This standard applies to cable reels with a rated voltage exceeding 50V but not exceeding 250V (single-phase cable reels) or exceeding 50V but not exceeding 440V (all cable reels except single-phase) and a rated current not exceeding 16A, which are equipped with a non-detachable flexible cable and are used for alternating current purposes only. These cable reels are used indoors or outdoors for household, commercial, light industrial and similar purposes where safety requirements are particularly high during normal use. Cable reel devices installed in appliances are under consideration. Cable reels that meet the requirements of this standard are suitable for use in places where the ambient temperature does not normally exceed 35°C but occasionally reaches 40°C. In some special occasions, special structures may be required. GB/T 19637-2005 Electrical accessories-Cable reels for household and similar purposes GB/T19637-2005 Standard download decompression password: www.bzxz.net

ICS 29. 120. 99
National Standard of the People's Republic of China
GB/T19637—2005
Electrical accessories
Cable reels for household and similar purposes
Electrical accessories--Cable reels for household and similar purposes(1EC 61242:1995,M0D)
Issued on January 18, 2005
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Administration of Standardization of the People's Republic of China
Implementation on August 1, 2005
GB/T19637--2005
This standard is modified and adopted by 1E61242:1995 (First Edition) Electrical accessories--Cable reels for household and similar purposes (English version) This standard was newly drafted based on IFC61242:1995. During the drafting process, a small number of modifications were made according to the actual situation in my country. The main differences between this standard and IEC612421995 are: ---- In Chapter 1, considering the underground location and actual natural climate temperature distribution in my country, the annual average temperature and maximum temperature in the subtropical and humid tropical areas south of the Yangtze River are relatively high, and the humidity is relatively high: Therefore, this standard changes the original IEC text: \ Cable reels that meet the requirements of this standard are suitable for use in places where the ambient temperature does not exceed 25℃ but occasionally reaches 35℃. \ Modified to! "Cable reels that meet the requirements of this standard are suitable for use in places where the ambient temperature does not exceed 35℃ and occasionally reaches 40℃." - In Chapter 8, protection against electric shock, IEC61242 stipulates: The additional test temperature for elastic materials or thermoplastic materials is 35℃+2℃. This standard is changed to 40℃±2℃ to correspond to the harsh ambient temperature conditions in my country. - The note under 12.2 is deleted. The original note reads: Due to the existence of ungrounded sockets, the following countries do not allow such ungrounded cable reels: Denmark, Poland, Poland, Sweden. - The note under 12.11 is deleted. The original note reads: "The following countries do not allow the installation of fuses: Belgium, Denmark, Finland, Norway." - The note under 12.12 is deleted. The original note reads: "The following countries require the test to be carried out at -25℃ ±2℃ due to extreme cold: Belgium, Denmark, Finland, Norway." - In Chapter 16, moisture resistance test, IEC61242:1995 stipulates that the test temperature and pretreatment temperature are "any convenient value between 20℃ and 30℃ ±1℃. According to GB/T2423.3 and the specific environmental conditions of my country, this standard is revised to: \40＝2℃." - The note under 21.2 is deleted. The original note reads, "The following countries require testing at -15°C ± 2°C due to extreme cold: Denmark, Finland, Norway, Switzerland." Appendix A and Appendix B of this standard are informative appendices. This standard is proposed by the China Electrical Equipment Industry Association. This standard is under the jurisdiction of the National Technical Committee for Standardization of Electrical Accessories. The drafting units of this standard are: Guangzhou Electric Science Research Institute, Ningbo Linsheng Electric Co., Ltd., Guangdong Shantou Dongya Electric Factory, Yuyao Guochang Electric Co., Ltd.
