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GB/T 9364.2-2018Miniature fuses -- Part 2: Cartridge fuse-links (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

May 14, 2018

Implementation date

December 1, 2018

Scope

GB/T 9364.2-2018 (Miniature fuses -- Part 2: Cartridge fuse-links) is available as an English-translated PDF.

GB/T 9364.2-2018 — This part of GB/T 9364 specifies the technical specifications for the standard specifications, dimensions and structure, electrical properties of tubular fuse links. This section applies to the size of 5mm x 20mm that is usually intended to protect indoor electrical equipment, electronic equipment and components therein. And tubular fuse-links for 6.3mm x 32mm miniature fuses. This section also applies to miniature fuse-links with lead ends. The requirements for this type of fuse-link are given in Appendix A. This section does not apply to fuses of electrical equipment intended for use under special conditions (eg corrosion or explosive atmospheres). This part adopts the requirements of GB/T 9364.1-2015. The purpose of this section is to. in addition to the applicable requirements of GB/T 9364.1-2015, special requirements and additional provisions for tubular fuse-links are also specified. experiment method.

Document preview — GB/T 9364.2-2018

National Standard of the People's Republic of China

ICS: 29.120.50
Classification: K 31
Replacing: GB/T 9364.2-1997

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
1 Scope and purpose
2 Normative references
3 Terms and definitions
4 General requirements
5 standard rating
6 signs
6.1 increase.
6.4 Addition. The values of "d" and "s" should be (0.8 +/- 0.2) mm.
7 General description of the test
8 size and structure
8.2 Structure
8.3 terminal
8.4 Terminal alignment and shape
9 Electrical requirements
9.3 breaking capacity
9.3 Breaking capacity test
5 times rated current x
10 times rated current x
50 times rated current x
250 times rated current x
8.3 Terminal (end cap test) x x x x
9.3 Rated breaking capacity x
8.3 Terminal (end cap test) x x x x
9.3 Rated breaking capacity x
10 standard specification sheet

Foreword

GB/T 9364 "Miniature fuse" is divided into the following parts.

--- Part 1. General definition of miniature fuses and general requirements for miniature fuses;

--- Part 2. tubular fuse link;

---Part 3. Ultra-small fuse-links;

--- Part 4. Universal modular fuse-link (UMF) perforated and surface mount type;

---Part 5. Guidelines for the assessment of the quality of small fuses;

--- Part 6. Fuse holders for small tubular fuse-links;

---Part 7. Small fuses for special applications;

--- Part 10. User Guide;

--- Part 11. Fuse for LED lamps.

This part is the second part of GB/T 9364.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This part replaces GB/T 9364.2-1997 "Miniature fuses Part 2. Tubular fuse links". And GB/T 9364.2-1997

In comparison, the main technical changes are as follows.

--- Added standard specifications 6, 6, 8, 9 and 10 (see Chapter 10).

This section uses the redrafting method to modify the use of IEC 60127-2.2014 "Miniature fuses part 2. tubular fuse-links".

The technical differences between this part and IEC 60127-2.2014 and their reasons are as follows.

---About the normative reference documents, this part has made technical adjustments to adapt to China's technical conditions, adjustments

The situation is reflected in Chapter 2, "Regulatory References", and the specific adjustments are as follows.

* Replace ISO 3 with GB/T 321-2005 equivalent to the international standard;

* Replace IEC 60068-2-20 with GB/T 2423.28-2005 equivalent to the international standard;

* Replace IEC 60127-1.2006 with GB/T 9364.1-2015 modified to adopt international standards;

* According to the citation, IEC 60249-2-5 has been added;

--- According to the actual rated value of the product, the limit value range of the pre-arcing time of the standard specification sheet 7 is "greater than 630mA~"

6.3A" is modified to "greater than 500mA~6.3A";

--- According to the actual rated value of the product, modify the "8A~10A" in the limit value range table of the pre-arcing time of the standard specification sheet 8.

