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Single‑phase Relay Protection Tester Portable Electromagnetic Relay Test Set For Over‑current Voltage Time Relay Calibration
| Place of Origin | China Mainland |
|---|---|
| Brand Name | MINGYANG |
| Model Number | MYJB |
| Minimum Order Quantity | 1 |
| Price | 1200usd |
| 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
| Type | Testing Machine | Voltage | 220V Electrical Equipment |
|---|---|---|---|
| Warranty | 2 Years | Power | ≤1000W |
| Place Of Origin | Hubei, China | Accuracy | ±0.5% |
| Customized Support | OBM, ODM, OEM | Protection Class | IP55 |
| Application | Electrical Testing | ||
| Highlight | ±0.5% Accuracy Relay Protection Tester,IP55 Protection Microcomputer Relay Tester,Compact Structure Auto Comprehensive Analyzer |
||
Product Description
Single‑phase Relay Protection Tester Portable Electromagnetic Relay Test Set For Over‑current Voltage Time Relay Calibration
Product Description
The internal AC and DC voltage and current sources of the ZXJB single-phase relay protection comprehensive tester adopt new power supply technology, providing convenience for on-site personnel to apply power supply instrument technology to other experiments. Under the premise of simplifying operation, this instrument increases its functions, capable of performing various calibrations on common relays. The panel is exquisitely arranged, making it easy and clear for the operator to operate. Therefore, it has won unanimous praise from a wide range of users.Product Alias
Single‑phase relay test set / Single‑phase relay calibrator / Portable relay protection tester / Electromagnetic relay tester / Over‑current & voltage relay test unit / Relay protection test box
Single‑phase relay test set / Single‑phase relay calibrator / Portable relay protection tester / Electromagnetic relay tester / Over‑current & voltage relay test unit / Relay protection test box
Features
- Tests multiple relay types: current relays, voltage relays, reclosing relays, intermediate relays, differential relays
- Equipped with fixed output capability for independent use as a voltage source
- Digital display for intuitive and accurate readings
- Compact structure with lightweight design for easy portability and movement
Technical Parameters
| Adjustable Output Source | Measurement Range | Measurement Accuracy |
|---|---|---|
| Alternating Current | 0~100A | ±0.5% |
| Alternating Current | 0~20A | ±0.5% |
| Alternating Current | 0~5A | ±0.5% |
| Direct Current | 0~20A | ±0.5% |
| Alternating Voltage | 0~250V | ±0.5% |
| Direct Current Voltage | 0~320V | ±0.5% |
Application Scenarios
FAQ
Question 1: Unable to output current and voltage after tuning/adjustment
Customer: We have completed wiring for relay testing on‑site. After power‑on, the display lights up normally, but no current or voltage output can be obtained when turning the adjustment knobs. What could be causing this?
Manufacturer: This situation is relatively common on‑site; we recommend conducting a sequential troubleshooting process: first, verify whether the power supply circuit is reliable and whether the power cord is loosely connected or disconnected; second, confirm that the wiring is correct by using the buzzer function of a multimeter to sequentially check the test cables, alligator clips, and the coil loop of the tested relay for continuity; additionally, pay close attention to the terminal distinction — strictly separate current terminals and voltage terminals, wrong terminal selection will result in no output; when performing relay testing, it is recommended to return all adjustment knobs to zero position before power‑on. If none of the above steps resolve the issue, please contact us promptly and do not attempt to disassemble the equipment yourself.
Question 2: The output value cannot reach the preset test value
Customer: The instrument can generate output; however, during parameter adjustment, the reading cannot rise to the required test value, and sometimes it even automatically cuts off output before reaching the setting value. How can this issue be resolved?
Manufacturer: This issue is typically caused by poor contact of test loop, load mismatch or excessive contact resistance of the tested relay. The following measures can be taken: First, check all alligator clips and terminal blocks, make sure every connection point is fastened tightly to reduce contact resistance; second, verify whether the load of tested relay is within the rated output range of the instrument; third, confirm that the test connecting wires are not excessively long or too thin; fourth, check for oxidation or poor contact on the contact points of the relay under test. If the test object itself has aging contacts or internal defects, it may also manifest as failure to reach target value; in such cases, it is recommended to first perform an insulation and contact inspection on the test object.