The main drafters of this standard are: Luo Huaiping, Feng Yonglin, Ding Han, Chen Guochang, Ji Jun. This standard is entrusted to the National Technical Committee for Standardization of Electrical Accessories for interpretation. 1 Scope
Electrical accessories Cable reels for household and similar purposes GB/T 19637—2005
This standard applies to cable reels for alternating current use only, with a rated voltage exceeding 50V but not exceeding 250V (single-phase cable reels) or exceeding 50V but not exceeding 440V (all cable reels except single-phase) and a rated current not exceeding 16A. These cable reels are used indoors or outdoors for household, commercial, light industrial and similar purposes with special safety requirements during normal use.
Cable reel devices installed in appliances are under consideration. Cable reels that meet the requirements of this standard are suitable for use in places where the ambient temperature does not usually exceed 35℃ but occasionally reaches 40℃. In some special applications, special structures may be required. Note: This standard does not apply to cable reels equipped with a detachable flexible cable. 2 Normative References
The clauses in the following documents become the clauses of this standard through reference in this standard. For all referenced documents with dates, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, all parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all referenced documents without dates, the latest versions are applicable to this standard. GB2099.1-1996 Plugs and sockets for household and similar purposes Part 1: General requirements (eqvIEC60884-1: 1914) GB/T2900.18-1992 Electrical terminology Low-voltage electrical apparatus (eqvIEC60050 (441): 1984) GB/T4207-2003 Method for determining the comparative tracking index and tracking resistance index of insulating materials under humid conditions (idt IEC 60112, 1979)
GB4208: 1993 Degrees of protection of enclosures (IP code) (eqvIEC60529: 1989) GB 5013-- 1997
Rubber insulated cables with rated voltages of 450/750V and below (idt IFC60245: 1994) GB 5023--1997
Polyethylene insulated cables with rated voltage of 450/750V and below (idtIEC60227) GB/T5169.11-1997 Fire hazard test for electric and electronic products Test methods Guidelines for finished product glow-wire test (idtIEC60695-2-1: 19943
GB/T 5465.2---1996
Graphical symbols for electrical equipment (idtIEC60417: 1994) GB/T 9797-1997
GB/T9799-1992
GB/T 12599--2002
Metallic coatings Nickel + chromium and copper + chromium electrodeposited layers (evISO1456:1988) Metallic coatings Zinc electroplated layers on steel (egJS02081:1986) Metallic coatings Tin electroplated layers Technical specifications and test methods (M0DIS02093:1986) GB16895.5-2000 Electrical installations in buildings Part 4: Safety protection Chapter 43: Overcurrent protection (idtIEC60364 4-43:1977)
GB 17464-1998
60999:1990)
Connectors Safety requirements for threaded and threadless clamps for connecting copper conductors (idt IFC Electrical Installations of Buildings Part 4: Safety Protection Chapter 47 Application of Safety Protection Measures IFC60364-4-473:19913
Section 173: Overcurrent Protection Measures
1) Some areas in China have a tropical climate, and modifications have been made taking into account our actual situation. The ambient temperature specified in this article of IEC61242:1995 is: "The ambient temperature is more than 25℃ and occasionally reaches 35℃. GB/T 19637--2005
3 Definitions
This standard adopts the following definitions:
Unless otherwise specified, all "voltage" and "current" refer to their rms values ​​(root mean square values). 3.1
Eratedvoltage
Erated voltage
The voltage specified by the manufacturer for the cable reel. 3.2
Rated current
Rated current
The current specified by the manufacturer for the cable reel.
Cable reel cablereel
A device composed of a flexible cable installed on the reel, the structure of which can make the flexible cable reel roll up. Note: The plug and socket supplied with the cable reel are regarded as parts of the cable reel. 3. 3.t
Portable cable reelPortable cable reel is a cable reel that can be easily moved from one place to another. 3.3.2
Fixed cable reelFaxed cable reelA cable reel designed to be mounted on a fixed bracket. 3.4
Non-detachable flexible cableNon-detachable flexible cableA flexible cable fixed to a cable reel.