"greater than 6.3A~10A";

--- According to the actual rated value of the product, modify the "8A~10A" in the limit value range table of the pre-arcing time of the standard specification sheet 9.

"greater than 6.3A~10A";

--- According to the actual rating of the product, the "400mA~10A" in the limit value range of the pre-arcing time of the standard specification sheet 10

Changed to "greater than 315mA~10A";

---Standard current increase of standard specification sheets 7, 8, 9, 10 Note "The intermediate value should be from the R20 number system in accordance with GB/T 321-2005

Select. ";

--- Removed references.

This section has made the following editorial changes.

--- According to the provisions of GB/T 1.1-2009, in the "Scope" of Chapter 1, added "the GB/T 9364 part of this section specifies the tubular fuse

Technical specifications for body specifications, dimensions and construction, electrical performance, etc."

This part was proposed by China Electrical Equipment Industry Association.

This part is under the jurisdiction of the National Fuse Standardization Technical Committee (SAC/TC340).

This section drafted by. China Electric Apparatus Research Institute Co., Ltd., Nanjing Sartre Technology Development Co., Ltd., Hollyland (China) Electronics

Technology Co., Ltd., China Electronics Technology Standardization Institute, Dongguan Huade Electric Co., Ltd., Weikai Testing Technology Co., Ltd., Dongguan

Beite Electronic Technology Co., Ltd., Baifu Electronics Co., Ltd., Cooper Electronic Technology (Shanghai) Co., Ltd., Shanghai Songshan Electronics Co., Ltd.

Company, Xucheng Electronics (Shenzhen) Co., Ltd., Lite Fuse Co., Ltd., Shenzhen Liangsheng Electronics Co., Ltd., Wenzhou Hongfeng Electric Alloy Co., Ltd.

Co., Ltd.

1 Scope and purpose

This part of GB/T 9364 specifies the technical specifications for the standard specifications, dimensions and structure, electrical properties of tubular fuse links.

This section applies to the size of 5mm x 20mm that is usually intended to protect indoor electrical equipment, electronic equipment and components therein.

And tubular fuse-links for 6.3mm x 32mm miniature fuses.

This section also applies to miniature fuse-links with lead ends. The requirements for this type of fuse-link are given in Appendix A.

This section does not apply to fuses of electrical equipment intended for use under special conditions (eg corrosion or explosive atmospheres).

This part adopts the requirements of GB/T 9364.1-2015.

The purpose of this section is to. in addition to the applicable requirements of GB/T 9364.1-2015, special requirements and additional provisions for tubular fuse-links are also specified.

experiment method.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 321-2005 Priority and Priority Numbers (ISO 3.1973, IDT)

GB/T 2423.28-2005 Environmental testing of electrical and electronic products - Part 2. Test methods Test T. Soldering (IEC 60068-

2-20. 1979, IDT)

GB/T 2423.60-2008 Environmental testing of electric and electronic products - Part 2. Test methods Test U. Terminals and overall

Assembly strength (IEC 60068-2-21.2006, IDT)

GB/T 9364.1-2015 - Part 1 . Definitions for miniature fuses and general requirements for miniature fuses

(IEC 60127-1.2006, MOD)

IEC 60249-2-5 Substrate for printed circuits - Part 2. Specification No. 5. Specification for flammability (vertical burning test)

Oxygen glass woven copper laminate (Basematerialsforprintedcircuits-Part 2.Specifications-Specification

No.5. Epoxidewovenglassfabriccopper-cladlaminatedsheetofdefinedflammability(verticalburn-

Ingtest))

3 Terms and definitions

The terms and definitions defined in GB/T 9364.1-2015 apply to this document.

4 General requirements

This chapter of GB/T 9364.1-2015 is applicable.

5 standard rating

This chapter of GB/T 9364.1-2015 is applicable.

6 signs

This chapter of GB/T 9364.1-2015 is applicable with the following modifications.

