This standard specifies the definitions of terms related to products, components, characteristic parameters and tests of AC high-voltage fuses. This standard is applicable to the terms related to 3kV and above AC high-voltage fuses and is used for the formulation of standards, compilation and translation of technical documents, etc. GB/T 15166.1-1994 Terminology of AC high-voltage fuses GB/T15166.1-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Alternating-current high-valtage fusesTerminology
GB/T 15166. 1 - 94
This standard refers to the International Electrotechnical Commission (IEC) publications 291 and 291A Fuse Definitions (1969, 1975 editions), 282-1 Current-Limiting Fuses (1985 edition), 282-2 Ejection and Similar Fuses (1970 edition) and IEC50 No. 441 Switchgear, Controlgear and Fuses (1984 edition) and other international standards. 1 Subject Content and Scope of Application
This standard specifies the definitions of terms such as products, components, characteristic parameters and tests of AC high-voltage fuses. This standard applies to the terms related to AC high-voltage fuses of 3kV and above, and is used for the formulation of standards, compilation and translation of technical data, etc. 2 Products and structural components
2.1 Fuse
When the current exceeds the specified value for a certain period of time, the heat generated by itself will cause the fuse to melt and break the circuit. Current-limiting fuse 2.2
When operating within the specified current range, it limits the current to a level lower than the expected current peak value by its own function.
2.3 Ejection fuse Expulsion fuse A fuse that extinguishes the arc by generating a gas jet from the arc energy. 2.4 Load switch fuse combination switch-fus combination A switchgear that combines each pole of the load switch with one or more fuse curtains. 2.5 Disconnector fuse Disconnector fuse A fuse with the insulation performance of an isolating switch between contacts formed by a fuse or a fuse carrier. 2.6 Drop-aut fuse After the fuse carrier is operated, it automatically drops to form a fuse break. 2.7 General fuse
Under the specified conditions of use and performance, it can break the fuse from the rated maximum breaking current to the fuse melting current within 1h or slightly longer.
2.8 Back-up fuse,
Under the specified conditions of use and performance, it can break the fuse from the rated maximum breaking current to the rated minimum breaking current. The backup fuse is usually combined with other equipment (such as contactors). 2.9 Full range fuse full range fuse Under the specified conditions of use and performance, it can break the fuse from all fuse melting currents to the rated maximum breaking current. 2.10 Homogeneous series (of fuse-links) Approved by the State Administration of Technical Supervision on August 12, 1994 and implemented on February 1, 1995
GB/T15166.1-94
A series of fuse-links with different rated currents, the same other main characteristics and parameters, and certain structural features that allow regular changes. In a given test, a certain number of specific fuse-links are taken as representatives of the same series for testing. Note: The relevant standards will specify the characteristics of fuse-links that can change in the same series, the selection of the specific fuse-links to be tested, and the test contents involved. Single capacitor fuse capacitorunit fuse2.11
A fuse used to protect a single capacitor that constitutes a capacitor bank. Capacitor bank fusecapacitorbank fuse2. 12
A fuse set between the system and the capacitor bank (set) for total protection. Terminal
The conductive part of a fuse used to connect to an external circuit (see Figure 1, Figure 2). Note: Terminals can be distinguished by the nature of the circuit (such as main terminal, grounding terminal, etc.) or by structure (such as threaded terminal, plug terminal, etc.). Use-element
The part of the fuse that melts within a predetermined time when a certain current value is exceeded as determined by the design (see Figure 1, Figure 2). 2.15
5 Fuse-link
The fuse component including the fuse that needs to be replaced after the fuse is actuated (see Figure 1, Figure 2). 2.16
5 Arc-extinguishing tube arc-extinguishing lube The tubular part used to extinguish the arc of the fuse (see Figure 1, Figure 2). 2.17 Fuse-carrier
The movable part of a fuse that carries the fuse (see Figure 1, Figure 2). (Wiring>Terminal
Bump out relay or indicating deviceWww.bzxZ.net
Connection
Fuse
Start breaking
Screener bottom contact
Fuse contact
Breaker bottom health
1Current limiting fuse
GB/T15166.1-94
Wiring"Terminal
Fuse
Shape strong kidney
Cutting fusibility
Carrier contact
Breaker base sensitive head
Fuse base
Figure 2 Ejection fuse
2.18 Carrier fuse contact fuse-carrier contact The contact part of the fuse-link that engages with the fuse base contact (see Figure 1 and Figure 2). 2.19 Fuse-link contact The contact part of the fuse that engages with the fuse base contact or the fuse-link contact. 2.20 Fuse-base (fuse-mounting seat) fuse-base (fuse-rnount) The fixed part of the fuse equipped with contacts and terminals (see Figure 1 and Figure 2). 2.21
Fuse-base contact The contact part of the fuse base that engages with the fuse-link or fuse contact (see Figure 1 and Figure 2). 2-22 Isolating distance (for a fuse) 2.24 Striker
A mechanical device of a fuse. It releases energy after the fuse is actuated, causing other electrical appliances or indicators to actuate, or provides interlocking (see Figures 1 and 2).
