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GB 4793.2-2008: Safety requirements for electrical equipment for measurement, control, and laboratory use -- Part 2: Particular requirements for hand-held and hand-manipulated current sensors for electrical test and measurement
Status: Valid GB 4793.2: Evolution and historical versions
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Safety requirements for electrical equipment for measurement, control, and laboratory use -- Part 2: Particular requirements for hand-held and hand-manipulated current sensors for electrical test and measurement
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GB 4793.2-2008
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| GB 4793.2-2001 | English | 519 |
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Safety requirements for electrical equipment for measurement, control and laboratory use Particular requirements for hand-held current clamp for electrical measurement and test
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GB 4793.2-2001
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Basic data | Standard ID | GB 4793.2-2008 (GB4793.2-2008) | | Description (Translated English) | Safety requirements for electrical equipment for measurement, control, and laboratory use -- Part 2: Particular requirements for hand-held and hand-manipulated current sensors for electrical test and measurement | | Sector / Industry | National Standard | | Classification of Chinese Standard | N09 | | Classification of International Standard | 19.080 | | Word Count Estimation | 14,148 | | Date of Issue | 2008-08-30 | | Date of Implementation | 2009-09-01 | | Older Standard (superseded by this standard) | GB 4793.2-2001 | | Quoted Standard | GB 4793.1; GB 4793.5 | | Adopted Standard | IEC 61010-2-032-2002, IDT | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 14 of 2008 (total 127) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard relates to handheld and handheld current sensors. Such current sensors are used to test the circuit without removing the case of the current path of the current measurement. Current sensor may be independent, they can be other attachment devices. Current sensor before or after measuring and testing, requires manual operation, but not necessarily required during the measurement and test hand. A type current sensor: should be able to live in a non- insulated conductors for hazardous clamp or removed. A-type current sensor handheld or handheld test conductor section should provide protection against electric shock in Ji -bit mode, and between the wires should be provided to prevent a short circuit between the bus bar protection. B-type current sensor: it should be provided in the membership of the state bit to prevent the wire or between a short circuit between the bus bar protection, hand-held or hand- | GB 4793.2-2008: Safety requirements for electrical equipment for measurement, control, and laboratory use -- Part 2: Particular requirements for hand-held and hand-manipulated current sensors for electrical test and measurement
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Safety requirements for electrical equipment for measurement, control, and laboratory use.Part 2. Particular requirements for hand-held and hand-manipulated cruuent sensors for electrical test and measurement
ICS 19.080
N09
National Standards of People's Republic of China
GB 4793.2-2008/IEC 61010-2-032.2002
Replacing GB 4793.2-2001
Measurement, control and laboratory use electrical equipment
Safety requirements - Part 2. Electrical measurements and tests
Particular requirements for handheld communicator and current sensors
(IEC 61010-2-032.2002, IDT)
Published 2008-08-30
2009-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Table of Contents
Preface Ⅰ
And a range of object 1
2 Normative References 1
Terms and definitions 1 3
4 Test 2
5 Marking and documentation 3
4 6 against electric shock
7 against mechanical risk 8
Mechanical shock and impact resistance 8 8
9 to prevent the spread of flame 8
The temperature limit device 10 and heat 8
11 dangerous fluid-8
12 radiation (including laser light source), an acoustic and ultrasonic pressure 8
13 pairs of released gases, explosion and implosion protection 9
14 components 9
15 using a protective interlock 9
16 test and measurement equipment 9
Appendix 10
GB 4793.2-2008/IEC 61010-2-032.2002
Foreword
All technical contents of this section is mandatory.
GB 4793 "measurement, control and laboratory safety requirements for electrical equipment" is currently divided into seven parts.
--- Part 1. General requirements (IEC 61010-1);
--- Part 2. Particular electrical measurement and test requirements held and hand operated current sensors (IEC 61010-2-032);
--- Part 3. laboratory mixing and stirring equipment Particular requirements (IEC 61010-2-051);
--- Part 4. Particular requirements for laboratory use (IEC 61010-2-041) Autoclave treatment of medical material;
--- Part 5. Safety electrical measurement and test requirements of the handheld probe assembly (IEC 61010-031);
--- Part 6. Laboratory Particular requirements (IEC 61010-2-010) heating of materials;
--- part 7. Particular requirements for laboratory centrifuges (IEC 61010-2-020).
