One Person, One Lock Control of Hazardous Energy H&S Program Standard 7-45 Course Code 600009 TRACCESS Module - 2017
Control of Hazardous Energy Training BU Specific “Group BU Competency Lockout” Increasing Competency “Group Advanced Lockout” Intermediate “Personal Lockout” “One Person / One Lock” BASIC “Control of Hazardous Energy Principles” 1
Contents Control of Hazardous Energy One Person / One Lock Principle – YOUR Role 4-Step Isolation Process Personal Lock Applications Individual Devices Group Isolations (Use of Lock Box) Control Reliable Interrupt (CRI) Remove Your Lock Test Questions 2
What are our Learning Objectives During this training module you will learn to; 1. Know the different types of hazardous energy 2. Understand the difference between primary and stored energy 3. Explain the term “danger zone” 4. Describe the two ways of controlling hazardous energy 5. Understand the 4-step isolation process 6. Describe the concept of “one person, one lock” 7. Understand how to apply your personal lock to a single device 8. Know the steps of applying your personal lock to a group lockbox 9. Understand a “control reliable interrupt” safety circuit and how to apply your personal safety lock 3
Control of Hazardous Energy One Person / One Lock Principle – YOUR Role 4-Step Isolation Process Personal Lock Applications Individual Devices Group Isolations (Use of Lock Box) Control Reliable Interrupt (CRI) Remove Your Lock Test Questions 4
Why Control Hazardous Energy? Hazardous energy must be controlled in order to keep people safe. We maintain control by locking out equipment. Your personal safety lock will protect you from these types of hazardous energy. • chemical energy • radiation • electrical energy • kinetic energy/stored energy • hydraulic energy • potential energy (gravity) • pneumatic energy • mechanical energy • thermal energy 5
Two Forms of Hazardous Energy 1. Primary energy is the energy (e.g. electricity) which flows into a system from outside. 2. Stored energy is energy that (remains) build up in system and is present even after primary energy sources have been isolated. 6
What’s a Danger Zone? • A danger zone is the area around a machine or process (i.e., front, back, sides, top and bottom) where a hazard is created by the motion of the machine components, or by energized equipment or by stored energy. • Access to the danger zone may be required to complete specific repetitive operational tasks, during maintenance tasks, inspection, or when guards must be removed for the completion of a task. 7
Two Ways of Controlling Hazardous Energy There are two ways to control hazardous energy to make a danger zone safe for entry: 1. Isolation: uses a mechanical isolating device to physically prevent the energy flow (e.g. circuit breaker, disconnect switch, valve, block, pin, or blanking flange). A lock is applied to the isolating device. 2. Control reliable interrupt : uses control power to interrupt the flow of energy to a process, equipment, machine or device. A personal lock is applied to a switch or interlocked access gate mechanical latch device. 8
Control of Hazardous Energy One Person / One Lock Principle – YOUR Role 4-Step Isolation Process Personal Lock Applications Individual Devices Group Isolations (Use of Lock Box) Control Reliable Interrupt (CRI) Remove Your Lock Test Questions 9
One Person – One Lock Principle • Every employee who is required to lock out will be issued at least one personal safety lock. • YOU will NOT personally isolate any live equipment. • All isolations will be performed by trained and competent employees. • No employee will work on equipment or enter an area secured with another person’s lock. Personal safety locks must be: • Individually keyed or keyed alike; • Supplied with one unique key; • Long shanked; • Identified with name of user and either their department or perm number on the lock or on a tag, and; • Used only by person identified on the tag 10
Using a Personal Safety Lock Your personal safety lock could be used to lock out: CRI Rotary Switch QMB Switch Electrical Breaker Blocking Device Line Blind Gate/Globe Valve Vent/Drain Valve Lock Box 11
Our “RULE” “You must lock out, when required ” is one of Dofasco’s four mandatory “Rules” protecting employees from “Life Threatening Situations”. STOP. CHALLENGE. CHOOSE. 12
Control of Hazardous Energy One Person / One Lock Principle – YOUR Role 4-Step Isolation Process Personal Lock Applications Individual Devices Group Isolations (Use of Lock Box) Control Reliable Interrupt (CRI) Remove Your Lock Test Questions 13
