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Grounding Systems

Sistemas de Puesta a Tierra

Grounding Systems

Grounding systems are of great importance to ensure the safety of personnel, equipment, facilities and assets of companies.

In Procainsa we are specialized in the implementation of high performance grounding systems, especially in high resistivity areas (rocky areas, mountainous areas, tunnels, etc.) and in conditions of high corrosivity (brackish water level, sea water, etc.).

We develop initial assessment and engineering (including resistivity survey) to implement specific solutions of grounding systems with low resistance value.

Our company is linked to the electrical protections sector and has developed some types of grounding systems to improve substantially the conventional grounding systems.

Start-plates, Ungrounded Metal Structural or Similars

Grounding using star plates or plates are installed in artificial soil based on the ditch of 2 to 3 m³ and filling with vegetable soil and other additives to reduce the resistivity of the soil (Ledoux management).

The grounding values obtained at these installations can be considered as acceptable for high resistivity ground. Due to the lack of soil compaction, these values shall be improved after installation and remaining stable for 5 to 10 years

Sticks Fe/Cu - Fe Galvanized rods

The sticks are the most common grounding system, due its easy installation.

The sticks constitute the most widespread system of grounding because of its easy installation. Considering that the introduction of these is done by threading, the grounding resistance values are obtained immediately, and are better than those of the plate system. However, these values should be understood as exclusively instant, since by the effect of corrosion on the steel, the speed of loss of the initial resistance is very fast, plus the sticks can suffer damage during the installations.

Grounding Rigid Graphite Electrode

The use of rigid graphite electrode as an anode with backfill, to for the improvement of the contact with
the soil, is a very reliable grounding system. Since it is an electrode consisting entirely of graphite, it is not severely affected by corrosion, unlike what happens with metals.

As far as the values of remote resistance in grounding in soils of different resistivities, their behaviour is very similar or even better to the star plates, and much better than the sticks. The value evolution during its life, is unbeatable due the minimum corrosion rate, therefore its life is longer than the traditional systems. This grounding system is maintenance-free. Due to all these characteristics, the rigid graphite electrode is ideal for deep and superficial grounding, as it guarantees long life and more than acceptable performance.

Zinc Anodes

Zinc anodes are an ideal solution for cathodic protection systems against corrosion of grounding systems when they are made of galvanized steel conductors.

Another advantage, they also prevent the galvanic corrosion that is a hard issue in grounding systems of steel structures (buried tanks or tank bottoms) against bare copper conductors. The recent standards MIE-ITC-01 and MIE-ITC-02 require the installation of grounding with galvanized steel (or insulated copper) conductors and Zinc sticks in refineries and fuel storage tank farms. These technical considerations extend to facilities such as gas stations (MIE-ITC-04), chemical plants, etc.

The main features of these anodes are;

• Great performance due to low electrical resistance
• Large area of dispersion and good contact with the soil as they are presented with a bag filled with backfill (bentonite base)
• Easy handling and easy installation
• Possibility to determine their state of degradation without dig up them


The PICRON anodes are designed for high performance grounding systems, especially for deep or semi- deep grounding, swampy land, with high groundwater levels (delta areas) and even in very aggressive waters (marine environments or directly in Subsea), for high and low voltage electrical installations, lightning and computer or robotic equipment.

PICRON anodes can be considered the highest guaranteed and stable grounding system on the market.

Its main characteristics are:

• Unlimited lifetime (life> 30 years), due to its minimal corrosion degradation
• It can be used in the form of single electrodes or array electrodes, for installation in vertical holes from diameters of 160 x 3000 mm, or can be installed directly deposited on marine sediments

Free maintenance, due they do not require periodic water to establish their conductivity

Grounding Systems for Building Foundations

In order to avoid galvanic corrosion (Cu-Fe) problems from bare copper groundings and the steel, at Procainsa, we have developed combined grounding systems with PICRON electrodes and bare galvanized steel cables.

In buildings, usually with underground plants and already within groundwater levels, it is very difficult to construct conventional array groundings. The solution provided by Procainsa consists of the distribution of PICRON electrodes below the hearth (fittings, lightning rods, services, elevators, etc.), connected to the galvanized steel cable that is installed inside the building hearth before its concreting. The neutral is connected to a specific PICRON electrode connected directly by proper insulated cable.

Electrodos de Picrón
Sistemas de Puesta a Tierra

Products and Services

Protección Catódica -Procainsa

Cathodic protection is an active method against corrosion of a buried or submerged metal structure.

Gestión de la Integridad

Main tool for the knowledge of the state of the integrity of the pipe. We are specialists in inspection techniques for underground pipelines.


Procainsa combines experience in operation and field inspections as well as data management to ensure safe pipeline operation.

Sistemas de Puesta a Tierra

Placed by star-plates, javelins electrodes, make these earthing systems are highly reliable.


The safest way to date, to protect against the direct impact of lightning, is its capture, derivation and dissipation to earth.


All our courses have as a principle “Learning by doing”, having a high practical component in the client’s facilities.