One of the common anti-static methods in the factory (testing instrument and grounding method)
There are many mission factories that use a lot of anti-static measures such as anti-static protective measures and anti-static bags. Why do static damage often occur? The common anti-static methods in the following factories, look at your factory without any tricks.
1. No anti-static product testing equipment
The most common mistake is that many companies use a lot of anti-static products, but they are not equipped with common anti-static product testing instruments. We know that each product has a certain period of use, and the quality is good or bad. If there are no common testing instruments, we do not know whether the product is damaged or not. This will not achieve anti-static effects.
2. Ground connection is not good
a. The anti-static system must have an independent and reliable grounding device. The grounding resistance should be less than 10Ω. The embedding and testing methods should meet the requirements of GBJ 97.
b. The anti-static ground wire shall not be connected to the power supply neutral line and shall not be shared with the lightning protection ground wire. Because lightning strikes and other phenomena will affect the performance and personal safety of the product through the loop.
c. Use three-phase five-wire system to supply power, and its ground wire can be used as anti-static ground wire (but the neutral wire and ground wire must not be mixed).
d. The cross-sectional area of the grounding main line shall not be less than 100mm2; the cross-sectional area of the trunk line shall be not less than 6mm2; the grounding line of equipment and workbench shall be a multi-strand plastic coated wire with a cross-sectional area of not less than 1.25mm2, and the color of the grounding wire shall be yellow-green It is appropriate.
e. Anti-static equipment connection terminals should ensure reliable contact, easy to install and disassemble, and allow the use of various clip-on connectors, such as squid clips, plugs, etc.
f. The grounding system monitoring alarm should be installed in the workplace where the grounding resistance value is high.