Monitoring control system Earth-Rite

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The Earth-Rite Plus type earthing control system is designed to eliminate the risk of ignition of the flammable atmosphere as a result of the jump of an electrostatic spark. The solution of this series is most often used for rail tankers and various types of containers and tanks. Principle of operation of the system The principle of operation of the Earth-Rite Plus system is based on continuous control of the connection of the tanker (or other object requiring earthing) with the earthing point. This connection is made by attaching a cable with a clamp to the road tanker structure. The system is calibrated to activate the devices responsible for the medium transfer (pumps, valves, etc.) only when the resistance of the earth connection is less than 10 Ω. When this resistance increases above the limit, e.g. due to wire damage or breakage of the clamp, the process will stop. The system is equipped with a light-emitting diode signalling device that informs the operator about the correct earthing of the road tanker. A red light means that earthing has not been done properly and therefore the system will not allow the start of the unloading/loading process. In addition, if an incorrect earthing is detected during transshipment, the process will be stopped. System components earthing monitoring unit, junction box for hanging up the clamp, earthing clamp with a wire. Loading or unloading of railway wagons with liquids or powdered solids can cause strong electrostatic charges, resulting in a serious risk of creating a potentially explosive atmosphere.