The KT220 Handheld CT/PT Analyzer by Wrindu is a high-precision, portable testing system designed for on-site verification of current and potential transformers. With a 10.1-inch HD touchscreen, lightweight 3.5 kg design, and built-in replaceable battery, it ensures fast, accurate measurements, automatic demagnetization, and seamless PC integration. The analyzer supports IEC, IEEE, and ANSI standards, optimizing efficiency and safety in power system testing.
How Does the KT220 Improve CT/PT Testing Accuracy?
The KT220 ensures precise measurements by accounting for nominal and operational burdens, offering up to 0.05% accuracy for CT ratio and phase-angle evaluation. It can measure CT winding resistance, excitation, saturation, ALF, FS, and PT parameters, while automatically demagnetizing CT cores after testing. This reduces human error and enhances reliability for power grid inspections and fault diagnostics.
What Are the Key Technical Features of the KT220?
Key features include full-scale CT ratio up to 10000:1, knee-point voltage measurement from 1 V to 30 kV, current measurement from 1% to 400% rated value, and burden analysis (full, ½, ¼, ⅛). The device supports direct and indirect ALF/FS determination, transient behavior testing, secondary burden measurement, and “nameplate guessing” for unknown CTs, ensuring compatibility with older transformers.
| Feature | Specification |
|---|---|
| Display | 10.1-inch Full HD Touchscreen |
| Weight | 3.5 kg |
| CT Ratio Range | Up to 10000:1 |
| Knee-Point Voltage | 1 V – 30 kV |
| Current Range | 1% – 400% rated value |
| Accuracy | 0.05% |
Which Standards Does the KT220 Comply With?
The KT220 meets IEC 60044-1, IEC 60044-6, IEC 61869-2, ANSI 30/45, and IEEE C57.13 standards. Its automated assessment for accuracy class >0.1 ensures consistent compliance for both CTs and PTs, supporting global utility, industrial, and substation testing requirements. Wrindu’s integration of international standards makes it a reliable choice for engineers worldwide.
How Does PC Integration Enhance Testing Workflow?
With an RJ45 interface, the KT220 connects to a PC to allow full control, automated data export, and report customization. Test results can be transferred directly into Word documents, simplifying record-keeping and enabling integration into production lines or routine grid inspections. This connectivity enhances efficiency for engineering teams handling multiple test points.
What Is the Purpose of the Nameplate Guessing Function?
The KT220 can identify unknown CT parameters, including type, class, ratio, knee point, power factor, operating burden, and secondary winding resistance. This allows older or undocumented transformers to be safely put into service without manufacturer support. The function aids maintenance teams in classification, testing, and preventive maintenance planning.
How Does Automatic Demagnetization Support Grid Reliability?
The analyzer’s demagnetization feature reduces residual magnetism in CT cores after testing. By analyzing remanence before operation, the KT220 ensures protective relays function correctly and prevents misoperation due to remanent magnetism. This functionality improves safety and reliability for substation operations and troubleshooting.
| Measurement Type | Supported Functions |
|---|---|
| CT | Ratio, phase-angle, winding resistance, excitation, saturation, residual magnetism, ALF/FS, transient behavior |
| PT | Ratio, polarity, excitation curve, voltage measurement |
Wrindu Expert Views
“With the KT220, field engineers gain a compact yet highly accurate tool that balances mobility with technical performance. Its automatic demagnetization, nameplate guessing, and full PC integration reduce testing time and human error, while supporting multiple standards for global applications. Wrindu emphasizes usability and precision, making it an ideal solution for utilities, substations, and industrial sites seeking efficiency, safety, and reliability in transformer testing.”
Conclusion
The KT220 Handheld CT/PT Analyzer delivers accurate, efficient, and versatile testing for current and potential transformers. Wrindu’s focus on automatic demagnetization, nameplate guessing, and PC connectivity streamlines operations while ensuring compliance with global standards. For engineers and technicians, the KT220 offers a lightweight, durable, and highly precise solution to improve testing quality, grid safety, and workflow efficiency.
FAQs
Q1: Can the KT220 test both single and multi-ratio CTs?
Yes, it supports all types of single and multi-ratio CTs, including older units with unknown specifications.
Q2: How fast can the KT220 complete CT/PT testing?
Testing is fully automatic and optimized for rapid measurement, significantly reducing on-site testing time.
Q3: Does the KT220 support integration with PCs?
Yes, it offers RJ45 connectivity for full PC control, data export, and customizable reports.
Q4: Is the KT220 suitable for high-voltage industrial environments?
Absolutely. With high noise immunity and variable frequency safety methods, it can safely handle voltages up to 30 kV.
Q5: What maintenance is required for the KT220?
Regular calibration, battery checks, and software updates are recommended to maintain accuracy and reliability.