ASTM F2522-12
(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
SIGNIFICANCE AND USE
5.1 This test method is intended for determining the heat attenuation factor (HAF) of a shield material and the effective heat attenuation factor (EHAF) at the location of the worker. This can be obtained by measuring the reduction of the arc incident energy levels caused by a shield attached on a live line tool (hot stick) or on a racking rod and designed for protection for workers exposed to electric arcs. The shield mechanical strength (SMS) can be obtained from visual observations of the high speed video recordings of each shot during HAF tests.
5.1.1 Because of the variability of the arc exposure, different heat transmission values and pressure may result for individual sensors. The results of each sensor are evaluated in accordance with Section 12.
5.2 This test method maintains the shield and the heat sensors in a static, vertical position and does not involve movement except that resulting from the exposure.
5.3 This test method specifies a standard set of exposure conditions. Different exposure conditions may produce different results.Note 1—In addition to the standard set of exposure conditions, other conditions representative of the expected hazard may be used and shall be reported should this data be cited.
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 The 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.
1.8 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 7.
General Information
Relations
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F2522 − 12
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 2
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,
3.1 Definitions:
however for special cases, the shield can have different sizes to
3.1.1 arc, n—conductive path in air for the electric current
suit the protective requirements of the application.
caused by ionization of air between two electrodes.
1.5 This standard shall be used to measure and describe the
3.1.2 arc duration, n—time duration of the arc, s.
properties of materials, products, or assemblies in response to
3.1.3 arc energy, vi dt, n—sum of the instantaneous arc
incidentenergies(thermal-convective,andradiantandpressure
voltage values multiplied by the instantaneous arc current
wave) generated by an electric arc under controlled laboratory
values multiplied by the incremental time values during the
conditions and does not purport to predict damage from light,
arc, J.
resultant pressure impact other than the pressure and thermal
aspects measured.
3.1.4 arc gap, n—distance between the arc electrodes, cm
[in.].
1.6 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
3.1.5 arc voltage, n—voltage across the gap caused by the
conversions to SI units that are provided for information only current flowing through the resistance created by the arc gap,
and are not considered standard. V. See also Terminology D4391.
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
be used as elements of a fire assessment, which takes into
3.1.7 blowout, n—the extinguishing of the arc caused by a
account all of the factors, which are pertinent to an assessment
magnetic field.
of the fire hazard of a particular end use.
3.1.8 closure, n—point on supply current wave form where
arc is initiated.
1
This test method is under the jurisdiction of ASTM Committee F18 on
Electrical Protective Equipment for Workers and is the direct responsibility of
2
Subcommittee F18.35 on Tools & Equipment. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2012. Published November 2012. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2011 as F2522-05(2011). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/F2522-12. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F2522 − 12
3.1.9 effective heat attenuation (EHAF)/cone of protection shrapnel, not break or ignite, not to move from its attachment,
(COP) factor, n—the percentage of the incident heat energy and not to bend more then 20 degrees.
that is attenuated by the shield at the location of the worker.
4.2 During HAF and EHAF tests, the
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F2522 − 05 (Reapproved 2011) F2522 − 12
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
1.1 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 The 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.
1.8 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 7.
2. Referenced Documents
2
2.1 ASTM Standards:
D4391 Terminology Relating to The Burning Behavior of Textiles
F1959/F1959M Test Method for Determining the Arc Rating of Materials for Clothing
3. Terminology
3.1 Definitions:
3.1.1 arc, n—conductive path in air for the electric current caused by ionization of air between two electrodes.
3.1.2 arc duration, n—time duration of the arc, s.
1
This test method is under the jurisdiction of ASTM Committee F18 on Electrical Protective Equipment for Workers and is the direct responsibility of Subcommittee
F18.35 on Tools and& Equipment.
Current edition approved Sept. 1, 2011Oct. 1, 2012. Published September 2011November 2012. Originally approved in 2005. Last previous edition approved in 20052011
as F2522F2522-05(2011).-05. DOI: 10.1520/F2522-05R11.10.1520/F2522-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F2522 − 12
3.1.3 arc energy, vi dt, n—sum of the instantaneous arc voltage values multiplied by the instantaneous arc current values
multiplied by the incremental time values during the arc, J.
3.1.4 arc gap, n—distance between the arc electrodes.electrodes, cm [in.].
3.1.5 arc voltage, n—voltage across the gap caused by the current flowing through the resistance created by the arc gap, V. See
also Terminology D4391.
3.1.6 asymmetrical arc current, n—the total arc current produced during closure; it includes a direct component and a
symmetrical component, A.
3.1.7 blowout, n—the extinguishing of the arc caused by a magn
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.