What Jiangsu Shemar Electric does

Jiangsu Shemar Electric Co., Ltd. (江苏神马电力股份有限公司) is a Chinese new-materials power equipment manufacturer founded in 1996 and headquartered in Nantong, Jiangsu Province, with a global headquarters and R&D center relocated to Shanghai Hongqiao in 2016. The company is publicly listed on the Shanghai Stock Exchange Main Board under ticker 603530 since August 2019. Shemar develops, manufactures, and sells composite external insulation products for power transmission, transformation, and distribution systems, built on a core technology base of high-temperature vulcanized (HTV) silicone rubber and fiber-reinforced polymer (FRP) composites.

The product portfolio spans nine categories, including hollow composite insulators for substations, long-life line composite insulators (AC 35kV to 1000kV, DC ±400kV to ±1100kV), transmission and distribution composite cross-arms, gas-insulated composite bushings, explosion-proof composite transformer bushings, and integrated rubber sealing solutions. Products carry 30-year maintenance-free design life guarantees and are positioned to eliminate traditional failure modes such as explosion, pollution flashover, rain/ice flashover, and brittle fracture. Shemar holds 449 domestic invention patents, 242 overseas invention patents, and 520 utility model patents, and participates in or leads development of 42 external standards, including chairing IEC TC36.

The company sells primarily through enterprise field sales to power grid operators and embeds its components within the supply chains of the four major global electrical equipment manufacturers (ABB, GE Vernova, Siemens Energy, Hitachi Energy), which collectively cover 95%+ of the global OEM equipment market. Revenue is generated via project-based one-time equipment sales supplemented by integrated technical services (design, installation, after-sales). Named end customers include China State Grid, China Southern Power Grid, Eletrobras, ISA Cteep, Transelec, Redeia, and Neoenergia, with stated 95%+ market share in China's 500kV+ substation composite insulators, ~50% share in Europe and North America for substation insulation, and 83% share in Brazil in 2023. Geographic footprint covers 100+ countries via six regional sales divisions, with a Memphis-based North American subsidiary (2023) and a Phoenix, Arizona manufacturing plant planned for 2027 production.

Name

Jiangsu Shemar Electric

Legal name

江苏神马电力股份有限公司

Website

https://shemar.com.cn

Company type

Public

Founded year

1996

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Jiangsu Shemar Electric is a Chinese public-listed manufacturer of composite external insulation products (HTV silicone rubber and FRP-based insulators, bushings, and cross-arms) for power transmission, substations, and distribution, selling to global grid operators and embedding within ABB, GE, Siemens, and Hitachi Energy OEM supply chains across 100+ countries.

Ownership category

akta.pro rank

Product category

Power Transmission Equipment / Electrical Insulation Products

NAICS

Electrical Equipment Manufacturing (33531), Power, Distribution, and Specialty Transformer Manufacturing (335311), Electronic Connector Manufacturing (334417)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electrical Industrial Apparatus (3620), Adhesives & Sealants (2891)

akta.pro primary industry

Passive Components (Resistors, Capacitors, Inductors, Ferrites) (IMAGAJAA)

Keywords

• Composite electrical insulators
• Power transmission equipment
• Substation insulation products
• High voltage insulators
• Rubber sealing solutions

Headquarters

HQ city

Rugao

HQ country

China

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Composite Insulation Products Sales: Sales of composite insulation products for substations (hollow composite insulators, gas-insulated composite bushings, composite transformer bushings), transmission lines (long-life line composite insulators, transmission composite cross-arms), and distribution systems (distribution composite cross-arms, composite components).
2. Rubber Sealing Products: Sales of rubber sealing products solving power equipment oil leakage problems, including various rubber compounds (silicone rubber, nitrile rubber, EPDM, etc.)
3. Integrated Solutions and Services: Technical solutions including anti-flashover solutions and complete sealing solutions providing design, product implementation, on-site construction and after-sales service.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Jiangsu Shemar Electric manufactures composite external insulation products for power transmission, transformation, and distribution systems, including long-life line composite insulators, transmission and distribution composite cross-arms, hollow composite insulators for substations, bus post composite insulators, compact composite substation structures, gas-insulated composite bushings, and explosion-proof transformer bushings. The company also provides rubber sealing solutions for power equipment to address oil leakage and sealing issues. All products use proprietary high-temperature vulcanized silicone rubber and FRP composite materials, are designed for 30-year maintenance-free operation, and serve power grid operators and electrical equipment manufacturers globally.