Note. The name of the section will change with changes in IEC standard names.
This is Part 2 GB 4793's.
This section is equivalent to using 61010-2-032 IEC .2002 "2-032 portion of measurement, control and laboratory safety requirements for electrical equipment for
Point. Electrical measurement and test operations held and hand the special requirements of the current sensor "(in English). Its technical content, text structure and expression
Form and IEC 61010-2-032.2002 exactly the same.
For ease of use, the present editorial changes made the following section.
"." --- replaced by a decimal decimal comma ",";
--- omitted IEC 61010-2-032.2002 Contents Introduction and "Appendix H (informative) defined Index";
--- For IEC 61010-2-032.2002 references other international standards have been adopted as identical or modified our standards, this
Partially replaced with corresponding international standards of national standards or industry standards; the rest No equivalent or modify adopted as our standard
Quasi-international standards, are directly referenced in this section.
This section is GB 4793.2-2001 "measurement, control and laboratory safety for electrical measurement and test of electrical equipment with hand-held electric
Specific requirements tongs "(IEC 61010-2-032.1994, IDT) revision.
This section must be combined GB 4793.1 "measurement, control and laboratory safety requirements for electrical equipment with Part 1. General Requirements"
use together. Stated in this section "applicable" section, showing the corresponding GB article suitable for use in the present section 4793.1; this standard states "instead of"
Or "modify" part, this strip section to indicate prevail; in this section indicate the "increase" portion, indicated that in addition to comply with the GB 4793.1
Should article, must also comply with the section bar increased. In order to distinguish the bar GB 4793.1, this part of the increase in the number of bars
101 starts, for example, 3.101.
This portion of the major changes are more GB 4793.2-2001. Article many modifications made in the text, with the structure of the standard
GB 4793.1-2007 were adjusted for a number of test methods were more detailed explanation.
--- increased Type A, B, C define current transducer;
--- increase of anti-shock test method section increases protection against electric shock and short-circuiting prevention of structural requirements;
--- increases the dynamic test methods in mechanical shock resistance and impact requirements.
Appendix D of this section is normative.
This section was proposed by China Machinery Industry Federation.
This part of the jurisdiction of the National measurement, control and electrical equipment Safety Laboratory Standardization Technical Committee (SAC/TC338).
This section was drafted. of Instrumentation Comprehensive Economic Institute of Technology.
The main drafters of this section. Zheng Xu, Mei Ke, Liu Xiaojing, Wang Linkun, Ouyang Jinsong, when FANG Xiao, Wang Jianhua, Pan Changqing, Zhang Guiling.
This section replaces the following previously issued as follows.
--- GB 4793.2-2001.
GB 4793.2-2008/IEC 61010-2-032.2002
Measurement, control and laboratory use electrical equipment
Safety requirements - Part 2. Electrical measurements and tests
Particular requirements for handheld communicator and current sensors
1 Scope and Purpose
Except as follows, GB 4793.1 Chapter 1 apply.
1.1 Scope
instead.
GB 4793 apply to this portion of the hand-held communicator and a current sensor. Such current sensors are not used to electrically disconnect circuit circulation
In the case of the measured current path. The current sensor may be independent, or may be of other accessory devices.
The current sensor before or after measuring and testing, manual operation is required, but not necessarily required, and during the measurement the test handset.
A current sensor. should be interposed in the removal or uninsulated hazardous live conductors. A current sensor of the hand held or
Operating section should provide protection against electric shock of the conductor under test, in the clamping state, it should be provided to prevent a short circuit between the wires and the busbar
protection.
