Product introduction
The 3 phase relay tester is a special device used to detect and calibrate relay protection devices in power systems. By outputting stable three-phase AC voltage and current signals, it helps power engineers test the accuracy and response speed of relay protection equipment, ensuring that relay protection equipment can effectively respond to various power faults in actual use, such as short circuit, overload, overvoltage, undervoltage, etc.
Product features
Superior Anti-interference Ability
The 3 phase relay tester can still maintain high-precision operation in complex electromagnetic environments. This is because it uses multi-layer shielding and filtering technology internally, isolates external electromagnetic interference through multi-layer conductive material shielding layers, and uses high-performance filtering circuits to remove high-frequency and power frequency interference signals. This design ensures the reliability of test data, especially suitable for ultra-high voltage substations and power equipment maintenance sites, ensuring that the equipment can provide stable test support even under strong electromagnetic interference conditions.
High-precision Data Measurement
The 3 phase relay tester uses a 24-bit high-precision ADC converter, which can accurately convert signals to microvolt levels, ensuring that the measurement error is less than 0.1%. Compared with the 0.5% error range of ordinary test equipment, this equipment has higher measurement accuracy, ensuring more accurate test results, and providing reliable data support for the protection and troubleshooting of power equipment.
Intelligent Operating System
The 3 phase relay tester has a built-in intelligent system that supports automatic calibration, fault self-checking and data analysis functions, greatly simplifying the operation process. It can store more than 100,000 sets of test data and supports wireless data transmission, which is convenient for subsequent data analysis and remote operation and maintenance. This intelligent design improves the efficiency of traditional manual debugging and data storage by more than 50%, and is particularly suitable for power engineering projects with high-frequency testing requirements.
Efficient Battery Life
The 3 phase relay tester is equipped with a lithium battery pack, which can run continuously for 16 hours on a single charge, which is 20% longer than ordinary products. The battery life exceeds 2,000 charge and discharge cycles, ensuring that the product can still operate stably for a long time under frequent use, reducing the cost of maintenance and battery replacement, and is particularly suitable for field testing work without power supply for a long time.
Product parameters of relay protection Tester
AC current output
|
Phase current output (effective value) |
0~40A |
|
Output Precision |
0.2 degree |
|
3 phase parallel current output (effective value) |
0~120A |
|
A Long-time Phase current |
450VA |
|
Maximum output power of 3 parallel current |
900VA |
|
Maximum Permitted work time of 3 parallel current |
10s |
|
Frequency range (fundamental) |
0~1000Hz |
|
Harmonic time |
0~20 |
DC current output
|
Output current |
0～±10A / phase, 0～±30A / 3 parallel |
|
Output Precision |
0.5 degree |
AC voltage output
|
Phase voltage output (effective value) |
0~120V |
|
Output Precision |
0.2 degree |
|
Line voltage output (effective value) |
0~240V |
|
Phase voltage / Line phase output power |
80VA / 100VA |
|
Frequency range (fundamental) |
0~1000Hz |
|
Harmonic time |
0~20 |
DC voltage output
|
Phase voltage output range |
0～±160V |
|
Output Precision |
0.5 degree |
|
Line voltage output range |
0～±320V |
|
Phase voltage / Line phase output power |
70VA / 140VA |
Time measurement
|
Time measuring range |
0.1ms ～ 9999s |
|
accuracy of measurement |
＜0.1ms |
Core application scenarios of 3 phase relay tester
1. Debugging of new/renovation projects
Functional testing: Verify the operational behavior of the protective device under fault conditions (such as sudden changes in current, voltage drops, impedance changes).
Fixed value setting: By simulating different types of faults (such as single-phase grounding and phase to phase short circuit), determine the protection setting value (such as overcurrent protection start value and time delay).
2. Regular inspection and preventive testing
Annual inspection/overhaul: Check the long-term stability of the protective device to avoid refusal or misoperation caused by component aging.
Key tests:
Time characteristic testing: Verify whether the action time meets the standard.
Logic verification: By simulating complex fault sequences (such as acceleration after reclosing and CT disconnection locking), check the correctness of the protection logic.
Fault waveform analysis: Compare the output waveform of the tester with the waveform data recorded by the protection device to locate the cause of the fault (such as CT saturation and harmonic interference).
3. Troubleshooting and accident analysis
Fault reproduction: Simulate the system state during historical faults (such as voltage, current, frequency), analyze whether the protection action is correct.
Typical scenario:
After the main transformer of a certain substation tripped, the waveform of the fault current was reproduced by a tester to confirm whether the differential protection was erroneously activated due to the reverse polarity of the CT.
When the line protection trips beyond the level, test whether the time difference between the upper and lower level protections is reasonable.
Anti interference test: Inject high-frequency noise or transient overvoltage to verify the EMC performance of the protection device.
4. Research and Teaching
Algorithm validation: Test the feasibility of new protection principles, such as transient based traveling wave protection and wide area differential protection.
Teaching demonstration: By simulating typical faults such as two-phase short circuits and oscillation locking, help students understand the logic of protection actions.
FAQ
Q1: In which scenarios is the 3 phase relay tester mainly used?
A: Mainly used for on-site verification, factory testing, fault recording analysis, and research and development verification of relay protection devices.
Q2: What are the main application areas of 3 phase relay protection testers?
A: Mainly used in substations, power plants, power companies, power engineering companies, electrical equipment manufacturing enterprises, relay protection laboratories, research institutions, and large industrial enterprises for the debugging, inspection, maintenance, and fault analysis of relay protection devices.
Q3: The reading of the 3 phase relay tester is inaccurate. What could be the reason?
A: Possible reasons include: the tester itself is not calibrated, on-site wiring errors, incorrect power grid parameter settings, or problems with the tested protection device itself.
Q4: Is the software operation of the microcomputer relay protection tester complicated?
A: The device is controlled through a human-computer interaction interface, and testers can set parameters such as current, voltage, frequency, phase, and time. For commonly used protection projects, the operation process can be simplified through preset testing modules.
Q5: Can test results be saved?
A: Support the function of saving test data and test reports, making it convenient for technical personnel to perform data analysis, historical record queries, and test report management. The specific storage method and reporting function depend on the device model and software configuration.
Q6: Can the 3 phase relay tester be used for on-site testing?
A: Okay. The equipment can be used in substations, power plants, power construction sites, relay protection laboratories, and power equipment maintenance sites. The portable design model is particularly suitable for on-site debugging and regular calibration.
Q7: What is the after-sales service of the 3 phase relay tester?
A: We can provide equipment installation guidance, operation training, software usage guidance, technical consultation, troubleshooting, and maintenance support services. For export projects, attention should also be paid to remote technical support, operation manuals, and spare parts supply capabilities.
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