High Voltage Connector Precautions

High voltage connectors are interconnects that direct current beyond the voltage limit. The IEC defines high voltage as a voltage above 1000 VAC or 1500 VDC. However, it is incorrect to classify high-voltage connectors according to IEC standards in the end. Connectors are considered high voltage when they conduct current that poses a safety hazard to the human body or triggers an arc. For example, currents exceeding 50V can cause a sudden increase in the heart rate. When the conductors are close to each other, the connector carrying 120V generates an arc. High voltage connectors in all shapes and sizes on the market. For example, can be used as a single pin, multiple pin numbers, serial connection, and panel mount. Some applications that use high-voltage connectors work in harsh environments such as extreme temperatures or pressures.

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Here's what to note: For high voltage connector designs, fire hazards and safety hazards do exist. Therefore, when using high-voltage connectors, the following design suggestions should be considered: 1. High voltage of insulating materials will damage the insulator, so connectors made of high electrical strength dielectrics should be selected. For example, PTFE and silicone rubber are more susceptible to electric shocks. In addition, it is also important that the insulator does not have a porous surface to prevent COVID-19 discharge. Two: The crawling distance and the interval leakage distance are the shortest distances between the guide bodies along the thermal insulation material, and the gap is the shortest path between the guide bodies and the air. These two parameters are crucial to prevent arc discharge and COVID discharge. When selecting a connector, make sure there is sufficient leakage distance and clearance at the specified voltage. Three: Foreign particles and moisture in the operating environment air will aggravate arc discharge and new crown discharge. Even if a reliable connector is used in a laboratory environment, the same level of security cannot be assumed when deployed. High voltage connectors are classified according to contamination levels, ranging from 1 to 4. If we place the product in a contaminated environment, in order to meet safety standards such as UL, IEC, etc., connectors with high contamination levels must be used. Four: PCB layout ensures the safety of high-voltage designs There is more to choosing the right connector. In electronic products, PCB layout has become an important factor to ensure circuit safety and reliability. Here are some basic rules that must be followed when designing with high-voltage connectors or terminal blocks in a PCB. Please ensure that there is sufficient clearance between the high pressure and the adjacent walk. Avoid sharp edges on high-voltage running lines to avoid arcing. Take safety measures such as fuses to prevent short circuits. If the walking wire can also carry large currents, make sure it has sufficient thickness and width.

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