6.1 increase.

e) A symbol indicating the rated breaking capacity. This symbol shall be marked between the rated current mark and the rated voltage mark.

These symbols are.

H. indicates high breaking capacity;

L. indicates low breaking capacity;

E. indicates enhanced breaking ability.

Example flag. T 3 1 5 L 2 5 0 V

F 4 H 2 5 0 V

T 3 1 5 E 2 5 0 V

6.4 Addition. The values of "d" and "s" should be (0.8 +/- 0.2) mm.

7 General description of the test

This chapter of GB/T 9364.1-2015 is applicable with the following modifications.

7.2.1 For each fuse rating test, the number of fuse links required is 48, of which 12 are reserved for spare parts. See the test list

Table 1.

For the same series of maximum ampere rating tests, the number of fuses required was 48, of which 22 were reserved for spare parts. Test list

Table is shown in Table 2.

For the same series of minimum ampere rating tests, the number of fuses required was 33, of which 16 were reserved for spare parts. Test list

Table is shown in Table 3.

7.3.1 Test fuse support

For tests requiring the fuse body to be mounted on the fuse support, fuses complying with Figure 1, Figure 2 or Figure 3 shall be used where applicable.

Support.

The contact resistance between each contact and the silver plated copper member having the same nominal size and shape as the tested fuse link shall not exceed 3 mohm.

It should be measured under the following conditions.

a) To prevent breakdown of the thin insulation on the contacts, the electromotive force of the circuit should not exceed 20 mV (DC or AC peak).

b) To prevent overheating of the contacts, the current should not exceed 1A.

The metal parts of the fuse are made of brass in addition to the springs and connectors. Brass parts for fuses and gauges for measuring contact resistance

Brass parts of the standard gauge shall have a copper content of 58% to 70%. The contacts should be silver plated.

For fuses with a rated current less than or equal to 6.3 A, fuse holders in accordance with Figure 1 shall be used. The contact force is 4N~6N. soft

The lead and terminal connecting wires shall be copper wires with a cross-sectional area of 1 mm2, and the length of the terminal connecting wires shall be approximately 500 mm.

For fuses with a rated current exceeding 6.3 A, fuse holders conforming to Figure 2 shall be used. The contact force should be 8N~12N. Soft lead

The wire and terminal connecting wires shall be copper wires with a cross-sectional area of 6 mm2, and the length of the terminal connecting wires shall be approximately 500 mm.

The breaking capacity test shall use a fuse that conforms to Figure 3 and has the same contact force and conductor cross-sectional area as the fuse holder of Figure 2.

Support.

8 size and structure

This chapter of GB/T 9364.1-2015 is applicable with the following modifications.

8.2 Structure

In the case where an "opaque" fuse is specified, a transparent envelope (housing) may be used as long as a light-shielding filler is provided.

Pass the inspection to check if it is qualified.

This section is based on the assumption that the shell material is glass, ceramic or similar non-combustible material.

For other materials, additional testing may be required.

8.3 terminal

There should be a cylindrical metal end cap at each end of the fuse link.

The outer end of the end cap should be generally straight and at right angles to the axis.

The end cap should be securely fastened to ensure that the end cap cannot be removed without damaging the fuse.

Compliance is checked by inspection and the following tests.

The sample was immersed in water at 15 ° C ~ 35 ° C for 24 h. After the sample is taken out of the water, the axial tension is evenly applied to each end cap to

5N, keep 1min.

The end cap should remain securely fastened.

Figure 4 specifies the device to which this test applies and should be used in case of dispute. The end cap does not deform when tested using the device.

8.4 Terminal alignment and shape

The end cap and housing of the fuse link should achieve reasonable alignment.

Compliance is checked using the standard gauge shown in Figure 5.

With the fuse body's own weight, the entire length of the fuse link should pass the standard gauge.

9 Electrical requirements

This chapter of GB/T 9364.1-2015 is applicable with the following modifications.

9.3 breaking capacity

9.3.1 Operating conditions

increase.

