JBC-4A single-phase relay protection tester

JBC-4A single-phase relay protection testerTechnical Specifications:

1. Working power supply: AC 220V ± 10% 50Hz
2. Output voltage: AC 0-250V adjustable
DC 0-250V adjustable
3. Output current: AC 0-100A 0-50A adjustable
DC 0-10A adjustable
4. Digital stopwatch: 0-9999.999 seconds
5. Volume/Weight: 465 × 330 × 330 (mm)/32kg

JBC-4A single-phase relay protection testerCommunication experiment

The module is a universal and comprehensive testing module, which consists of independent 3-phase current and 4-phase voltage, or independent 6-phase current and 6-phase voltage. By setting the corresponding voltage or current as variables, assigning a certain step size to the variables, and selecting appropriate testing methods (such as manual, automatic, action stop, action return), it is convenient to test the action values, return values, and action times of various voltage and current protections, and automatically calculate the return coefficient.

1 . variable selection

You can choose a single variable or multiple variables to be variable at the same time. Just check the "Variable" column with a "√".

2. Step size of variables

The size of the step size can be selected according to the requirements of testing accuracy. For example, voltage step size, current step size, etc.

3. Each step time

During automatic testing, the interval time for each step change is invalid during manual testing.

4. Automatic test (action stop)

When outputting the program, the variables involved in the change will automatically change according to the set step size and interval time, while other values remain fixed. Until the relay acts, record the action value and time, stop outputting, and the program automatically returns.

5. Automatic test (action return)

When outputting the program, the variables involved in the change will automatically change according to the set step size and interval time, while other values remain fixed. Until the relay acts, record the action value and action time. At this point, do not stop outputting, and then change in the opposite direction according to the set step size and interval time until the relay contact returns. Stop outputting and record the return value, and the program will automatically return.

6. Manual test (action stopped)

The program continuously outputs the current value. When the "increase" button is clicked, the variable amount increases by one step, and when the "decrease" button is clicked, the variable amount decreases by one step. If the relay acts, the action value and time can be recorded, and the tester stops outputting at this time, and the program automatically returns.