arc flash managing your risk · flash, it is recommended that the ieee 1584 guide for performing...

ARC FLASH Managing Your Risk

ForwardArc flash risk assessment for workers who operate in proximity to, or on, energised electrical equipment, cables and overhead lines is an essential part of electrical safety management. We at Electrical Safety UK and J&K Ross take a responsible attitude in advocating that electrical work should be carried out with conductors dead and isolated wherever possible. However, we realise that there are tasks that require working either on, or in close proximity to, energised equipment. It should also be acknowledged that the process of de-energisation oft en requires exposure to the hazard through interactions such as switching, racking and testing of equipment.

This booklet has been prepared to take the reader through a step by step approach to the management of the arc flash hazard. This will always start with a dead working policy as a matter of principle and then through a range of risk control measures before considering Personal Protective Equipment (PPE) as a last resort to protect individuals should an arc flash occur.

www.arcflashprotection.co.uk

ARC Flash phenomenaexplainedAn arc flash is usually caused by inadvertent contact between an energised conductor such as a bus bar or wire with another conductor or an earthed surface.

When this occurs, the resulting short circuit current can vaporise the conductors and produce strong magnetic fields that blow the conducting objects apart. The resultant fault current ionises the air and creates a conducting plasma fireball with arc temperatures that can reach upwards of 20,000 degrees centigrade at its centre (4 times the surface temperature of the sun), which will immediately vaporise all known materials close to the arc immediately and the incident energy emitted may ignite the worker’s clothing and/or cause body burns to the worker even without igniting the clothing. Severe injury and even death can occur, not only to persons working on

the electrical equipment, but also to people located nearby. Arc flash injury can include external burns (i.e. severe burns to the skin), internal burns and intoxication from inhaling hot gasses and vaporised metal, hearing damage, eye damage and blindness from the ultraviolet light of the flash as well as many other devastating injuries. Depending on the severity of the arc flash, an explosive force known as an arc blast may also occur. This is due to the rapid expansion of air and vaporised materials, dispelling a force that may exceed 100 kiloPascal (kPa) and could cause the propulsion of molten metal, equipment parts and other debris at speeds of up to 300 metres per second (m/s).

MANAGING YOUR RISK | 02

Hazard and RiskThe term HAZARD means anything that has the potential to cause harm. In the case of arc flash the potential to cause harm will vary with the current that can flow in an arc, the amount of time that the arcing fault is sustained, the length of the gaps between the conductive parts, which are bridged by the arc, electrodes, the confinement around the arc, the chemical compositions of the conductors and the materials around the arc, and the distance of the worker from the arc. The term RISK is the chance (or likelihood), high or low, that someone might be harmed by the hazard.

Although the arc flash hazard potential may be high, control measures can be adopted to reduce both the hazard, and the associated risk, to as low as reasonably practicable. Some of these methodologies are explored within this booklet.

Arc Flash Risk Assessment

It is clear from the Management of Health and Safety at Work Regulations 1999 that there is an obligation on behalf of the Employer to assess level of risk involved in the workplace and the effectiveness of the precautions to be taken. For electrical work, this should include all the hazards of electricity, including the arc flash hazard, and not purely shock, as is often the case.

Risk assessments can take many forms but often assess RISK as the product of the SEVERITY of a hazardous event multiplied by the LIKELIHOOD of a hazardous event.

SEVERITY may range from very low where the arcing event is interrupted very quickly by well-designed protective devices to very high where arcing events persist or where worker distances are limited.

The severity of the thermal effect of an arc flash is defined by the amount of “incident energy” that a person, standing at a given distance away from the arc, could receive to the skin surface. The “incident energy” is the value calculated which defines the severity of the arc flash.

What the Law Expects

ARC FLASH Managing Your Risk

It is most commonly quantified in units of calories/centimetre2

(cal/cm2). As a frame of reference for incident energy, an exposure to heat flux of 1.2 cal/s.cm2 during 1 second, i.e exposure to 1.2 cal/cm2 can produce the onset of second degree burn to the skin. This value is used by many standards as the benchmark that defines protection against the thermal effects of arc flash and the threshold of a zone which is commonly known as the arc flash boundary. This is where the predicted incident energy falls to 1.2 cal/cm2.

