Grounding Systems & Electrical Safety Procedures
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Laying Ground Facilities Project
The process involves several key steps:
- Research
- Determination
- Design
- Calculation of resistance
- Computation step of crack on the outside of the installation
- Calculation of contact and step voltages inside the installation
- Checking
- Research
- Correction
Wenner Method
The Wenner method is the most used and recommended technique to measure the resistivity of the ground.
High Voltage Open Circuit Procedure
- Open the switch.
- Open the disconnectors.
High Voltage Circuit Closing Procedure
- Close the disconnectors.
- Close the switch.
Lockout or Interlock Device
A lockout or interlock device is the set of operations aimed at preventing the operation of a device and maintaining it in a given position.
Verification of Absence of Tension
It is necessary to verify that the installation has no tension.
Grounding Definition
Grounding is the action of joining, by a driver element, a ground, an aircraft, or a part of the electrical installation.
Grounding and Short-Circuiting
This is the action of joining together all phases of an installation using a driver component that has previously been connected to ground.
Agent Working Area
The agent working area is the person who sets the work area software in compliance with the work supervisor and removes the appropriate work permits.
Work Supervisor
The work supervisor is the person who is present at a work site, directed by appointment or delegation of their superior, and in charge of it.
Protected Area
A protected area in a high-voltage installation discharge is the area where the boundaries are defined by the poles on the ground and short-circuited, placed at the cutoffs in the sources of tension, and in proximity, if any.
Work Area
A work area is a designated area defined by the agent and work area to deliver to the work supervisor.
Golden Rules of Electrical Safety
- Visible or effective opening/splitting from all sources of tension.
- Locking or blocking of apparatuses.
- Verification of the absence of tension.
- Grounding and short-circuiting.
- Signaling and outlining the work area.
Work Areas
Forbidden Zone
The space between the element and the voltage limit for specialized personnel.
Local Area
The space between the limit for specialized personnel and the limit for non-specialized personnel.