Sequence for static grounding

After the transport vehicles have come to a complete stop, the static grounding alarm should be connected. When one of the static grounding clips is opened, the alarm sounds; by attaching the open grounding clip to the grounding wire of the tank truck and the other static clip to the grounding post, the alarm stops, indicating that a reliable connection has been established. Relevant loading and unloading operations can be carried out.

An electrostatic grounding clip with an alarm is very safe.

For the loading and unloading of flammable and explosive liquids, anti-static measures are crucial. Connect the ground wire before starting the operation, keep the driver’s key safe during the operation, remove the ground wire after the operation is complete, and then return the key to the driver. The ground wire must not be removed during the operation. The ground fault alarm activates only when the resistance is above 600 ohms; the absence of an alarm does not necessarily mean that the grounding is satisfactory, nor does the presence of an alarm necessarily indicate that it is unsatisfactory. Generally, for applications with high requirements, the ground resistance should not exceed 10 ohms. [This post was last edited by limingshuguang on 2008-1-4 at 11:39]

We adopted the same approach as on the 2nd floor, using an electrostatic grounding device. Before loading the vehicle, one clip of the grounding device is attached to the designated position on the vehicle; if the connection is proper, the grounding device will not emit any alarm sound

Electrostatic grounding must be carried out first, and it is essential to ensure that the grounding is proper and reliable. One cannot rely solely on calling the police to determine whether the grounding is proper and reliable; it is best to measure the grounding resistance after the grounding has been completed, and only proceed with further work once it is confirmed to be satisfactory. The function of grounding is, first, to eliminate any static electricity that may already be present, and second, to conduct away the static electricity generated during operations. In environments with gases or liquids that are highly flammable and explosive, the static grounding resistance should not exceed 10 ohms ； For flammable and explosive solids, the static grounding resistance shall not exceed 100 ohms. This post was last edited by limingshuguang on 2008-1-6 at 08:37.]

The static ground resistance for dedicated grounding should be no more than 100 ohms according to the specifications, right? When shared with electrical equipment or lightning protection grounding, it is necessary to ensure that the grounding resistance when shared with electrical equipment is less than or equal to 4 ohms, and when shared with lightning protection grounding, it should be less than or equal to 10 ohms! This post was last edited by limingshuguang on 2008-1-6 08:38.]

The static grounding system is now well-established, and following the procedures will not cause any problems

As a supplementary point, static grounding must be removed only after the work is completed and all other equipment has been taken away.

Our company shares the static grounding and lightning protection grounding, with a grounding resistance of less than 4 ohms. I really have never seen an electrostatic grounding clip

Static grounding can also be designed as an interlock with the loading and unloading pumps

The alarm sound of the static grounding device is powered by a power source – dry cell; therefore, it is necessary to replace the battery in a timely manner when using it, to prevent the device from failing to emit an alarm and thus leading to accidents due to inadequate grounding.

The original poster is referring to production operations; it seems that some people mentioned loading and unloading vehicles instead. Moreover, isn’t static grounding fixed in place? Static clamps are used in the production process; I’ve never encountered that situation, but it could lead to accidents if it’s forgotten! ! !