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HF-IT-204 Voltage Transformer Tester
This portable Voltage Transformer Tester accurately measures ratio deviation, phase angle error, winding resistance and polarity. It complies with IEC standards, designed for on-site calibration and inspection of all types of substation voltage transformers.
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The Portable Voltage Transformer Tester is an integrated field testing device dedicated to comprehensive calibration of voltage transformers. It precisely detects ratio error, phase angle deviation, winding resistance, polarity and excitation characteristics, fully conforming to IEC international standards. Compact, shock-resistant and easy to operate, it serves routine inspection, acceptance testing and periodic verification for metering and protection VTs in power substations and power plants worldwide.
Product Features
- Complies with national standards to test the ratio error and phase error of measuring voltage transformers at specified load points ranging from 20% to 120% rated voltage.
- Completes measurement in one go and displays the specified-point errors (ratio error & phase error) of voltage transformers under maximum and minimum secondary load conditions in accordance with standard requirements.
- Measures and displays the standard-point ratio and phase errors simultaneously under two arbitrary actual secondary load settings for voltage transformers.
- Tests the transformation ratio and polarity of voltage transformers.
- Measures the actual on-site secondary burden of VT devices.
- Built-in wiring diagram display helps technicians verify test connections conveniently.
- Intelligent wiring error alert system safeguards instrument safety and ensures high measurement accuracy.
- Adopts low-voltage testing principle to fully guarantee operator personal safety during tests.
- Equipped with a 320*240 large LCD screen with full Chinese interface; easy wiring & operation, highly portable design.
- Supports storage and printout of all measured data for later inquiry and archiving.
- Optional portable rechargeable field test power supply is available for flexible power access during outdoor on-site testing.
Technical Parameters
| Items | Technical Data |
|---|---|
| Transformation Ratio Range | Full-range measurement (electromagnetic type): ±0.2% |
| Error Measuring Range | Primary voltage: 3–110kV/√3 (Non-standard primary voltages are also supported) |
| Secondary Voltage | 100V, 100V/√3, 6kV/100V, 10kV/100V, 20kV/100V, 35kV/100V, 6kV/√3/100V/√3, 10kV/√3/100V/√3, 20kV/√3/100V/√3, 35kV/√3/100V/√3, 66kV/√3/100V/√3, 110kV/√3/100V/√3 |
| Power Factor | 0.0 ~ 1.0 |
| Limit Error | ±0.05% |
| DC Resistance | 0.0~0.1Ω: ±3% 0.1~50Ω: ±1% |
| PT Secondary Burden | 1VA ~ 500VA, tolerance: ±2% |
| Calibration | Voltage Range: 0–100V (Percentage error: 0.5%) Ratio Error: 0.001% ~ 3% (at 100V) Phase Error: 0.00′ ~ 50′ (at 100V) Ratio Error Formula: ΔX=±(2%×X+2%×Y±2 digits) Phase Error Formula: ΔY=±(2%×X+2%×Y±2 digits) Conductance: 0.1mS ~ 99.9mS Conductance Error: ΔX=±(2%×X+2%×Y±2 digits) ΔY=±(2%×X+2%×Y±2 digits) |
| Working Power Supply | AC 220V ±10%, 50Hz ±2% |
| Ambient Temperature | 0 ~ 40℃ |
| Overall Power Consumption | 30W (Standby); 150W (Operating) |
| Ambient Humidity | ≤85% RH at 25℃ |
| Net Weight | ≤6kg |
| Overall Dimensions | 37cm × 28cm × 16cm |
Portable Voltage Transformer Tester Packing List
| No. | Item Description | Quantity | Unit |
|---|---|---|---|
| – | Product Name: Portable Voltage Transformer Tester | Total Packing Qty: 1 Set | – |
| 1 | Host Machine (Portable VT Tester) | 1 | PC |
| 2 | High Voltage Test Cables Set | 1 | Set |
| 3 | Secondary Measuring Wires & Clips | 1 | Set |
| 4 | Power Supply Cable | 1 | PC |
| 5 | Grounding Wire | 1 | PC |
| 6 | English Version User Operation Manual | 1 | Copy |
| 7 | Factory Test Report & Calibration Certificate | 1 | Set |
| 8 | Portable Waterproof Carrying Case | 1 | PC |
| 9 | Accessories Package (Fuses, Spare Parts) | 1 | Set |
FAQ for Portable Voltage Transformer Tester
Q1: What is a Portable Voltage Transformer Tester used for?
A: This portable tester is professionally designed for on-site testing and calibration of voltage transformers (VT) in power systems. It can accurately measure VT ratio error, phase error, polarity, and insulation performance, widely applied in power station inspection, substation maintenance, and electric power engineering acceptance.
Q2: Is this tester suitable for field outdoor operation?
A: Yes. The device features a lightweight portable design, waterproof carrying case, anti-interference hardware circuit, and wide working temperature range. It adapts to complex outdoor and on-site power construction environments.
Q3: What types of voltage transformers can it test?
A: It supports various common VTs, including indoor/outdoor electromagnetic voltage transformers, and covers conventional voltage levels used in power distribution and transmission systems.
Q4: Does the tester support fully automatic testing?
A: Yes. It integrates automatic testing, data calculation, error analysis and result saving. Users only need to complete wiring, and the device will finish the whole test process automatically, greatly improving on-site efficiency.
Q5: Is the test data accurate and credible?
A: All products are factory calibrated and delivered with official calibration certificate and factory test report. The instrument adopts high-precision sampling chip and anti-interference algorithm, ensuring stable and repeatable test results that meet national and industry power testing standards.
Q6: Can it test VT polarity and secondary loop parameters?
A: Yes. The equipment supports polarity judgment, secondary circuit continuity test and secondary loop parameter detection, meeting comprehensive field debugging and inspection requirements.
Q7: Is the operation complicated for new users?
A: No. The tester is equipped with a humanized operation interface and comes with a detailed English version user manual. The test steps are simplified, and field operators can master the operation quickly with basic professional knowledge.
Q8: What should I pay attention to during on-site wiring?
A: Please confirm the power supply is safely grounded via the equipped grounding wire before testing. Strictly follow the manual to connect high-voltage test cables and secondary measuring clips. Do not connect wrong ports to avoid equipment damage or test deviation.
Q9: Does the device support real-time data display and historical record query?
A: Yes. It supports real-time display of test data and curves, and can store a large number of test records. Users can query, export and print historical data on site.
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