CT PT Tester
Our CT PT Tester (Current Transformer and Potential Transformer Tester) is a multifunctional testing device designed to evaluate the electrical and performance characteristics of current transformers (CTs) and potential transformers (PTs) in power systems. It can perform a variety of tests, including CT volt-ampere characteristic tests, PT volt-ampere characteristic tests, CT polarity tests, PT polarity tests, CT and PT ratio tests, and CT/PT ratio error calculations at any point.The tester ensures accurate measurement, protection, and efficiency in power transmission and distribution networks.
Why Choose Us?
Our company has been specializing in the production and manufacturing of frequency series resonance devices for 21 years, with a modern intelligent factory covering over 4,000 square meters and more than 100 automated production, manufacturing, assembly, and testing equipment. We have obtained CE certification and currently serve over 20,000 customers worldwide.
Quotation within 1 hour – Solution within 24 hours - Product demonstration available - Strict contract performance
On-time delivery - 12-month warranty – Optional extended warranty - Factory acceptance testing
Authorized calibration (optional) - Worldwide training support – Regular follow-up visits
Product Features
1.Supports the testing of both CTs and PTs.
2.Capable of automatically conducting ratio, polarity, phase angle, excitation, burden, and insulation resistance tests.
3.No need for external auxiliary equipment—all test functions are integrated into a single machine.
4.Built-in high-speed mini printer for on-site printing of test results.
5.User-friendly operation with intelligent prompts to assist users.
6.Large LCD screen with a graphical display interface.
7.Automatically determines the excitation knee-point voltage in compliance with standard regulations.
8.Automatically generates 5% and 10% error curves.
9.Can store up to 3,000 test records, with data retention even after power failure.
10.Supports USB data transfer, allowing test results to be exported to a PC for report generation in WORD format.
11.Compact and lightweight (≤ 22kg), making it ideal for on-site testing.
12.Wide voltage and current range: Suitable for 5V to 1000V (PTs) and 1A to 5000A (CTs) with high accuracy.
Key Testing Functions
1. Turns Ratio and Polarity Test
Verifies the correct voltage ratio between primary and secondary windings.
Ensures correct polarity to prevent errors in metering and protection systems.
2. Excitation (Magnetization) Characteristic Test
Measures the saturation point and knee-point voltage of CTs and PTs.
Assesses the transformer's ability to handle high fault currents.
3. Burden Measurement
Evaluates the load capacity of CTs and PTs to ensure they function properly under expected circuit conditions.
4. Phase Angle and Ratio Error Measurement
Identifies phase shift between input and output to ensure accurate power measurement.
Detects errors in current and voltage transformation, which is critical for metering applications.
5. Secondary Winding Resistance Test
Measures winding resistance to detect open circuits, poor connections, or conductor degradation.
6. Insulation Resistance Test
Evaluates insulation integrity to prevent leakage currents and potential faults.
7. Demagnetization Function
Safely removes residual magnetism in CTs after testing, ensuring normal operation.
Applications of the CT PT Tester
1. Power Generation, Transmission, and Distribution
Purpose: Ensures the accurate and reliable operation of CTs and PTs in power plants, substations, and distribution networks.
Power Plants: Verifies GSU transformers and generator protection systems.
Transmission Substations: Ensures accurate metering and relay operation at high-voltage levels.
Distribution Networks: Tests pole-mounted and underground CT/PT units before installation.
2. Transformer and Equipment Manufacturing
Factory testing of newly manufactured CTs and PTs before shipment.
Ensures compliance with international standards.
Assists R&D teams in optimizing core materials and insulation design.
3. Electrical Maintenance and Troubleshooting
Diagnoses aging, insulation breakdown, and ratio errors in CTs and PTs.
Prevents metering errors, incorrect relay tripping, and power losses.
Reduces downtime by detecting faults early in industrial plants, substations, and factories.
4. Industrial and Commercial Power Systems
Ensures reliable operation of CTs and PTs in factories, hospitals, data centers, and commercial buildings.
Prevents overvoltage, inaccurate billing, and protection failures.
5. Renewable Energy (Wind, Solar, Hydro)
Tests CTs and PTs used in renewable energy grid integration.
Ensures accurate power measurement and fault detection under variable load conditions.
As one of the leading cp pt tester manufacturers and suppliers in China, we warmly welcome you to buy high-grade cp pt tester made in China here from our factory. For price consultation, contact us.