This test should use alternating current.

Figure 6 specifies the typical test circuit for the rated high breaking capacity test; Figure 7 specifies the typical test circuit for the rated low breaking capacity test.

road. Test fuse holders in accordance with Figure 3 should be used.

The typical test circuit for the rated high breaking capacity test shall have a power factor of 0.7 to 0.8. Circuit when tested at smaller expected currents

The electrical inductance remains the same and the current should only be adjusted by changing the resistance.

9.3.2 In addition to the failure criteria specified in GB/T 9364.1-2015, the fuse-link shall be able to operate satisfactorily without occurrence of each test.

List any phenomenon.

---The contacts are fused together;

--- The mark after the test is difficult to identify;

--- The perforation visible to the naked eye appears on the outer surface of the end cap.

The following phenomena can be ignored.

--- Black spots appear on the end caps;

---The end cap is slightly deformed;

--- Fused body cracks.

Table 1 List of ampere rating tests

Article number description

Fuse number

9.4a Durability Test x

9.2.2a Test at high temperature b x

9.2.1a Time-current characteristics

10IN x

4IN x

2.75IN x

2.0IN or 2.1IN x

9.3 Breaking capacity test

Rated breaking capacity

5 times rated current x

10 times rated current x

50 times rated current x

250 times rated current x

8.3 Terminal (end cap test) x x x x

8.5a solder joint x x x x x x

6.2a Marker's clarity and durability x x x x

a These article numbers are the article numbers of GB/T 9364.1-2015.

b Applicable only as specified in the standard specification sheet.

Table 2 List of maximum ampere rating tests for the same series

Article number description

Fuse number in descending order of voltage drop

13~

18~

9.4a Durability Test x

9.2.2a Test at high temperature b x

Table 2 (continued)

Article number description

Fuse number in descending order of voltage drop

13~

18~

9.2.1a Time-current characteristics

10IN x

4IN x

2.75IN x

2.0IN or 2.1IN x

9.3 Rated breaking capacity x

8.3 Terminal (end cap test) x x x x

8.5a solder joint x x x x x x

6.2a Marker's clarity and durability x x x x

a These article numbers are the article numbers of GB/T 9364.1-2015.

b Applicable only as specified in the standard specification sheet.

Table 3 List of minimum ampere rating tests for the same series

Article number description

Fuse number in descending order of voltage drop

1~6

13~

18~

9.4a Durability Test x

9.2.1a Time-current characteristics

10IN x

2.0IN or 2.1IN x

9.3 Rated breaking capacity x

a These article numbers are the article numbers of GB/T 9364.1-2015.

Figure 1 5mm x 20mm and 6.3mm x 32mm fuse link test fuse support --- rated current less than or equal to 6.3A

Figure 2 5mm x 20mm and 6.3mm x 32mm fuse fuse test fuse support --- rated current greater than 6.3A

Figure 3 Fuse support for breaking capacity test

The unit is mm

The device has three tubes (1, 2, 3) that slide inside each other within the tube.

The upper end of the outer tube (1) has an opening and a fixture capable of catching one end of the test sample.

The upper end of the middle tube (2) has a groove and a fixture that can catch the other end of the test sample.

The inner tube (3) is connected to the tube (2) by a spring (4).

The spring (4) is stretched with a knob (5) to move the tube (3) downward, at which time a steady increase in axial force acts on the tube (2) and the test sample.

The different lengths of the fuse body cap and the entire fuse link will be compensated by the sliding tube (2). The lower end (6) of the tube (2) is exposed in the observation window (7) and used as a fiducial mark.

Another mark (short line) together with the character "5N" is printed on the tube (3). Fully move the knob (5) down to align the two marks and tighten the knob (5)

position.

The screw (8) ensures that the tube (1) and tube (2) are aligned.

The test unit is in a vertical position and can be used and calibrated when the test fuse is at the top.

Figure 4 axial tensile test device

Figure 5 Standardity of Collimation

Description.