Product overview

Shemar Electric is a new materials power equipment integration service provider, developing and manufacturing a comprehensive portfolio of composite external insulation products across three categories: transmission (长寿命线路复合绝缘子, 输电线路复合横担), substation (变电站空心复合绝缘子, 变电站母线支柱复合绝缘子, 紧凑型复合变电构架, 气体绝缘复合套管, 新型防爆变压器复合套管, 防闪络解决方案), and distribution (配网复合横担, 配电设备用复合外绝缘组件). The company's products cover the full voltage spectrum from 35kV AC to 1000kV AC and ±400kV to ±1100kV DC, and are unified by a shared technology base of high-temperature vulcanized silicone rubber (HTV silicone rubber) and glass fiber reinforced polymer (FRP) composites. The portfolio is complemented by 整体密封解决方案 (integrated sealing solutions) for rubber sealing needs across power equipment. All core products carry a 30-year warranty and are designed for maintenance-free operation over their full lifecycle, delivering the company's core value proposition of 'low-carbon, land-saving, reliable, and economical' new material external insulation solutions for power grids.

Differentiator

Problem solved

Functional benefit

Products and services

• Long-Life Composite Line Insulators (长寿命线路复合绝缘子) High-temperature vulcanized silicone rubber composite insulators for transmission lines covering AC 35kV to 1000kV and DC ±400kV to ±1100kV, designed for 30-year maintenance-free service life with proven application in China's UHV grid and major international UHVDC projects.
• Transmission Composite Cross-Arms (输电线路复合横担) Composite cross-arm structures that replace traditional suspension insulators in transmission towers, covering AC 35kV to 1000kV and DC ±800kV, available in single-column, single-column cable-stayed, and double-column cable-stayed configurations.
• Hollow Composite Insulators for Substations (变电站空心复合绝缘子) Glass fiber reinforced resin (FRP) hollow composite insulators that eliminate explosion, contamination flashover, rain flashover, ice flashover, and brittle fracture risks, with over 1,000,000 units applied globally.
• Bus Post Composite Insulators (变电站母线支柱复合绝缘子) Composite post insulators for bus systems in substations with over 2x bending strength compared to traditional ceramic insulators, seismic resistance up to Grade 9, 40-year design life with 30-year warranty.
• Compact Composite Substation Structures (紧凑型复合变电构架) All-composite substation structures where structural pillars are entirely composed of composite post insulators connected by low-height composite hollow insulators in a horizontal beam arrangement, achieving 15% reduction in land footprint.
• Gas-Insulated Composite Bushings (气体绝缘复合套管) Composite bushings for gas-insulated switchgear combining Shemar's hollow composite insulator technology with sealed design and optimized structure for stable electrical, mechanical, and sealing performance at various voltage levels.
• Explosion-Proof Composite Transformer Bushings (新型防爆变压器复合套管) Oil-paper capacitive composite transformer bushings featuring innovative lightweight composite materials, integrated sealing structure, and advanced capacitive core manufacturing, achieving explosion-proof, leak-free, flashover-free, and Grade 9 seismic resistance with 40-year design life.
• Flashover Prevention Solutions (防闪络解决方案) Coated umbrella skirt solutions applied to existing ceramic insulators to increase creepage distance and provide hydrophobic and hydrophobic-migration properties, solving contamination, rain, and ice flashover problems with 30-year+ service life.
• Integrated Sealing Solutions (整体密封解决方案) Comprehensive rubber sealing solutions including material selection, structural design, product manufacturing, installation guidance, and storage standards for power transmission and transformation equipment, using hundreds of rubber compound formulations (silicone rubber, nitrile rubber, EPDM).
• Distribution Composite Cross-Arms (配网复合横担) Distribution composite cross-arms that effectively increase lightning withstand voltage by 1.5x compared to iron cross-arms, eliminating flashover accidents with horizontal insulator arrangement, weighing only half of traditional angle-steel cross-arms, and providing 30-year maintenance-free service.
• Composite External Insulation Components for Distribution Equipment (配电设备用复合外绝缘组件) Composite pillar insulators for distribution equipment combining high-voltage insulator technology with large-specification, low-cost manufacturing advantages, featuring excellent UV resistance, pollution resistance, and impact resistance.

Quantifiable outcome

• Cumulative cost savings for global power grids exceeding 500 billion RMB
• +4 more outcomes

Named customers11 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

14 partnerships are on record, tiered core.

