The use of adjustable resistor is more common, its main role is to limit the size of the current, so as to achieve the purpose of protecting the circuit. However, the resistor is only a small part of the circuit, but for the use of there are many details that we can not ignore, otherwise it will lead to the occurrence of abnormal faults, then presumably if you are not technicians, you must pay less attention to the basic knowledge of adjustable resistance bar, Here is a detailed explanation of the basic knowledge of adjustable power resistor.

Basic knowledge of adjustable resistor

1. Adjustable resistor to prevent local overload and failure, the use of resistance in the working current should not exceed the contact allowable rating. In order to avoid resistance compatibility can not afford, and thus may directly lead to adjustable resistor of the contact, conductive layer deterioration or burnout of the phenomenon.

2. The working voltage of the adjustable power resistor should not be overloaded. Otherwise, long-term overheating of the resistor will lead to electrical breakdown damage resistance, and if the working voltage of the resistor exceeds the safety value, so the internal resistor will also produce sparks, causing noise, and even the possibility of damage.

3. Usually adjustable resistors must be manually aged before they are used. The main purpose of this treatment is to reduce the instability of the resistors with the increasing use time, thus affecting the performance of the resistors.

4. Adjustable resistors are generally composed of resistors, skeleton and lead (lead) part, in which the lead root can not be bended, otherwise it is easy to lead to resistance pin broken.

5. Each adjustable resistor has a certain value of withstand voltage. If it exceeds this value, the resistor will break down, burn out or produce flying arc phenomenon. Therefore, when choosing resistors, the voltage withstand value of resistors must be fully taken into account.

6. Generally speaking, the quality of the adjustable power resistor should be checked before the resistors are used. Otherwise, the quality of the resistance is not up to the standard, and it will lead to a lot of security problems when it is used. Therefore, the resistance of the resistor can be measured with the resistance of the multimeter to see whether the resistance value and the nominal resistance are consistent, the difference between the value of the allowable error range of the adjustable resistance.

3386 adjustable resistor is commonly known as 3386 potentiometer, which is widely used in audio equipment, electronic equipment, household appliances and other equipment and other fields. The 3386 potentiometer is generally operated by turning the upper handle of the resistor, and then the movable piece will slide in the resistor, while the resistance between the other two fixed pins will change. As long as the adjustable resistance in 3386 rotary handle can be controlled to adjust the size of the general left to adjust the rotation is small, right to adjust the rotation is large. 3386 potentiometer is composed of some high precision components, in the event of failure, if not technicians, do not privately remove 3386 adjustable resistor for maintenance, in order to avoid their own unprofessional and improper operation to damage the resistance of other components.