Table of Contents
- 1 What are the reasons for carrying out safe isolation?
- 2 What are the hazards of safe isolation?
- 3 What are the steps for isolation?
- 4 What is the positive isolation?
- 5 What are isolation procedures?
- 6 What is tag out procedure?
- 7 When do you need to use a safe isolation procedure?
- 8 Is it safe to switch off an isolation device?
What are the reasons for carrying out safe isolation?
“Adequate precautions shall be taken to prevent electrical equipment, which has been made dead in order to prevent danger while work is carried out on or near that equipment, from becoming electrically charged during that work if danger may thereby arise.”
What is the purpose of an isolation procedure?
The purpose of isolating an installation is to ensure the safety of the people who are working on it, preventing them from receiving an electric shock. The most common way to disconnect a system is to use the main switch (also known as the isolator switch).
What are the hazards of safe isolation?
Safe isolation has long been a procedure carried out by a competent person in order to safely isolate electrical circuits or equipment before electrical work is undertaken. Despite this, every year people within the construction industry suffer electrical shock and serious burns of which some are sadly fatal.
How do you carry out a safe isolation procedure?
Safe Isolation Procedure
- Obtain permission to start work (a Permit may be required in some situations)
- Identify the source(s) of supply using an approved voltage indicator or test lamp.
- Prove that the approved voltage indicator or test lamp is functioning correctly.
- Isolate the supply(s)
- Secure the isolation.
What are the steps for isolation?
However, every isolation procedure should include the following basic steps:
- Shut the plant down.
- Identify all energy sources and other hazards.
- Identify all isolation points.
- Isolate all energy sources.
- De-energise all stored energies.
- Locking out all isolation points.
- Tagging.
- Testing isolation procedure.
What is the importance of isolation in electricity?
All electrical installations have an isolation means at least at the consumption metering point. Isolation has the purpose of protecting against electrical hazards electric shock, burn and ballistics – the effects of arc flash.
What is the positive isolation?
Positive isolation methods are those which remain effective even if there is equipment failure or operator error. These techniques apply not only to vessels, piping and tanks but also to pneumatic and hydraulic equipment.
What is effective isolation in safety?
Disconnecting or making the equipment safe to work on involves the removal of all energy sources and is known as isolation. Some common forms of energy isolation include electrical circuit breakers, disconnect switches, ball or gate valves, blind flanges, and blocks.
What are isolation procedures?
An isolation procedure is a set of predetermined steps that should be followed when workers are required to perform tasks such as inspection, maintenance, cleaning, repair and construction.
What is Loto process?
Lock out, tag out (LOTO) is a safety procedure used in industry and research settings to ensure that dangerous machines are properly shut off and not able to be started up again prior to the completion of maintenance or repair work.
What is tag out procedure?
The term “lockout tagout” refers specifically to procedures used to ensure that equipment is shut down and inoperable until maintenance or repair work is completed. They are used to keep employees safe from equipment or machinery that could injure or kill them if not managed correctly.
What do you mean by electrical isolation?
Isolation is the electrical or magnetic separation between two circuits and often used to separate two distinct sections of a power supply. The isolation provides a barrier across which dangerous voltages cannot pass in the event of a fault or component failure.
When do you need to use a safe isolation procedure?
This chart shows the safe isolation procedure that you should use when working on electrical systems and equipment. You’ll receive a printed copy of this from your Training Provider, but it’s also here as a handy reference to keep electronically.
How is a point of isolation locked off?
The Electrical Safety First Guidance states that “…The point of isolation should be locked off using a unique key or combination retained by the person carrying out the work or the appointed person, and a caution notice attached to the point of isolation.
Is it safe to switch off an isolation device?
Switch off installation/circuit to be isolated. It should never be assumed that equipment is dead because a particular isolation device has been placed in the OFF position. Verify with voltage indicating device that no voltage is present. It is important to ensure that the correct point of isolation is identified before proving dead.
Is there a safety lock on an isolator?
For more complex isolations, other systems of work exist, but the principle of a safety lock for each person working on that system remains. Circuit breakers, fuses and isolators are all capable of being secured in the open position.