• GE (General Electric) France FactorycoreStrategic or Co-development Partner · 8 July 2025GE France factory produces high-voltage circuit breakers and generator circuit breakers. Joint visit with Jiangsu Su-Xi-Tong Science Park management committee. Discussions on capacity expansion, technology cooperation, and new gas-insulated bushing development.
• ABBcoreOEM/ Whitelabel/ Licensing PartnerABB is one of Shemar's strategic OEM partners. Shemar supplies composite insulation products that are integrated into ABB's electrical equipment. ABB represents one of the 95%+ global electrical equipment manufacturers that Shemar works with.
• GE VernovacoreStrategic or Co-development PartnerLong-term strategic partnership with GE Vernova spanning nearly 20 years. Shemar supplies insulation products and participates in GE's global projects. Multiple joint visits and cooperation discussions at GE factories in France and other locations. Received GE Best Supplier Award multiple times. Jointly exploring new gas-insulated bushing development.
• Hitachi EnergycoreOEM/ Whitelabel/ Licensing PartnerHitachi Energy is a key strategic partner. Shemar supplies composite insulation products integrated into Hitachi Energy equipment globally. Frequent technical exchanges and collaboration on power grid solutions.
• Siemens EnergycoreOEM/ Whitelabel/ Licensing PartnerSiemens Energy is one of the major global electrical equipment manufacturers that incorporates Shemar insulation products. Partnership serves customers in over 100 countries.
• Tsinghua University (清华大学)coreStrategic or Co-development PartnerCollaborative research partner on composite materials technology, FRP strength analysis, and insulation performance research. Part of Shemar's collaborative innovation with leading academic institutions.
• Xi'an Jiaotong University (西安交通大学)coreStrategic or Co-development PartnerAcademic research partner for insulation technology research and development. Collaborates on new material development and product testing.
• China Electric Power Research Institute (中国电力科学研究院)coreStrategic or Co-development PartnerNational research institute collaborating on insulation technology standards, testing methods, and new product development for power grid applications.
• China Southern Power Grid Technology Research Center (南方电网技术研究中心)coreStrategic or Co-development PartnerCollaborates on UHVDC transmission technology research and development. Multiple joint projects on insulation materials and application technology.
• Northwest Electric Power Design Institute (西北电力设计院)coreStrategic or Co-development PartnerEngineering design institute partnership for transmission line and substation composite insulation solutions development.
• Conexión Consortium (智利KILO项目联营体)coreStrategic or Co-development PartnerJoint venture between China Southern Power Grid, Transelec (Chile), and ISA (Colombia) developing the Kimal-Lo Aguirre ±600kV UHVDC project. Shemar is the exclusive supplier of transmission line insulators for the entire project.
• Eletrobras (巴西国家电力)coreChannel Partner/ Reseller/ DistributorBrazil's largest state-owned power company. Eletrobras visited Shemar facilities in 2024 for supplier audit and evaluation. Interested in CICA solutions and custom composite insulation products for Brazilian grid projects.
• IEEEcoreTechnology or IntegrationShemar actively participates in IEEE standards development. Chairman Eric Moal serves as IEC TC36 Chairman. Company contributes to IEEE PES T&D Conference and General Meeting, and participates in standard revision work.
• CIGREcoreTechnology or IntegrationActive member and contributor to CIGRE B2, B3, D1 professional committees. Cooperates with 50+ CIGRE national committees and 11 CIGRE chairpersons or secretaries general. Jointly organizes CMAPS technical exchange platform.

Scale indicators6 records

Recent moves10 records

Expansion highlights7 records

Direct peers

• Hubbell Power Systems: North American manufacturer of composite insulators, arresters, cutouts and other T&D hardware. Comparable to Shemar in that it sells composite insulator products into the same North American investor-owned utility channel that Shemar targets via its Memphis subsidiary and planned Phoenix plant.
• NGK Insulators: Japan-based global manufacturer of porcelain and composite insulators for HV transmission and substations, plus related ceramic components. Comparable to Shemar as another full-range HV insulator specialist competing for utility and OEM business at UHV voltage levels.
• Lapp Insulators: European-based HV insulator producer with both porcelain and composite offerings for substations and transmission. Comparable to Shemar as one of the few Western players with full insulator portfolios at EHV/UHV, competing on European utility tenders.
• MacLean Power Systems: US-headquartered supplier of composite insulators, poleline hardware and substation products for utilities. Comparable to Shemar as a North American composite insulator competitor whose installed base and product certifications compete directly for transmission project awards.
• Sediver: Global composite and glass insulator manufacturer serving HV and EHV transmission and substation applications. Comparable to Shemar because it markets long-life composite insulators directly to utilities and OEMs in the same voltage classes (up to UHV) and competes for similar TCO-driven replacement programs.

Broad incumbents

• GE Vernova: Global power equipment OEM and one of Shemar's four strategic OEM partners. Comparable as a broad incumbent with grid solutions, transformers and switchgear that both consume Shemar products and offer competing insulation technology.
• Siemens Energy: Global OEM of transformers, switchgear and grid technology and a long-standing Shemar OEM partner. Comparable as a broad incumbent that incorporates Shemar composite products while competing across the broader substation and transmission equipment stack.
• TE Connectivity: Diversified connector and electrical component manufacturer with significant grid solutions exposure. Comparable as a broad incumbent that supplies utility-grade electrical interconnection and insulation-adjacent components to the same customers Shemar serves.
• ABB (Hitachi Energy separation): Global electrical equipment OEM that both buys Shemar composite insulators for embedding and competes through own insulator and substation product lines. Comparable as a broad incumbent spanning transformers, switchgear and substation insulation, with overlapping capability in the same composite insulator niche.

Emerging players

• Polycast: Composite insulator and polymer products manufacturer focused on transmission and distribution applications. Comparable to Shemar as a smaller composite-insulator specialist that competes for the same grid-hardening and lightning-resistance use cases, particularly in distribution.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/jiangsu-shemar-electric-co-ltd

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Jiangsu Shemar Electric