4-Step Isolation Process An isolation is achieved only when the following four steps are complete: Step 1 Isolating applicable components of the machine from Isolation all power sources Step 2 Locking the device in the isolated (safe) position Locking Step 3 Dissipating or restraining any stored energy Dissipation Verifying isolation effectiveness (i.e., checking or Step 4 testing that all hazardous energy is eliminated or Verification controlled). 14
Control of Hazardous Energy One Person / One Lock Principle – YOUR Role 4-Step Isolation Process Personal Lock Applications Individual Devices Lock Box Isolation (Multiple Isolation Devices) Control Reliable Interrupt (CRI) Remove Your Lock Test Questions 15
Personal Lock Applications You will use your personal safety lock on any of these 3 personal lock applications. Equipment Isolation Lock Box Isolation Controlled Reliable Interrupt (single devices) (multiple isolation (CRI) devices) 16
Control of Hazardous Energy One Person / One Lock Principle – YOUR Role 4-Step Isolation Process Personal Lock Applications Single Devices Group Isolations (Use of Lock Box) Control Reliable Interrupt (CRI) Remove Your Lock Test Questions 17
Single Devices (Simulation staged in L&D workshop) Step 1 Isolation You may be required to A trained and competent Here the electrical disconnect switch is placed in the “Safe” apply your personal safety employee will perform the isolation (isolating the or “Off” position (open). lock directly to an isolation device. device in the designated Example: This electrical ‘safe’ isolated position). disconnect switch is used They first check the ID tag to isolate electrical energy to ensure this is the to equipment. correct isolation device. 18
Single Devices (Simulation staged in L&D workshop) Step 2 Locking You can now attach your personal safety lock to the isolation device. 19
Single Devices (Simulation staged in L&D workshop) Step 3 Dissipation The procedure indicates there is no stored energy and no requirements to control or restrain this equipment. 20
Single Devices (Simulation staged in L&D workshop) Step 4 Verification Tips of knife switch blades visible (painted red for demonstration purposes only) The competent person will demonstrate how to They test the isolation by test the isolation. Here they check inside the pushing the “Start” button. window to see that the knife blades are fully separated. With your lock on the isolation device, you are now safe to work. 21
Control of Hazardous Energy One Person / One Lock Principle – YOUR Role 4-Step Isolation Process Personal Lock Applications Individual Devices Group Isolations (Use of Lock Box) Control Reliable Interrupt (CRI) Remove Your Lock Test Questions 22
Group Isolations (Use of Lock Box) This is a lock box with many personal safety locks attached. This is used when there are multiple devices in the field which need to be locked out. 23
Lock Box Process Then a “Lock Verifier” repeats The Lock Affixer follows an In group isolations, a “ Lock the steps checking that all approved isolation procedure Affixer ” and a “ Lock Verifier ” isolations are complete. and isolates all devices... (who must be trained and competent), perform multiple isolation device lock outs using the 4 steps of isolation. Both the “Lock Affixer” and “Lock Verifier” complete an ELOR “ Equipment Lock Out Report ” documenting all steps and then sign and date it. 24
Lock Box Process (Simulation staged in L&D workshop) Once the isolation is complete, the … and the completed, signed and The key(s) are placed inside a ELOR and the key(s) to the multiple dated ELOR is also placed inside designated lock box … lock set are handed off to the person the lockbox so it is easily designated to be the “ LOCK BOX readable. CONTROLLER ”. This is always the first lock on the box and will be the last lock off. No one will be able to access the key(s) inside the box until a Lock Box Controller A best practice is to put removes this lock. The lock box is closed and the the Lock Box Controller Lock Box Controller places their lock in the ‘red zone’. personal safety lock on the box. 25
Lock Box Isolations – YOUR ROLE Key visible and Lock Box Controller’s identifiable inside Lock on Lock Box the Lock Box. Check the ELOR to Now you can ensure the isolation attach YOUR device for YOUR personal safety task is included lock to the box. Check that ELOR has been completed and signed by a Lock Affixer and Lock Verifier 26
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