What Dalian Insulator Group does

Dalian Insulator Group Co., Ltd. (大连电瓷集团股份有限公司, SZSE: 002606) is a Chinese manufacturer of porcelain and composite insulators for power transmission, founded in 1915 and headquartered with a dual structure (management HQ in Hangzhou, business HQ in Dalian). The company sells full-series, full-specification insulators covering voltages from 10kV to ±1100kV and mechanical strength ratings from 70kN to 550kN, including cap-and-pin disc, rod-type post, line composite, post composite, and hollow composite variants. Approximately 10 million pieces of annual capacity are produced across three wholly-owned manufacturing bases in Dalian (Liaoning), Pingxiang (Jiangxi), and Minqing (Fujian).

The business operates on a project-driven, hardware-sales revenue model. Domestic revenue comes from direct sales to State Grid Corporation of China and China Southern Power Grid, with multi-year UHV AC and DC transmission project deliveries (e.g., 1000kV Jindongnan-Nanyang-Jingmen, ±800kV Xiangjiaba-Shanghai, ±1100kV Changji-Guquan, and 527,612-piece supply to the Gansu-Zhejiang ±800kV DC line). International revenue flows through dedicated sales channels covering 100+ countries via G2G frameworks, Belt and Road Initiative contracts, and a May 2025 joint venture with Saudi Arabia's Union Power Company for localized production. Named international customers include Pakistan NTDC, Indonesia PLN, Sarawak Electricity, Ceylon Electricity Board, Hub Power, Meralco (Philippines), and KEC International (India).

Technology development is anchored by proprietary alumina-based high-strength porcelain formulation (commercialized since 2019), a hybrid porcelain/composite insulator (appraised December 2023), and an extreme-environment UHV fluoro-silicone rubber composite insulator co-developed with Dalian University of Technology (appraised April 2024). The Jiangxi factory integrates intelligent/digital production lines with photovoltaic power, energy storage, and EV charging infrastructure. Reported FY2024 revenue was 14.96 billion RMB with FY2023 revenue of 8.40 billion RMB, indicating project-cycle lumpiness typical of mega-infrastructure suppliers. Customer base is concentrated in two domestic grid operators plus a long tail of international utilities, with 110 years of brand heritage (Three Arrows / 三箭 trademark) and the National Quality Gold Award reinforcing incumbency.

Name

Dalian Insulator Group

Legal name

大连电瓷集团股份有限公司

Website

https://insulators.cn

Company type

Public

Founded year

1915

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Dalian Insulator Group manufactures porcelain and composite insulators for power transmission, covering 10kV to ±1100kV. It supplies State Grid, China Southern Power Grid, and 100+ international utilities across UHV AC/DC, EHV, and distribution projects from three Chinese production bases.

Ownership category

akta.pro rank

Product category

Power Transmission Insulators

NAICS

Noncurrent-Carrying Wiring Device Manufacturing (335932)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electrical Industrial Apparatus (3620)

akta.pro primary industry

Insulators (polymer, porcelain, glass; strings & line post) (EUADADAE)

akta.pro secondary industries

Transmission & Distribution Line Equipment (Bushings, Insulators, Arresters, Conductors, Hardware) (IMAGAAAF), Line Hardware & Fittings (clamps, connectors, dampers, spacers, vibration control) (EUADADAD)

Keywords

• Porcelain insulators
• Composite insulators
• Power transmission equipment
• UHV insulators
• High voltage insulation

Headquarters

HQ city

Dalian Shi

HQ country

China

HQ region

Asia

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Insulator product sales (domestic): Direct sales of porcelain and composite insulators to domestic power grid operators including State Grid Corporation of China and China Southern Power Grid. Revenue derived from supplying major UHV transmission line projects, grid upgrade contracts, and ongoing utility procurement bids. Products are priced per unit with order volumes typically in the hundreds of thousands of pieces for major projects.
2. Insulator product exports (international): Export sales of insulators to international power utilities, transmission project contractors, and government electricity authorities across 100+ countries. Includes G2G (government-to-government) project supply contracts, Belt and Road Initiative projects, and direct commercial exports. Revenue denominated in USD and local currencies with multi-year delivery schedules.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Dalian Insulator Group manufactures and sells full-series, full-specification porcelain insulators (cap-and-pin disc type, rod-type post) and composite insulators (line composite, post composite, hollow composite) for power transmission lines. Products cover voltage levels from 10kV to ±1100kV and mechanical strength ratings from 70kN to 550kN, serving power grid operators, transmission utilities, and international EPC contractors.

Product overview

Dalian Insulator Group offers a comprehensive portfolio of insulator products consisting of two core product categories: Porcelain Insulators and Composite Insulators. The porcelain insulator line includes overhead line porcelain insulators, power station post porcelain insulators, and low-voltage power distribution products. The composite insulator line includes overhead line composite insulators, post composite insulators, and hollow composite insulators. The company provides full-series, full-specification products covering voltage levels from 10kV to 1100kV, with tonnage ratings from 70kN to 550kN, serving applications across smart grids, power transmission, green buildings, intelligent manufacturing, and smart transportation. Annual production capacity reaches nearly 10 million pieces across three manufacturing bases.