LIKELIHOOD may range from negligible, for modern switchgear with appropriate working practices, to very likely for older switchgear in a poor environment, without maintenance records and lacking good operating practices. The likelihood of an incident is greatly enhanced by poor worker competence and ignorance of the hazards.

The European Agency for Safety and Health at Work defines RISK ASSESSMENT as the process of evaluating risks to worker’s safety and health from workplace hazards. It is a systematic examination of all aspects of work that considers:

a. what could cause injury or harm

b. whether the hazards could be eliminated and, if not,

c. what preventative or protective measures are, or should be, in place to control the risks

A fundamental safety principle, which is embodied in legislation, is to design out, eliminate or remove the hazard at its source. This leads to the conclusion that the majority of electrical tasks must be carried out with the equipment made dead. To work dead, the electricity supply must be isolated in such a way that it cannot be reconnected or inadvertently become live again for the duration of the work.

Electricity at Work Regulations & Guidance


MANAGING YOUR RISK | 04

Electrical Safety UK Ltd was responsible for creating the 4 Ps model for the management of the arc flash hazard which is shown in the following diagram,

This cycle matrix diagram illustrates how the important first step of predict is necessarily followed by prevent, protect and then finally publishing the risk assessment. This is described in some further detail below.

The 4P Model for ARCFlash Hazard Management

ARC FLASH Control Measures

Consequences of an Arc Flash include personal injury or fatality, prosecution, compensation claims, severe equipment damage, lost production and damage to brand

In predicting the severity of the thermal effect of an arc flash, it is recommended that the IEEE 1584 Guide for Performing Arc Flash Hazard Calculations 2002 is used, which is an auditable standard and widely accepted in the electrical engineering community. The calculations take into account distance to worker, conductor gap, voltage, prospective fault current and disconnection time. At present, the output relates to the amount of “incident energy” that a victim, standing at a given distance away from the arc, could receive to the skin surface. Future IEEE plans may incorporate other outputs into the guide such as blast pressure, noise and ultra violet radiation.

Computer modelling of the arc flash hazard in accordance with IEEE 1584 Guide for Performing Arc Flash Hazard Calculations 2002 requires: 1. A single line diagram, 2. A fault level study 3. A protection coordination study and 4. An arc flash study. The eff ort required for the arc flash study is less than 10% of the total and facilities owners who responsible for the management of electrical distribution systems should have items 1, 2 and 3 in place anyway

Predict


CONTROL MEASURES | 06

A fundamental safety principle, which is embodied in European/UK legislation, is to design out, eliminate or remove the hazard at it’s source. This leads to the conclusion that the majority of electrical tasks must be carried out with the equipment made dead. To work dead the electricity supply must be isolated in such a way that it cannot be reconnected, or inadvertently become live again, for the duration of the work. As a minimum, this will include the positive identification of all possible supply sources, the opening and locking of suitable isolation points by personal padlocks and for the proving dead at the point of work.

Where the arc flash hazard cannot be eliminated then suitable risk controls should be in place (preventative or protective measures).

The need for risk assessment is embodied in the Management of Health and Safety at Work Regulations 1999 (MH&SAW Regs) Risk control measures should look at preventing the incident rather than mitigating against it. The first line of defence therefore must be prevention.

The general principles of prevention as laid down in the MH&SAW Regs states that, “Where an employer implements any preventative measures, he shall do so on the basis of the principles of prevention”. These principles are shown below with guidance on how these principles should be applied.

The general principles of prevention given previously should be considered against a hierarchy of risk controls with priority as given below. The top of the list should always take priority with PPE as a last resort.

1. Elimination of the arc flash hazard2. Minimisation3. Information and Training4. Control the Risk – Maintenance 5. PPE

All these measures should be properly monitored and reviewed and this is particularly important when considering the lower order risk controls such as PPE.

