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MY‑134 Portable On‑Load Tap Changer Tester OLTC Analyzer for Transformer Tap Switch Transition Resistance & Action Time Test
| Place of Origin | China Mainland |
|---|---|
| Brand Name | MINGYANG |
| Model Number | MY-134 |
| Minimum Order Quantity | 1 |
| Price | 1500USD |
| Packaging Details | carton |
| Delivery Time | 1 week |
| Payment Terms | L/C,D/A,T/T,D/P |
| Supply Ability | 100/Month |
Product Details
| Charging Current Gear | 3A/1A Gear; 0.6A/0.2A Gear | Max Terminal Voltage | 24V |
|---|---|---|---|
| Max Transition Resistance Range | 100Ω | Transition Resistance Range‑1A Gear | 0.4Ω～20Ω |
| Transition Resistance Range‑0.2A Gear | 10Ω～100Ω | Waveform Recording Duration | 300ms |
| Sample Rate | 30k | Time Resolution | 0.1ms |
| Resistance Resolution | 0.1Ω | Transition Resistance Accuracy | ±5% Reading ±0.1Ω |
| Transition Time Accuracy | ±0.5% Reading ±0.2ms | Operating Temperature | -10～40℃ |
| Relative Humidity | ＜85%RH | ||
| Highlight | Portable OLTC tester for transformers,On-load tap changer resistance tester,Transformer tap switch action time analyzer |
||
Product Description
MY‑134 Portable On‑Load Tap Changer Tester OLTC Analyzer for Transformer Tap Switch Transition Resistance & Action Time Test
Product Description
This tester is an innovative product that overcomes the limitations of traditional ratio bridge testing methods. It features a high-resolution LCD display and is powered by lithium batteries for convenient field use. The instrument is primarily designed for transformer turns ratio and vector group testing, as well as ratio/polarity testing of potential transformers (PT) and current transformers (CT), delivering fast measurement speed and high accuracy.
Product Alias
Transformer OLTC Tester / On‑Load Tap Changer Analyzer / Transformer Tap‑Changer Characteristic Tester / OLTC Characteristic Test Instrument / Transformer On‑Load Tap Switch Tester / Tap Changer Transition Resistance Tester / On‑Load Tap‑Changer Field Test Equipment
Product Description
This tester is an innovative product that overcomes the limitations of traditional ratio bridge testing methods. It features a high-resolution LCD display and is powered by lithium batteries for convenient field use. The instrument is primarily designed for transformer turns ratio and vector group testing, as well as ratio/polarity testing of potential transformers (PT) and current transformers (CT), delivering fast measurement speed and high accuracy.
Product Alias
Transformer OLTC Tester / On‑Load Tap Changer Analyzer / Transformer Tap‑Changer Characteristic Tester / OLTC Characteristic Test Instrument / Transformer On‑Load Tap Switch Tester / Tap Changer Transition Resistance Tester / On‑Load Tap‑Changer Field Test Equipment
Key Features
1. Test Y0Y△ type transformer, displaying resistance value directly without conversion
2. With humanized data analyzing, it can find the fault in waveform automatically and make remarks.
3. Waveform is displayed based on sampling data and adjust the resistance value and time range automatically.
4. △ type transformer can display three phases synchronism.
5. Can test with winding or without winding.
6. With four-ends wring way, measure the resistance precisely, no need lead-wire compensation.
7. Can test continuously, saving the time of transformer outage.
8. Can generate Word report, convenient to save and search the data.
9. It is controlled by microcomputer, matching 800×480 color LCD touch screen, fast printer, and supporting mouse. Easy to operate.
10. Can save 1000 groups data inside and connect with USB to save as well.
Application Scenarios
1. Test Y0Y△ type transformer, displaying resistance value directly without conversion
2. With humanized data analyzing, it can find the fault in waveform automatically and make remarks.
3. Waveform is displayed based on sampling data and adjust the resistance value and time range automatically.
4. △ type transformer can display three phases synchronism.
5. Can test with winding or without winding.
6. With four-ends wring way, measure the resistance precisely, no need lead-wire compensation.
7. Can test continuously, saving the time of transformer outage.
8. Can generate Word report, convenient to save and search the data.
9. It is controlled by microcomputer, matching 800×480 color LCD touch screen, fast printer, and supporting mouse. Easy to operate.
10. Can save 1000 groups data inside and connect with USB to save as well.
Technical Specifications
FAQ
Question 1: No valid waveform displayed after wiring and power‑on
Customer: We have finished wiring and powered on MY‑134 OLTC tester. The touch screen works normally, but no valid switching waveform appears on the interface. What may cause this problem?
Manufacturer: This situation frequently occurs during on‑site transformer maintenance, please perform step‑by‑step troubleshooting. First, check whether each test clip is firmly connected to the tap‑changer terminal, confirm no loose connection or poor contact. Second, verify the test parameter settings, confirm the test channel is selected correctly. Besides, check whether the on‑load tap‑changer is in normal switching state. If above steps cannot solve the fault, please contact us promptly and do not disassemble the equipment yourself.
Question 2: Distorted or incomplete test waveform
Customer: The tester can collect partial waveform, but the waveform is distorted and incomplete; transition resistance test data is unstable and fluctuates greatly. How to resolve this problem?
