Q125B Cable 125mm 3000A Split core Square Bus bar AC Current Probe

3000A Split core Busbar AC Current Probe

The Q125B split core current probe is a high performance AC Current clamp with excellent transformation and low phase shift. The high quality magnetic core and uniform windings provide for accurate measurements up to 1000A AC/2000A AC/3000A AC. The Round jaw permits 125mm cable positionings. Provide excellent TRMS capabilities and reliable signal reproduction, with harmonic measurement. It is widely applied in electricity, communication, meteorology, railway, oilfield, construction, measurement, scientific and research teaching unit, industrial and mining enterprises. EN 61010-1, EN 61010-2-032, IEC61869-2 Standard. This model Q125B has been used many for cable fault analyzer of instruments company.



  • Cable fault tester;
  • Power quality analyzer;
  • Power and harmonic meters;
  • Power load monitoring;
  • Large industrial loads;
  • Data logging/recording;
  • Measuring around cable bundles;
  • Leakage current measuring meter;
  • Power meter;
  • Electrical utility;
  • HVAC;
  • Industrial maintenance;
  • Electrical Laboratory;
  • Plant maintenance;
  • Power quality monitoring;
  • Oscilloscopes;
  • Calibration instrument on site;
  • Digital multi-meter;


  • Holding wire diameter: φ125mm;
  • Measurement range of 1A to 3600A AC;
  • Large jaw opening designed;
  • High precision 0.2% for current measurement;
  • Low phase shift for power measurement;
  • Nominal range: 1 to 1000AAC, 1 to 2000AAC, 1 to 3000AAC;
  • Transformation ratio: 1000:5, 2000:5, 3000:5, 1000:1, 2000:1;
  • Output:5mA AC/A AC, 2.5mA AC/A AC, 1.666mA AC/A AC;
  • Frequency 40Hz-20KHz Bandwidth;
  • Improved ergonomic design & easy operation;
  • High content permalloy core;
  • Conforms to EN 61010, 600V CAT III;
  • Industrial design & beautiful appearance;
  • Designed for recorders, loggers, oscilloscopes, power and harmonic meters;
  • UL, CE CNAS mark;


Electrical parameters
Ratio 1000: 1 or 2000:1 (customized)
Accuracy class 0.2%, 0.5%, 1%
Primary current 0 - 1000A, 0 - 2000A, 0 - 3000A AC
Secondary current 0 - 1A, 0 - 2A, 0 - 5A AC (customized)
Max. Cont. Input current 3600A
Over voltage category CAT III 600V
Output signal (AC current) 500mA,1A,2A,5A AC at nominal input current
Output signal (AC voltage) 333mV, 500mV, 1V, 5V 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
Mechanical parameters
Dimensions (L x W x H) (mm) 180 x 319 x 35
Weight (g) 1100
Holding wire diameter (mm) φ125
Max. jaw opening (mm) 125
Jaw color Black
Material PC+ABS, UL94 V0


Model Rate Current Max Current Secondary Coil Ratio Burden Resistance Accuracy
Q125BA5-200 200A 240A 5A 40:1 2.5VA 0.5%
Q125BA5-300 300A 360A 5A 60:1 2.5VA 0.5%
Q125BA5-400 400A 480A 5A 80:1 2.5VA 0.5%
Q125BA5-500 500A 600A 5A 100:1 2.5VA 0.5%
Q125BA5-600 600A 720A 5A 120:1 2.5VA 0.5%
Q125BA5-800 800A 960A 5A 160:1 2.5VA 0.5%
Q125BA5-1000 1000A 1200A 5A 200:1 2.5VA 0.5%
Q125BA5-1500 1500A 1800A 5A 300:1 2.5VA 0.5%
Q125BA5-2000 2000A 2400A 5A 400:1 2.5VA 0.5%
Q125BA5-3000 3000A 3600A 5A 600:1 2.5VA 0.5%
Q125BA1-100 100A 120A 1A 100:1 customized 0.2%
Q125BA1-200 200A 240A 1A 200:1 customized 0.2%
Q125BA1-300 300A 360A 1A 300:1 customized 0.2%
Q125BA1-400 400A 480A 1A 400:1 customized 0.2%
Q125BA1-500 500A 600A 1A 500:1 customized 0.2%
Q125BA1-600 600A 720A 1A 600:1 customized 0.2%
Q125BA1-800 800A 960A 1A 800:1 customized 0.2%
Q125BA1-1000 1000A 1200A 1A 1000:1 customized 0.2%
Q125BA1-2000 2000A 2400A 1A 2000:1 customized 0.2%
Q125BA1-3000 3000A 3600A 2A 1500:1 customized 0.2%
Q125BA2-500 500A 600A 250mA 2000:1 customized 0.2%
Q125BA2-1000 1000A 1200A 500mA 2000:1 customized 0.2%
Q125BA3-500 500A 600A 200mA 2500:1 customized 0.2%
Q125BA3-1000 1000A 1200A 400mA 2500:1 customized 0.2%
Q125BA4-250 250A 300A 250mA 1000:1 customized 0.2%
Q125BA4-500 500A 600A 500mA 1000:1 customized 0.2%
Q125BA4-1000 1000A 1200A 250mA 4000:1 customized 0.2%
Notes: Can be customized current probe according to user requirements!

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