CT PT Characteristic Tester

The UHV-105A CT PT Characteristic Tester utilizes imported core components and precision manufacturing processes, ensuring stable and reliable product performance. The instrument panel features an ergonomic design for simplified operation, enabling a single-operator setup to complete all testing procedures. Its powerful software automatically calculates and delivers test results. Equipped with built-in USB data transfer functionality, it seamlessly integrates with PC software to generate comprehensive test reports, facilitating efficient data management and significantly reducing the workload for testing personnel. The instrument includes a built-in thermal micro-printer for immediate hardcopy output of test data and curves. This fully-featured professional testing instrument is highly regarded in both laboratory and field settings for its robust capabilities.

1.Preventive Testing / Periodic Calibration:

This is the primary application. According to power equipment preventive testing regulations, in-service CTs and VTs require periodic verification to ensure measurement accuracy and protection reliability. This instrument can complete multiple critical tests in one go, avoiding the complexity of using multiple separate devices.

2.New Equipment Installation Acceptance:

Newly purchased or installed CTs/VTs must undergo comprehensive performance testing before commissioning to verify compliance with design specifications and contract requirements, ensuring the safety and stability of the grid from the outset.

3.Fault Diagnosis and Post-Maintenance Testing:

When protection relays malfunction (misoperation or failure to operate) or metering systems show abnormalities, it is necessary to investigate whether the instrument transformers are at fault (e.g., inter-turn shorts, reversed polarity, performance degradation). This instrument enables rapid fault localization.

After maintenance (e.g., winding replacement, insulation treatment), instrument transformers must be tested to confirm restored or compliant performance.

4.Condition Assessment and Life Prediction:

Data obtained from periodic tests-such as excitation characteristic curves and ratio errors-can be used to analyze the aging degree, insulation condition, and magnetic property trends of instrument transformers, supporting decisions for condition-based maintenance and replacement.

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