ASTM F2522-05(2011)
(Test Method)Standard Test Method for Determining the Protective Performance of a Shield Attached on Live Line Tools or on Racking Rods for Electric Arc Hazards
Standard Test Method for Determining the Protective Performance of a Shield Attached on Live Line Tools or on Racking Rods for Electric Arc Hazards
SCOPE
1.1 This test method is used to determine the heat attenuation factor (HAF), the effective heat attenuation factor (EHAF), and the shields mechanical strength (SMS) of a shield attached on live line tools or racking rods intended for protection of workers exposed to electric arcs.
1.2 The materials used in this test method of worker protection are in the form of a shield attached on live line tools or on the racking rods.
1.3 The protective shield described in this test method shall be transparent and shall be easily attached and removed from live line tools or from racking rods.
1.4 The protective shield described in this test method has 24-in. (0.61-m) diameter and can be used for most applications, however for special cases, the shield can have different sizes to suit the protective requirements of the application.
1.5 This standard shall be used to measure and describe the properties of materials, products, or assemblies in response to incident energies (thermal-convective, and radiant and pressure wave) generated by an electric arc under controlled laboratory conditions and does not purport to predict damage from light, resultant pressure impact other than the pressure and thermal aspects measured.
1.6 UnitsThe values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.7 This standard shall not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire assessment, which takes into account all of the factors, which are pertinent to an assessment of the fire hazard of a particular end use.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautions, see Section .
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Designation: F2522 − 05(Reapproved 2011)
Standard Test Method for
Determining the Protective Performance of a Shield
Attached on Live Line Tools or on Racking Rods for Electric
1
Arc Hazards
This standard is issued under the fixed designation F2522; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.8 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method is used to determine the heat attenua-
responsibility of the user of this standard to establish appro-
tionfactor(HAF),theeffectiveheatattenuationfactor(EHAF),
priate safety and health practices and determine the applica-
and the shields mechanical strength (SMS) of a shield attached
bility of regulatory limitations prior to use. For specific
on live line tools or racking rods intended for protection of
precautions, see Section 7.
workers exposed to electric arcs.
1.2 The materials used in this test method of worker
2. Referenced Documents
protection are in the form of a shield attached on live line tools
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2.1 ASTM Standards:
or on the racking rods.
D4391 Terminology Relating to The Burning Behavior of
1.3 The protective shield described in this test method shall
Textiles
be transparent and shall be easily attached and removed from
F1959/F1959M TestMethodforDeterminingtheArcRating
live line tools or from racking rods.
of Materials for Clothing
1.4 The protective shield described in this test method has
3. Terminology
24-in.(0.61-m)diameterandcanbeusedformostapplications,
however for special cases, the shield can have different sizes to 3.1 Definitions:
suit the protective requirements of the application.
3.1.1 arc, n—conductive path in air for the electric current
caused by ionization of air between two electrodes.
1.5 This standard shall be used to measure and describe the
properties of materials, products, or assemblies in response to 3.1.2 arc duration, n—time duration of the arc, s.
incidentenergies(thermal-convective,andradiantandpressure
3.1.3 arc energy, vi dt, n—sum of the instantaneous arc
wave) generated by an electric arc under controlled laboratory
voltage values multiplied by the instantaneous arc current
conditions and does not purport to predict damage from light,
values multiplied by the incremental time values during the
resultant pressure impact other than the pressure and thermal
arc, J.
aspects measured.
3.1.4 arc gap, n—distance between the arc electrodes.
1.6 The values stated in inch-pound units are to be regarded
3.1.5 arc voltage, n—voltage across the gap caused by the
as standard. The values given in parentheses are mathematical
current flowing through the resistance created by the arc gap,
conversions to SI units that are provided for information only
V. See also Terminology D4391.
and are not considered standard.
3.1.6 asymmetrical arc current, n—the total arc current
1.7 This standard shall not be used to describe or appraise
produced during closure; it includes a direct component and a
the fire hazard or fire risk of materials, products, or assemblies
symmetrical component, A.
under actual fire conditions. However, results of this test may
3.1.7 blowout, n—the extinguishing of the arc caused by a
be used as elements of a fire assessment, which takes into
magnetic field.
account all of the factors, which are pertinent to an assessment
3.1.8 closure, n—point on supply current wave form where
of the fire hazard of a particular end use.
arc is initiated.
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This test method is under the jurisdiction of ASTM Committee F18 on
Electrical Protective Equipment for Workers and is the direct responsibility of
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Subcommittee F18.35 on Tools and Equipment. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2011. Published September 2011. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2005 as F2522-05. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F2522-05R11. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F2522 − 05 (2011)
3.1.9 delta peak temperature, n—difference between the EHAF test at the probable location of the worker’s hand, head,
maximum temperature and the initial temperature of the sensor side of the face, chest, and legs when exposed to the heat
during the test, °C. energy from a controlled electric arc. The S
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