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Split Core Current Transformer, 10A AC, 90mm

10A AC split core current transformer has super anti-interference ability, high test stability and accuracy, 90mm jaw size, 1000:1 ratio, induction current output, suitable for lightning arrester and insulator leakage current online test.
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AC leakage sensor with split CT structure, easy to install without disconnecting the circuit under test, range 0.000mA ~ 10A AC, resolution 1uA AC, accuracy 0.5, available to connect industrial control equipment, data logger, oscilloscope, high-precision digital multimeter and other equipment.

Split core current sensor 10A

CT double shielding technology, strong anti-interference ability

  • The split core current transformer adopts CT double-layer shielding technology, with super anti-interference ability.
  • High test stability and accuracy, fearless of complex interference environments, and can accurately test the weak current of 1 microamp.
  • Open-close structure, no need to disconnect the line under test, especially suitable for online installation. Non-contact measurement is convenient, fast, and safe.
  • The range of the sensor turns ratio, output interface, etc. can be customized according to customer requirements.


High-precision split current transformers are an indispensable accessory for small, medium, and large electronic companies. The sisco slip current transformer is suitable for use in power equipment testing, communications and telecommunications, railway and oilfield monitoring, building and construction companies, research and teaching units, industrial and mining records, and other fields.  

Clamp-on current transformer applications

Measurement Range 0.000mA~10A AC
CT Size 80mm x 20mm
Resolution 1uA AC
Accuracy Class 0.5
Turn Ratio 1000:1
Phase Error ≤1°
Secondary load ≤15Ω
Dimension 165mm (L)×88mm (W)×34mm (H)
Detection Method Clamp CT 
Output Method Current Sensing Output
Output Interface 3P plug-in terminal block
Frequency 10Hz~100KHz
Wire Position The wire under test is in the centre of the jaws
Security Level   CATⅢ600V
Operating Temperature -20°C to 50°
Dielectric Strength AC3700V/rms (between core and case)
Mass 1350g


Dimension Unit (mm)

Split core current transformer 90mm dimension


Q1: What is a split-core current transformer?
A1: Split core current transformer is made of high strength PVC shell, fully cast busbar type structure. a split core current transformer is directly stuck on the cable with three sexual rubber rings against the cable and the cable one. The transformer core uses better silicon steel rolled, the secondary wire evenly wound in the core. Transformers for the open and closed structures can be installed without cutting the cable.

Q2: What is the meaning of the circles of the split core current transformer?
A2: On electrical system diagrams, a small circle is often used to represent a winding, and a circle is used to represent a winding. If you have two circles in a series, that means that the open and closed current transformer has two windings. If you have three circles in a series, that means you have three windings.

Q3: What is a split core current transformer error?
A3: Due to the structure of the split core current transformer core and material properties, the current transformer has an excitation current I0, which makes it produces errors.

Tips: What is the rated current of split-core current transformer?

Primary rated current: the load current allowed to pass through the primary winding of the current transformer. The primary rated current of current transformer used in power system is 5~25000A, and the precision current transformer used in testing equipment is 0.1~50000A. Current transformer can operate under the primary rated current for a long time, when the load current exceeds the rated current value, it is called overload, and the long-term overload operation of current transformer will burn out the winding or reduce the service life.


Thank you for buying industrial test and measurement equipment on, all products sold by sisco and the partner cover a 12 months warranty, effective from the date of receiving the products.

What is covered?

sisco is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.

What is not covered?

  • Product purchased from anyone other than a sisco store or a sisco authorized reseller.
  • Expendable parts.
  • Routine cleaning or normal cosmetic and mechanical wear.
  • Damage from misuse, abuse or neglect.
  • Damage from use of parts other than sisco approved.
  • Damage from use outside the product’s usage or storage parameters.
  • Damage from use of parts not sold by sisco.
  • Damage from modification or incorporation into other products.
  • Damage from repair or replacement of warranted parts by a service provider other than a sisco authorized service provider.
  • Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
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