About HEYI ELECTRICAL

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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Split-Core Hall Effect Current Sensor 0-1000A with 5A Output and Zero/Span Adjustment

Split-Core Hall Effect Current Sensor 0-1000A with 5A Output and Zero/Span Adjustment

Model: C2/C3
Parameters: 6955441965

Precision Hall Effect Current Sensor 0-1000A with 5A Output and 0.5 Accuracy

Precision Hall Effect Current Sensor 0-1000A with 5A Output and 0.5 Accuracy

Model: C2/C3
Parameters: 2040386505

Utility Grade Hall Effect Current Sensor 0-1000A Split-Core for Energy Metering

Utility Grade Hall Effect Current Sensor 0-1000A Split-Core for Energy Metering

Model: C2/C3
Parameters: 9507373225

DM-20 20mm Window Mini Current Transformer 0.66kV Low Voltage CT

DM-20 20mm Window Mini Current Transformer 0.66kV Low Voltage CT

Model: DX/DM
Parameters: 721843066X

DX Current Transformer 0.66kV DIN-Rail Mounted Up to 6000A for Smart Grid

DX Current Transformer 0.66kV DIN-Rail Mounted Up to 6000A for Smart Grid

Model: DX/DM
Parameters: 4070360166

DASN242 60-5A to 250-5A 3-in-1 Three Phase Current Transformer

DASN242 60-5A to 250-5A 3-in-1 Three Phase Current Transformer

Model: DASN
Parameters: 5628230421

HCT2851 0-1000A Three Phase Current Transformer with 5A Output

HCT2851 0-1000A Three Phase Current Transformer with 5A Output

Model: DASN
Parameters: 4499862957

Compact DIN-Rail Three Phase Current Transformer for Smart Buildings

Compact DIN-Rail Three Phase Current Transformer for Smart Buildings

Model: DASN
Parameters: 4728972399

0-1000A Split-Core Current Transformer with RS485 Modbus RTU Output for Energy Monitoring

0-1000A Split-Core Current Transformer with RS485 Modbus RTU Output for Energy Monitoring

Model: KCD
Parameters: 9872676259

Split-Core True RMS Current Transformer with 4-20mA Output

Split-Core True RMS Current Transformer with 4-20mA Output

Model: KCT-L
Parameters: 0225799847

Flexible Rogowski Coil 100-10000A Split Core FRC-350-G1 with Integrator

Flexible Rogowski Coil 100-10000A Split Core FRC-350-G1 with Integrator

Model: FRC
Parameters: 588771316X

0.15S Revenue-Grade Resin CT 1000A IEC 61869-2

0.15S Revenue-Grade Resin CT 1000A IEC 61869-2

Model: RECT
Parameters: 2874309095

Anti-Saturation Resin CT 1000A IP65 Utility Metering

Anti-Saturation Resin CT 1000A IP65 Utility Metering

Model: RECT
Parameters: 7294227195

IP65 Outdoor Resin-Cast Current Transformer for RMU and Marine Applications

IP65 Outdoor Resin-Cast Current Transformer for RMU and Marine Applications

Model: LMZW
Parameters: 1578901146

Hydrophobic Epoxy Insulated Outdoor Current Transformer for Chemical and Metallurgy

Hydrophobic Epoxy Insulated Outdoor Current Transformer for Chemical and Metallurgy

Model: LMZW
Parameters: 0747080631

IEC 61869-2 Certified Outdoor Resin-Cast Current Transformer for Global Power Distribution

IEC 61869-2 Certified Outdoor Resin-Cast Current Transformer for Global Power Distribution

Model: LMZW
Parameters: 1069030139

IP65 Outdoor Split-Core Current Transformer for Overhead Line Monitoring

IP65 Outdoor Split-Core Current Transformer for Overhead Line Monitoring

Model: OCT
Parameters: 6403914286

6mA DC Leakage Current Sensor HYCA-01 for EV Charger

6mA DC Leakage Current Sensor HYCA-01 for EV Charger

Model: HYCA
Parameters: 7261506524

Compact AC/DC Sensitive Residual Current Monitor HYCA-03

Compact AC/DC Sensitive Residual Current Monitor HYCA-03

Model: HYCA
Parameters: 4810259978

High Load Current AC/DC Residual Current Sensor HYCA-08

High Load Current AC/DC Residual Current Sensor HYCA-08

Model: HYCA
Parameters: 0690713401

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

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