Manufacturer: This issue is usually caused by poor contact of test clips, aging test cables or serious oxidation of tap‑changer contacts. Please take the following measures: First, clean the surface of transformer tap‑changer contact terminals to remove oxide layer. Second, inspect test cables and alligator clips, replace aging wires. Third, keep the test cables away from high‑voltage power lines to reduce electromagnetic interference. If the problem still exists, please check the actual condition of the on‑load tap‑changer itself.
Question 3: Device screen freezes during continuous field test
Customer: When we carry out multiple tap position continuous test on‑site, the touch screen freezes and all operation buttons lose response. Does it mean internal hardware is damaged?
Manufacturer: Please do not worry. In most cases, it is temporary system exception instead of hardware damage. Unstable field power supply or strong electromagnetic interference may lead to system halt. Recommended procedure: Disconnect power supply, wait several minutes and restart the instrument. Avoid working under severe electromagnetic interference environment. If the fault recurs after restarting, please contact technical support, do not open the instrument housing privately.
Question 4: Transition resistance test value has large deviation
Customer: We complete the whole test procedure, but the measured transition resistance value has obvious deviation compared with the factory reference value of transformer. How can we fix this?
Manufacturer: Three main reasons lead to large resistance deviation: oxidized tap‑changer contacts, high contact resistance of test clamps, or incorrect parameter setup. First, polish tap‑changer contact terminals. Second, make sure all test clamps have reliable metal‑to‑metal connection. Third, double‑check instrument setup including tap total number and test mode. After adjustment, perform retest. If deviation remains, please record on‑site phenomenon and send to us for remote technical guidance.
Question 5: Precautions for Transportation, Handling and Field Test Operation
Customer: MY‑134 on‑load tap changer tester is precision test instrument. What key points should we notice for on‑site test, storage and transportation?
Manufacturer: Please comply with these important requirements: First, operators need professional training, be familiar with on‑load tap‑changer structure and instrument operation manual. Second, strictly follow wiring sequence, double‑check all test clips connection before starting test to avoid wrong connection damaging transformer or tester. Third, avoid violent impact and drop during transportation; use original hard protective case for storage and transit. Fourth, keep instrument away from moisture, heavy dust and corrosive environment. Store equipment in dry and well‑ventilated place. For first‑time use, read user manual thoroughly and do simulation test before real transformer measurement.
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
Question 1: No valid waveform displayed after wiring and power‑on
Customer: We have finished wiring and powered on MY‑134 OLTC tester. The touch screen works normally, but no valid switching waveform appears on the interface. What may cause this problem?
Manufacturer: This situation frequently occurs during on‑site transformer maintenance, please perform step‑by‑step troubleshooting. First, check whether each test clip is firmly connected to the tap‑changer terminal, confirm no loose connection or poor contact. Second, verify the test parameter settings, confirm the test channel is selected correctly. Besides, check whether the on‑load tap‑changer is in normal switching state. If above steps cannot solve the fault, please contact us promptly and do not disassemble the equipment yourself.
Question 2: Distorted or incomplete test waveform
Customer: The tester can collect partial waveform, but the waveform is distorted and incomplete; transition resistance test data is unstable and fluctuates greatly. How to resolve this problem?
Manufacturer: This issue is usually caused by poor contact of test clips, aging test cables or serious oxidation of tap‑changer contacts. Please take the following measures: First, clean the surface of transformer tap‑changer contact terminals to remove oxide layer. Second, inspect test cables and alligator clips, replace aging wires. Third, keep the test cables away from high‑voltage power lines to reduce electromagnetic interference. If the problem still exists, please check the actual condition of the on‑load tap‑changer itself.
Question 3: Device screen freezes during continuous field test
Customer: When we carry out multiple tap position continuous test on‑site, the touch screen freezes and all operation buttons lose response. Does it mean internal hardware is damaged?
Manufacturer: Please do not worry. In most cases, it is temporary system exception instead of hardware damage. Unstable field power supply or strong electromagnetic interference may lead to system halt. Recommended procedure: Disconnect power supply, wait several minutes and restart the instrument. Avoid working under severe electromagnetic interference environment. If the fault recurs after restarting, please contact technical support, do not open the instrument housing privately.
Question 4: Transition resistance test value has large deviation
Customer: We complete the whole test procedure, but the measured transition resistance value has obvious deviation compared with the factory reference value of transformer. How can we fix this?
Manufacturer: Three main reasons lead to large resistance deviation: oxidized tap‑changer contacts, high contact resistance of test clamps, or incorrect parameter setup. First, polish tap‑changer contact terminals. Second, make sure all test clamps have reliable metal‑to‑metal connection. Third, double‑check instrument setup including tap total number and test mode. After adjustment, perform retest. If deviation remains, please record on‑site phenomenon and send to us for remote technical guidance.
Question 5: Precautions for Transportation, Handling and Field Test Operation
Customer: MY‑134 on‑load tap changer tester is precision test instrument. What key points should we notice for on‑site test, storage and transportation?
Manufacturer: Please comply with these important requirements: First, operators need professional training, be familiar with on‑load tap‑changer structure and instrument operation manual. Second, strictly follow wiring sequence, double‑check all test clips connection before starting test to avoid wrong connection damaging transformer or tester. Third, avoid violent impact and drop during transportation; use original hard protective case for storage and transit. Fourth, keep instrument away from moisture, heavy dust and corrosive environment. Store equipment in dry and well‑ventilated place. For first‑time use, read user manual thoroughly and do simulation test before real transformer measurement.
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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