Digital Transformer Low Voltage Short Circuit Impedance Tester

The XZH TEST XHZK1620 is a professional-grade Digital Low Voltage Short Circuit Impedance Tester purpose-built for transformer winding deformation diagnosis. Short-circuit impedance is a critical parameter for assessing transformer winding integrity — per IEC 60076-5:2000 and GB1094.5-2003, the variation in short-circuit reactance is the definitive criterion for determining whether transformer windings have sustained mechanical deformation during service, transportation, or fault events.

Designed for on-site and laboratory use, the XHZK1620 operates from a standard single-phase 220V AC supply, automatically sequences through three-phase measurements after a single wiring setup, and provides immediate results — no external auxiliary equipment required.

• Comprehensive Measurement Suite — Measures transformer short-circuit impedance, short-circuit reactance, and three-phase impedance voltage in a single automated test sequence.
• Real-Time Parameter Display — Simultaneously displays voltage, current, power, frequency, and other test parameters for complete measurement transparency.
• Standard 220V AC Operation — Operates entirely from single-phase 220V AC mains; can also be powered by a small 500VA UPS when AC power is unavailable at remote sites.
• Dual Power Source Flexibility — Supports both internal power (instrument self-powered) and external power (regulator-fed input) modes, adapting to diverse field conditions.
• Single-Setup, Three-Phase Auto-Measurement — Wire once, start once — the instrument automatically completes all three-phase measurements and displays results, eliminating repetitive manual operations and reducing measurement errors.
• Auto-Controlled Output — When using internal power, output voltage and current are automatically regulated by the instrument — no external auxiliary equipment needed.
• Automatic Frequency Correction — Built-in frequency compensation eliminates measurement errors caused by grid frequency fluctuations, ensuring consistent accuracy in unstable power environments.
• Mass Data Storage — Non-volatile onboard memory stores thousands of measurement results with long-term retention; USB port for data export to flash drives for reporting and archiving.
• Intuitive User Interface — Large-screen LCD with touch operation, supporting both Chinese and English menus with clear operation prompts for minimal training requirements.
• Built-in Thermal Printer — Print test data directly on-site for immediate documentation and client reporting.
• Real-Time Clock — Integrated calendar/clock with battery backup for proper timestamping of all measurements.

• 1) Power Input Terminals (I1, I2): External power input, e.g., from a voltage regulator.
• 2) Sample Test Terminals: I — current test lead connection; U — voltage test lead connection.
• 3) RS-232 Port: Communication interface for function expansion.
• 4) USB Port: Plug in a USB flash drive to export stored measurement data.
• 5) Built-in Printer: On-site thermal printing of test data and reports.
• 6) AC 220V Inlet: Power socket, main switch, and fuse location.
• 7) LCD + Touch Panel: Data display, touch-based operation, and parameter input.
• 8) Grounding Post: Safety earth connection.