Rewirable cable reelRewirable cable reelA cable reel that can be replaced with common tools. 3.6
Non-rewirable cable reel A cable reel that is structurally a complete unit with the flexible cable, and the plug and socket are fixedly installed by the cable reel manufacturer. Once the cable reel is disassembled, the cable reel cannot be used any longer. (See 12.5) 3.7
Easy to touch partsaceessiblepart
Parts that can be touched with the standard test finger.
Detachablepartdetachablepart
Parts that can be disassembled without ordinary tools. 3. 9
Creepage distance
The shortest distance between two conductive parts measured along the surface of the insulating material. 3.10
Electrical clearance
The shortest distance between two conductive parts measured along a tight rope (IEV441-17-31), 3.11
Thermal cut-out
GB/T 19637—2005
A temperature-sensitive control device that cannot be adjusted by the user and is used to automatically shut down under abnormal operating conditions. 3.12
Current cut-out
A current-sensitive control device that cannot be adjusted by the user and is used to automatically shut down under abnormal operating conditions. 3.13
Irip-free mechanism is a mechanism used to prevent a sustained over-temperature or over-current condition, which is designed so that the reset mechanism cannot be used to prevent or control disconnection, so that it can neither prevent the contacts from opening nor keep the contacts closed. 3.14
Non-selr settingthermal or current cut-outA thermal or current cut-out that can only be reset manually by directly acting on a special reset device installed in the cable reel.
Basic insulationbasicinsulalion
Insulation added to hazardous live parts to provide basic protection against electric shock. 3.16
Supplementary insulationsupplementary insulationIndependent insulation added to basic insulation to provide protection against electric shock in the event of a failure of basic insulation. 3.17
Double insulationdouble insulation
Insulation composed of both basic insulation and supplementary insulation to provide protection against electric shock in the event of a failure of basic insulation. 3.18
Reinforced insulationreinferced insulationA separate insulation system added to live parts that provides the same level of protection against electric shock as double insulation. 3.19
clamping piececlanpingnit
parts necessary for mechanical clamping and electrical connection of the conductor in the terminal, including the case required to ensure the correct contact pressure. 3.20
terminalterminal
conductive part of one pole consisting of one or more clamping pieces and, if necessary, insulation. 3.21
connecting devicecotinectingdevice
device consisting of one or more terminals fixed to a base or forming an integral part of the equipment for making electrical connections between one or more conductors.
terminatiun
connecting device used as a non-reusable connection for power conductors, insulated or non-insulated, 4 general requirements
cable reels should be designed and constructed to ensure reliable performance in normal use and not cause harm to users and the surrounding environment. Compliance shall be checked by all relevant specified tests. GB/T 19637--2005
5 General conditions for type tests
5.1 Tests carried out in accordance with this standard are type tests. 5.2 Tests shall be carried out on three samples in the delivery state, unless otherwise specified. The optical parts of the cable reel shall be tested in accordance with the applicable requirements of the relevant standards, unless otherwise specified. 5.3 Tests shall be carried out in the order of the clauses at an ambient temperature between 15℃ and 35℃. Unless otherwise specified, in case of doubt, the tests shall be carried out at an ambient temperature of 20℃ to 5℃. 5.4 Three samples shall be submitted for all tests, and all tests shall be qualified to meet the requirements, unless otherwise specified. If only one sample fails in a test due to an assembly or manufacturing defect, which does not represent a design feature, the test shall be repeated on another set of three samples and the subsequent tests shall be carried out in the required order. This set of samples shall all meet the requirements.
6 Classification
Cable reels are classified as follows:
6.1 Classification by method of use
-Mobile;
-Fixed
6.2 Classification of reels for flexible cable connection
-Manual operation;
-Automatic, i.e. spring operation or motor operation. 6.3 Classification by flexible cable connection method
Removable wires;
Non-removable wires.