Differentiator

Problem solved

Functional benefit

Brands

• 三箭 (Three Arrows): The company's trademark brand established in 1950. Used for high-voltage suspension insulators exported to the Soviet Union and later markets worldwide. Awarded National Quality Award (Gold Prize).

Products and services

• Porcelain Insulators (瓷绝缘子)

Quantifiable outcome

• Zero-carbon factory target set for '十五五' period, with 23%+ clean energy utilization currently achieved
• +3 more outcomes

Named customers10 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered core, important and minor.

• Union Power Company (沙特阿拉伯)coreStrategic or Co-development Partner · 20 May 2025On May 20, 2025, witnessed by Saudi Arabia's Ministry of Energy in Riyadh, Dalian Insulator Group and Union Power Company signed a joint venture cooperation意向书 for localized production of high-voltage suspension porcelain insulators in Saudi Arabia. Dalian Insulator is currently China's only supplier qualified to provide high-voltage suspension porcelain insulators to Saudi Arabia. This JV represents a major localization milestone and advances Dalian Insulator's globalization strategy, enhancing Saudi Arabia's domestic manufacturing capacity in traditional power sector.
• 大连理工大学电气工程学院 (Dalian University of Technology, School of Electrical Engineering)importantStrategic or Co-development Partner · 14 January 2022Dalian Insulator Group Transmission Materials Co., Ltd. and Dalian University of Technology's School of Electrical Engineering signed a Strategic Cooperation Framework Agreement on January 14, 2022. The partnership focuses on joint R&D in power transmission materials and insulator technology. The collaboration has produced the 'Extreme Environment UHV Fluoro-Silicone Rubber Composite Insulator' project, which passed scientific and technological achievement appraisal with international advanced level ratings in April 2024.
• 浙江大学 (Zhejiang University)importantStrategic or Co-development Partner · 7 July 2021Dalian Insulator Group and Zhejiang University signed a 'Green Digital Factory Cooperative R&D Project' agreement at the Dalian ShuangD Port factory on July 7, 2021. Zhejiang University's School of Mechanical Engineering provides academic research support, led by Prof. Cao Yanlong. The collaboration focuses on developing green digital manufacturing technologies and intelligent production systems for the insulator manufacturing process.
• 杭州甘霖助学基金会 (Hangzhou Ganlin Education Foundation)minorOthers · 29 July 2020Dalian Insulator Group collaborates with the Hangzhou Ganlin Education Foundation for public welfare student assistance programs. The company has established 'Dalian Insulator Ganlin Classes' in impoverished areas of Guizhou and Jiangxi provinces, supporting outstanding students from poor families. The partnership includes summer camp programs, skills training classes, and ongoing educational support since 2020.

Scale indicators14 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• NGK Insulators: Japan-based global insulator leader and Dalian's most direct international competitor. Both companies supply porcelain and composite insulators to utilities worldwide across the full voltage range, competing for the same UHV and HV transmission line tenders.
• MacLean Power Systems: US-based manufacturer of insulators, arresters, and T&D hardware serving North American and international utilities. Overlaps with Dalian in composite and porcelain insulator categories across distribution and transmission voltage classes.
• Jiangsu Shuangdeng Group: China-based power equipment and insulator manufacturer serving State Grid and Southern Power Grid with overlapping porcelain and composite insulator product lines. Directly competes with Dalian in domestic utility bidding for transmission line insulators.
• Lapp Insulators: Germany-based specialist in porcelain and composite insulators for HV/UHV transmission. Was Dalian's former joint-venture partner (Dalian Lapp Insulator Co., Ltd., 2007), giving deep familiarity with each other's technology and product positioning.
• Aditya Birla Insulators: India-based insulator manufacturer (part of Aditya Birla Group) producing porcelain insulators for HV and EHV transmission lines. Competes with Dalian in Belt-and-Road and South Asian utility tenders, including those served by India's KEC International.

Broad incumbents

• TBEA: China's largest transformer manufacturer and a major T&D equipment exporter with substantial Belt-and-Road presence. Overlaps with Dalian on UHV transmission projects (both serve State Grid) and competes for international EPC packages where insulators and transformers are jointly specified.
• Siemens Energy: Global T&D incumbent supplying transformers, switchgear, HVDC systems, and grid solutions to utilities worldwide. While not a pure-play insulator maker, Siemens procures and sometimes specifies insulator products and competes holistically for major transmission project packages alongside Dalian.
• Hitachi Energy: Global T&D leader (formerly ABB Power Grids) offering transformers, HVDC, switchgear, and grid integration. Competes with Dalian at the project-package level on UHV and HVDC transmission bids, while also influencing insulator specification and sourcing.
• ABB: Global electrification and automation major active in transmission and distribution equipment including substations and grid hardware. ABB is cited as one of Dalian's international customers/partners in transmission projects, illustrating overlap in the broader T&D ecosystem.
• China XD Electric: China-based T&D equipment giant producing transformers, switchgear, and insulators, and a State Grid-affiliated supplier. Directly competes with Dalian in domestic UHV bids and is one of the few Chinese peers with comparable scale across insulator and adjacent product categories.

Market position

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/dalian-insulator-group-co-ltd-

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Dalian Insulator Group