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Home » News » industry information » Precautions for capacitor installation (I)

Precautions for capacitor installation (I)

Views: 1     Author: Site Editor     Publish Time: 2018-09-22      Origin: Site

Capacitors used within the rated performance range specified in the product design specification shall be avoided for use in the following situations when confirming the use and installation environment:

 

a. high temperature (temperature exceeds the maximum use temperature);

 

b. Overcurrent (current exceeds the rated ripple current), after the applied ripple current exceeds the rated value, the capacitor body will overheat, the capacity will decrease, and the life will be shortened;

 

c. Overvoltage (voltage exceeds rated voltage), when the voltage applied to the capacitor is higher than the rated working voltage, the leakage current of the capacitor will rise, and its oxygen property will deteriorate in a short period of time until it is damaged;

 

d. Apply reverse voltage or AC voltage. When the DC aluminum electrolytic capacitor is connected to the circuit in reverse polarity, the capacitor will cause the electronic circuit to be short-circuited, and the resulting current will cause damage to the capacitor. If it is possible to apply a positive voltage to the negative lead in the circuit, a non-polar capacitor is selected;

 

e. Used in circuits that repeatedly charge and discharge abruptly, such as fast charging applications, the service life may be reduced due to capacity drop, temperature rise, etc.

 

f. Environment in direct contact with water, salt water, oil or condensation, environment full of harmful gases (sulfide, ammonia, etc.), direct sunlight, ozone, ultraviolet light and radioactive materials, vibration and impact conditions It is forbidden to use capacitors in harsh environments beyond the scope of the samples and specifications;

 

g. When the capacitor is installed, there is space above the explosion-proof valve of the capacitor, avoid wiring and other components above the explosion valve, and around the capacitor and the circuit board to avoid installing heating elements.


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