Anti-static grounding notes.
The metal sampler, calibration ruler, and
temperature detector should be grounded via a conductive rope. In order to
avoid rapid discharge, the resistance between the two ends of the sampling rope
should be 107~109Ω.
The electrostatic grounding electrode
resistance is required to be no more than 100Ω, and the contact resistance of
the pipeline flange connection is no more than 10Ω. Notes and requirements for
anti-static grounding:
Notes
Grounding is used to eliminate static
electricity on conductors, but cannot be used to eliminate static electricity
on insulators. Since an insulator with static electricity is directly grounded
through a conductor, it is equivalent to directing the ground potential to the
insulator, which will increase the risk of spark discharge, so the method of
anti-static grounding is only suitable for conductors.
The anti-static grounding device can be
shared with the work, protection and repeated grounding devices of electrical
equipment. The ground connection wire should ensure sufficient mechanical
strength and chemical stability. The connection should be reliable without any
interruption. The anti-static grounding resistance value should usually not
exceed 1MΩ.
The conductive ground is essentially a
grounding measure. Using it can not only lead away the static electricity on
the equipment, but also help to lead away the static electricity accumulated on
the human body. Conductive ground often refers to ground such as concrete,
conductive rubber ground, conductive synthetic resin, conductive wood,
conductive terrazzo, and conductive ceramic tiles. When using conductive ground
or conductive paint to spray the ground, the resistance between the ground and
the ground should not exceed 1MΩ, and the contact area between the ground and
the grounding conductor should not be less than 10cm2.
In some dangerous places, in order to
reliably ground the shaft, conductive lubricating oil can be used or slip rings
and carbon brushes can be grounded.
In order to eliminate the static
electricity of the human body, you can wear conductive work shoes (such as
leather-soled shoes or conductive rubber-soled shoes), which is essentially a
grounding measure. The resistance of conductive work shoes should be 10MΩ.
