Adjustable temperature soldering iron power line company is three inserted, but there is a adjustable jack with a grounding wire clip, I opened it, the ground wire and the power line is connected with the hole, but the resistance received jack with a 1M there. Excuse me, what is this principle, so take what role did not feel ah.
The grounding wire plus the 1M is obviously intended to reduce the current of the ground wire. Electric appliance for preventing leakage and short circuit.Grounding is the most important link in the safety technology of electrical equipment. Different equipment should be treated differently, random grounding, and sometimes electrical equipment will be burned. However, the interventional resistance is big, and may cause electric shock. Grounding is a branch of learning.Grounding resistance can also effectively combat interference from the ground.
In the case of asymmetric external circuit, there is current passing through the ground wire, and the resistance is added to the ground wire to prevent the current from too large and protect the safety of the users.
That is anti-static, should be attached to your anti-static wrist strap, to prevent human electrostatic damage to components, and resistance is to control the discharge current, there will be no electric shock feeling.You can be confirmed from the electrostatic, the body often with static electricity, especially in dry weather higher voltage, sometimes touching the metal causes a spark, electric shock feeling. So in the electronic circuit assembly operation in order to prevent electrostatic breakdown components need to be grounded in the body to eliminate static electricity, to avoid electric shock when wiring 1M sense resistor limits the discharge current, because the total charge is not much, although the 1M resistance is large, also to ensure sufficient to release the safety requirements of components.