Prevent


Principleof Prevention

How

Avoiding the Risk By dead working, Not energised = No electrical danger

Evaluate the risks which cannot be avoided

By arc flash assessment and predicting the level of harm and likelihood.

Combating the risks at source

By designing out the arc flash hazard or reducing it to an acceptable level

Adapting to the individual

By limiting exposure to the hazard

Adapting to technical progress /information

Take advantage of the advances in the evaluation of the hazard and mitigation and protection techniques in respect of arc flash

Replacing the dangerous by the non-dangerous

Replace vulnerable legacy switchgear and control panels, preferably with arc protected equipment and/or high levels of insulation and segregation of control and power circuits; using safer equipment (eg test equipment) and tools (eg insulated)

Developing a coherent overall prevention policy

Create a safe systems approach which is specific to structure environment, workforce & equipment issues, and developing risk based investment to reduce exposure to the hazard

Giving collective protective measures priority over individual protective measures

Create a safe place of work approach by screening live parts, and by good design and other measures that are not dependent on the individual’s choice

Giving appropriate instruction to employees

Create a safe person approach by documenting safe systems of work and training employees in safe work practices, highlight the arc flash hazard and provide information such as the labelling of switchgear.



Protect

Publish

Where the risk cannot be controlled by prevention or where there is a residual risk of injury then it may be necessary to consider mitigation to prevent injury to the worker. The requirement for and suitability of mitigation techniques must form an essential element of any risk assessment. Where protection against the thermal effects becomes necessary it must be emphasised that PPE does not prevent the accident happening in the first place.

Non-flame resistant clothing may ignite or melt at lower incident energy values and once ignited will continue to burn after the electrical arc has been extinguished. Burning material next to the flesh, even for very short durations, can result in serious third degree burns. This means that ordinary clothing can actually become a hazard and for this reason it should be considered within the risk assessment. Part of the risk assessment is to define the level of PPE that should be worn by the worker. However, the removal of the hazard is always the first choice.

Risk Assessments must be recorded and may also require that field marking of equipment may be required. Safe systems of work, safety rules and procedures will be necessary and trained to all affected persons.

Risk Assessments need to document the hazard severity and the risk control measures. Wherever possible these should be dynamically produced and task based. In other words, they should be available to the person carrying out the work who will reassess such things as environmental conditions and equipment state.


Hierarchy of Risk Controls Measures, Further InformationAs described previously, the following hierarchy of risk controls should be used when using risk control measures.

1. Elimination of the arc flash hazard

2. Minimisation

3. Information and Training

4. Control the Risk

5. PPE

The following describes some of the risk controls in some more details.

1. Elimination of the Arc Flash HazardThe best way to prevent injuries from occurring is to de-energize equipment before beginning work. A fundamental safety principle, which is embodied in U.K. legislation, is to design out, eliminate or remove the electrical hazard at its source. Designers of electrical systems should consider the need to eliminate live work as part of the overall system design.

Some of the elimination measures include the segregation of power and control circuits, safe control voltages and currents, finger safe shrouding of terminals and built in test points. Even then, the condition of the electrical equipment must be verified before work commences. It is not uncommon to have accidents occur on equipment that has been rendered dangerous, because electrical workers have not reinstated vital safety components such as door interlocks and insulating shielding after completion of work.



2. Reduction of the Arc Flash HazardSince incident energy is a function of short circuit current and the protective device clearing time, a reduction of the arc flash hazard may be achievable by evaluating the protective device sizes, settings and time current curves. In many cases where the incident energy is at dangerous levels, it is because the upstream protective device’s instantaneous adjustment is set too high and the device is operating in the long time delay region. Lowering the instantaneous setting may allow it to trip faster resulting in lower overall incident energy.

Caution should be exercised, however, because lowering a device’s trip setting can create a reliability issue by compromising selective coordination with other devices. This could cause multiple devices to trip during a short circuit and lead to a more widespread outage. The problem can be solved by changing the device settings only when live work is going to be performed. After the work is completed, the original settings can be restored to maintain existing selective coordination. These types of temporary setting changes are often referred to as “maintenance settings’.