B current sensor. should provide protection against a short circuit between the wires or busbars in the clamping state, the hand-held or hand operating portion
Points do not provide protection against electric shock. To avoid the risk of electric shock during use or movement sensor for measuring a current uninterruptible power hazardous live conductors, to be put
For additional protective measures.
Note. B-type current sensor comprises a flexible current sensor.
C current sensor. in the clamping state, do not provide protection against a short circuit between the wires or bus bars. Only in uninsulated
When hazardous live conductors off, or removed in order to use C-type current sensor.
NOTE. C type current sensors include some split core transmitter.
2 Normative references
Terms of the following documents constitute provisions of this section by reference in this section 4793 of the GB . For dated references,
All subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encouraged to reach an agreement under this section
Whether the parties to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
GB 4793.1 measurement, control and laboratory use Part 1 safety requirements for electrical equipment. General requirements (GB 4793.1-
2007, IEC 61010-1.2001, IDT)
Except as follows, GB 4793.1 Chapter 2 apply.
increase.
GB 4793.5 measurement, control, and laboratory safety requirements for electrical equipment with Part 5. Electrical handheld test and measurement probes
Safety requirements for the components (GB 4793.5-2008, IEC 61010-2-031.2002, IDT)
3 Terms and Definitions
Except as follows, GB 4793.1 Chapter 3 are applicable.
increase.
GB 4793.2-2008/IEC 61010-2-032.2002
3.101 current sensor and its components (see FIG. 101)
legend.
1 --- jaw;
2 --- tail clamp;
3 --- pliers.
FIG example of the current sensor 101 and its parts
3.101.1
A method for the circuit without cutting the current path, measurement, detection or injection current, or a current waveform indicating the portable device
Or handheld device.
Note 1. a current sensor, also referred to in some current clamp and current probes.
NOTE 2. Some are designed to be portable for fixing the current sensor may also be installed.
3.101.2
Qianhouraoju
A current sensor around the conductor under test parts.
3.101.3
Open conductor can be placed in the clamp current clamp portion.
4 Test
Except as follows, GB 4793.1 Chapter 4 are applicable.
4.4.2.7 Output
instead.
GB 4793.2-2008/IEC 61010-2-032.2002
Each output should be open or short (less favorable that), once applied a.
5 Marking and documentation
Except as follows, GB 4793.1 Chapter 5 are applicable.
5.1.2 logo
increase.
After b) Note the following new entries aa).
aa) the current sensor should be marked with the following.
1) If the current sensor is designed to be used only with a specific type of device, the identification device should be in current sensing
The file or its affiliated clearly indicated. If the information is given only in the file, the current sensor should be marked
A symbol table 14;
2) A current sensor should be marked with the symbol in Table 1, 102;
3) B-type and C-type current sensor should be reference numeral 101 in Table 1 superscript.
If applicable (see 5.1.5.101), related symbols (14,101 or 102) in the vicinity of the measurement shall be marked category tags.
Article added.
Table 1 Symbol
Add the following two new symbol in Table 1.
Standards No. Symbol
Can not be installed from the hazardous live conductors or
Disassembly
Conductor mounting allows charging from danger and
Disassembly
5.1.5.101 clamp voltage and current rating
The current sensor should be given to the rated voltage of numerals at the time of measuring the non-insulated conductor. Unless both for AC (rms) also applies
A DC voltage or property shall mark (a.c., d.c. Etc.). It should also be in the vicinity of the rated voltage of the circuit be labeled by
Add "CATⅡ", "CATⅢ" or "CATⅣ", to mark relevant measurement category. (See 6.7.4)
Note 1. This section uses the term "non-insulated", it refers not only insulated conductor, but also indicates that by no means meet the basic requirements of the insulation voltage
Edge conductor.
Note 2. Measurement category may also be labeled "category Ⅱ", "category Ⅲ" or "Category IV."
And the value of the property shall be marked with the maximum rated current.
By visual inspection to verify eligibility.
5.4.4 operating equipment
instead.