6.4 Classification of protection level against electric shock
-General protection (e.g.: can meet the requirements of 8.1.1); Enhanced protection (e.g. can meet the requirements of 8.1.2). 6.5 Classification by degree of protection against harmful water ingress: No protection against harmful water ingress;
---Splashing water, that is, the protection level is IPX4; - Water spraying, that is, the protection level is IPX5. 6.6 Classification by protection against excessive temperature: - With thermal release and/or electric release: - Internal surface-mounted thermal release and/or current release 7 Markings
7.1 The cable reel should have the following markings:
-Rated voltage (V);
-Symbol of the nature of the power supply;
Name, trademark or identification mark of the manufacturer or agent: - Model, the model can be a registration number;
-Protection level against water ingress: If it is higher than 2; Note: The protection level is based on GH 4208. The maximum load that can be connected to the socket, shown as both W and V, if it can be fully coiled or fully unreeled: for example: "1500W 230V flexible cable fully coiled; 3000W 230V flexible cable fully unreeled."
GB/T19637-—2005
Cable reel without over-temperature protection function. In addition to the maximum permissible load mark, the following mark should also be marked: "Caution! Exceeding the maximum permissible load may cause a fire hazard! Cable reels equipped with thermal releases and/or current releases should indicate the reset method of the release. Note: Cable reels can also be marked with the rated current (A). 7.2 When using symbols, the following symbols should be used: Ampere
-Volt
-Watt
Alternating current
-Towel
-Earth
Fully wound cable reel
Fully unwound cable reel
-Splashproof
-Sprayproof
Note 1 The lines formed by the tool knot are not used as marks. Note 2: For the structure of the ac, and \earth\ symbols, see GR/T 5162.2. Note 3. The letter "text" should be replaced with the corresponding number: In this standard, the minimum number is "2". 7.3 The removable cable reel should be marked as follows: The terminal for the flexible wire should be indicated by the letter N; the grounding terminal should be indicated by the symbol of the ground wire: A
: IPX4
The markings indicating the cross-sectional area, type and length of the conductor should be clearly visible. These markings should be placed in a place that is easy to see when replacing the flexible relay, but should not be located on the screw, removable gasket or other parts that will be removed when the conductor is connected. 7.4 The information required by 7.1 should be clearly visible during normal use of the cable reel. If there are symbols specified in sub-clause 7.2, they should also be shown with these symbols. Otherwise, they should be expressed in Chinese. In addition, the position of the symbols for the water ingress protection level and the maximum load should be ensured to be clearly visible. To achieve clear visibility, the following methods can be used: enlarged letters, contrasting colors, bottom lines, and different rows and columns. 7.5 If signs or labels are used, they shall be securely fixed. After all tests in this standard, the signs shall remain legible and the labels shall not curl or become loose at the corners or at the reverse edge. Compliance with the requirements of 7.1 to 7.5 shall be checked by observation and by the test of 7.6.6 The mark is durable and should be clearly visible to normal or corrected vision without additional magnification. Compliance is checked by observation and the following test: Wipe the mark with a cloth soaked in water for 35 seconds, then wipe the mark with a cloth soaked in gasoline for 15 seconds. Note 1: This test is not performed on marks made by printing, casting, pressing, engraving, etc. Note 2: It is recommended that the gasoline used in the test be a solvent that has been burned, with a maximum aromatic content of 0.1% by volume, a Baker's rosin alcohol value of 29, an initial boiling point of about G5°C, a dry point of about 69°C, and a specific gravity of about C. 6 g/eml. 8 Protection against electric shock
8.1 The cable reel should be designed to meet the following requirements: when the cable reel is in normal use and when the parts that can be removed without tools are removed, the live parts are not easily touched. GB/T19637-2005
is qualified. Through observation, if necessary, the test inspection of 8.1.1 shall be carried out. For cable reels with enhanced protection against electric shock, the test of 8.1.2 shall also be carried out.
