Residual CT Series: Flexible Installation, Superior Balance

Fast Installation

High Accuracy

Full Range

High Precision Residual CT

Suitable for cable circuit environments, with a compact structure, flexible installation, and multiple rectangular opening sizes from 110mm to 400mm.

 

Supports main circuit currents from 63A to 2000A, meeting different application requirements for residual current monitoring and protection.

 

Features high precision, excellent balance characteristics, and low unbalanced current output, effectively reducing false alarms caused by electromagnetic interference.

Application scenarios

Motor Control

Industrial motor control system

Power Distribution

High and low voltage distribution cabinet & power distribution room

Renewable Integration

PV & wind power new energy grid connection

Energy Monitoring

Building & park energy consumption metering management

Automation Control

Inverter and automatic industrial control equipment

Grid Protection

Substation and power relay protection

Technical Overview and Performance Data

Maximum Withstand Voltage
0.66kV
Rated Primary Current
0A ~ 300kA
Rated Secondary Output
With integrator:
4V / 1A (AC) or 4–20mA (DC)
Without integrator:
100mV/kA, 50mV/kV
Accuracy
1%

10%-100% Accuracy
5% (without integrator) 1% (with integrator, 45-65HZ)

Phase error
W+1°(45-65HZ) W+10°(20KHZ)
Auxiliary Power Supply
±12V, 24V, 5V DC or 220V AC
Power Consumption
≤10W
Operating Frequency
1Hz – 1MHz
Note: Other specifications can be customized according to customer requirements.
 
Performance Index
10%-100% Accuracy
5% (without integrator) 1% (with integrator, 45-65HZ)
Phase error
W±1° (45-65HZ) W±10°(20KHZ)
10%-100% Linearity
0.50%
Integrator power supply
7-30VDC
Response bandwidth
1HZ-1MHZ
Coil section diameter
W7.5、W10、W12mm or Custom made
Coil length
W2M or Custom made
Use altitude
W2000M
Protection level
IP65
Texture of material
Silicon rubber
Secondary lead
Shielded wire,length customized
Compressive strength
2KVAC/min
Insulation resistance
DC500V/100MQ
Electrical Parameters
Working frequency50~400Hz
Rated input10mA~5A
Measuring range10%In~130%In
Rated output0-1V or 0-0.5mA
Ratio difference≤+0.1%
Phase difference≤+10 points
Dielectric strength2.5KV/1mA/1min
Insulation resistanceDC500V/1000MΩ /min
Mechanical Parameters
ShellABS, Flame retardant grade 94-V0
SkeletonPBT
Iron coreNickel or nanocrystalline
Intermal structureEnvironment friendly epoxy resin casting
Construction planScrew fixation
Working temperature-12°C~+45°C
Ambient humidity≤85%
Connection modeTerminal type / shielded strand 1.5m

Note:  Other specifications can be customized according to the specific requirements of customers.

Outline and Installation Dimensions

Model and Specification Rated Input Rated Output Accuracy Class Dimensions (mm)
A B K F C D G
CT-1125 0~1A 0~1V
(0.5mA)
0.1
0.2
0.5
1.0
185 76 110 25 28 173.5 M6
CT-1535 231 86 150 35 32 217 M6
CT-1935 271 86 190 35 32 257 M6
CT-2445 327 102 240 45 35 313 M6
CT-3045 387 102 300 45 35 373 M6
CT-3545 437 102 350 45 35 423 M6
CT-4045 487 102 400 45 35 473 M6

Certificates & Accreditation

We proudly showcase our enterprise honors and management system certifications, reflecting our commitment to quality, reliability, and industry excellence. These certificates demonstrate our dedication to maintaining high standards in all aspects of our operations.

           

Equipment Image Information

Explore detailed images of our equipment, showcasing the advanced technology, precision engineering, and robust build quality that support our high-performance operations. Each image is accompanied by informative descriptions to provide a comprehensive understanding of our machinery.

Fully automated sensor core continuous tunnel heat treatment furnace production line

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8 fully automatic high-speed & 14 continuous precision stamping presses

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24 Fully Automatic Magnetic Core Winding Machines

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6 Fully Automated Sensor Core Continuous Tunnel Heat Treatment Furnace Production Lines

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6 Fully Automatic Testing & Sorting Machines

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2 Solenoid (Tripper) Manufacturing Lines

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6 Fully Automatic Magnetic Core Packaging Machines

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260 Fully Automatic Winding Machines

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8 fully automatic current transformer potting machines

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2 Current Transformer Assembly Lines

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Winding Production Line Workshop 2

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6 Fully Automatic Magnetic Core Testing Machines

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Large Magnetic Core Continuous Furnace

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Strip Slitting & Cutting Production Line

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5 Fully Automatic Ultra-Microcrystalline Heat Treatment Lines

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Technology Dept / R&D Center / Material Testing

Discover our Technology Department, R&D Center, and Material Testing facilities through detailed images. These showcase our commitment to innovation, rigorous research, and precise material analysis, ensuring the highest quality and reliability in every product we develop.

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About Us

Jiangyi Yucheng Electric, Jiangsu, China, makes current sensors and smart meters for global power and industrial applications, offering reliable, high-accuracy, standards-compliant solutions.

Contact Info

No.5 Tongxin Road, Qingyang Town,Jiangsu,China