If applicable, the instructions shall include.
a) an operation control device and for identifying the various operating modes;
b) with accessories and other devices through the description, including the identification of suitable attachments, removable parts;
c) intermittently operating limits specification;
d) explain the symbols used in the safety-related device;
e) the replacement of instructional materials consumption;
f) Description of the cleaning and disinfection;
g) mounting and dismounting of the current sensor;
h) Installation and removal of B or C type current sensor, a current to be measured is mounted off point instructions, or to adopt a charging installation in a hazardous
GB 4793.2-2008/IEC 61010-2-032.2002
A description of safety procedures;
i) If there is to be accessible live parts dangerous site of the measurement, the operator must use special protective equipment
caveat;
j) illustrate a touch pointer or baffles function to limit the safe range indicated hand portion;
k) If the internal insulation of the cord contrasting colors visible warning people not using a flexible current sensor (see 6.9.101.5) operation;
l) If the wear indicator jaw visible warning people do not use the current sensor (see 6.9.101.2) operation.
Should be described in the specification, if not specified by the manufacturer The method of using the device, it may damage the protective equipment provided.
By visual inspection to verify eligibility.
6 against electric shock
Except as follows, GB 4793.1 Chapter 6 are applicable.
6.1.2 Exception
It added the following new entries aa).
aa) satisfy the requirements of internal jaws 6.9.101 conductive parts.
6.7 clearances and creepage distances
6.7.3 circuits other than the power supply circuit
6.7.3.1 General requirements for clearance value ---
instead.
Instead of 6.7.3.1c with the following).
Accessible parts of the current sensor does not allow the use of reduced clearances homogeneous structure.
6.9 Structure of protection against electric shock in claim
Replace the name of this section the following.
6.9 Protection against electric shock and short-circuiting prevention structural requirements
An Article.
6.9.101 pliers jaws and insulation requirements
6.9.101.1 Overview
All measurements and tests in 6.9.101.3,6.9.101.4,6.9.101.7 should 6.9.101.2 press jaws as defined
After pretreatment.
NOTE. pretreated to simulate abrasion during insertion and removal of tongs.
Pretreatment 6.9.101.2 jaws
A and B for the current sensor (except for the flexible current sensor), a current sensor samples under normal conditions 3 and 3 has been
Current sensor samples processed according to a predetermined 10.5.2a) in, processed in the following manner.
Test surface consisting of a rigid, two-sided abrasive cloth covered, the minimum size of the test surface 50mm × 450mm, a thickness of no more than
2mm. No. 120 grit emery cloth is, by the alumina abrasive, cloth lining and the coating composition.
Jaws open, the current sensor is placed into a 90 ° position with the test surface, the clamp is then closed.
The current sensors do 200mm distance moved along the test surface, if the design is limited by a movable short distance, for a total of
15 cycles (one cycle including a forward and reverse movement of a), to close the clamp polishing, Figure 102. If there is insulation jaws
Wear indicator body, the completion of the first 15 cycles if the wear indicator body is visible, the process ends. When each sample, emery cloth replacement.
FIG processing jaws 102
GB 4793.2-2008/IEC 61010-2-032.2002
6.9.101.3 contacting hazardous live conductors Protection
In order to reduce the risk of operator exposure to hazardous live conductors, A-type current sensor or a touch baffles should have a pointer to the operator
Warning limit the scope of security staff touched. The touch pointer should cover at least 50% of the Zhou Chang, and should extend at least partially into the hand of the
Opposite sides.
The double insulation clearances and creepage distances between live parts and the risk of baffles or touch pointer should meet the rated voltage
By visual inspection, clearance and creepage distance measurement, the dielectric strength test of 6.8 and 6.2 pairs of determination of accessible parts
Given to verify eligibility.
legend.
1 --- hazardous live conductors;
2 --- baffle;
Clearances 103 between baffles or pointer touching and FIG hazardous live conductors and the jaw
6.9.101.4 hand-held or hand-operated parts
A current sensor of the handheld or handheld components so as to strengthen the jaw by an insulating double insulation or accessible magnetic circuit, with the risk
Electrical conductors, input and output circuits and conductors separated. In normal use, the wires should be considered with the input and output circuit connected to the touch and a
The magnetic circuit and the charging voltage state at risk.