These tests shall be carried out in an environment where the cable reel is at 2℃ ± 5℃. 8.1.7 Apply the standard push test finger shown in Figure 1 to each possible position with a force of 10 N ± 1.X and indicate contact with the relevant parts with an electrical indicator having a voltage not less than 40 V and not more than 50 V. For cable reels where the use of elastomeric or thermoplastic material would affect the compliance requirements, this test shall be repeated. The test shall be carried out at an ambient temperature of 40°C ± 2°C and the cable reel shall be at this temperature. During this additional test, the parts of the elastomeric or thermoplastic material in the cable reel shall be subjected to a force of 75 N for 1 min, which is applied through the end of a straight and unchained test finger of the same size as the standard test finger. The test finger equipped with the electrical indicator specified above is pressed against all parts of the cable reel where deformation of the insulating material would endanger the safety of the cable reel. During this test, the cable reel shall not be deformed to such an extent that the dimensions required to ensure safety are excessively changed, nor shall any live parts become accessible.
8.1.2 The test is to be carried out with a force of 181N using the probe specified in Figure 2. The probe shall be free of lint and shall be at an angle of 90° to its length. If the wire cannot enter the enclosure, or if it can enter but cannot touch live parts in the enclosure, the protection against electric shock is considered satisfactory. The test wire is equipped with an indicator with a voltage not less than 40V but not more than 50V, which can show the contact with the relevant parts. 8.2 The components providing protection against electric shock shall have sufficient mechanical strength and shall be firmly fixed by screws or other reliable means to prevent loosening during normal use.
Compliance shall be checked by observation and by the tests of Chapters 21 and 23. 9 Grounding measures
9.1 For removable cable reels with easily accessible metal parts and live parts separated by only basic insulation: "The grounding terminal shall comply with the requirements of Chapter 10: The grounding terminal shall be located near the terminal of the current-carrying conductor; the internal connection between the grounding terminal and the easily accessible metal part shall be independent of the connection of the flexible cable to prevent the internal connection from loosening when the flexible cable is replaced;
The socket shall be a socket that can prevent the plug used for Class 0 equipment from being inserted. Note: Class 0 spare plugs can only be used when permitted by national regulations. 9. 2 All parts of the grounding terminal shall not be subject to corrosion due to contact with the steel of the grounding conductor or any other metal. The body of the grounding terminal shall be made of brass or other metal with corrosion resistance not less than that of copper, except where the body is part of a metal frame or housing. The screws or nuts shall be made of brass or electroplated steel that meets the requirements of Chapter 26 or other metal with equal corrosion resistance. 9.3 If the body of the terminal is part of an aluminium or aluminium alloy frame or housing, care shall be taken to avoid corrosion due to contact with aluminium or aluminium alloy.
Use the terminal body to withstand the conditions of Chapter 26. Screws and nuts made of key steel used in the test are deemed to have corrosion resistance not less than that of copper. 9.4 All easily accessible metal parts that may become live when the insulation fails shall be permanently and firmly connected to the grounding terminal. In this requirement, small screws used to fix the base or cover are not considered to become live parts when the insulation fails. 9.5 Under all circumstances that may occur during normal use, including loosening of the cover fixing screws, careless installation of the cover or other similar parts, etc., the grounding connection requirements shall be ensured. Whether the requirements of sub-clauses 9.1 to 9.5 are met, Through observation and inspection. 9.6 The grounding terminal used to connect the external soft wire should have sufficient space to allow the grounding wire to have a certain margin. In case the stress buffering measures fail, the grounding wire joint will only be stressed after the current-carrying wire joint is stressed. Moreover, in the case of excessive stress, the grounding wire will only break after the current-carrying wire is broken.
Whether it is qualified, pass the following test inspection:
GB/T 19637—2005
When the flexible cable is connected to the cable reel, the current-carrying conductors shall be guided along the shortest path to the corresponding terminals with stress relief measures. After the current-carrying conductors are properly connected, the core of the grounding conductor is guided to the grounding terminal and then cut at a point 8 trm longer than the length exposed when it is properly connected.