Protection arrangements should be explored at design stage to minimise the effects of electrical flashover through the use of fast acting and/or current limiting devices. Other solutions may include retrofitting circuit breakers with instantaneous trip units. Another protection method that has been developed uses an optical sensor that detects the ultraviolet light emitted from an arc flash and causes the protective device to instantaneously trip. Equipment manufacturers are continually developing better methods to reduce or eliminate the arc flash hazard.

Incident energy levels are roughly proportional to the inverse square of the distance. This means that a small increase in distance between the live part to be worked upon and the torso of the worker can result in a significant decrease in incident energy. This is therefore, a valid reason to keep workers as far away as possible when undertaking work including inspections on or near to energised circuits. Enclosed switchgear which has a front cover removed and facing the worker acts to magnify the effects of the arc flash and will direct the energy outwards.


3. Information and TrainingMany times, electrical workers and even management do not fully understand the nature of the arc flash hazard and the seriousness of the injuries that can be sustained.

Experienced personnel are frequently involved in these types of accidents. Competent electrical workers should be trained in the decision-making process necessary to determine the degree and extent of the hazard, and the PPE and job planning necessary to perform the task safely.

A review of electrical procedures and safe systems of work can raise the profile and understanding of the hazard and associated control measures. Periodic awareness & refresher training, toolbox talks and specific training in the policy, rules and procedures are all important protocal.

Warning notices derived from arc flash studies will give information about the incident energy level, PPE and various approach boundaries. The Health and Safety (Safety Signs and Signals) Regulations 1996 is the relevant legislation on the provision and use of safety signs at work, the purpose of which is to encourage the standardisation of safety signs throughout the member states of the European Union so that safety signs, wherever they are seen, have the same meaning. If you are designing labels you ought to consider the requirements of this legislation as warning and prohibition signs will need to be in accordance with this directive.

A typical arc flash warning sign is shown below.



Arc Flash and Shock Hazard

2116mm

2.7 cal/cm²

Arc Flash Boundary

Arc-Rated Clothing, Minimum Arc Rating of 4 cal/cm² in Accordance with Site Standard.

11000 VAC Nominal Voltage

NO3 S/S

910mm

PPE Required

27/07/2016

Working DistanceIncident Energy

+44 (0)1709789585www.elecsafety.co.uk

Consultant: Electrical Safety (UK)Contract Reference: 693

Note: Additional Protection Required Inside Working Distance

WARNING

4. Control the RiskSafety rules and procedures with clear responsibilities are essential parts of a safe system of work. They should deal with properly assessing and authorising only competent people with systems for risk assessment. Where live working cannot be avoided, then the safe working systems should stipulate the use of the correct equipment and instruments. Electrical flashover accidents are very often caused by the operator dropping un-insulated tools or metal parts or by using incorrectly specified instruments. There should be a rule that no live work will be allowed on equipment that is damaged, even for the reasons of proving dead. There have been many incidents involving damaged cables where an approach has been made to prove dead when the damaged cable was in fact still live.

The main objective of an electrical maintenance programme is to keep electrical equipment in good working condition so that it can reliably and safely operate within its design criteria. This includes testing and maintenance of circuit breakers, protective relaying and associated equipment on a regular basis. Improper maintenance of equipment can contribute to the severity of an arc flash. When a protective device such as a circuit breaker or relay is not properly maintained, the likelihood of it operating slower (or not at all) increases, which would also increase the duration of exposure to the arc flash. Although not technically part of an arc flash calculation study, a proper equipment maintenance program is vital in making sure the protective devices will operate correctly.

5. PPEThe final risk control measure in the hierarchy of controls is PPE. You will notice that PPE is not mentioned in the principles of prevention given previously and PPE alone will not prevent the accident. It is seen as a last line of defence but where used properly has prevented injury to individuals and reports among utility companies have confirmed this. There has been research that shows that the hands, arms and face are the most commonly affected parts of the body in an arc flash incident so face and hand protection should also be considered.

