Q50A 1000A Ratio customised AC clamp on ct current transformer

clamp on ct curren transformer

The model Q50A clamp on current transformer is designed for fast and easy measure the current in industrial and power environment, it has wide range of current measurement from 1mA to 1200A, high precision 0.1%, low phase shift, wide frequency from 10Hz to 200KHz, with harmonics measurement function, easy operation for measurement instruments. Meet EN61010-2-032 standard.



Q50A current transformer clamp have many kinds of versions, for example 200A/300A/500A/1000A etc. The Q50A series AC clamp on cts are designed to extend the current measuring capabilities of DMMs, 4m banana or BNC, power instruments, oscilloscopes, hand-held scopes, recorders or loggers, clamp type grounding resistance tester, double clamp phase angle meter, energy meter calibrator and other diverse instruments.


  • High precision 0.1% for current measurement;
  • Measurement range of 1mA to 1000A AC;
  • Low phase shift for power measurement;
  • Frequency 10Hz-200kHz Bandwidth;
  • Improved ergonomic design & easy operation;
  • High content permalloy core;
  • Holding wire diameter: φ50mm;
  • Conforms to EN 61010, 600V CAT III;
  • Industrial design & beautiful appearance;
  • Designed for recorders, loggers, oscilloscopes, power and harmonic meters;
  • UL, CE CNAS mark;


  • Power quality analyzer;
  • Power and harmonic meters;
  • Electric energy meter tester (on site);
  • Cable fault analysis;
  • Power load monitoring;
  • Data logging/recording;
  • Phase volt-ampere meter;
  • Measuring around cable bundles;
  • Power meter;
  • Large industrial loads;
  • Power quality monitoring;
  • CT secondary current detection;
  • Oscilloscopes meter;
  • Earth resistance meter;
  • Energy sub-meters;
  • Digital multi-meter;
  • Multi-function energy meter;


Electrical parameters
Ratio 1000: 1 or 2000:1 (customized)
Accuracy class 0.1%, 0.2%, 0.5%
Primary current 0 - 1000A AC
Secondary current 0-1A AC, 0 - 5A AC (customized)
Max. Cont. Input current 1200A
Load capacity ≤20Ω, standard 4Ω
Over voltage category CAT III 600V
Output signal 500mA,1A,5A AC at nominal input current
Frequency range 40Hz-20kHz
Dielectric strength 3KV 50Hz/60Hz at 1 minute
Temperature range -20°C to +55°C
Output 2.5 meter cable with D01 connector
Max. voltage not insulated conductors 720 V
Standard EN 61010-1, EN 61010-2-032, EN 61010-2-031
IEC60044-1, & IEC61869-2, 600V CAT III
Installation Clamp type
Output mode Lead output (2.5m)
Connector BNC, 4mm banana, signal cable(2 cores),customized
Accuracy (1000A Range)
0-10A ≤0.5%
10-100 ≤0.2%
10-1000A ≤0.1%
Phase Shift(1000A Range)
0-10A ≤0.5°
10-100 ≤0.2°
10-1000A ≤0.1°
Mechanical parameters
Dimensions (L x W x H) (mm) 102.9 x 219.6 x 28
Weight (g) 550
Holding wire diameter (mm) φ50
Max. jaw opening (mm) 50
Jaw color Blue or grey
Material PC+ABS+Polycarbonate, UL94 V0


Model Rate Current Max Current Secondary Current Coil Ratio Burden Resistance Accuracy
Q50A5-200 200A 240A 5A 40:1 2.5VA 0.5%
Q50A5-300 300A 360A 5A 60:1 2.5VA 0.5%
Q50A5-400 400A 480A 5A 80:1 2.5VA 0.5%
Q50A5-500 500A 600A 5A 100:1 2.5VA 0.5%
Q50A5-600 600A 720A 5A 120:1 2.5VA 0.5%
Q50A5-800 800A 960A 5A 160:1 2.5VA 0.5%
Q50A5-1000 1000A 1200A 5A 200:1 2.5VA 0.5%
Q50A1-100 100A 120A 1A 100:1 customized 0.2%
Q50A1-200 200A 240A 1A 200:1 customized 0.2%
Q50A1-300 300A 360A 1A 300:1 customized 0.2%
Q50A1-400 400A 480A 1A 400:1 customized 0.2%
Q50A1-500 500A 600A 1A 500:1 customized 0.2%
Q50A1-600 600A 720A 1A 600:1 customized 0.2%
Q50A1-800 800A 960A 1A 800:1 customized 0.2%
Q50A1-1000 1000A 1000A 1A 1000:1 customized 0.1%
Q50A2-250 250A 300A 250mA 1000:1 customized 0.1%
Q50A2-300 300A 360A 300mA 1000:1 customized 0.1%
Q50A2-500 500A 600A 500mA 1000:1 customized 0.1%
Q50A2-1000 1000A 1000A 500mA 2000:1 customized 0.1%
Q50A3-500 500A 600A 200mA 2500:1 customized 0.1%
Q50A3-800 800A 960A 400mA 2000:1 customized 0.1%
Q50A3-1000 1000A 1000A 400mA 2500:1 customized 0.1%
Q50A4-500 500A 600A 250mA 2000:1 customized 0.1%
Q50A4-1000 1000A 1000A 250mA 4000:1 customized 0.1%
Q50A6-1000 1000A 1000A 200mA 5000:1 customized 0.1%

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