Then the grounding conductor is connected to the grounding pin. When the cover of the cable reel is properly reinstalled and secured, the wiring space must be able to accommodate the wire loop formed by the excess length of the grounding conductor. 9.7 The internal grounding circuit in the cable reel, including any joints, etc., shall be of low resistance. Compliance is checked by the following measurement after the test specified in Chapter 21: The grounding circuit is passed through 1.5 times the rated current of the flexible cable or 25A, whichever is greater, from an AC source with an unloaded voltage not exceeding 12V. The voltage drop is measured and the voltage is calculated from the current and this voltage drop. The voltage shall not be greater than 0.05 2.
9.8 For cable reels where accessible parts are separated from live parts by basic insulation only, the connection between the earthing terminal for the incoming flexible cable and the accessible metal parts of the cable reel shall be of low resistance. Compliance is checked after the test specified in Clause 21 by the following measurements: The earthing circuit is passed with 3.5 times the rated current of the flexible cable or 25 A, whichever is the greater, from an alternating current source having a no-load voltage not exceeding 12 V. The voltage drop is measured and the resistance is calculated from the current and this voltage drop. The resistance shall not be greater than 0.1.
9.9 Internal movable earthing contacts of the cable reel. For example, slip rings shall comply with the following requirements. 9.9.1 The movable earthing contacts between the earthing conductor of the internal incoming flexible cable and the earthing terminal of the outgoing flexible cable or the earthing terminal of the socket-outlet shall be double.
One of the movable contacts shall be a slip ring or equivalent contact and the other may be a ball bearing, sliding bearing or similar bearing, but this movable contact must be made of metal. 9.9.2 The movable earthing contact between the terminal for the earthing conductor of the internal flexible cable and the metal part of the cable reel shall be double. If it is made of metal, each may be a ball bearing, sliding bearing or similar bearing. 10 Terminals or terminations
10.1 Non-detachable cable reels shall be equipped with terminations consisting of tinned, welded, crimped or equivalent non-reusable joints.
Connections by crimping pre-soldered flexible conductors are not allowed, except where the soldering area is outside the crimping area. Compliance shall be checked by inspection
10.2 Removable cable reels shall be equipped with screw-type terminals for external copper conductors. The parts of the terminal used to clamp the conductor shall not help to fix other parts, but may be used to keep the terminal in normal position or to prevent the terminal from rotating.
Internal connections shall be separated from external flexible cable connections. NOTE: If the internally wired conductors can maintain their correct position in the terminals when the external flexible cable is replaced, the internal connection is considered a "signal of improper external flexible cable connection".
Compliance is checked by inspection.
10.3 Screw-clamp terminals for connecting external copper conductors 10.3.1 The cable reel shall be equipped with terminals that can correctly connect copper conductors of the nominal cross-sectional area shown in Table 1. GB/T 19637—2005
Rated current/A
16 A mobile cable reel
10 A fixed cable reel
10 A-~16 A fixed cable reel
Table 1 Nominal cross-sectional area of ​​conductors
Hard (solid or wire-threaded) pin conductor
Nominal cross-sectional area
1,5~2X2.5
Diameter of the thickest conductor/
Teaching wire
Nominal cutting area/
0. 75 -1. 5
0. 75 ~1.5
Diameter of the largest conductor
Compliance shall be checked by inspection and by the following operation: Remove the insulation of the thickest conductor and reshape the ends of the hard and soft conductors and then insert the conductors. The ends of the conductors with the insulation shaved off shall be fully inserted into the openings of the fasteners without excessive torque. 10.3.2 Screw-type terminals shall be able to connect conductors that have not been specially treated. Compliance shall be checked by inspection.
, "special treatment" includes welding of wire wires, use of cable ferrules, production of eyelets, etc., but does not include shaping of the wires before insertion into the terminals and the twisting of the wire ends to harden them. 10.3.3 Screw-type terminals shall have sufficient mechanical strength. The screws and nuts used to clamp the conductors shall be of national standard ordinary thread (equivalent to metric ISO threads).
