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HF-TC-634 Transformer Short Circuit Impedance Tester
Transformer Short Circuit Impedance Tester accurately measures short-circuit impedance and voltage of power transformers. It effectively judges winding deformation, displacement and loose structure after short-circuit impact, supporting field testing, routine maintenance and post-fault assessment for transformers in substations and power plants.
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Short-circuit impedance is a critical parameter of transformers. The short-circuit impedance method serves as a conventional means to judge winding deformation. In accordance with GB1094.5-2003 and IEC60076-5:2000, the variation of short-circuit impedance is the criterion for identifying transformer winding deformation. Significant impedance changes usually indicate winding displacement, distortion or loose internal structure caused by short-circuit impact. Our HTZ-2 Transformer Short Circuit Impedance Tester delivers accurate, stable field measurement, supporting automatic three-phase testing, data storage and on-site printing. It is widely adopted for factory acceptance, routine substation maintenance and post-fault diagnosis of power transformers.
Features
- HF-TC-634 Transformer Short Circuit Impedance Tester can measure transformer short-circuit impedance, short-circuit reactance and three-phase impedance voltage.
- It displays measured parameters including voltage, current, power and frequency for each test.
- Measurement can be completed merely with single-phase AC220V power supply.
- Test power supports internal power source and external power source; the internal power source is the working power of the instrument, and the external power can be input via voltage regulator.
- Simple and convenient wiring. It automatically completes three-phase measurement with one-time wiring and startup, and directly displays test results.
- Automatic frequency correction eliminates errors caused by frequency fluctuation.
- Built-in non-volatile memory can store thousands of groups of test results for long-term data preservation.
- Large LCD screen with full Chinese menu and operation prompts for intuitive operation.
- Thermal printing function with fast printing speed and low noise.
- Permanent calendar and clock function.
Technical Parameters
| Item | Specification |
|---|---|
| Measuring Range | Voltage: 20V ~ 450V Current: 0.5A ~ 10A |
| Accuracy | Voltage, Current, Impedance: 0.2 class Impedance: 0.5 class; Power: 0.5 class (cosφ>0.1) |
| Overall Dimension | 360mm×245mm×250mm |
| Instrument Weight | 6.5kg |
Operating Conditions
- Ambient Temperature: -10℃ ~ 50℃
- Ambient Humidity: ≤85%RH
- Working Power Supply: AC220V±10%
- Power Frequency: 50±1Hz
Packing List
| Description | Qty | Unit |
|---|---|---|
| HTZ-2 Transformer Short Circuit Impedance Tester | 1 | Set |
| Test Connection Cables | 1 | Set |
| AC Power Cord | 1 | Pc |
| Thermal Printing Paper | 2 | Rolls |
| Operation Manual | 1 | Copy |
| Calibration Certificate | 1 | Copy |
FAQ for Transformer Short Circuit Impedance Tester
Q1: What standard does this tester comply with?
A: It complies with GB1094.5-2003 and IEC 60076-5:2000. The impedance variation result can be used to judge transformer winding deformation.
Q2: What power supply is required for testing?
A: Only single-phase AC220V power supply is needed. It supports built-in internal power source or external power input via voltage regulator.
Q3: Can the instrument automatically finish three-phase measurement?
A: Yes. Complete wiring once, start the device, and it will automatically carry out three-phase measurement and display results directly.
Q4: Can frequency fluctuation affect measuring accuracy?
A: No. It adopts automatic frequency correction function to eliminate measurement errors caused by frequency drift.
Q5: Does the tester support data storage and printing?
A: It can store thousands of test records with built-in non-volatile memory. Equipped with thermal printer for on-site report output.
Q6: What is the measuring range of the equipment?
A: Voltage: 20V ~ 450V; Current: 0.5A ~ 10A. Voltage & current accuracy class: 0.2.
Q7: Is it suitable for field substation maintenance?
A: Yes. Compact size, easy wiring, lightweight design, ideal for factory FAT test, substation routine maintenance and post-fault transformer inspection.
Q8: Will stored data be lost after power off?
A: No. It is equipped with non-loss memory and independent calendar & clock function, data can be saved long-term.
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