About WENZHOU HEYI ELECTRICAL CO.,LTD(HEYI)

Established in 2012, HEYI is a dynamic and flexible manufacturer specializing in advanced Current Transformers (CT) and Current Sensors. We stand at the forefront of the industry through relentless R&D and a deep commitment to bespoke, customized solutions that meet the evolving demands of the global energy landscape
Driven by market trends, our latest breakthroughs include:
EV Charging Safety: AC/DC Leakage Current Sensors specifically engineered for EV charging piles
Utility Infrastructure: Outdoor Split-core CTs designed for robust utility distribution transformer monitoring across global grids.
Global Partnership & Trust] Our engineering excellence is trusted by global technology giants and utilities, including Siemens, Schneider Electric, LG, Samsung, and SoftBank, as well as major national telecom operators and utility providers worldwide.
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World-Class Team
Graduates from top universities worldwide
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Advanced R&D
Self-developed
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Innovation Focus
Multiple innovative technologies

Our Products

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Hall Effect Current SENSOR

Hall Effect Current SENSOR

Model: C2/C3
Parameters: 6393609559

current transformer

current transformer

Model: DX/DM
Parameters: 1091752621

Three-phase current transformer

Three-phase current transformer

Model: DASN
Parameters: 5336327441

Split-Core Current Transformer

Split-Core Current Transformer

Model: KCD
Parameters: 8914185451

True RMS Current Transformer/Transmitter

True RMS Current Transformer/Transmitter

Model: KCT-L
Parameters: 3899056248

Flexible Rogowski Coil

Flexible Rogowski Coil

Model: FRC
Parameters: 4996363347

current transformer

current transformer

Model: RECT
Parameters: 5337877046

Outdoor current transformer

Outdoor current transformer

Model: LMZW
Parameters: 3462679465

Outdoor Waterproof Split-Core current transformer

Outdoor Waterproof Split-Core current transformer

Model: OCT
Parameters: 118352241X

CURRENT SENSOR

CURRENT SENSOR

Model: HYCA
Parameters: 2967192678

Busbar Split-Core Current Transformer

Busbar Split-Core Current Transformer

Model: DP/HK
Parameters: 5796925032

Split-Core Current Transformer

Split-Core Current Transformer

Model: KCT
Parameters: 5396007613

current transformer

current transformer

Model: SDH
Parameters: 3117671986

current transformer

current transformer

Model: CP
Parameters: 5155170990

current transformer

current transformer

Model: MSQ
Parameters: 6955109863

Company Gallery

factory
factory
Current transformer assembly line
Current transformer assembly line
Current transformer assembly line
Current transformer assembly line
Current transformer assembly line
Current transformer assembly line
Current transformer assembly line
Current transformer assembly line

Certifications & Awards

Certificate of Conformity (CE-RoHS)
Certificate of Conformity (CE-RoHS)
Attestation of Conformity (TÜV SÜD)
Attestation of Conformity (TÜV SÜD)
Attestation of Conformity (TÜV SÜD)
Attestation of Conformity (TÜV SÜD)
DECLARATION OF CONFORMITY (UKCA)
DECLARATION OF CONFORMITY (UKCA)
Attestation of Compliance (RoHS)
Attestation of Compliance (RoHS)
Low Voltage Directive Attestation of Conformity
Low Voltage Directive Attestation of Conformity
Declaration of Conformity (CE-LVD)
Declaration of Conformity (CE-LVD)
RoHS Test Report
RoHS Test Report
Quality Management System Certificate (ISO 9001)
Quality Management System Certificate (ISO 9001)
Type Test Report
Type Test Report
VERIFICATION OF CONFORMITY (EMC)
VERIFICATION OF CONFORMITY (EMC)
Low Voltage Directive Attestation of Conformity
Low Voltage Directive Attestation of Conformity
Type Test Report
Type Test Report
VERIFICATION OF CONFORMITY
VERIFICATION OF CONFORMITY
CE-LVD Certificate
CE-LVD Certificate
CE-LVD Certificate
CE-LVD Certificate
Metrological Verification Certificate
Metrological Verification Certificate
Verification Certificate
Verification Certificate
Calibration Certificate
Calibration Certificate
Calibration Certificate
Calibration Certificate
Certificate of Conformity
Certificate of Conformity
RoHS Verification Report
RoHS Verification Report
IP65 Test Report
IP65 Test Report

Success Stories & Case Studies

Power Utility Company, Electrical Engineering Contractor, Panel Builder, Industrial Equipment Manufacturer, Building Energy Management Integrator

Power Utility Company, Electrical Engineering Contractor, Panel Builder, Industrial Equipment Manufacturer, Building Energy Management Integrator

improved current measurement accuracy, supported stable energy metering, reduced installation difficulty in retrofit projects, enhanced electrical system monitoring, helped engineers identify abnormal load conditions
wide product range, stable accuracy, reliable insulation performance, split-core and window-type structures available, suitable for both metering and protection applications, customizable ratio and OEM logo printing

Location: TH,CL,LB,KR,AU,CR,LK,EC,MA,PH,DO,TN,BW,ZW 📦 Quantity: bulk supply for power distribution projects, switchgear retrofit projects, commercial building energy monitoring, industrial control cabinets, generator panels, and utility metering systems

Company & Product Videos

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Company Introduction & Factory Tour

⏱ Duration: 3:45 | 👁 Views: 15,230

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Product Demonstration - Kestrel K-1

⏱ Duration: 5:12 | 👁 Views: 28,450

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Technology Innovation Showcase

⏱ Duration: 4:30 | 👁 Views: 12,890

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Customer Testimonials & Success Stories

⏱ Duration: 6:20 | 👁 Views: 9,650

Ready to Transform Your Life?

Contact us immediately to learn how our products meet your needs.