Question 3: Fan Fails to Start; Device Overheating Protection Activated
Customer: Halfway through the long‑time relay test, the fan suddenly stopped rotating; when I turned the device back on afterward, there was no response. Has it burned out?
Manufacturer: Do not panic; in most cases, this is a protective action rather than actual damage. If over‑current protection or overload protection is triggered, but the power is not cycled, the fan control circuit will enter a protective locked state; additionally, prolonged high‑load continuous operation or inadequate heat dissipation may cause the internal temperature to rise excessively, leading the power element's thermal protection to cut off the fan power supply. The correct procedure is: disconnect the power supply, allow the device to stand for approximately 30 minutes to cool down completely, then re‑power the device, check and reset the protection state, and then restart the system. If the device still fails to start, please contact us promptly and do not attempt to disassemble the equipment yourself.
Question 4: The main unit experiences frequent resets and tripping
Customer: During substation field tests, the tester host unit occasionally resets automatically, and at times, the power supply trips, disrupting the test progress. Is there any way to avoid this?
Manufacturer: There are generally three causes for host reset: power supply fluctuations, external strong magnetic field interference, or unreliable power input connection. It is recommended to use an independent power supply with sufficient capacity at the site to avoid sharing the same circuit with large equipment; keep the test area as far away as possible from strong electromagnetic interference sources. Regarding power supply tripping, verify whether the on‑site power supply capacity meets the device's input requirements, and inspect test loop for any abnormalities such as short‑circuit. If frequent resets still occur after troubleshooting, please provide us with the on‑site wiring diagram and a description of the observed phenomena, and we will dispatch technical personnel to provide remote guidance.
Question 5: Precautions for Transportation, Handling, and Wiring
Customer: This equipment set contains test leads and accessories inside the case. Are there any particular precautions to keep in mind for on‑site installation, operation and transportation?
Manufacturer: Yes, the following key precautions are provided: First, the device outputs adjustable AC and DC high current and voltage; therefore, it must be operated by professional personnel, at least two personnel are recommended for on‑site relay calibration, and strict adherence to your organization's electrical testing safety regulations is required; Second, the connection wires between all components must not be connected incorrectly, do not mix‑up current terminals and voltage terminals, as incorrect connections may damage the device and the tested relay; it is recommended that two personnel cross‑check the wiring after completion; Third, the instrument adopts aluminum alloy portable case; during transportation, avoid severe impacts or drops to prevent internal component damage; Fourth, prior to testing, clean the terminals of the test object thoroughly and ensure it remains dry to minimize the impact of surface leakage on the test results; Fifth, the device should be stored in a dry, well‑ventilated area, avoiding exposure to rain or moisture. For the first‑time use, it is recommended to thoroughly read the instruction manual and have an experienced electrical testing specialist perform the operation.
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
FAQ
Question 1: Unable to output current and voltage after tuning/adjustment
Customer: We have completed wiring for relay testing on‑site. After power‑on, the display lights up normally, but no current or voltage output can be obtained when turning the adjustment knobs. What could be causing this?
Manufacturer: This situation is relatively common on‑site; we recommend conducting a sequential troubleshooting process: first, verify whether the power supply circuit is reliable and whether the power cord is loosely connected or disconnected; second, confirm that the wiring is correct by using the buzzer function of a multimeter to sequentially check the test cables, alligator clips, and the coil loop of the tested relay for continuity; additionally, pay close attention to the terminal distinction — strictly separate current terminals and voltage terminals, wrong terminal selection will result in no output; when performing relay testing, it is recommended to return all adjustment knobs to zero position before power‑on. If none of the above steps resolve the issue, please contact us promptly and do not attempt to disassemble the equipment yourself.
Question 2: The output value cannot reach the preset test value
Customer: The instrument can generate output; however, during parameter adjustment, the reading cannot rise to the required test value, and sometimes it even automatically cuts off output before reaching the setting value. How can this issue be resolved?