Arc Rated PPE is surprisingly comfortable nowadays and can be worn as everyday workwear. Non Arc Rated clothing may ignite or melt at low incident energy values and once ignited will continue to burn after the electrical arc has been extinguished. Three seconds of burning material next to the flesh can result in serious full thickness burns. This means that ordinary clothing could actually become a hazard and for this reason it is well worth considering a policy of comfortable AR clothing.


About Electrical Safety UKNo matter where you are in the challenging process of developing or implementing an electrical safety management system, you can rely on ESUK to provide professional guidance, training and recommendations to help you become more compliant. Many asset owners are aware of the hazards associated with arc flash as a known risk as part of compliance with the Electricity at Work Regulations in the UK.

ESUK provide performance improvement solutions to many industries by combining expertise in engineering, operational rules & standards, training and simulation to improve both staff and equipment performance. We have more than three decades of experience working on many installations and hundreds of customers in over 20 countries spanning the globe.

ESUK are proud of the tailored approach we adopt for our client’s needs, and strive to devise an agreed process and solution which satisfies all of our client’s specific requirements. We don’t believe it adequate to stop at only identifying hazards but focus on supporting clients to develop feasible solutions to reduce risks and ensure the safety of their staff.

ESUK offer a full arc flash risk assessment service with highly experienced engineers, helping clients better understand the harmonisation between the US and European standards that apply with arc flash hazards. We also provide accredited & CPD approved Arc Flash Awareness training, both on your site or at our Rotherham training centre. We offer periodic reviews for ongoing updates to a study as well as the necessary EasyPower ™ software for engineers to carry out the work inhouse.

It is also necessary to consider mitigation measures with respect to the high arc flash incidence levels and also considering hazards imposed by the installation and location itself. Mitigation is often achieved through protection review and enhancement & ESUK can carry out a risk assessment for the higher hazard locations.

Services provided by ESUK:In order to complete the necessary works, ESUK provide the following services

• DetailedSiteSurvey,Data Gathering & Collation• DistributionSystemSoftware Modelling• FaultlevelAnalysis• ArcFlashCalculations

• RiskAssessment• RiskMitigationMeasures• Labelling• PPEGuidance• ProjectManagement• CDM




If they do, that’s great; here at JK Ross , we can help you to cover any residual risk that is required by PPE. If the answer is no, or you’re not sure, then Electrical Safety UK can help you to identify and calculate the arc flash hazard and to provide risk assessment which will fit into your existing safety rules and procedures for electrical work.

We can help you to review existing rules and procedures to ensure that the arc flash hazard is adequately addressed and risk control measures are compliant with the present legislation.

Do your Risk Assessments adequately address the Arc Flash Hazard for Electrical Workers?

IEC 61482-2: Protective clothing against the thermal hazards of an Electric Arc

This standard specifies requirements applicable to fabrics (materials) and garments for protective clothing worn by electrical workers against the thermal hazards that may be presented during an electrical arc flash over (note it does not cover items which are designed to protect against head, face, hands or feet).

The requirements do not address the other hazards that may be present during an electrical arc flash, such as noise, UV emissions, pressure blast, ballistic damage (e.g. shrapnel) or toxic fumes / gases / vapours.

It also does not address the hazards presented by electric shock (electrocution).


CONTROL MEASURES / PPE & CLOTHING | 16

Arc in a box testing (EN IEC 61482-1-2)

This test simulates exposure to low voltage service or maintenance situations - switching boxes, distribution sub stations, cable distribution boxes - as examples of installations that are contained within a (usually steel) box, which would more often than not be located at worker chest height.

This test is performed on the fabric (or layers of fabric) as well as a finished garment

There are two performance classes defined as

Class 1 – Short Circuit Current 4KA for 0.5 second duration

Class 2 – Short Circuit Current 7KA for 0.5 second duration

Many factors will affect the severity of an electric arc flash and these are dealt with elsewhere in this booklet; suffice to say, it is important to match the PPE worn to the severity of the arc.