A --- movable link for calibration;

C --- switch of the circuit;

D --- power disconnect switch;

F --- tested fuse link;

S --- power supply, its impedance is less than 10% of the total impedance of the circuit;

L --- air core inductance, 0.30mH +/- 3%;

R1 --- series resistor for adjusting the expected current;

R2 --- shunt resistor (40ohm +/- 10%) as a damping resistor.

Fig.6 Typical circuit of high breaking capacity fuse breaking ability test

Description.

A --- movable link for calibration;

C --- switch of the circuit;

D --- power disconnect switch;

F --- tested fuse link;

S --- power supply, its impedance is less than 10% of the total impedance of the circuit;

R1 --- series resistor for adjusting to get the exact expected current.

Fig.7 Typical circuit for low breaking capacity and enhanced breaking capacity

10 standard specification sheet

Fuse 5mm x 20mm

Fast action, high breaking capacity

Standard specification sheet 1

page 1

The unit is mm

Collimation. The dimensions of the standard gauge are. h = 30 mm; d = (5.38 +/- 0.01) mm (see 8.4).

Structure. The fuse link should be opaque.

Rated current a

Rated voltage

Maximum voltage drop

Maximum continuous power consumption

50mA

63mA

80mA

100mA

125mA

160mA

200mA

250mA

315mA

400mA

500mA

630mA

800mA

1.25A

1.6A

2.5A

3.15A

6.3A

10A

1.6

2.5

a The intermediate value should be selected from the R20 number system in accordance with GB/T 321-2005.

b Measured after 1 h at 1.5 IN (after more than 6.3 A for 30 min).

Fuse 5mm x 20mm

Fast action, high breaking capacity

Standard specification sheet 1

page 2

Sign

The fuse link shall have the following markings.

a) rated current;

b) rated voltage;

c) the name or trademark of the manufacturer;

d) characteristic symbol F;

e) Breaking capacity symbol H.

Pre-arc time-current characteristics

The pre-arcing time should be within the following limits.

Rated current

2.1IN

maximum

2.75IN 4IN

Minimum, maximum, minimum, maximum

10IN

maximum

50mA~4A 30min 10ms 2s 3ms 300ms 20ms

Greater than 4A~6.3A 30min 10ms 3s 3ms 300ms 20ms

More than 6.3A~10A 30min 40ms 20s 10ms 1s 30ms

Breaking capacity

Rated breaking capacity. 1500A (communication during test), and use the circuit specified in Figure 6 for high breaking capacity test.

Durability test

Perform 100 cycle tests at 1.2 times rated current according to 9.4a) of GB/T 9364.1-2015, and then press

GB/T 9364.1-2015 9.4b), test 1h at 1.5 times rated current (rated value greater than 6.3A test)

30min).

Fuse 5mm x 20mm

Fast action, low breaking capacity

Standard specification sheet 2

page 1

This type of fuse is recommended for circuit protection in communication equipment or similar circuit protection that limits short circuit current.

The unit is mm

Collimation. The standard gauge size is. h = 30 mm; d = (5.38 +/- 0.01) mm (see 8.4).

Structure. The fuse-link is a transparent structure.

Rated current a

Rated voltage

Maximum voltage drop

Maximum continuous power consumption

32mA

40mA

50mA

63mA

80mA

100mA

125mA

160mA

200mA

250mA

315mA

400mA

500mA

630mA

800mA

1.25A

1.6A

2.5A

3.15A

6.3A

1.6

2.5

10A

a The intermediate value should be selected from the R20 number system in accordance with GB/T 321-2005.

b Measured after 1 h at 1.5 IN (after more than 6.3 A for 30 min).

Fuse 5mm x 20mm

Fast action, low breaking capacity

Standard specification sheet 2

page 2

Sign

The fuse link shall have the following markings.

a) rated current;

b) rated voltage;

c) the name or trademark of the manufacturer;

d) characteristic symbol F;

e) Breaking capacity symbol L.