By visual inspection, clearance and creepage distance measurement, the dielectric strength test of 6.8 and 6.2 pairs of determination of accessible parts
Given to verify eligibility.
6.9.101.5 insulating flexible current sensor
The flexible cord for the current sensor with a wear indicating member, should provide at least the new double insulation or reinforced insulation, when the wear indicator
Visible should provide at least basic insulation.
The current sensor to the flexible cord without wear indicating member, and a new wear life than the typical, or should be added to provide double insulation
Strong insulation.
Is checked by the following test eligibility.
Three samples tested for the flexible cord clamp untreated current sensor, and 3 has been press 10.5.2a) specified in treated plots
Products, each sample length of 1m.
The value of the dielectric strength test reinforced insulation, on an untreated sample as described in 6.8.
To each sample was mounted on the polishing pad slides over the pulley, the pulley inner diameter of the sample to conform (see FIG. 105), the fixed pulley so as not to
Rotatably (see FIG. 104). No. 120 grit emery cloth is, by the alumina abrasive, cloth lining and the coating composition. In order to avoid rolling cord, slip
Concave inner surface of wheel arc.
Placed on the cord pulley (see FIG. 104), so that a 90 ° arc by the support pulley. One end of the cord to the sprung mass of 1kg
Weights. Cord should be placed, so that the intermediate position in the longitudinal midpoint of the cord in the circulating polishing pad center. Guide means which prevents swinging weight,
Emery cloth cord by the number of cycles of the surface 15, or compare the wear indicator is the number of visible color change, whichever is smaller ---
GB 4793.2-2008/IEC 61010-2-032.2002
A cycle includes a free end cord to the front and a reverse movement, the cord moving distance of 0.5m.
Each should be between the inner conductor and the cord wound on the outer sheath of metallic foil through said sample loop processing
The dielectric strength test in GB 4793.1 6.8. If, as a visible color change caused by comparison loop process is terminated, basic insulation should be used
Voltage margin test value. If no color contrast becomes 15 cycles is completed during the cycle process is visible, the test should be used to strengthen the insulation voltage
Check value.
legend.
1 --- cord;
2 --- fixed sheave;
3 --- 1kg weight;
4 --- weight guide means.
The flexible current sensor 104 of FIG insulating loop processing
Legend and size.
1 --- ≥5 × inner diameter of the cord pulley diameter;
2 --- pulleys the radius of curvature ≥5 × cord diameter.
FIG. 105 for the pulley 104 of loop processing
The flexible current sensor cap 6.9.101.6 tensile test
The flexible current sensor cap should be securely fastened, which can withstand any forces that may occur in normal use.
By visual inspection and make the following tests on each end cap to verify eligibility. The end cap stuck it can not move, so that the cord can
100N withstand the constant axial force, or expansion force of the clamp 4 times, wherein the selected larger, holding 1min. If the cord at the end of the clamp
Insulation displacement exceeds 2mm, then carried up to 15 replicates, each lasting 15s. In addition to displacement of the first test, the insulation
Displacement body shall not exceed 1mm.
GB 4793.2-2008/IEC 61010-2-032.2002
After the test.
a) a current sensor must not be damaged;
b) clearances and creepage distances not less than the upper limit of reinforced insulation 6.7.4;
c) In the absence of wet pre-treatment, the value of reinforced insulation, the current sensor by a dielectric strength test should be 6.8.
6.9.101.7 pliers jaws and cause a short circuit protection
A current sensor for a predetermined clamp on the non-insulated conductors or metal parts inside the bus bars should have a housing space in its closed
Providing at least basic insulation between the inner. Insulating characteristics should be based on the rated working voltage.
By measuring the clearances between the closed space (housing) in the jaw inside surface of the outer metal parts and creepage distances to verify
qualified. When the jaws are in a closed position, in the closed space between the metal parts inside the outer clamp surface (surface of the metal foil wrap) and should be
Dielectric strength test, the test voltage value of 6.8 using basic insulation.
