the SKHSI‑12 solid insulated switchgear, an advanced solution engineered for modern distribution networks, renewable integration, and urban power reliability. The SKHSI‑12 solid insulated switchgear represents a step change in safety, environmental responsibility, and operational intelligence. As utilities and private networks seek SF6‑free distribution alternatives and resilient smart grid switchgear platforms, the SKHSI‑12 embodies a robust, compact, and maintenance‑light choice for ring network switchgear deployments worldwide.

Product Overview

Product Overview & Technical Advantages

Product Overview and Features
The SKHSI‑12 solid insulated switchgear is designed as a fully enclosed, modular unit for medium‑voltage distribution systems. This ring network switchgear employs solid insulation technology to eliminate gas‑based dielectric media, positioning the SKHSI‑12 as a leading SF6‑free distribution option. The solid insulated switchgear design reduces lifecycle environmental impact while maintaining dielectric reliability and arc‑quenching performance comparable to traditional approaches.

Core Technical Advantages
- SF6‑Free Distribution: The SKHSI‑12’s solid insulated switchgear construction removes dependence on SF6 gas, addressing regulatory pressure and sustainability targets. With SF6‑free distribution design, operators benefit from reduced greenhouse gas risk, simplified handling requirements, and lower end‑of‑life disposal complexity.
- Compact Modularity: As a ring network switchgear, the SKHSI‑12 occupies minimal footprint in substations and compact secondary substations, enabling cost‑effective siting in urban, commercial, and renewable energy projects. Its modular sections allow flexible configuration for feeders, transformers, and protection elements.
- Enhanced Safety and Reliability: The solid insulated switchgear technology used in the SKHSI‑12 significantly improves personnel safety by providing robust insulation barriers and reduced internal fault propagation. The ring network switchgear layout supports selective protection and rapid isolation to minimize outage scope.
- Intelligent Protection and Control: The SKHSI‑12 is designed as a smart grid switchgear platform, complete with integrated digital protection relays, distributed automation capabilities, and standardized communications (IEC 61850 or equivalent).

Safety, Testing, and Certification
Bardeen engineers validate the SKHSI‑12 solid insulated switchgear with rigorous type and routine testing, including dielectric, temperature rise, mechanical endurance, and internal arc withstand tests as applicable. The SKHSI‑12 is engineered to meet international standards for medium‑voltage switchgear performance and safety, ensuring compliant deployment across varied jurisdictions.

Core Merits
● Green & Eco‑Friendly: Adopts full solid insulation structure without SF6 gas, eliminating greenhouse gas emissions, fully complying with global environmental protection and low‑carbon grid standards.
● Ultra‑high Safety & Reliability: All live parts are completely encapsulated by high‑strength epoxy resin, with excellent anti‑flashover, anti‑creepage and anti‑external interference performance, effectively avoiding electric leakage and arcing risks.
● Maintenance‑Free Operation: Gas‑free solid structure requires no regular gas detection, inflation or leakage maintenance, greatly reducing daily operation costs and improving equipment stability.
● Compact & Wide Adaptability: Miniaturized modular design saves installation space, with strong tolerance to humidity, dust and salt fog, perfectly adapting to complex urban and industrial power distribution scenarios.

Application

Application Scenarios

Urban compact substations and underground power distribution rooms.

Renewable energy stations requiring SF6‑free low‑carbon switchgear solutions.

Commercial & industrial parks and dense downtown ring‑main network projects.

Places with high environmental requirements: humid, dusty, salt‑fog coastal areas.

Overseas smart‑grid projects for SF6‑free medium‑voltage distribution.

FAQ

Frequently Asked Questions

Q1: What is a metal‑clad withdrawable switchgear? What are its main features?A: A metal‑clad withdrawable switchgear (such as the KYN series) is a fully enclosed, fully compartmentalised power distribution device. Its distinctive feature is that the busbar compartment, circuit breaker compartment, cable compartment, and instrument compartment are independently separated from each other, with each compartment using metal partitions that are grounded and shielded. The core advantages are: the withdrawable circuit breaker trolley can be flexibly pulled out, facilitating online inspection, maintenance, or rapid replacement, which greatly reduces outage time. At the same time, the strict compartmentalised design effectively limits the scope of internal fault arc hazards, enhancing operational safety.

Q2: What is the "five‑prevention interlocking" function of a switchgear, and why is it important?A: The "five‑prevention interlocking" is a mandatory mechanical or electrical interlocking device that ensures operator safety and reliable equipment operation. It includes:
Preventing incorrect opening or closing of the circuit breaker;
Preventing opening or closing of the disconnector (i.e., the trolley) under load;
Preventing the closing of the earthing switch when the equipment is live;
Preventing the closing of the circuit breaker when the earthing switch is closed (i.e., with an earth connection);
Preventing inadvertent entry into live compartments.
This design physically eliminates the possibility of human misoperation and is a core requirement of electrical safety regulations.

Q3: How do I choose between fixed‑type and withdrawable (trolley‑type) switchgear based on project requirements?A: The choice mainly depends on the requirements for power supply reliability and maintenance efficiency
Withdrawable type (e.g., KYN series): Recommended for critical loads, applications requiring frequent operation, or scenarios demanding rapid fault recovery (such as large factories and data centres). The circuit breaker trolley can be kept as spare inventory; in case of a fault, it can be directly replaced as a whole, restoring power very quickly.
Fixed type (e.g., GGD, XGN series): Suitable for applications with stable loads and less stringent outage time requirements (such as general building power distribution). They have a simpler structure and relatively lower cost, but maintenance typically requires an overall busbar outage.

Transportation Services & Process

1. Heavy‑Lift & OOG Expertise

Specialized handling for Over‑Out‑of‑Gauge (OOG) cargo. We manage the entire process for heavy transformers, from custom crating and vacuum packaging to flat‑rack, break‑bulk, or Ro‑Ro shipping.

2. Customs & Compliance Management

Expert handling of complex export/import documentation, HS codes, and destination country regulations. We ensure smooth customs clearance to avoid costly delays.

3. Real‑Time Visibility & Risk Control

24/7 GPS tracking and milestone updates. Comprehensive cargo insurance covering all risks from origin warehouse to destination site.

4. Emergency Response

Prioritized air freight and expedited sea options for critical breakdowns. We minimize downtime by getting your replacement transformer or parts there faster.

Process

Assessment & Planning

We analyze the dimensions, weight, and route to design the optimal transport plan.

Professional Packaging

Seaworthy packing