Manufacture Transformer Winding Deformation Diagnostic Tester SFRA Sweep Frequency Response Analyzer

• High-speed integrated microprocessor acquisition control system
• USB interface for computer-to-instrument connectivity
• Optional wireless Bluetooth interface for laptop communication
• DDS digital high-frequency sweep technology for precise diagnostics
• Dual-channel 16-bit A/D sampling with real-time waveform monitoring
• Software-controlled signal output with ±10V peak amplitude
• Automatic electronic document generation (Word format)
• Dual-frequency and linear sweep frequency measurement systems
• Comprehensive amplitude-frequency characteristic analysis
• Automatic inspection data analysis system

Product Parameters

Application Scenarios

FAQ

Question 1: Cannot get stable test curve, curve graph shows obvious jitter and noise interference
Customer: We adopt this rack‑mount SFRA sweep frequency response analyzer for transformer winding test on substation site. The obtained frequency‑response curve has severe jitter and large noise interference, and we cannot get stable test data. What are the possible reasons?
Manufacturer: This problem frequently occurs in high‑voltage substation field test environments with strong electromagnetic interference. Please troubleshoot step by step: first, check whether Excitation, Reference and Response high‑frequency test cables are firmly screwed onto the rear‑panel BNC ports, confirm no loose connection; second, keep all test cables far away from live high‑voltage equipment and power cables, avoid crossing and parallel laying; third, inspect the alligator clamps, make sure they have tight, rust‑free contact on transformer bushing terminals. If the trouble still exists after these checks, please get in touch with our technical support, do not disassemble the aluminum alloy chassis by yourself.
Question 2: Bluetooth connection fails, cannot realize wireless data transmission between device and PC software
Customer: We want to use Bluetooth for wireless communication between SFRA analyzer and computer. But the computer cannot search the device Bluetooth signal, wireless connection cannot be established. How should we handle this fault?
Manufacturer: This issue often happens in complex field test sites or PC driver‑abnormal conditions. Please carry out step‑by‑step inspection: first, confirm the instrument main unit is powered on normally, check Bluetooth indicator status; second, verify PC Bluetooth function is turned on, close other surrounding interfering Bluetooth devices; third, you can switch to USB wired communication as an alternative temporary solution to finish the test task. If Bluetooth still cannot work normally, please contact our after‑sales team, do not open the device rear panel for private maintenance.
Question 3: Test curves cannot be saved and exported, cannot generate complete transformer test report
Customer: After we finish a set of transformer winding SFRA measurement, the test curves cannot be stored, and we fail to export formal test reports in matching PC software. What causes this malfunction?
Manufacturer: This failure usually relates to communication connection status and software operating authority. Please follow these steps for troubleshooting: first, double‑check USB or Bluetooth communication link between analyzer and computer, confirm there is no interruption during testing; second, confirm the PC software has obtained correct read‑write access permission on your computer; third, verify you have completed full‑range scanning test instead of terminating the test halfway. If the above operations cannot fix this problem, please send us your fault screenshot, do not modify the software configuration files arbitrarily.
Question 4: Abnormal test results, phase‑comparison curves show large deviation while transformer has no known damage record
Customer: When testing a running transformer without known winding fault, we get greatly deviated frequency‑response curves among three phases by this SFRA analyzer, we doubt whether the test result is valid. Where may the problem come from?
Manufacturer: This phenomenon is common caused by non‑standard field test operations rather than actual transformer winding damage. Please check item by item: first, make certain the transformer is fully de‑energized and reliably grounded before test; second, remove all external connecting wires on transformer bushings completely; third, re‑check the connection sequence of Excitation, Reference, Response test cables, ensure connection mode complies with operation manual. Retest after finishing above checks. If abnormal deviation remains, please contact technical support, do not judge transformer fault only by one‑time abnormal curve.
Question 5: Device rear‑panel signal ports no response, no signal output when starting sweep frequency test
Customer: When we start the sweep frequency test, the instrument runs but Excitation, Reference and Response ports have no signal output, the whole measurement cannot proceed. How to troubleshoot this issue?
