Name: China Customized Transformer Winding Deformation Tester Manufacturers Factory - High Quality - Moen
Brand: Moen
SKU: 292417320

Transformer Winding Deformation Tester

Product Introduction

The Transformer Winding Deformation Tester measures the variations in response of internal winding parameters across various frequency domains. It assesses the degree of deformation in the transformer windings by examining how significant these variations are, how much the response changes in amplitude and frequency, and how the frequency response behaves over time. It evaluates, based on these measurements, whether the transformer has endured serious damage and necessitates significant repairs.

The Transformer Winding Deformation Tester consists of a measurement system with high precision, which is based on a microcontroller and laptop. Its compact design and simple operation offer extensive testing and analysis capabilities. Users are able to use the device on their own after either consulting the manual or receiving some short training.

Product Parameter (specification)

1. Scanning Modes
1. Linear Sweep Distribution	Sweep measurement range;(10Hz) to (10MHz), 40,000 sweep points; resolution options;0.25kHz, 0.5kHz, and 1kHz.
2. Segmented Sweep Measurement Distribution	Sweep measurement range;(0.5kHz) to (1MHz), 2,000 sweep points; (0.5kHz) to (10kHz) (10kHz) to (100kHz) (100kHz) to (500kHz) (500kHz) to (1000kHz)
2. Other Technical Parameters	1. Amplitude Measurement Range;(-120dB) to (+20dB) 2. Amplitude Measurement Accuracy;≤1dB 3. Scan frequency accuracy;≤0.01% 4. Signal input impedance;1MΩ 5. Signal output impedance;50Ω 6. Signal output amplitude;±20V 7. Common-mode test repeatability;99.9%

Product feature and application

1. Data acquisition and control utilize a high-speed, highly integrated microprocessor.

2. The instrument connects to a laptop via USB interface for operation.

3. The instrument automatically analyzes test results and generates electronic documents (Word format) for storage and printing.

4. This instrument meets the technical requirements of power standard DL/T911-2016 "Frequency Response Analysis Method for Power Transformer Winding Deformation."

5. High-speed dual-channel 16-bit A/D sampling (on-site tap changer adjustments produce distinct waveform curve changes).

6. The frequency response method hardware core employs DDS dedicated digital high-speed frequency sweeping technology (USA), enabling accurate diagnosis of winding faults such as distortion, bulging, displacement, tilting, inter-turn short-circuit deformation, and phase-to-phase contact short circuits.

7. The frequency response method incorporates dual measurement systems: linear sweep measurement and segmented sweep measurement, compatible with both current domestic measurement methodologies.

8. The amplitude-frequency characteristics of the frequency response method comply with national technical specifications for amplitude-frequency characteristic testers. The horizontal axis (frequency) offers both linear and logarithmic scales, enabling printed curves to be either linear or logarithmic. Users may select the appropriate scale based on practical requirements.

Prodection details

Power System Operations and Maintenance:

Daily operational monitoring of 63kV to 500kV power transformers to detect potential faults such as inter-turn/phase short circuits and coil displacement, providing a basis for maintenance and repairs.

Transformer Fault Diagnosis:

After transformer testing, transportation impacts, or operational short-circuit incidents, inspect windings for deformation including distortion, bulging, or tilting to assess fault severity.

Substation Maintenance:

Conduct winding condition inspections on main transformers and other equipment during pre-commissioning of new substations and periodic maintenance of existing substations to ensure safe operation.

Transformer Maintenance Assessment:

Compare historical data with current test results to determine winding deformation trends, identify overhaul requirements, and optimize equipment maintenance schedules.

Renewable Energy Transformer Inspection:

For renewable energy transformers with balanced windings, conduct specialized winding deformation testing after isolating the balanced windings and disconnecting the zinc oxide surge arresters.

Company Qualifications

Wuhan Moen Intelligent Electric Co., Ltd. is located within the Wuhan East Lake High-Tech Development Zone, China's "National Independent Innovation Demonstration Zone" in the Optics Valley. The company's campus spans 28 acres with a building area of 8,000 square meters. As a specialized company engaged in the design and manufacturing of electrical equipment, it primarily provides advanced high-voltage testing equipment and detection instruments to power generation, power supply, and power consumption departments within the power system, as well as research institutions and manufacturers related to power equipment. The company originated from the High-Voltage Testing Equipment Manufacturing Plant of Wuhan High-Voltage Research Institute, established in 1992, making it one of the earliest manufacturers in China specializing in high-voltage testing.

FAQ

1)What winding connection types does the MERB-II Transformer Winding Deformation Tester support for measurement?

**Answer**: The instrument supports measurements for multiple winding connection types, including three-phase Yn, three-phase Y, three-phase Δ, and single-phase X/Y/Z configurations (e.g., AX, BY, CZ). It is compatible with connection schemes for power transformers (D, Yn, Y, III types) and traction transformers (VV1, VV3, Scott types), accommodating testing requirements for transformers of various specifications.

2)What are the sweep frequency measurement range and accuracy specifications for this instrument?

**Answer**: Sweep frequency measurement is divided into two modes with the following ranges:
1. Linear Sweep: 10Hz–10MHz, featuring 40,000 sweep points with selectable resolution of 0.25kHz, 0.5kHz, or 1kHz;
2. Segmented Scan: 0.5kHz–1MHz, with 2000 sweep points subdivided into 4 bands (0.5kHz–10kHz, 10kHz–100kHz, 100kHz–500kHz, 500kHz–1000kHz).
Accuracy specifications: Scan frequency accuracy ≤0.01%, amplitude measurement accuracy ≤1dB, in-phase test repeatability 99.9%, meeting power standard DL/T911-2016 requirements.

3) What key preparatory steps must be completed before conducting transformer winding deformation testing?

**Answer**: Core preparations include:
1. Equipment Pre-processing: Remove all leads from transformer terminals and keep them away from bushings. Short-circuit and ground all bushings to fully discharge. For renewable energy transformers with balanced windings, seal the balanced windings (XP and CP connections) and disconnect the zinc oxide surge arresters.

2. Instrument Preparation: Before powering on, ensure the selector switch is set to the "External Power Supply" position without connecting test leads. Preheat the instrument for 15 minutes (extend in low-temperature environments). Connect to a laptop via USB (requires installation of the accompanying software and CH375WDM driver).

3. Environment and Power: Use AC220V power supply. In environments with severe interference, employ a sine wave UPS power conditioner. Eliminate radio wave interference by grounding and shielding the opposite side of the test bushing.

4. Instrument Self-Test: Short-circuit the yellow (excitation terminal) and green (response terminal) clamps. Ensure the grounding wire is securely grounded. After launching the software, a straight line at 0dB indicates normal instrument operation.

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