Short circuit experiment of lighting electrical ready board

The short-circuit test of the lighting electrical ready board is an important test to test its safety performance. By simulating short-circuit faults, the equipment's tolerance can be verified to ensure the protection of personal and property safety in abnormal situations. The following is a detailed explanation of the experiment:

1、 Experimental purpose

Verify the tolerance of the electrical ready board under short-circuit conditions, ensuring that its structure, components, and connections do not suffer damage or failure under short-circuit current impact.

Check the operational reliability of short-circuit protection devices (such as circuit breakers and fuses) to ensure timely circuit disconnection in the event of a short circuit.

Evaluate the temperature rise characteristics of the electrical ready board to prevent fires or insulation damage caused by high temperatures due to short circuits.

2、 Experimental standards

International standards: IEC 61439-1:2011、IEC/TR 61641:1998。

Chinese National Standards: GB 7251.1-2013、GB/T 16917.1-1997。

3、 Experimental equipment

electrical ready board: The lighting electrical ready board to be tested.

Power supply: Adjustable DC or AC power supply, providing stable short-circuit current.

Ammeter: Monitor the magnitude of short-circuit current.

Temperature gauge: records temperature changes of electrical ready boards and key components.

Short circuit simulation device: such as a short circuit generator or short circuit fixture.

4、 Experimental steps

Preparation before the experiment:

Check whether the installation and wiring of the electrical ready board meet the standard requirements.

Ensure that all circuit breakers, fuses, and other protective devices are in normal working condition.

Clean up the experimental site to ensure safety.

Set short-circuit parameters:

According to the standard requirements, set the magnitude and duration of the short-circuit current. For example, IEC 61439-1 specifies that the peak and duration of short-circuit current should simulate actual fault conditions.

Apply short circuit:

Apply a short-circuit fault at the output end of the electrical ready board through a short-circuit simulation device.

Real time monitoring of short-circuit current using an ammeter to ensure it meets the set value.

Observation and recording:

Observe the performance of the electrical ready board during the short circuit process and record whether there are any abnormal sounds, smoke, or sparks.

Regularly measure the temperature of the electrical ready board casing and key components using a thermometer, and record the temperature rise data.

Check if the short-circuit protection device operates within the specified time and cuts off the circuit.

Post experiment inspection:

Disconnect the power supply and wait for the electrical ready board to cool down before conducting a visual inspection.

Check whether the electrical ready board is deformed, burnt or damaged.

Check whether the internal components (such as busbars, circuit breakers, wiring terminals, etc.) are intact and whether the connections are loose.

5、 Experimental result judgment

Qualification assessment:

The electrical ready board did not experience explosion, combustion, or severe deformation during the short circuit process.

The short-circuit protection device operates within the specified time to cut off the circuit.

The temperature rise shall not exceed the limit specified by the standard.

After the experiment, the electrical ready board can still work normally and the insulation performance meets the requirements.

Unqualified judgment:

Explosion, combustion or severe deformation of the electrical ready board.

The short-circuit protection device has not been activated or has been activated for too long.

The temperature rise exceeds the limit specified by the standard.

After the experiment, the electrical ready board cannot work normally or the insulation performance decreases.

6、 Precautions

Safety first: During the experiment, it is necessary to strictly follow the safety operating procedures, wear protective equipment, and prevent electric shock or burns.

Equipment calibration: All testing equipment needs to be calibrated before the experiment to ensure the accuracy of the measurement data.

Environmental control: The experiment should be conducted in a dry and well ventilated environment to avoid humidity or dust affecting the experimental results.

Repeated experiment: To ensure the reliability of the results, multiple short-circuit experiments can be conducted on the same electrical ready board, and the average value can be taken for analysis.

7、 Experimental significance

Through short-circuit experiments, the safety performance of lighting electrical ready boards can be verified in extreme situations, ensuring that they can effectively protect personnel and equipment safety in the event of short-circuit faults, and reduce the risks of fire and electric shock. Meanwhile, the experimental results also provide important basis for the design and improvement of electrical ready boards.