GB/T 13539.1-2015Low-voltage fuses -- Part 1: General requirements (English PDF)

1.1 Scope and purpose

GB 13539 of the present section applies equipped with no less than the rated breaking capacity 6kA closed limiting fuses fuse body. The fuse Protection as a nominal voltage not exceeding 1000V AC frequency circuits or nominal voltage not exceeding 1500V DC circuit. 1)

1) rated voltage 1140V AC fuse can be performed with reference to this section. Fuses and other requirements concerning the performance is determined by the manufacturer and user.

Continued lower part of the standard in this section includes additional requirements that apply under the special conditions of the fuses.

IEC 60947-3 "Low-voltage switchgear and control equipment - Part 3. Switches, disconnectors, switch and fuse combinations" in the Fuse used should meet the requirements of this part.

Note 1. For "a" fuse, the DC performance (see 2.2.4) should be negotiated in detail by the user and manufacturer.

Note 2. The fuse for some special purpose, such as a high-frequency electric locomotive with a fuse or circuit fuse, subject to amendments and additions to the use of this section, if required to individually set another standard.

Note 3. This section does not apply to miniature fuses, miniature fuses standard IEC 60127.

The purpose of this section is to define the characteristics of the fuse or the fuse part (fuse base, load melt parts, fuse), if they have mutual Transsexual (including size, etc.), they can fuse by a fuse or parts having the same characteristics to be interchanged. For this purpose, this part of the special it relates to the following aspects.

--- Fuse characteristics.

- Ratings;

- insulation;

- temperature under normal use;

- power dissipation and acceptable power dissipation;

- Time/current characteristic;

- breaking capacity;

- chopping current characteristics and I2t characteristics.

--- To verify the type test the fuse characteristics.

--- Fuses flag.

1.2 Normative references

The following documents for the application of this document is essential. For dated references, only the edition used in this article Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 321-2005 priority number and priority number system (ISO 3. 1973, IDT) GB/T 16839.1-1997 Thermocouples - Part 1. indexing table (idtIEC 60584-1.1995) IEC 60038. 1983 IEC standard voltage (IEC standardvoltages) IEC 60050-441. 1984 International Electrotechnical Vocabulary (IEV) Chapter 441. Switchgear, control devices and fuses (InternationalElectrotechnicalVocabulary (IEV) -Chapter441. Switchgear, controlgearandfuses) Amendments 1 (2000) (Amendiment1) (2000) IEC 60269-2 Low-voltage fuses - Part 2. Supplementary requirements for fuses professional use (mainly for industrial fuse Control) sample standardized systems of fuses A to I (Low-voltagefuses-Part 2. Supplementaryrequirementsforfuses forusebyauthorizedpersons (fusesmainlyforindustrialapplication) -Examplesofstandardizedsys-temsoffusesAtoI) IEC 60269-3 Low-voltage fuses - Part 3. unskilled personnel Supplementary requirements for fuses (mainly used for household and class Like the use of fuses) examples of standardized systems of fuses A to F (Low-voltagefuses-Part 3. Supplementaryrequire-mentsforfusesforusebyunskiledpersons (fusesmainlyforhouseholdorsimilarapplication) -Ex-amplesofstandardizedsystemsoffusesAtoF) IEC 60269-4 Low-voltage fuses - Part 4. Supplementary requirements for protection of semiconductor devices fuse body (Low-voltagefuses-Part 4. Supplementaryrequirementsforfuses-linksfortheprotectionofsemiconductordevices) IEC 60269-5 Low-voltage fuses - Part 5. Low-voltage fuses Application Guide (Low-voltagefuses-Part 5. Guidance fortheapplicationoflow-voltagefuses) IEC 60364-3:1993 Electrical installations of buildings - Part 3. Assessment of general characteristics (Electricalinstalationsof buildings-Part 3. Assessmentofgeneralcharacteristics) IEC 60364-5-52:2001 Electrical installations of buildings Part 5-52. Selection and erection of electrical equipment - Wiring systems (E-lectricalinstalationsofbuildings-Part 5-52. Selectionanderectionofelectricalequipment-Wiring system) IEC 60529. 1989 provided by the housing protection (IP Code) [Degreesofprotectionprovidedbyenclosures (CodeIP)] Graphical symbols for diagrams IEC 60617 (Graphicalsymbolsfordiagrams) IEC 60664-1:2002 within low-voltage systems Insulation coordination for equipment - Part 1. Principles, requirements and tests (Insulationcoordi-nationforequipmentwithinlow-voltagesystems-Part 1. Principles, requirementsandtests) IEC 60695-2-10:2000 Fire hazard testing - Part 2-10. Test methods Glowing/hot wire based glow wire device and general test procedures (Firehazardtesting-Part 2-10. Glowing/hot-wirebasedtestmethods-Glow-wire apparatusandcommontestprocedure) IEC 60695-2-11:2000 Fire hazard testing - Part 2-11. Test methods Glowing/hot wire based on the final product Glow-wire flammability test (Firehazardtesting-Part 2-11. Glowing/hot-wirebasedtestmethods-Glow-wire flammabilitytestmethodforend-products) IEC 60695-2-12:2000 Fire hazard testing - Part 2-12. Test methods based on Glowing/hot wire burning materials Wire flammability test (Firehazardtesting-Part 2-12. Glowing/hot-wirebasedtestmethods-Glow-wire flammabilitytestmethodformaterials) IEC 60695-2-13:2000 Fire hazard testing - Part 2-13. Test methods based on Glowing/hot wire burning materials Wire ignitability test (Firehazardtesting-Part 2-13. Glowing/hot-wirebasedtestmethods-Glow-wireig-nitabilitytestmethodformaterials) ISO 478. 1974 standard size paper for the first ISO range ISO -A series without dressing (Paper-UntrimmedstocksizesfortheISO -ASeries-ISO primaryrange) ISO 593. 1974 Paper for ISO -A series of untrimmed standard sizes ISO supplementary range (Paper-UntrimmedstocksizesfortheISO -ASeries-ISO supplementaryrange) ISO 4046. 1978 Paper, board, pulp and related terms - Vocabulary Bilingual Edition (Paper, board, pulpandrelated terms-Vocabulary-Bilingualedition)