In order to comply with IEC 61482-2 (which is a garment standard, not a test method) manufacturers must use one (or both) of the following test methods for their fabrics and garments:

• ArcinaboxtestingaccordingtoENIEC61482-1-2

• OpenarctestingaccordingtoIEC61482-1-1

Open arc testing (IEC 61482-1-1)

This test exposes fabric samples (singly or in layers) set symmetrically around an arc which spreads out evenly through 360 degrees.

This test determines the Arc Thermal Performance Value (ATPV) which would typically be expressed in calories per centimetre squared ( cal/cm2).

Using the results of ones arc flash study / risk assessment, usually also expressed in cal/cm2, one is able to carefully select PPE which offer sufficient protection.

At the time of going to press, work is at an advanced stage to add a new criteria known as the ELIM (Incident Energy Limit).

Typically you will find that our garments are certified using both of the above methods.

ARC FLASH PPE & Clothing

Eye & face protection The heat energy which results from an electrical arc flash comprises of both convective and radiant heat (the latter being electromagnetic in nature)

Additional requirements need to be considered as the electromagnetic radiation emitted by an arc flash can, in part, pass through a face shield or hood window.

This is an important consideration as visible light is also electromagnetic radiation and the wearer needs to be able to see through a face shield or window. It is essential that whilst the face shield or window must withstand the heat and the electromagnetic radiation, in doing so protecting the eyes & skin behind, it must, at the same time, allow the wearer to look through it without stress to the eyes.

Therefore in Europe all eye & face protectors, including those designed to protect against electrical arc flash, must be tested to EN 166 for optical and mechanical properties. Furthermore eye & face protectors protecting against an arc flash shall filter a “well defined” proportion of UV radiation generated by an arc flash. EN 170 describes the test methods

with respect to such UV protection.

Finally, complete eye & face protective devices need to be tested to ascertain their “resistance” to electrical arc flashes. in efffect the test principles are similar to those already described before:

GS-ET-29 is an Arc-In-Box testing very similar to IEC 61482-1-2 but with a sensor assembled test head.

ASTM F2178 is the Open-Arc pendant to IEC 61482-1-1, again with a sensor assembled test head.

Where a device also consists of textile components (e.g. chin protector, shroud, hood, etc.) the fabric must fulfil the fabric requirements as per IEC 61482-2.


PPE & CLOTHING | 18

Arc Flash Head &Face Protection

ArcBan® Three Layer 40cal/cm2 HoodThis unit is based on an adjustable industrial safety helmet and combines head protection and face protection with an all encompassing fabric shroud made with three layers of DuPontTM Nomex®.

Fabric Assembly complies as follows:

Helmet ANSI z89.1 Type 2 Class EVisor EN166 7.2.7 and tested using IEC 61482.

Face Protection

ArcBan head protection aft er being subjected to a 40cal Arc Flash ( 10KA, 1000V, 1.0 sec)

1. Visible external charring and outer fabric delamination.

However - Internal fabric / inside of visor & helmet remain as they were, when first donned. Remember to always wear your Hood and other specified PPE

1

1Contact J&K Ross if you wish to see this headtop for yourself, or show your team.

ArcBan® Paulson Arc Shield with Fabric Chinguard

1. Can be worn on either a helmet mounted carrier ARC/CARRIER/HEL or on a standalone browguard ARC/HG7- HBLACK.2. For 3600 protection we suggest wearing this over an appropriate hood or balaclava.3. Chinseal made with DuPontTM Nomex®4. Faceshield made from a patented blend of multiple materials such as visible dyes, laser absorbing compounds, oils and lubricants embedded into cellulose propionate matrix.

5. Fabric chinseal not only gives lower face and neck protection but also gives a fantastic range of head movement. This includes excellent visibility while looking down, which can be more diff icult with the solid style chinguards. 6. Chinseal has stud fastening allowing for removal for washing and replacement. Please note due to the fabric being inherently flame and arc flash resistant it’s protective qualities won’t wash out. 7. The fabric assembly of the chinguard has ben tested using IEC 61482-1-1 and achieves 55.1 cal/cm2. 8. Integrated side protection from large curved design. curved design.

has ben tested using IEC 61482-1-1 and achieves 55.1 cal/cm 8. Integrated side protection from large curved design.

