How much can the short-circuit withstand the strength of the connector be qualified? from Nancy Guan's blog

When using connectors, we will inevitably encounter the situation of connector short circuits, so before purchasing or selecting connectors, we need to understand the short circuit withstand strength of connectors. 

The short circuit withstands the strength of connectors refers to the strength that can withstand the short circuit current impact under normal use conditions without causing damage to the connector's insulation or causing danger.

It has extremely important safety performance requirements. This article will explain the qualified standards for connector short circuit withstand strength and the solution to connector short circuits.

Qualified standards for connector short circuit withstand strength

The standards for connector short circuit withstand strength are jointly formulated by the International Electrotechnical Commission (IEC) and the national standard (GB), and have different standard requirements in different fields. In general civil appliances and commercial electronic equipment, the IEC 60335 standard is generally used for testing. In the IEC 60335-1 standard, the requirements for connector short circuit withstand strength are as follows:

1. Stability requirements: During the short circuit test, the connector should remain stable and should not be loose.

2. Current strength requirements: The short circuit current strength should be determined according to the scope of use, the rated current, and the rated voltage of the equipment.

3. Short-circuit time requirement: The short-circuit test time should be 1 second.

4. Strength requirement: Before the short-circuit test begins, the power supply should be connected to the end of the line, not the connector itself. The insulation part of the connector should be able to withstand twice the rated voltage. No insulation breakdown should occur during the short-circuit test.

5. Size requirement: The size of the connector withstand strength test sample must comply with the provisions of GB 2099.1, and the use environment and requirements of the connector should be taken into account during the test.

In China, GB 2099.1 also stipulates the short-circuit withstand strength of the connector, which is the same as IEC 60335-1, but according to different use environments, the test current and test cycle are also different. When using connectors, we should choose and use them according to the actual situation and requirements, and try to avoid using connectors that are not allowed by the specifications.

The above is an introduction to the qualified standards for connector short-circuit withstand strength. If we encounter a short circuit in the connector, how should we solve it? The following is a popular science for you:

How to deal with connector short circuit

A connector short circuit refers to a short circuit between two circuits that should not be connected due to poor wire contact or equipment failure during use. At this time, the current will flow directly from one circuit to another, which may cause problems such as overcurrent or equipment damage. Timely processing is required to ensure the safe and stable operation of the equipment. The following is the treatment method for connector short circuits:

1. Disconnect the power supply: First, when the connector is found to be short-circuited, the power supply of the equipment should be cut off immediately to prevent the current from passing through the short-circuit path and causing greater damage.

2. Troubleshooting: Find the cause of the connector short circuit, such as poor wire contact, equipment circuit failure, or poor performance of the connector used.

3. Replace the connector: If there is a problem with the connector itself, it is generally necessary to replace the connector, because, after a long time of use, the contact point of the connector will turn color due to oxidation, resulting in poor contact, the current will rise sharply, and eventually short-circuit, causing equipment damage or safety hazards. According to statistics, about 90% of the faults are caused by short circuits caused by connector failures.

4. Adjust the contact position: If the cause is poor contact of the wire, it is necessary to adjust the contact position between the wire and the connector to ensure that the signal transmission reaches the optimal state.

5. Repair equipment failure: If the short circuit is caused by a circuit failure of the equipment, the equipment needs to be tested and repaired, the fault needs to be eliminated, and the normal use of the equipment needs to be ensured.

6. Preventive measures: During normal use, pay attention to keeping the equipment and connectors clean, and regularly check the contact between the equipment and connectors to prevent short circuit problems in the connectors.

In short, the short circuit problem of the connector needs to be eliminated in time to reduce the factors that cause equipment failures to ensure the safe and stable operation of the equipment.

In future production, high-quality connectors with good raw materials need to be selected. I believe that the performance of the connectors in the future will be better improved, thereby reducing the probability of short circuits in the connectors and increasing the service life of equipment and electrical appliances.