2.1 Fuse and its components

2.1.1

Fuse fuse

When the current exceeds a predetermined value sufficiently long time, by fusing one or more specially designed proportional melt breaking of this current, whereby Circuit disconnect device access. Fuses of all components to form a complete device components.

[IEV441-18-01]

2.1.2

Fuse holder Fuse base and contain a combination of the fusible element.

NOTE. If you do not need to make a clear distinction between this term part of the "fuse holders" indicates fuse-base and/or carrier melting pieces.

[IEV441-18-14]

2.1.2.1

Fuse base (fuse holder) fuse-base (fuse-mount) Fixing member fuses with contacts terminals.

[IEV441-18-02]

Note. Where appropriate cover can be used as part of the fuse bases.

2.1.2.2

Upload melting pieces fuse-carrier Fuse movable member, for the carriage with the body of the fuse.

[IEV441-18-13]

2.1.3

Fuse fuse-link

Fuse components with the melt after the fuses can be replaced.

[IEV441-18-09]

2.1.4

Fuse contact Two or guaranteed between fuse and fuse holder corresponding electrical continuity or more conductive member.

2.1.5

Melt fuse-element

The time when the conditions of the current exceeds a predetermined value after a predetermined melting fuse components.

[IEV441-18-08]

Note. The fuse may comprise several parallel melt.

2.1.6

Indicating device (indicator) indicatingdevice (indicator) Indicates whether the fuse fuse components operation.

[IEV441-18-17]

2.1.7

Striker

Mechanical devices fuse body. When the release operation of the fuse energy required to cause the operation of other devices or indicator, or provide Interlock.

[IEV441-18-18]

2.1.8

Terminal

An external circuit for electrically connecting the conductive portion of the fuse.

Note. Terminals can be connected according to the type of circuit to distinguish between (such as the main terminals, grounding terminals, etc.) can also be distinguished according to structure (such as a screw-type connection Wire terminals, plug-in terminals, etc.).

2.1.9

Analog fuse dummyfuse-link Having a predetermined size and power dissipation of the fuse of the test.

2.1.10

Test base testrig

Predetermined test the fuse base.

2.1.11

Standard gauge-piece stopper in order to achieve some degree of non-interchangeable accessory fuse base.

2.1.12

Hinge carrier melting pieces linkedfuse-carrier Mechanically with the carrier melt fuse base hinge member, giving a certain fuse insertion and removal operation.

2.2 General terms

2.2.1

Enclosed fuse enclosedfuse-link the melt is completely closed when the fuse in the nominal range, will not produce any harmful external effects (eg due to arcing and gas release or flames or metal particles) fuse.

[IEV441-18-12]

2.2.2

Limiting fuse current-limitingfuse-link Within a predetermined current range, the fuse fuse, so that the current is limited to be significantly lower than the expected peak current of fuse.

[IEV441-18-10]

2.2.3

"G" fuse-links (full-range breaking capacity fuse links, formerly known as general purpose fuse) "g" fuse-link (ful-rangebreaking-capacityfuse-link, formerlygeneralpurposefuse-link) Under specified conditions, to the breaking of the melt to the melting current Rated breaking capacity limit of all current flow between the fuse.

2.2.4

"A" fuse (Part range breaking capacity fuse links, formerly known as back-up fuse) "a" fuse-link (partial-rangebreaking-capacityfuse-link, formerlyback-upfuse-link) Under specified conditions, to breaking are shown in fuse fusing time - minimum current (Figure 2 k2In) to the rated current characteristic curve breaking Limit the ability of all current flow between the fuse.

NOTE. "a" fuse usually for short circuit protection. When needed less than k2In overcurrent protection, "a" fuse must be separable from other such small overcurrent Suitable for use with electrical switch streams.

2.2.5 Temperature

2.2.5.1

Ambient air temperature Ta the temperature is from the fuse or fuse housing (if any) about 1m at the ambient air temperature.