Compliance shall be checked by inspection.
10.3.4 Screw-type terminals shall be corrosion-resistant. Terminals whose bodies are made of the metal specified in 23.5 are deemed to comply with the requirements of this standard. Terminals made of nonferrous metals are subjected to the test of clause 2h. NOTE Tests for terminals made of other materials are under consideration. 10.3.5 Screw-type terminals shall be secured so that the terminals do not become loose, the internal conductors are not subjected to stress, and the galvanic distances and clearances do not fall below the values ​​specified in clause 24 when the clamping members are tightened or loosened. Compliance is checked by inspection after the test of 23.1. NOTE 1 The terminals may be secured against loosening by two screws, by a screw fixed in a recess so that the terminal is not visibly dislodged, or by other suitable means. NOTE 2 Pre-sealing with a light sealant, without other means of locking, is not sufficient. Instead, a curing resin may be used to secure the terminals which are not subjected to mechanical stress in normal use. Screw-type terminals shall be capable of clamping the conductor without undue damage to the conductor. Compliance shall be checked by the following test: Connect the clamping piece to the corresponding number of wires specified in Table 1, first to the wire with the smallest cross-sectional area and then to the wire with the largest cross-sectional area. The clamping screw or nut shall be tightened with the torque specified in Table 2. Table 2 Torque for testing screws and nuts Nominal diameter of thread/m1m
2>2. 8 --3. 0
73. 5~3, 2
3. 2 --3. 6
23, 6-~4., 1
>4. 1 4. 7
2-4. 7--5. 3
Torque/Nm
GB/T 19637--2005
Column I applies to headless studs that will not protrude from the screw hole after tightening, and other screws that cannot be tightened with a screwdriver with a blade wider than the screw diameter.
Column D applies to screws tightened with a screwdriver and screws and nuts that are not tightened with a screwdriver. Each conductor is subject to the following test, as shown in Figure 3. Insert the end of a conductor into the corresponding sleeve in the plate, which is positioned at a distance (H) below the test equipment. The sleeve hole diameter and value are given in Table 3. The sleeve should be located in the horizontal plane so that its center line can form a circle with a diameter of 75 mm and is concentric with the center of the clamping member located in the horizontal plane. Then, rotate the plate at a rate of (10 ± 2) revolutions/min. The distance between the door of the clamping member and the upper surface of the sleeve should be between 15 mm and the value in Table 3. To prevent the insulated conductor from being entangled, twisted or rotated, the sleeve can be lubricated. bZxz.net
Hang the weight specified in Table 3 on the end of the conductor. The test should last for about 15min. During the test, the conductor shall not fall out of the clamping member or break at the clamping member. The conductor shall not be damaged to the point that it cannot be used again. Table 3 Sleeve hole diameter, height and placement factors for checking the degree of conductor exposure (see Figure 3) Conductor cross-sectional area/
I) Deviation of distance H is 15 mm.
True diameter of bushing
Distance I
Weight plate corresponding to the conductor/
2) If the bushing hole is not large enough, the conductor must be bundled to be inserted into the bushing hole. A bushing with a larger hole size can be used. The terminal should not be subjected to additional torque and tension. During the test, no wire of a single-core conductor or stranded conductor should fall out of the terminal or break at the terminal. 10.3.7 The threaded terminal should be designed to clamp the conductor firmly between two metal surfaces. Compliance is checked by observation and the following test. Connect the corresponding number of conductors specified in Table 1 to the terminal, first the conductor with the smallest cross-sectional area and then the conductor with the largest cross-sectional area. Tighten the clamping screw with 2/3 of the torque specified in the corresponding column of Table 2. Then, each conductor is subjected to the tension specified in Table 4 for 1 min. The tension is applied in the direction of the conductor. When applying the force, no explosive force should be used.
Table 4 Tensile force
Cross-sectional area/m2
Tension force/N
Note: When conducting the tests of 10.3.6 and 11.3.7: The clamping device can be separated from the electric reel and tested separately: b) The manufacturer can provide clamping devices separately.
