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Portable Three‑phase Microcomputer Relay Protection Tester | Protective Relay Test Set
| Place of Origin | China Mainland |
|---|---|
| Brand Name | Mingyang |
| Model Number | MY-S802 |
| Minimum Order Quantity | 1 |
| Price | 1800usd |
| Packaging Details | Carton |
| Delivery Time | 1 week |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union |
| Supply Ability | 1000pcs/ Month |
Product Details
| Efficiency | 95% | Inputvoltage | 220V |
|---|---|---|---|
| Certifications | CE, RoHS | Frequency | 50/60Hz |
| Insulationclass | Class B | Dimensions | 150mm X 100mm X 80mm |
| Weight | 2.5kg | Operatingtemperaturerange | -20°C To 60°C |
| Powerrating | 500W | Phase | Single-phase |
| Type | Transformer | Productname | Transformer Teser |
| Coolingmethod | Air-cooled | Outputvoltage | 110V |
| Material | Copper Winding, Steel Core | ||
| Highlight | 3 Phase Secondary Injection Relay Test Kit,500W Secondary Injection Relay Test Kit,110V 3 phase secondary injection test set |
||
Product Description
Portable Three‑phase Microcomputer Relay Protection Tester | Protective Relay Test Set
Product Overview
Intuitive operation interface with high-performance embedded industrial controller for easy and quick operation
High-fidelity linear power amplifier ensures accuracy of small current and stability of large current
USB interface for direct PC communication without adapter cables
Main control board with DSP FPGA structure and 16-bit DAC output generates 2000 high-density sine waves per week for improved waveform quality and testing accuracy
Product Alias
Three‑phase Microcomputer Relay Protection Tester / Three‑phase Protective Relay Test Set / Relay Protection Tester / Protective Relay Test Equipment / 3‑Phase Relay Protection Test System / Secondary Current Injection Tester
Features
(1) Current source: AC/DC voltage source, AC/DC current source
(2) Parallel output: three-phase parallel output (effective value): 0-90A
(3) Maximum output power per phase: 400 VA
(4) Frequency range: 0~1000Hz, accuracy 0.01Hz
(5) Switch input terminal: 8 pairs
(6) Harmonic number: Harmonic number
(7) Phase: 0~360, accuracy is 0.1 degrees (8)
DC current output: 0 ~ ± 10 A/phase, accuracy: 0.2% ± 5 mA
(9) Size: 320mm * 250mm * 165mm
(10) Time range: 1ms -9999s
(11) Measurement accuracy: 1ms
(12) Weight: 12.5kg
(3) Maximum output power per phase: 400 VA
(4) Frequency range: 0~1000Hz, accuracy 0.01Hz
(5) Switch input terminal: 8 pairs
(6) Harmonic number: Harmonic number
(7) Phase: 0~360, accuracy is 0.1 degrees (8)
DC current output: 0 ~ ± 10 A/phase, accuracy: 0.2% ± 5 mA
(9) Size: 320mm * 250mm * 165mm
(10) Time range: 1ms -9999s
(11) Measurement accuracy: 1ms
(12) Weight: 12.5kg
Technical Documentation
Application Scenarios
FAQ
FAQ
Question 1: Unable to complete protection action test, no trip signal received
Customer: We are using this three‑phase microcomputer relay protection tester for substation comprehensive relay test. After outputting fault quantity, the protection device does not feed back trip signal, and the test cannot proceed. What may cause this problem?
Manufacturer: This situation often occurs in field commissioning. Please follow sequential troubleshooting steps. First, check the wiring between Digital Input terminals and protection device trip contacts, confirm no loose or reversed wiring. Second, verify whether the protection device protection function is enabled and setting values are correctly input. Third, check if test current / voltage output amplitude reaches the protection action threshold. Besides, confirm whether dry‑contact or wet‑contact mode is correctly selected on the tester menu. If above steps cannot solve the fault, please contact our technical support promptly, do not disassemble the instrument by yourself.
Question 2: Output voltage / current cannot reach the set value
Customer: The instrument can run test program normally. But in the test process, the set value cannot be achieved; output value always keeps lower than expected. How should we resolve this issue?
Manufacturer: This fault may be caused by bad test wire contact, excessive load or wrong parameter setting. Take the following measures: First, check all test clamp terminals and test leads for aging, looseness or poor contact. Second, confirm that the total load of tested relay is within the instrument rated output capacity. Third, check whether output limiting parameters are activated in software menu. Fourth, inspect whether short‑circuit exists on secondary loop of the tested protection device. If the problem persists, please check the test object loop insulation status.
Question 3: Keypad no response; screen display normal
Customer: The screen lights up normally, but the physical keypad does not respond when pressing buttons. Can only operate by PC software. Is hardware damaged?
Manufacturer: Mostly it is setting or locking problem instead of hardware damage. First check whether local‑control mode is enabled; when remote PC control mode is activated, local keypad will be locked. Second, perform system soft reset on menu page. If still invalid, power off the whole device for 5‑10 minutes and restart. Do not open the instrument case. Contact our after‑sales team if keypad still fails.
Question 4: Frequent automatic reset and crash during field substation test
Customer: When working on‑site in substation, the main unit will reset or crash occasionally during running test, which interrupts test progress. How to avoid this situation?
Manufacturer: Three main reasons lead to reset fault: power supply fluctuation, strong electromagnetic interference and unreliable grounding. We suggest using independent stable power supply, do not share power loop with large‑power equipment. Ensure main unit grounding terminal connects to reliable grounding grid. Keep instrument and test wires away from high‑voltage equipment and strong interference source. If reset still occurs after troubleshooting, please provide on‑site wiring description and fault phenomenon, we will arrange technical support for remote guidance or on‑site service.
