Product introduction
The UHV secondary current injection tester is a professional instrument used for testing and verifying protective relay systems. Its main function is to inject a controllable simulated secondary current into the relay device, reproduce fault conditions in the power system, trigger relay operation, and record the response behavior, thereby checking the correctness and reliability of the protection system.It is widely used in utilities, substations, industrial power systems, and research laboratories for routine maintenance, commissioning, acceptance testing, and fault simulation.
Product parameters of secondary current injection tester
Ac current output
|
Output precision |
0.2 class |
|
Phase current output (effective value) |
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 |
420VA |
|
Output power at maximum output of three- phase parallel current |
900VA |
|
Three parallel current maximum output allowable operating time |
10s |
|
Frequency range (fundamental wave) |
20～1000Hz |
|
Harmonic frequency |
1 ~ 20 times |
Dc current output
|
Output precision |
0.2 class |
|
Output current |
0 ~ ±10A/ phase, 0 ~ ±30A/ tera |
|
Maximum output load voltage |
20V |
Ac voltage output
|
Output precision |
0.2 class |
|
Phase voltage output (effective value) |
0～120V |
|
Line voltage output (effective value) |
0～240V |
|
Phase voltage/line voltage output power |
80VA/100VA |
|
Frequency range (fundamental wave) |
20～1000Hz |
|
Harmonic frequency |
1 ~ 20 times |
Dc voltage output
|
Output precision |
0.2 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
|
three-phase |
note |
|
|
Switching input |
7 road |
empty contact: 1 ~ 20mA, 24V |
|
potential contact access："0"：0～ +6V; "1"：+11 V～ +250V |
||
|
Switching output |
2 for |
DC：220V／0.2A;AC：220V／0.5A |
|
Time measurement |
measurement range is 0.1ms ~ 9999s |
measurement accuracy is 0.1ms |
Volume weight
|
three-phase |
|
|
Overall dimensions |
400×300×180mm3 |
|
Single weight |
22kg |
|
Power supply |
AC 220V±10%,50／60Hz |
|
Environment temperature |
-10℃ ～ +50℃ |
Parts Details
Product Features of secondary current injection tester
1. High-precision current output
Current output error is controlled within ±0.5%
Digital control circuit provides real-time feedback adjustment
High output stability and good repeatability
Reduces the risk of relay misoperation caused by measurement deviation
2. Multi-functional control system
Current adjustment function
Fault simulation settings
Real-time data monitoring
Centralized test control
Simplified operation process for higher testing efficiency
3. Portable design
Compact portable case structure
Typical weight range: 10–15 kg
Equipped with handle for easy field transport
Suitable for substations and distributed on-site testing environments
4. Temperature control and cooling system
Built-in temperature monitoring module
Automatic air-cooling system control
Cooling fan starts automatically when preset temperature is reached
Prevents overheating of electronic components and maintains measurement accuracy
5. Automatic protection mechanism
The system is equipped with multiple safety protections:
Overcurrent protection (e.g., beyond 100A set limit)
Overtemperature protection (e.g., above 70°C threshold)
Abnormal voltage detection
Automatic shutdown with alarm output
Effectively prevents equipment damage and testing errors.
Application Areas
1, Power industry
The power industry is the main application area of secondary current injection testers. The secondary current injection device in the power system is an important equipment to ensure the safe operation of the power system. It can timely cut off the faulty circuit when the power system fails, protecting the safety of power equipment and personnel. Therefore, the reliability and accuracy of relay protection devices are crucial for the stable operation of power systems. The relay protection tester can perform various tests and verifications on relay protection devices to ensure their normal operation and improve the reliability and safety of the power system.
2, Petrochemical industry
The petrochemical industry is another important application area of secondary current injection testers. In the petrochemical production process, various equipment and pipelines require relay protection to ensure production safety. The relay protection tester can test and verify the relay protection devices of petrochemical equipment to ensure their normal operation and improve production safety.
3, Railway transportation industry
The railway transportation industry is also an application field of secondary current injection testers. The signal equipment and power equipment in the railway transportation system require relay protection to ensure the safety and stability of train operation. The relay protection tester can test and verify the relay protection devices in the railway transportation system, ensuring their normal operation and improving the safety and stability of train operation.
4, Aerospace industry
The aerospace industry is also an application field for secondary current injection testers. In the aerospace system, various equipment and systems require relay protection to ensure the safety and stability of the aerospace system. The secondary current injection tester can test and verify the relay protection devices in aerospace systems, ensuring their normal operation and improving the reliability and safety of aerospace systems.
fAQ
Q1: What tests can the secondary current injection tester perform?
A: It can perform tests on current, voltage, frequency, phase, time, action values, and simulate fault states such as short circuit, grounding, overcurrent, undervoltage, overvoltage, and differential according to different protection devices.
Q2: Does the device support three-phase or six phase testing?
A: Different models of microcomputer relay protection testers have different current and voltage output channel configurations, commonly including three-phase and six phase configurations. When purchasing, suitable models can be selected based on the type of protection and number of channels that need to be tested.
Q3: Can the secondary current injection tester test differential protection?
A: Okay. It can be used for testing transformer differential protection, line differential protection, etc. It can simulate different current amplitudes, phases, and fault states to check the operating characteristics of protection devices.
Q4: Can distance protection be tested?
A: Okay. It can simulate different fault points and types by setting parameters such as voltage, current, phase, and impedance, and is used for testing the action range, action time, and protection logic of distance protection.
Q5: Does the microcomputer relay protection tester need to be calibrated regularly?
A: It is recommended to perform regular calibration based on usage frequency, on-site environment, and relevant quality management requirements to ensure the accuracy of output and measurement results. For equipment used for measurement, calibration, or high-precision testing, it should be calibrated according to the corresponding standards and laboratory requirements.
Q6: How to choose a suitable secondary current injection tester?
A: Suggest selecting based on actual testing objects and projects, rather than just comparing prices. Before procurement, it is necessary to clarify the type of protection that needs to be tested, maximum output current/voltage, number of phases, number of channels, automatic testing requirements, on-site portability, and whether a test report is required, and then select the matching model.
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