JBC-3E Three phase Relay Protection Tester

JBC-3E Three phase Relay Protection TesterTechnical Specifications:

1. Working power supply: AC 380V ± 10% 50Hz three-phase five wire

2. Output voltage: AC 3 × 0-420V DC 1 × 0-580V

3. Output current: AC 3 × 0-50A DC 1 × 0-5A

4. Isolation auxiliary power supply: AC 110V/220V

DC 110V/220V (converted output)

5. Chronometer: 0-9999.999 seconds

6. Volume/Weight: 470 × 340 × 420 (mm)/22kg (Power Box)

470 × 340 × 420 (mm)/20kg (instrument box)

Experimental function introduction:

1. Voltage and current tests

Choose one phase voltage or one phase current as the variable, and change it automatically or manually until the relay acts.

When the voltage is greater than 125V and the current is greater than 30A, the voltage can be output using line voltage, such as UAB, UBC, UCA. The current can be output in two-phase parallel or three-phase parallel. Note that the phase of the current should be selected as the same phase. The high current output time should be as short as possible, and the initial value can be set to a constant value of 90% to shorten the test time. When implementing multi-stage overcurrent protection, it is possible to directly output 1.2 times the current setting, so that the measured action time is accurate.

2. Frequency test

The default value for the initial frequency is 50Hz, and users can modify this value. Select variable frequency, enter the appropriate frequency step size, click "Start Test", and all current and voltage frequencies will change.

3. Power direction test

JBC-3E Three phase Relay Protection TesterThe protection device generally adopts a 90 degree wiring method, with a low voltage setting of 60V. During testing, UA can be set to 60V with a phase of 0 degrees; UB=0V， Phase is 0 degrees; In this way, the line voltage UAB is 60V, the phase is 0 degrees, and then the voltage is fixed. The amplitude of the IC is fixed (usually 5A), and the phase of the IC is changed to measure the two action boundary angles. The 90 degree wiring method outputs according to the "UAB, IC", "UBC, IA", "UCA, IB" modes. The 0-degree wiring outputs according to the "UAB, IA", "UBC, IB", "UCA, IC" modes. Sensitivity angle=(Boundary angle 1+Boundary angle 2)/2.

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