Question 5: Precautions for transportation, handling and field wiring
Customer: This relay protection tester is portable but contains precise internal modules. What special notes we should follow for transportation, carrying and on‑site connection?
Manufacturer: Please comply with key precautions below. First, the instrument outputs analog high‑quantity signal during test; reliable grounding must be connected before power‑on, operators shall follow local high‑voltage test safety specification. Second, double‑check wiring: distinguish Digital Input, Digital Output, voltage output and current output terminals, wrong connection will cause device damage. Third, avoid heavy impact and drop during transportation; internal precision modules are sensitive to violent vibration. Fourth, keep instrument working environment dry, prohibit working in heavy damp, condensation environment. Fifth, before formal test, check test leads for damage. For first‑time users, please read full user manual, finished by experienced secondary‑circuit testing personnel.
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
Customer: We are using this three‑phase microcomputer relay protection tester for substation comprehensive relay test. After outputting fault quantity, the protection device does not feed back trip signal, and the test cannot proceed. What may cause this problem?
Manufacturer: This situation often occurs in field commissioning. Please follow sequential troubleshooting steps. First, check the wiring between Digital Input terminals and protection device trip contacts, confirm no loose or reversed wiring. Second, verify whether the protection device protection function is enabled and setting values are correctly input. Third, check if test current / voltage output amplitude reaches the protection action threshold. Besides, confirm whether dry‑contact or wet‑contact mode is correctly selected on the tester menu. If above steps cannot solve the fault, please contact our technical support promptly, do not disassemble the instrument by yourself.
Question 2: Output voltage / current cannot reach the set value
Customer: The instrument can run test program normally. But in the test process, the set value cannot be achieved; output value always keeps lower than expected. How should we resolve this issue?
Manufacturer: This fault may be caused by bad test wire contact, excessive load or wrong parameter setting. Take the following measures: First, check all test clamp terminals and test leads for aging, looseness or poor contact. Second, confirm that the total load of tested relay is within the instrument rated output capacity. Third, check whether output limiting parameters are activated in software menu. Fourth, inspect whether short‑circuit exists on secondary loop of the tested protection device. If the problem persists, please check the test object loop insulation status.
Question 3: Keypad no response; screen display normal
Customer: The screen lights up normally, but the physical keypad does not respond when pressing buttons. Can only operate by PC software. Is hardware damaged?
Manufacturer: Mostly it is setting or locking problem instead of hardware damage. First check whether local‑control mode is enabled; when remote PC control mode is activated, local keypad will be locked. Second, perform system soft reset on menu page. If still invalid, power off the whole device for 5‑10 minutes and restart. Do not open the instrument case. Contact our after‑sales team if keypad still fails.
Question 4: Frequent automatic reset and crash during field substation test
Customer: When working on‑site in substation, the main unit will reset or crash occasionally during running test, which interrupts test progress. How to avoid this situation?
Manufacturer: Three main reasons lead to reset fault: power supply fluctuation, strong electromagnetic interference and unreliable grounding. We suggest using independent stable power supply, do not share power loop with large‑power equipment. Ensure main unit grounding terminal connects to reliable grounding grid. Keep instrument and test wires away from high‑voltage equipment and strong interference source. If reset still occurs after troubleshooting, please provide on‑site wiring description and fault phenomenon, we will arrange technical support for remote guidance or on‑site service.
Question 5: Precautions for transportation, handling and field wiring
Customer: This relay protection tester is portable but contains precise internal modules. What special notes we should follow for transportation, carrying and on‑site connection?
Manufacturer: Please comply with key precautions below. First, the instrument outputs analog high‑quantity signal during test; reliable grounding must be connected before power‑on, operators shall follow local high‑voltage test safety specification. Second, double‑check wiring: distinguish Digital Input, Digital Output, voltage output and current output terminals, wrong connection will cause device damage. Third, avoid heavy impact and drop during transportation; internal precision modules are sensitive to violent vibration. Fourth, keep instrument working environment dry, prohibit working in heavy damp, condensation environment. Fifth, before formal test, check test leads for damage. For first‑time users, please read full user manual, finished by experienced secondary‑circuit testing personnel.
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
| No. | Part Name | Specification | QTY | Remarks |
|---|---|---|---|---|
| 1 | Main Unit | Portable Three‑phase Microcomputer Relay Protection Tester | 1 Set | With LAN, USB, RS232 communication port, AC220V power supply |
| 2 | Power Cord | AC220V input power cable | 1 Pc | For main unit power supply |
| 3 | USB Communication Cable | USB‑A to USB‑B data cable | 1 Pc | USB connection between PC and tester |
| 4 | Network Cable | RJ45 Ethernet cable | 1 Pc | LAN communication for PC software control |
| 5 | Binary Input‑output Wire Harness | Multi‑color multi‑core signal cable | 1 Set | For Digital Input & Digital Output terminals |
| 6 | High‑current Alligator Clips | Color‑coded high‑power alligator clips(Red/Black/Yellow/Green) | 10 Pcs | For current loop connection |
| 7 | Voltage Banana Test Leads | Banana plug test leads(Red/Black/Yellow/Green) | 8 Pcs | For voltage output loop connection |
| 8 | Software U‑Disk | Contains PC software, driver, electronic user manual | 1 Pc | Software installation & test report export |
| 9 | Paper User Manual | Operation guide book | 1 Pc | Operation, wiring & troubleshooting instructions |
| 10 | Spare Fuse | Power supply fuse tube | 2 Pcs | Spare parts for power circuit |
Attachment Image
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