Manufacturer: This fault may be caused by improper power supply or damage of rear‑panel BNC ports. Please inspect step‑by‑step: first, check AC power input socket, confirm power supply voltage is stable and power cord connection is reliable; second, visually inspect three BNC signal ports on rear panel, check for physical crack, deformation or foreign‑object blockage; third, restart the whole instrument and reload test software. If the ports still have no signal output, please stop using the equipment immediately, contact our after‑sales department, do not dismantle internal circuit components
Question 6: Shipping Method
Customer: If we place an order, how do you typically ship the goods? Will there be any issues with transporting bulky items such as reactors?
Manufacturer: We default to using dedicated logistics lines or brand-specific express shipping services; small-sized main units and accessories may also be shipped via standard courier services. Large items, such as reactors and excitation transformers, are packed using wooden crates or wooden frames for reinforcement to prevent bumps and moisture exposure during transit; a packing list is included with each package to facilitate item-by-item counting for you. Logistics costs are typically determined by both parties in accordance with the contract terms; after shipment, we will send you both the tracking number and the carrier's contact phone number for easy tracking.If your project site is remote or if delivery to the site is required with a specified logistics company, please inform us in advance when placing your order; we can then coordinate and arrange accordingly.
Question 7: Delivery Lead Time
Customer: Our project is under tight deadlines; how long will it take for the order to be shipped after we place it? Can we request expedited shipping?
Manufacturer: Standard specifications – stock available; typically delivered upon receipt of the order. Orders can be shipped within [X] working days; for non-standard products requiring customized voltage levels, capacities, or reactor combination configurations, the production cycle typically ranges from [X] to [Y] days.The delivery time will be approximately 7-15 working days; the specific timeline shall be subject to the sales confirmation provided upon order placement. If your project has a tight schedule, please inform us of the latest expected delivery date before placing your order; we will first verify the production schedule and inventory status, and where possible, will coordinate expedited production and prioritize shipment. However, it is recommended to allocate sufficient transit time for logistics to avoid delaying on-site testing.
Question 8: After-sales Service and Warranty
Customer: What is the warranty period for this equipment? If any issues arise during on-site use, how will your after-sales service respond?
Manufacturer: We provide a two-year free warranty on the entire unit and lifelong technical support services. During the warranty period, if issues arise due to defects in the equipment itself, we will provide free repair or replacement of components; when problems occur on-site, we commit to responding within 24 hours; most wiring and parameter configuration issues can be resolved through remote guidance via video or telephone; for cases where an on-site visit is necessary, we will arrange for our technicians to arrive at the location to resolve the issue. After the warranty period expires, we still offer repair services, with spare parts supplied at cost price for the long term, and software updates provided free of charge for life. Upon delivery of the equipment, we also offer free operational training (video operation guides)to ensure that your testing personnel can operate the equipment independently and proficiently; should you have any further questions, please feel free to contact our dedicated after-sales hotline directly.
Question 9: Shipping methods for each region (Sea freight)
Customer: Our projects are distributed across several states, and our procurement volumes are substantial; are the shipping methods consistent across all states? How is the delivery time calculated?
Manufacturer: The specifications are identical; however, it should be specifically noted that this equipment set is large in size and heavy in weight—components such as the reactor and excitation transformer are all classified as heavy components. Therefore, regardless of which state or region the shipment is destined for, we will uniformly utilize sea freight transportation. The packaging employs export-grade wooden crates with reinforced structures, along with moisture-proof and rust-proof treatments; the design of these wooden crates is optimized for long-distance sea transport and multiple lifting and transshipment operations. Upon arrival at the destination, simply unpack the goods and conduct an inspection before putting them into use. Regarding delivery time, the sea freight transit period depends on the port of destination: near-sea routes are generally faster, whereas ocean routes may take longer; the exact number of days will be confirmed based on the shipping schedule specified in the bill of lading. We have a dedicated freight forwarding agency to handle booking of shipping space, customs declaration, insurance, and other related procedures; once the vessel departs, we will send you documents such as the bill of lading and the packing list, enabling you to arrange for the receipt of goods at the port of destination and their inland transshipment in advance

Shipping scenario

Scene (One)

Scene (Two)

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