Portable CT/PT transformer tester | current and voltage transformer analyzer | 0–1000 A | 0–2500 V | accuracy up to 0.2% | USB | LCD

Technical specifications

Product type: portable CT/PT transformer tester
Purpose: testing current transformers (CT) and voltage transformers (PT)
Overall measurement accuracy: up to ≤0.2 %
Current range: 0–1000 A
High-current output: 0–1000 A
High-current cable: 4 m, 95 mm²
Excitation voltage output: 0–2500 Vrms
Excitation current output: 0–5 Arms, up to 20 A peak value
Power supply: AC 230 V ±10 %
Frequency: 50 Hz or 60 Hz, selectable
Display: 5.6-inch LCD display with backlight
Communication interface: USB
PC control software: optional
Printer: thermal printer

Secondary winding DC resistance measurement
Measurement range: 0.1–300 Ω
Accuracy: ≤0.2 %
Dimensions: 400 x 250 x 250 mm
Weight: ≤22 kg
Operating temperature: from -10 °C to +50 °C
Storage temperature: from -40 °C to +70 °C
Relative humidity: ≤95 %, non-condensing
Operating altitude: up to 2000 m above sea level

Secondary actual burden measurement
Measurement range: 0.1 VA – 1000 VA
Accuracy: ≤0.2 %

CT/PT phase error measurement
Accuracy: ±4 min
Resolution: 0.01 min

CT ratio error measurement
Measurement range: up to 25000 A / 5 A or 5000 A / 1 A
Accuracy: ≤0.2 %

PT ratio error measurement
Measurement range: 1–500 kV
Accuracy: ≤0.2 %

Functions

CT current transformer testing – checks the operation, accuracy and technical condition of current transformers
PT voltage transformer testing – allows checking the ratio and measurement error of voltage transformers
Ratio error measurement – shows whether the CT/PT transformer accurately transfers the measured current or voltage
Phase error measurement – helps evaluate phase shift, which is important for electricity metering and protection systems
Secondary winding DC resistance measurement – allows checking the condition of the winding, wires and contacts
Secondary burden measurement – determines the actual load of the transformer secondary circuit in VA
Excitation characteristic testing – helps evaluate the condition of the CT transformer core and saturation point
High-current test up to 1000 A – allows primary current tests to be carried out under conditions closer to real operating conditions
USB data transfer – enables measurement results to be transferred to a computer
Result printing – the thermal printer allows quick printing of test results on site

Use

For energy companies: Suitable for electricity network operators, substation maintenance specialists and energy companies that regularly test current and voltage transformers. The device helps evaluate the accuracy of measuring circuits, metering reliability and the technical condition of transformers.

For electricians: The tester is useful when installing or checking metering cabinets, current transformers, meter circuits, relay protection systems and industrial electrical panels. The device allows faster detection of incorrect wiring, burden mismatch or transformer error.

For engineers and maintenance specialists: Helps perform preventive tests, operational measurements, fault diagnostics and preparation of technical reports. The USB interface and PC software allow convenient storage of test data.

For metrology and testing laboratories: Due to accuracy up to 0.2 %, ratio and phase error measurement functions, the device can be used in laboratories where precise CT/PT transformer analysis, comparative tests and reporting are required.

For industrial companies: Useful for checking electrical metering of production equipment, transformer substations, distribution panels, protection circuits and energy monitoring systems.

Advantages

Tests both CT current transformers and PT voltage transformers
High-current output up to 1000 A
Excitation voltage output up to 2500 Vrms
Wide operating temperature range from -10 °C to +50 °C

Disadvantages

Due to high test voltages and currents, the device must only be used by qualified specialists
Weight up to 22 kg – transportable, but not very lightweight

FAQ

What is this tester intended for?

This tester is intended for testing current transformers (CT) and voltage transformers (PT). It is used to check ratio error, phase error, secondary winding resistance, burden, excitation characteristics and other transformer parameters.

Is this device suitable for checking electricity metering transformers?

Yes, the device is suitable for checking CT and PT transformers used in electricity metering systems. It allows evaluating whether the transformers accurately transfer measured parameters to meters, protection relays or measuring equipment.

What is the maximum output current of this tester?

The high-current output is 0–1000 A, so the device can be used for primary current tests and professional CT transformer analysis.

Is the device suitable for outdoor use?

The device can operate at temperatures from -10 °C to +50 °C and up to 95 % relative humidity without condensation, but it is not a sealed device designed for outdoor conditions. When used outdoors, it must be protected from rain, dust, condensation and mechanical damage.