Portable Transformer Turns Ratio Tester, Automatic TTR Meter for Single / Three Phase / Z-Type Transformer

Portable Transformer Turns Ratio Tester, Automatic TTR Meter for Single / Three Phase / Z-Type Transformer

Product Description

The transformer turns ratio test, or TTR test, confirms that the transformer has the correct ratio of primary turns to secondary turns. Using this test correctly can help to identify tap changer performance, shorted turns, open windings, incorrect winding connections and other faults inside transformers. MY’s range of TTR testers are robust to withstand the harsh conditions that some transformer testing in. The range includes varying features to simplify and speed up testing as well as 3 phase TTR testers and PT and CT TTR testers.

Transformer Turns Ratio Analyzer / Portable TTR Tester / Digital Transformer Ratio Meter
Features

Using a three-phase precision inverter power supply as the measurement voltage, which eliminates the harmonic influence of the mains voltage during measurement and makes the measurement more accurate. no influence when working with power generator.
The three-phase output voltage is adopted to improve the test speed. The phase angle can be measured, and automatically identify the transformer wiring group 0-11. For the low-voltage rectifier transformer measuring multiple windings, the low-voltage side can measure the transformation ratio and the angle deviation of 7.5 ° without removing the wiring.
It is suitable for a wide variety of transformers, especially suitable for the measurement of Z-type transformers, rectifier transformers, grounding transformers, electric furnace transformers, phase-shifting transformers, balance transformers, etc.
With high and low voltage reverse connection protection, transformer turn-to-turn short-circuit protection, tap switch failure protection, and output full short-circuit protection, it increases the stability of instrument.
After input parameters, it can automatically measure the transformer ratio, error value and tap position of the tap changer. Especially for tap changers with asymmetric tapping, it can accurately measure the position of tap changer. A tap switches capable of measuring 99 tap positions.
Adopt 7-inch high-definition LCD colorful touch screen, modular display, good visibility even under strong light.
The instrument not only has print output, U disk interface, but also can be equipped with RS232 interface, which is convenient for paperless office.
With sealed water-proof and shock-proof sturdy hand case, it's cold-resistance, high temperature resistance, which is suitable for field test.
With Bluetooth function, instrument can be controlled by Android cellphone or ipad.
Product Parameters

Application Scenarios

FAQ

Question 1: Inaccurate test ratio value / Large measurement deviation
Customer: When testing transformer turns ratio on site, the measured ratio value has large deviation and cannot match the transformer nameplate data. What are the possible reasons and solutions?
Manufacturer: First confirm the transformer has been fully power-off and completely discharged to eliminate residual magnetism influence. Check whether the test cables are correctly connected to high voltage and low voltage terminals, and ensure the clips have tight metal contact without rust or oxidation. Verify the rated voltage and tap position parameters input into the instrument are consistent with the transformer nameplate. Keep the test wires away from high-voltage power cables to avoid electromagnetic interference. Restart the tester and redo the test. If the deviation still exists, stop testing and contact technical support. Do not disassemble the instrument by yourself.

Question 2: Instrument cannot boot up / No screen display after power on
Customer: I connect the power adapter and turn on the power switch, but the tester screen remains black with no display. How to troubleshoot this issue?
Manufacturer: Check whether the AC220V power socket has normal power supply and confirm the power adapter is tightly inserted into the instrument power port. If using built-in lithium battery mode, check if the battery is exhausted and recharge the battery for more than 2 hours before restarting. Inspect the power switch for damage or poor contact. Disconnect all external test cables, then reboot the device. If the screen still cannot light up, stop operation and contact technical support. Never open the instrument case for self-maintenance.

Question 3: Tester prompts wiring error alarm during measurement
Customer: After connecting all test leads and starting the test, the instrument keeps popping up wiring error warning and refuses to run the test. What should I check?
Manufacturer: Power off the instrument and recheck all A, B, C, 0 terminal wiring. Confirm high voltage and low voltage sides are not reversed. Check whether test cable clips have poor contact or broken internal wires. Ensure there is no parallel branch or earthing point on the transformer test side which will affect signal collection. Remove all external shunt connections, reconnect the cables firmly, restart the instrument and start the test again. If the alarm still appears, stop testing and contact technical support. Do not modify the internal circuit of the tester.

Question 4: Failed to export test data via USB or RS232 port
Customer: After finishing transformer ratio testing, I cannot export the saved test data to computer through USB or RS232 interface. What causes this problem?
Manufacturer: Confirm the USB flash drive is formatted to FAT32 and has no virus or file encryption. Check the USB or RS232 cable for damage and ensure it is fully plugged into the instrument port. Restart the tester and re-save the test record before exporting. Try another qualified USB flash drive or data cable for a second attempt. If data export still fails, contact technical support for remote guidance. Do not format the instrument internal storage.

Question 5: Cannot automatically identify transformer vector group
Customer: The instrument can measure turns ratio normally, but it fails to automatically identify the transformer vector group. What should I do to solve it?
Manufacturer: Confirm the transformer has been fully discharged and there is no residual voltage. Double check all wiring terminals, ensure three-phase test cables are connected correctly without phase sequence error. Check if the transformer has on-load tap-changer at non-rated tap position, adjust tap to rated tap and test again. Avoid strong electromagnetic field interference near the test site. Restart the tester and restart the measurement. If the vector group identification still fails, contact technical support. Do not adjust internal instrument parameters without authorization.

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.

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