2.2.5.2

Fluid Ambient temperature fluidenvironmenttemperature Te the temperature is cooled fuse components (contacts, terminals, etc.) of the fluid temperature. If the fuse member mounted in the housing, then Te Zhou Ambient air temperature Ta and the temperature of the fluid inside the fuse parts (contacts, terminals, etc.) of the contact (with respect to the ambient air temperature) deltaTe Sum. If the fuse component is not installed in the housing, it is considered equal to Te Ta.

2.2.5.3

Fuse components temperature fuse-componenttemperature Fuse components (contacts, terminals, etc.) temperature T is temperature related components.

2.2.6

Overcurrent selectivity overcurrentdiscrimination Two or more related properties over current protection devices between the mating. When within a given range of overcurrent, specified in this it means the operation of a range of motion, while the other does not operate.

2.2.7

Fuse Systems fuse-system it follows the same design principles in the physical shape of the fuse, contact type etc. fuse family.

2.2.8

Size size

Fuse system defined set of fuse sizes, each size comprising a given rated current range that the fuse size constant.

2.2.9

The same fuse series homogeneousseriesoffuse-links Given the size of the fuse within the category, only slightly different characteristics for a given test, as long as the test one or a few Specific fuse fuse can be representative of the same series.

Note. the same series of fuse characteristics may differ and should be verified. Differences verified details of these characteristics specified in the relevant test (see Table 12 and Table

[IEV441-18-34, as amended] 2.2.10 (The fuse) Utilization category (ofafuse-link) Comprehensive requirements. These requirements and fuse protection to achieve its purpose related conditions, and represent the practical application of a set of special Sex (see 5.7.1).

2.2.11

Fuses used full-time staff (formerly known as industrial fuses) fusesforusebyauthorizedpersons (formerly caledfusesforindustrialapplication) the only full-time staff can approach only by a full-time staff and replace fuses.

Note 1. The structure does not have to take measures to ensure the non-interchangeability and to prevent accidental contact with live parts.

Note 2. The full-time staff should be IEC 60364-3 significance in BA4 3) under the category "guided by the staff" 2) and BA5 "skilled" to understand.

2) under the direction of personnel. in or under the guidance of skilled care personnel to avoid electric shock (such as operation and maintenance personnel).

3) Skilled workers. with technical knowledge or sufficient operating experience, to avoid risk of electric shock staff (engineers and technicians).

2.2.12

Fuse use by unskilled persons (formerly known as household or similar use fuses) fuseforusebyunskiledpersons (for-merlycaledfusesfordomesticandsimilar) Unskilled personnel can approach and can be replaced by a non-skilled fuse.

Note. For this type of fuse, should be protected from direct contact with live parts, if necessary, may request non-interchangeable.

2.2.13

Non-interchangeability of non-interchangeability Restrictions on the shape and (or) size, so as not to inadvertently use electrical performance in a particular fuse base different from the predetermined protection Class fuse.

[IEV441-18-33]

2.3 Characteristic value

2.3.1.

Rating

Generic term for the value of design features, and it defines the working conditions, the working conditions and equipment design as a test basis.

[IEV441-18-36]

Note. Low-voltage fuses usually provide rating. voltage, current, breaking capacity, power dissipation and acceptable power dissipation, frequency (if applicable). In the exchange of information the rated voltage and rated current rms symmetrical; in the DC case, when the ripple exists, the average rated voltage, rated current rms.

If not otherwise specified, the above-mentioned provision applies to any voltage and current values.

2.3.2

(With fuses and circuit-related) prospective current (ofacircuitandwithrespecttoafuse) Assumed fuse circuit in each pole by a negligible impedance wire replaced when the current flowing through the circuit.

For exchanges, the prospective current effective value of an AC component.

Note. The current is expected to fuse breaking capacity and characteristics [such as I2t and cut-off current characteristics (see 8.5.7)] of the reference amount.

[IEV441-17-01, as amended] 2.3.3 Threshold gate the fuses limit; within this limit range, a fuse characteristics, such as time - current characteristic.

2.3.4

Breaking capacity fuse breakingcapacityofafuse in the use and performance of specified conditions, the fuse at a predetermined current value can be expected under the breaking voltage.

[IEV441-17-08, as amended] 2.3.5 Breaking range Breaking capacity fuse is guaranteed current value of the expected range.

2.3.6

Cut off the current cut-offcurrent the maximum instantaneous value of the current during the breaking fuse achieved, thereby preventing current reaches the maximum value.

2.3.7

Chopping current characteristic cut-offcurrentcharacteristic Let-through current characteristic in the fuse specified conditions, as a function of the prospective current cut-off current curve.

Note. In the case of ac, the maximum cut-off current is asymmetric any degree attainable; At DC, the current is cut off at a predetermined time constant Under the maximum number reached.

[IEV441-17-14]

2.3.8

Peak withstand current (fuse support member) (ofafuse-holder) Chopping current fuse holders can bear.

Note. The peak withstand current is not less than the maximum cut-off current and fuse holders equipped with any of the fuse body.

2.3.9

Arcing time pre-arcing...