A and B should have additional protection current sensor, a current sensor is inserted and moved between the conductors or bus bars, by a pair of tongs
Short circuit caused by opening to provide protection. Protection should be based on the basic insulation rated voltage to provide.
Note 1. The example may be a protection panel, opposite sides of the shutter, cover or retaining jaws distance.
Note 2. For purposes of this section, may be considered a single electrode does not clamp the two short-circuiting the electrical conductors separated installation point.
By the following test to verify eligibility.
Operating voltage table 101 is not larger than the maximum rated operating voltage clamp, as shown in FIG test probe 106, jaw insert 107 in FIG.
Shows. After insertion of the probe, the value used is substantially 6.8 insulation dielectric strength test between the test leads.
legend.
1 --- non-conductive material;
2 --- conductive material;
3 --- test leads;
D --- diameter of the conductive material;
The total thickness of the X---- test probe.
FIG short circuit protection test 106 checks probe
GB 4793.2-2008/IEC 61010-2-032.2002
Test probe 106 107 FIG Usage
The thickness of the test probe 101 in Table
Clamp operating voltage/V ≤100 150 300 600 1000
The thickness of the probe X/mm (see Note) 36101525
NOTE. If the clamp is not opened to the appropriate size, the probe thickness should be same as the maximum size of the jaw open.
7 against mechanical hazard
GB 4793.1 Chapter 7 apply.
8 mechanical shock resistance and impact
Except as follows, GB 4793.1 Chapter 8 are applicable.
8.1.2 Dynamic test
instead.
Substituted with the following paragraph, but retain Figure 4.
A three samples were tested type current sensor, a current sensor is firmly fixed to the rigid support, the jaws as much as possible
Open, maximum opening to 45mm. For each sample, three points may be tested up to the outer surface of the jaws. If the current sensor
Ambient temperature is below the minimum rated 2 ℃, the current sensor is cooled to the lowest rated ambient temperature, and then tested in 10min.
Test was carried out according to Figure 4. X is a height of 1m, the impact member having a diameter of 50mm, 500g ± 25g mass of the ball. can
Volume level is 5J.
Dielectric strength test and the 6.8 rated voltage corresponding to the test probe of FIG jaw 106 (not pre-wet in the
Li), the test voltage substantially insulation test voltage.
9 to prevent the spread of flame
GB 4793.1 Chapter 9 apply.
The temperature limit device 10 and heat
GB 4793.1 Chapter 10 are applicable.
11 Anti-dangerous fluid
GB 4793.1 Chapter 11 are applicable.
12 radiation (including laser light source), an acoustic and ultrasonic pressure
GB 4793.1 Chapter 12 apply.
GB 4793.2-2008/IEC 61010-2-032.2002
13 pairs of released gases, explosion and implosion protection
GB 4793.1 Chapter 13 apply.
14 components
Except as follows, GB 4793.1 Chapter 14 are applicable.
An Article.
14.101 measurement signal lines and lead
A signal line, a measurement lead and their accessories shall meet the requirements of GB 4793.5.
Accordance with the requirements of GB 4793.5 Compliance is checked.
15 with the protective interlock
GB 4793.1 Chapter 15 are applicable.
Test and measurement equipment 16
Except as follows, GB 4793.1 Chapter 16 are applicable.
An Article.
16.101 current sensor with internal current transformer
If the breaking current sensor output signal generates a high voltage, the current sensor configuration should provide adequate protection against
Any dangerous occurrence.
By visual inspection and following overload test to verify eligibility. Overload test is applied at the maximum rated current of 2 times the caliper of
10s and is applied at a constant maximum rated current clamp. During the test shall not cause a dangerous break occurs.
GB 4793.2-2008/IEC 61010-2-032.2002
appendix
Except as follows, GB 4793.1 Appendix apply.
Appendix D
(Normative)
During a predetermined required parts of the insulation (see 6.4 and 6.5.2)
Except as follows, GB 4793.1 Appendix D apply.
Increase map
legend.
1 --- ha...
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