Product Introduction
Microcomputer relay protection testers are developed based on the technical specifications (discussion draft) for microcomputer relay protection test equipment issued by the ministry, incorporating extensive user feedback and a comprehensive analysis of the strengths and weaknesses of existing domestic products. By fully leveraging advanced microelectronics technology, a new generation of compact yet highly functional devices has been achieved.
Featuring a large-screen LCD display and an intuitive rotary mouse controller, the tester offers powerful standalone operation capable of performing most routine tests. When connected to a computer, it provides even more advanced functionalities for complex test scenarios.
Compact in size yet high in accuracy, this tester combines the superior performance and advanced features of larger devices with the portability, ease of operation, and high reliability typically found in smaller units. It delivers excellent performance at a reasonable cost, making it an ideal tool for maintenance personnel in the field.
Mga Tampok ng Produkto
1、Standard Output Configuration: The device features a standard output of 4-phase voltage and 3-phase current, allowing flexible combination for various protection testing requirements. A single-phase voltage can reach up
to 120V, while a single-phase current can reach 40A (for 10 seconds). The three-phase current can output up to 120A. The fourth-phase voltage Ux is a versatile voltage item that can be configured as 3U0, a synchronization
check voltage, or any user-defined voltage value for output.
2、User-Friendly Standalone Operation: The device supports standalone operation with intuitive controls via a large LCD screen and an ergonomic rotary mouse, all displayed in Chinese. It can perform most on-site testing and
verification tasks, validate various relay and microcomputer protection devices, and simulate complex transient, permanent, and transitional faults for comprehensive testing. Ready to use upon startup, it offers effortless
operation.
3、Dual Operation Modes: When connected to a computer, the device operates via a full Chinese-language software suite on the Windows platform. This enables the execution of complex, highly automated verification tasks,
such as easy testing and scanning of various protection settings. It also supports real-time test data storage, vector diagram display, fault waveform plotting, and on-line report printing.
4、Advanced Software Functionality: The software offers robust capabilities for executing large-scale, highly automated verification projects, including three-phase differential testing, fast bus transfer, backup auto-reclosing
tests, and line protection synchronization checks. It allows effortless testing and scanning, playback of various faults, real-time data storage, vector diagram display, and on-line report printing.
5、Versatile Digital I/O Interface: The device includes 7 contact inputs for three-phase applications and 2 pairs of dry contact outputs. Input contacts are compatible with 0–250V voltage signals and can be automatically
identified. Input and output contacts can be expanded according to user requirements.
6、Large LCD Display: Equipped with a high-resolution 320×240 dot matrix LCD screen, all operations and processes are clearly displayed in Chinese on the interface. The intuitive and clear layout ensures easy navigation and
result viewing.
7、Integrated Protection Features: Designed with an optimized cooling structure, the device incorporates multiple reliable protection measures and a soft-start power function. It also provides fault self-diagnosis and automatic
lockout capabilities for enhanced safety.
8、Independent DC Power Output: The device includes dedicated DC power outputs of 110V and 220V for auxiliary testing requirements.
9、High Cost Performance: As a cross-disciplinary integrated product, it combines advanced technologies from multiple fields. It delivers the performance of large testers at the price of compact units, offering an excellent
performance-to-cost ratio.
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Mga Parameter ng Produkto
Kasalukuyang output ng AC
| Output precision | 0.2 class |
| Kasalukuyang output ng phase (epektibong halaga) | 0～40A |
| Triple current output (effective value) | 0～120A |
| Long-term permissible operating value of phase current (effective value) | 10A |
| Maximum output power of phase current | 450VA |
| Output power at maximum output of three- phase parallel current | 900VA |
| Three parallel current maximum output allowable operating time | 10s |
| Frequency range (fundamental wave) | 0~ 1000Hz (online) 0~300Hz (stand-alone) |
| Harmonic frequency | 0~ 20 times (online) 0~6 times (stand-alone) |
DC kasalukuyang output
| Output precision | 0.5 class |
| Kasalukuyang output | 0 ~ ±10A/ phase, 0 ~ ±30A/ terad |
| Maximum output load voltage | 20V |
Output ng boltahe ng AC
| Output precision | 0.2 class |
| Phase voltage output (epektibong halaga) | 0～120V |
| Output ng boltahe ng linya (epektibong halaga) | 0～240V |
| Phase voltage/line voltage output power | 80VA/100VA |
| Frequency range (fundamental wave) | 0~ 1000Hz (online) 0~300Hz (stand-alone) |
| Harmonic frequency | 0~ 20 times (online) 0~6 times (stand-alone) |
Output ng boltahe ng DC
| Output precision | 0.5 class |
| Phase voltage output amplitude | 0～±160V |
| Line voltage output amplitude | 0～±320V |
| Phase voltage/line voltage output power | 70VA/140VA |
Switch quantity and time measurement
| tatlong yugto | note | |
| Switching input | 8 road | empty contact: 1 ~ 20mA, 24V |
| potential contact access："0"：0～ +6V； "1"：+11 V～ +250V | ||
| Switching output | 4 pair | DC：220V／0.2A；AC：220V／0.5A |
| Time measurement | measurement range is 0.1ms ~ 9999s | measurement accuracy is 0.1ms |
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Advantages
1. High precision testing
2. Fully functional
3. Efficient automatic testing
4. Convenient operation
5. Compact and lightweight
6. Easy to maintain
7. High reliability and stability
Application Fields
1. Power system
Line protection: used to verify relays and microcomputer protection devices for current, voltage, time, differential, frequency, etc., simulate instantaneous, conversion and other faults for whole group testing, and verify the correctness of protection actions.
Main transformer differential protection: Test the performance of differential protection to ensure accurate operation in case of faults and prevent damage to the main transformer.
Excitation control: Test the excitation control system to ensure that it adjusts the generator output power according to the grid demand.
2. Department of Electrical Manufacturing and Power Operation
Manufacturing department: used for the research and development, production, and quality control of relays and protection devices, conducting comprehensive performance testing through fault simulation.
Operation department: used for regular calibration and maintenance of protective devices, timely detection and handling of hidden dangers, and ensuring system safety and reliability.
3. Research and Teaching
Research institutions: support theoretical research and experimental verification of relay protection, and promote technological development.
Higher education institutions: As a teaching tool, help students understand the principles and applications of relay protection.
4. Special fields (railway, aviation, etc.)
Testing differential protection devices applied to special systems such as railway traction power supply to ensure their stable operation under complex working conditions.
Frequently Asked Questions
1. Can relay protection testers be used near live equipment?
not allow. The microcomputer relay protection tester can only be connected for measurement after confirming that the tested equipment is completely powered off, tested, and grounded.
2. How long does the battery life of the relay protection tester last?
It can work continuously for about 4 to 6 hours when fully charged. It is recommended to prepare a backup battery or use an external power adapter on site.
3. Is the measurement result of the relay protection tester greatly affected by temperature?
influential. When used within the ambient temperature range of 5 ℃ to 40 ℃, there may be deviations in measurement data at extreme temperatures.
4. What does the "fixed value" of relay protection device mean?
Fixed value "refers to various parameters set in the relay protection device, such as operating current, delay time, etc. The accuracy of these values directly affects whether the protective device can correctly judge and act.
5. What are the characteristics of a good relay protection tester?
It should have the characteristics of high precision, multifunctionality, easy operation, strong data storage and analysis capabilities. The testing equipment of Wuhan UHV Power Technology Co., Ltd. has done quite well in this regard.