Manufacturer: This issue is typically caused by poor contact of test loop, load mismatch or excessive contact resistance of the tested relay. The following measures can be taken: First, check all alligator clips and terminal blocks, make sure every connection point is fastened tightly to reduce contact resistance; second, verify whether the load of tested relay is within the rated output range of the instrument; third, confirm that the test connecting wires are not excessively long or too thin; fourth, check for oxidation or poor contact on the contact points of the relay under test. If the test object itself has aging contacts or internal defects, it may also manifest as failure to reach target value; in such cases, it is recommended to first perform an insulation and contact inspection on the test object.
Question 3: Fan Fails to Start; Device Overheating Protection Activated
Customer: Halfway through the long‑time relay test, the fan suddenly stopped rotating; when I turned the device back on afterward, there was no response. Has it burned out?
Manufacturer: Do not panic; in most cases, this is a protective action rather than actual damage. If over‑current protection or overload protection is triggered, but the power is not cycled, the fan control circuit will enter a protective locked state; additionally, prolonged high‑load continuous operation or inadequate heat dissipation may cause the internal temperature to rise excessively, leading the power element's thermal protection to cut off the fan power supply. The correct procedure is: disconnect the power supply, allow the device to stand for approximately 30 minutes to cool down completely, then re‑power the device, check and reset the protection state, and then restart the system. If the device still fails to start, please contact us promptly and do not attempt to disassemble the equipment yourself.
Question 4: The main unit experiences frequent resets and tripping
Customer: During substation field tests, the tester host unit occasionally resets automatically, and at times, the power supply trips, disrupting the test progress. Is there any way to avoid this?
Manufacturer: There are generally three causes for host reset: power supply fluctuations, external strong magnetic field interference, or unreliable power input connection. It is recommended to use an independent power supply with sufficient capacity at the site to avoid sharing the same circuit with large equipment; keep the test area as far away as possible from strong electromagnetic interference sources. Regarding power supply tripping, verify whether the on‑site power supply capacity meets the device's input requirements, and inspect test loop for any abnormalities such as short‑circuit. If frequent resets still occur after troubleshooting, please provide us with the on‑site wiring diagram and a description of the observed phenomena, and we will dispatch technical personnel to provide remote guidance.
Question 5: Precautions for Transportation, Handling, and Wiring
Customer: This equipment set contains test leads and accessories inside the case. Are there any particular precautions to keep in mind for on‑site installation, operation and transportation?
Manufacturer: Yes, the following key precautions are provided: First, the device outputs adjustable AC and DC high current and voltage; therefore, it must be operated by professional personnel, at least two personnel are recommended for on‑site relay calibration, and strict adherence to your organization's electrical testing safety regulations is required; Second, the connection wires between all components must not be connected incorrectly, do not mix‑up current terminals and voltage terminals, as incorrect connections may damage the device and the tested relay; it is recommended that two personnel cross‑check the wiring after completion; Third, the instrument adopts aluminum alloy portable case; during transportation, avoid severe impacts or drops to prevent internal component damage; Fourth, prior to testing, clean the terminals of the test object thoroughly and ensure it remains dry to minimize the impact of surface leakage on the test results; Fifth, the device should be stored in a dry, well‑ventilated area, avoiding exposure to rain or moisture. For the first‑time use, it is recommended to thoroughly read the instruction manual and have an experienced electrical testing specialist perform the operation.
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 | Qty | Remarks |
|---|---|---|---|
| 1 | Single‑phase Relay Protection Tester Main Unit | 1 set | Integrated unit with aluminum alloy carrying case |
| 2 | High‑current Test Cable (Red) | 1 pc | Heavy‑gauge cable for high‑current output |
| 3 | High‑current Test Cable (Black) | 1 pc | Heavy‑gauge cable for high‑current output |
| 4 | General‑purpose Red‑Black Test Leads Set with Alligator Clips | 1 set | For voltage loop measurement |
| 5 | AC Power Input Cord | 1 pc | Mains power supply cable |
| 6 | English User Manual | 1 copy | Operation instruction document |
| 7 | Calibration Certificate | 1 copy | Metrological test report |
Attachment Image
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