Pre-arc time-current characteristics

The pre-arcing time should be within the following limits.

Rated current

2.1IN

maximum

2.75IN 4IN

Minimum, maximum, minimum, maximum

10IN

maximum

32mA~100mA 30min 10ms 500ms 3ms 100ms 20ms

More than 100mA~6.3A 30min 50ms 2s 10ms 300ms 20ms

More than 6.3A~10A 30min 50ms 2s 10ms 400ms 40ms

Breaking capacity

Rated breaking capacity. 35A or 10IN, whichever is larger (communication during test), and use the circuit specified in Figure 7 for low breaking

Ability test.

The rated voltage of the rated current greater than 6.3A should be 125V.

The expected fault current of the circuit should be within these limits.

Durability test

Perform 100 cycle tests at 1.2 times rated current according to 9.4a) of GB/T 9364.1-2015, and then press

GB/T 9364.1-2015 9.4b), test 1h at 1.5 times rated current (rated value greater than 6.3A test)

30min).

Fuse 5mm x 20mm

Delay action (resistance to surge)

Low breaking capacity

Standard specification sheet 3

page 1

This type of fuse is recommended for circuit protection in communication equipment or similar circuit protection that limits short circuit current.

The unit is mm

Collimation. The standard gauge size is. h = 30 mm; d = (5.38 +/- 0.01) mm (see 8.4).

Structure. The fuse-link is a transparent structure.

Rated current a

Rated voltage

Maximum voltage drop

Maximum continuous power consumption

32mA

40mA

50mA

63mA

80mA

100mA

125mA

160mA

200mA

250mA

315mA

400mA

500mA

630mA

800mA

1.25A

1.6A

2.5A

3.15A

6.3A

1.6

10A

a The intermediate value should be selected from the R20 number system in accordance with GB/T 321-2005.

b Measured after 1 h at 1.5 IN (after more than 6.3 A for 30 min).

Fuse 5mm x 20mm

Delay action (resistance to surge)

Low breaking capacity

Standard specification sheet 3

page 2

Sign

The fuse link shall have the following markings.

a) rated current;

b) rated voltage;

c) the name or trademark of the manufacturer;

d) characteristic symbol T;

e) Breaking capacity symbol L.

Pre-arc time-current characteristics

The pre-arcing time should be within the following limits.

Rated current

2.1IN

maximum

2.75IN 4IN 10IN

Minimum, maximum, minimum, maximum, minimum, maximum

32mA~100mA 2min.200ms 10s 40ms 3s 10ms 300ms

More than 100mA~10A 2min 600ms 10s 150ms 3s 20ms 300ms

Test at (70 +/- 2) °C

The fuse body is energized with 1.1IN for 1h, and the fuse body should not operate.

Breaking capacity

Rated breaking capacity. 35A or 10IN, whichever is larger (communication during test), and use the circuit specified in Figure 7 for low breaking

Ability test.

The rated voltage of the rated current greater than 6.3A should be 125V.

The expected fault current of the circuit should be within these limits.

Durability test

Perform 100 cycle tests at 1.2 times rated current according to 9.4a) of GB/T 9364.1-2015, and then press

GB/T 9364.1-2015 9.4b), test 1h at 1.5 times rated current (rated value greater than 6.3A test)

30min).

Fuse 6.3mm x 32mm

Fast action, low breaking capacity

Standard specification sheet 4

page 1

This type of fuse is recommended for circuit protection in communication equipment or similar circuit protection that limits short circuit current.

The unit is mm

Collimation. The standard gauge size is. h = 38 mm; d = (6.65 +/- 0.01) mm (see 8.4).

Structure. The fuse link should be a transparent structure.

Rated current.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 321-2005 · ISO 3.1973 · GB/T 2423.28-2005 · IEC 60068 · GB/T 2423.60-2008 · GB/T 9364.1-2015 · IEC 60127 · IEC 60249

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