5

8

6

1

2

4

3

7

*sub

ject

to g

arm

ents

was

h an

d ca

re in

stru

ctio

ns b

eing

follo

wed

.



PPE & CLOTHING | 20

Arc Flash HandProtection

Liner gloves designed to give protection from the thermal hazards of an electrical arc flash while being worn under other hand protection such as electrician’s gauntlets.

The fabric used is A+ Panther® HD Fabric, consisting of 79% DuPontTM Nomex®, 5% DuPontTM Kevlar®, 14% FR Viscose, 2% P-140 Antistatic Fibre.

Fabric assembly tested using IEC 61482-1-1:2009 achieving 8.7 cal/cm2 and IEC 61482-1-2:2007 Class 1

ARC PROTECTIVE Glove made from DuPontTM Nomex® fibres giving protection against the thermal hazards of an electric arc and also against accidental contact with heat and flame.

The extension cuff is made from DuPontTM Nomex® 220 grm Comfort fabric, the glove “hand” is made from DuPontTM Nomex® and has leather grip pads attached to palm, thumb the fingers.

This gauntlet is purpose designed to provide the optimum combination of protection and dexterity.

It is constructed from neoprene coated DuPontTM Kevlar® (back) with a supple leather front part to hand fingers and cuff , the long cuff aff ords protection to the wrist.

Also provides the following ATPV 32.8 cal/cm2 on the palm and 45 cal/cm2 on the back of hand.

ArcBan® A+ Panther® HD Liner Gloves

ArcBan® Nomex

ArcBan® Neoprene/Leather Gauntlet


A+ Panther® HD Poloshirt& ArcBan® e+Arc® Trousers

Poloshirt

1. Contrasting red tipping and stitching.2. Covered plackett in conformance with the standards.3. A+ Panther® HD Fabric. Made with DuPontTM Nomex®, DuPontTM Kevlar®, and other fibers.4. Long sleeves with knitted cuff s.

Trousers

7. Two front slash pockets.8. e+Arc® Fabric. Made with DuPontTM Nomex® Comfort, DuPontTM Kevlar® and other fibers.9. Two rear patch pockets.10. External, side-opening, kneepad pockets.11. Cargo Pocket with flap and velcro closure on left and right legs.

1

2

3

4

5

7

9

6

8


PPE & CLOTHING | 22

ArcBan® Multi-NormCoverall

1. High collar for added neck protection With double stud fastening.2. Bands of reflective tape over shoulders, upper sleeves, around body and lower legs conforming to ISO 20471.3. Two radio loops on the upper chest.4. Covered 2 way main zip (non-metallic).5. Slanted hip pockets, with access to trousers.6. Two breast patch pockets.

7. Inherently flame and Arc resistant properties that don’t wash out.* 8. Action pleated back and elasticated waist.9. Elasticated cuff s. 10. Patch pocket, with flap and fastening on right rear hip.11. Internal bottom-opening kneepad pockets.

11

9

4

2

1

3

6

7

10

85

Subject to garments wash and care instructions being followed.

ISO 20471

ArcBan® 40 cal/cm2 Kit


1. High collar for added neck protection.2. Three Layer Hood made with DuPontTM Nomex® (see over).3. Bands of reflective tape over shoulders, upper sleeves, lower edge of jacket and lower legs or bib & brace for enhanced visibility.4. Radio Loops on left & right chest.5. Concealed front zip.6. Knitted stretch cuff s.7. 40 cal/cm2 Gauntlets (see over).8. Patch pockets, with flap and fastening at waist level.

9. Bib and brace style trousers with covered press stud fastening at side, Slide release buckle fastenings for braces.10. Dual Layer Construction. Outer layer - e+Arc® Woven Fabric. Made with DuPontTM Nomex® Comfort, DuPontTM Kevlar® and other fibers. Inner Layer - A+ Panther® HD Knitted Fabric. Made with DuPontTM Nomex®, DuPontTM Kevlar® and other fibers.11. Non-metallic zip fastenings to ankles With Velcro fastener.12. Radio Loops on left & right chest.13. Inside kneepad pockets.