If the clamping device clamps two or three conductors, the corresponding tension should be applied to each conductor in turn. During the test, the conductor shall not move visibly in the terminal. 2.5
10.3.8 Screw-type terminals shall be designed or placed so that the wires of rigid single-core conductors or stranded conductors will not fall out when the clamping screw or nut is tightened.
To check whether the terminal is qualified, the following test is carried out: Connect the terminal to the wire of the largest cross-sectional area specified in Table 1: The terminal intended to form a loop with two or three wires shall be checked after the permitted number of wires are connected. Connect the terminal to the wire in accordance with the requirements of GB5023 and GB5013.
GB/T 19637--2005
Before inserting the rigid single-core wire or stranded wire into the clamping device of the terminal, the wire should be straightened. In addition, the stranded wire can be twisted to roughly restore it to its original shape. The flexible wire should be tightened in one direction so that it can be evenly tightened within a length of about 2cm. Insert the wire into the clamping part until it just protrudes from the other side of the clamping part and is in the position most likely to cause the wire to slip out. Then, tighten the clamping screw with 2/3 of the torque specified in Table 2. The flexible wire should be tightened in the same way as above, but in the opposite direction, and the test should be repeated with a new wire. After the test: No wire of the conductor shall escape from the clamping part. 10.3.9 The clamping screw or nut of the grounding terminal shall be fully locked to prevent accidental loosening; moreover, it shall not be possible to loosen them without tools.
Compliance? Perform dynamic test inspection.
Note: The terminal structure shown in GB17464 is sufficient to provide the resilience required by this test. 11 Flexible cable and its connection
11.1 The cable reel shall be equipped with a flexible cable that meets the requirements of GB5023 or GB5013. The flexible cable shall not be lighter than the ordinary rubber sheathed rescue cable of type 245TFC53 or the light PVC sheathed flexible cable of type 2271FC52. 11.1.1 The minimum size of the cable shall be based on the lowest rating of the cable reel plug or any protective device, in particular 1-6 A: not less than 0.75 mm;
: -.10 A, not less than 1.0 mm
-.16 A: not less than 1.5 mm* t- The size of other cables shall be determined by insertion method. 11.1.2 The number of cores of the flexible cable shall be equal to the number of poles of the plug or socket: if there are earthing contacts, they shall be regarded as one pole regardless of the number.
The conductor connected to the earthing contact shall be identified by green/yellow double color. 11.1.3 The maximum length of the flexible cable shall be as shown in Table 5. Table 5 Maximum length of flexible cable
Cross-sectional area of ​​flexible cable/mm*
Length of flexible cable/m
11.1.4 Soldering shall not be used to reinforce the ends of stranded conductors where the conductors are subject to contact pressure, except where the clamping device is designed to eliminate the risk of poor contact caused by cold flow of solder. Compliance with the requirements of 11.1 shall be determined by observation, measurement and inspection of the flexible cable in accordance with the applicable requirements of GB 5023 or GB 5013.
11.2 The cable reel shall be equipped with cable fixing parts so that the conductors are not subjected to stress including twisting at the terminals and the sheath of the conductors is protected from wear.
The cable fixing parts shall be made of insulating material or shall be equipped with insulating pads, which shall be fixed to the metal parts of the cable fixing parts. The clamping screws are accessible or electrically connected to accessible metal parts. The cable fixing parts should also be designed to ensure that the flexible cable will not touch these clamping screws.
The gland shall not be used as a cable fixing part. Expedient measures shall not be used, such as tying the flexible cable in a knot, or tying the ends of the flexible cable with ropes. Compliance shall be checked by observation.
11.3. For detachable cable reels
It should be clear how to relieve tension and how to prevent twisting, etc. The flexible cable fixing component or part of the flexible cable fixing component should be integral with a part of the cable reel or should be fixed to a part of the cable reel.
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