The output voltage and current range of the relay protection tester are determined according to its design specifications and actual application requirements. These ranges may vary depending on different models and manufacturers. The following is an overview of the output voltage and current range of the relay protection tester in general:
1. Output voltage range
General range:
The output voltage range of the relay protection tester can cover from tens of volts to thousands of volts. Common output voltage ranges include 100V, 220V, 380V, 600V, 1000V, etc.
Specific mode and range:
In DC voltage mode (DC), the output voltage range is mostly analog output and can be modularly expanded according to user requirements. Its output voltage range may include 0-120V and 0-300V.
In AC voltage mode (AC), the output voltage is generally a digital tube output, and the voltage value can be controlled by the keyboard, or the voltage value can be changed in real time as the test action proceeds. Similarly, common AC output voltage ranges also include 0-120V and 0-300V.
For the DC+AC voltage mode, the output voltage range combines the output capabilities of DC and AC voltages, and can also be configured according to specific needs.
It should be noted that the output voltage range required for different test items is different. For example, in the overvoltage protection test, it may be necessary to output 1.2 times or 1.5 times the nominal voltage as the test voltage, and the output voltage range may be higher.
2. Output current range
General range:
The output current range of the relay protection tester is generally between a few milliamperes and hundreds of amperes. Common output current ranges include 10mA, 50mA, 100mA, 500mA, 1A, 5A, etc. In some high-voltage power systems, the output current of the relay protection instrument may also be as high as 20A.
Specific applications:
The output current range selection needs to be determined based on the rated current and actual needs of the relay protection device to be tested. During the test, it should be ensured that the output current of the tester can meet the test requirements of the device under test, and the impact of the test environment on the current stability should also be considered.
Comprehensive considerations
When choosing a relay protection tester, in addition to considering its output voltage and current range, you also need to pay attention to factors such as the tester's accuracy, stability, functional diversity, and ease of operation. At the same time, you also need to choose the appropriate tester model and specifications based on specific test requirements and application scenarios.
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