1

2

5

8

6

7 9

10

12

11

4

3


PPE & CLOTHING | 24

ArcBan® E+ Arc CoverallArcBan® E+ Arc Coverall

1. High collar for added neck protection.2. Internal chest pocket.3. Bands of reflective tape over shoulders, upper sleeves & lower legs for enhanced visibility.4. Velcro patch for attaching name or logo badges.5. Action pleated back and elasticated waist.6. Slanted hip pockets. 7. Velcro fastening cuff s.

8. Patch pockets, with flap and fastening on left and right rear hips.9. Cargo pockets on left and right hip.10. Covered main zip (non-metallic).11. External bottom-opening kneepad pockets.12. e+Arc® Fabric. Made with DuPontTM Nomex® Comfort, DuPontTM Kevlar® and other fibers.13. Non-metallic zip fastenings to ankles.

1

2

34

5

8

7

6

9

10

1112

13


Arc Flash ProtectiveClothing Layering Method

BENEFITS OF LAYERINGIn order to maximise comfort and protection levels, it is found to be advantageous to utilise several light layers of protective clothing as opposed to one heavy layer. As you can see from above the total level of protection achieved when wearing two (220 grm/m2) layers is significantly higher than the sum of the parts. In other words, if we take the area of the body where the coverall (9.8 cal/cm2) lays over the trousers (also 9.8 cal/cm2) we might expect to achieve 19.6 cal/cm2, however as you can see the results from tests show us that 43.7 cal/cm2 is achieved. To obtain this level of protection with one layer would entail wearing a very stiff , heavy and uncomfortable garment. Such a strategy also allows for lower levels of protection to be worn where an arc flash study shows this to be safe and by the simple expedient of donning a coverall over the trousers and shirt, one is protected from higher levels of incident energy. For those of you who have to follow the HRC method as laid down in NFPA70E then the above methodology allows you to cover HRC 1 and HRC 2 with the single layer and HRC 3 and HRC 4 with the two layer system.

Clothing Layering MethodClothing Layering MethodUnder LayerATPV/Class

A+ Panther® HDPoloshirt= 8.7 cal/cm2/Class 1 (4kA)

e+ Arc®Trousers= 9.8 cal/cm2/Class 1 (4kA)

Over LayerATPV/Class

e+ Arc®Coverall

= 9.8 cal/cm2/Class 1 (4kA)

e+ Arc®Coverall

= 9.8 cal/cm2/Class 1 (4kA)

TotalATPV/Class

Top Area= 47.1 cal/cm2/

Class 2 (7kA)

Lower Area= 43.7 cal/cm2/

Class 2 (7kA)


PPE & CLOTHING | 26

1

2

4

3

3

Detachable, Adjustable Hood. (Available Seperately)Outer Fabric - 2 Layer Alexandra® Fabric

1. Turtle Neck Style Collar with Internal Spacer Collar2. Two Large Internal Pockets with Zips under Storm Flap. (Suitable for Switching Book)3. Segmented Hi-Viz Reflective Tape On Shoulders, with Solid Reflective Tape Around Sleeves and Torso 4. Two Large Jetted Angled Pockets with Fleece Lining 4. Heavy Duty 2 Way Plastic Zip Opening with Velcro Double Storm Flap5. Knitted Internal Protal® Cuff with Adjustable External Velcro Fastener

5

FK25JKR Anti-Static ArcBan Jacket

Electrical Safety (UK) Limited Fusion@Magna,

Magna Way, RotherhamS60 1FE

T: 0800 652 1124E: [email protected]

www.elecsafety.co.uk

J & K Ross LtdSafety House, Kerfoot Street, Warrington

WA2 8NUT: +44 (0)1925 645 645E: [email protected]


arc flash managing your risk · flash, it is recommended that the ieee 1584 guide for performing...

Documents