Electrical Contractors

The Technician in Electricity and Electronics is a technician of superior level qualified to realize the operations of installation, maintenance, and repair of circuits of low tension, command of motors and systems of automatic control.

It will perform its functions with emphasis on safety, professional ethics, technical quality criteria indicated by the company and current electrical regulations. Both a job well done, ethics and professionalism are important in this type of work because in this way the customer is trusted and work is secured for the future.

Electrical contractor function

Carry out the distribution and installation of low voltage power lines and special lines. Carry out the maintenance of urban and buildings electrical installations and equipment and interpret plans and electrical diagrams, applying the established regulations and norms.

Contractor’s tasks

  • Assemble, install, maintain and repair low voltage indoor and outdoor power lines and grounding systems.
  • Assemble, install, maintain and repair electrical panels and automations and their internal wiring.
  • Install, maintain and repair static and dynamic devices and machines.
  • Assemble, install, maintain and repair unique building installations.

The electrical connection of electrical installations can be medium, high or low voltage. The electrical contractor is responsible for all lighting circuits, power circuits, and special systems, both in new buildings and in renovations. Be sure to check if the electrician specialises in a particular segment such as air conditioning installation or service.

When it is necessary to provide additional capacity in already built industrial buildings that need to be expanded, the industrial electrical installations need a load analysis to rationally supply the growing requirements of this new equipment, through modifications to the substation or generating generator groups.

Electrical contractor specialty

Within this subspecialty, maintenance service is planned for industrial electrical installations and electrical equipment used in an industrial plant or construction. The distinctive component of an industrial electrical installation is the electrical substation, and it is that the companies that supply electrical energy commonly supply the large consumers in medium and high voltage.

In this type of electrical installation, the customer is the owner of the reducer transformer and switching equipment necessary to operate the circuits of that industrial electrical installation; all this equipment is housed in a cabinet called unit compact substation that is formed by three sections or compartments: the high voltage, the reducing transformer, and the low voltage.

Optimal installation

In all industrial substation electrical installations, medium voltage current limiting fuses are required, which are used as overcurrent protection devices in the electrical installation.

The proper selection of a fuse is based on several factors such as the nominal current of the circuit, the operating voltage, the frequency of the system, the interrupting capacity and the need for adequate coordination with other overcurrent protection devices of the same electrical installation.

The arrester is another important component of the industrial electrical installation. It is connected to the main bus at the terminals of the disconnector blades and provides the electrical installation with the necessary protection against transient voltages and sustained high voltages that it needs.

The section or compartment of high voltage receives the conductors of the electrical installation of the main connection by means of suitable terminals. In this section, transformers of potential and current owned by the supplier followed by disconnector blades without a load that necessarily have a mechanical block that prevents them from being opened with the main switch in the closed position.