Transformer On-load Tap Changer Tester OLTC Parameter Tester ±0.1% High Accuracy with U-Disk Storage 2-Year Warranty

Application Scenarios

FAQ

Question 1: Unable to get stable waveform of on-load tap changer
Customer: After connecting all test cables and starting the test, the waveform displayed on the screen is unstable and fluctuates continuously. What are the possible reasons?
Manufacturer: This problem often occurs in field tests. Please follow these troubleshooting steps: First, check whether all A/B/C phase test wires are firmly connected and ensure good contact at the tap terminals. Second, confirm there is no serious oxidation on the switch contacts. Third, keep the signal wires away from high-voltage cables to reduce electromagnetic interference. If the waveform is still abnormal after the above checks, please contact us promptly and do not disassemble the tester by yourself.
Question 2: The measured transition resistance exceeds the normal range
Customer: The tester can capture the switching waveform, but the tested transition resistance value is higher than the standard limit. How should we handle this situation?
Manufacturer: This phenomenon may be caused by poor contact of the OLTC contacts or aging internal components of the tap changer. You can take the following measures: First, re-clean the contact surface of the on-load tap changer. Second, check if the test current setting (0.5A or 1.0A) matches the type of your transformer switch. Third, repeat the test for multiple times to verify repeatability. If the measured value remains abnormal, it is recommended to carry out a comprehensive maintenance inspection for the on-load tap changer.
Question 3: Printer fails to print test reports
Customer: The test finishes normally and all data is saved, but the built-in thermal printer cannot output the paper report. What should we do?
Manufacturer: This is usually a simple fault. Please check the following points: First, confirm whether the thermal paper is installed correctly and the paper roll is not exhausted. Second, check if the print head is stuck or dirty. Third, restart the tester and try printing again. If the printer still cannot work, please contact our technical support team.
Question 4: The tester automatically shuts down during field test
Customer: When performing OLTC test in the substation, the main unit shuts down unexpectedly in the middle of measurement. Is the instrument damaged?
Manufacturer: In most cases, this is triggered by the overheat protection or power supply fluctuation, not permanent damage. Please follow the steps: Disconnect the power supply, let the instrument rest for about 30 minutes to fully cool down. Check the input power cable for loose connection. After that, restart the tester and re-run the test. If auto-shutdown still happens, please send us the on-site phenomenon description for technical support.
Question 5: Precautions for transportation, handling and wiring
Customer: This tester is packed in a rugged waterproof case. Are there any key precautions for transportation and on-site wiring?
Manufacturer: Yes, here are the main precautions: First, avoid violent impact and drop during transportation to protect the internal circuit and LCD screen. Second, all wiring work must be carried out after the transformer is fully powered off and grounded. Double-check the A/B/C phase wiring before starting the test. Third, store the tester in dry and ventilated environment, and keep it away from rain and moisture. For first-time use, read the operation manual carefully and arrange experienced high-voltage test personnel to operate.
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)

Attachment Directory

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