2.25 Expendable cap
GB/T 15166.194
Replaceable component or assembly with closed fuse-carrying end and pressure-sensitive element. When the pressure in the fuse-carrying part exceeds the predetermined value when the fuse is breaking the circuit, the pressure-sensitive part will operate to relieve (or release) the pressure in the fuse-carrying part (see Figure 1 and Figure 2). 2.26 Refill-unit
A set of replaceable components used to restore the fuse to its original state after operation. Replaceable fuse-link renewablefuse-link 2.27
A fuse that can be restored to work by a refill unit after operation. 3 Characteristic parameters
3.1 Rated value
A value generally specified by the manufacturer for a component, device or equipment under specified operating conditions. Note: The rated values ​​usually determined for fuses are: voltage, current, and breaking current. Prospective current (of circuit and with repeat to afuse) 3.2
The current flowing in the circuit when the fuse is replaced by a conductor with negligible impedance. 3.3 Prospective peak current prospectivepeakcurent The peak value of the first large half-wave of the prospective current that appears immediately after the start of the transient process. Note: This definition is defined as the ideal switching device connecting the current, that is, the impedance changes from infinity to zero, and the peak value of one pole and the other pole may not be the same. It depends on the phase of the voltage at the moment when the current appears:
3.4 ​​Prospective breaking current prospectivehreakingcurrent The prospective current measured during the arcing interval corresponding to the breaking process. Note: For fuses, this moment is often defined as the starting moment of the breaking process, and the meaning of the arcing interval is specified in the respective standards. 3.5 Cut-off current, let-through current The instantaneous value of the maximum current that appears when the fuse is broken. Note that this statement is particularly important when the fuse operates before the expected peak current of the circuit is reached. 3.6 Breaking capacity The expected current value that the fuse can break at a given voltage under the specified conditions of use and performance. Rated maximum breaking current rated maximum breaking current 3.7
The value of the specified breaking capacity of the fuse. 3.8 Rated minimum breaking current rated minimum breaking current The specified minimum breaking current value of the fuse. Usually the backup fuse has this parameter. 3.9 Minimum breaking current minimum breaking current The minimum expected current that the fuse can break at the specified voltage under the specified conditions of use and performance. 3.10 Capacitive breaking current capacitive breaking cutrent The current in the process of breaking a capacitor or capacitor bank (set) under the specified conditions of use and performance. 3.11 Pre-arcing time pre-arcing time; melting time melting time specifies the time interval from the melting of the fuse to the arc appearing when a certain current value is applied to the fuse. 3.12 Arcing time arcing time
The time interval from the arc appearing in the fuse to the moment when the arc is extinguished. 3 Operating time operating time breaking time clearing time 3-13
The sum of pre-arcing time and arcing time.
3.14 Joule integral (1\t) Joule integral (1t) The integral of the square of the current in a given time interval. r
GB/T15166.1---94
Note: (before I is the integral of the pre-shift time of the fuse. ② Action\t is the integral of the fuse action time. ③ In the circuit protected by the fuse, the energy released by 1 ohm (10) resistance expressed in joules is equal to the action value expressed in A\s. 3.15 Virlual time
The joule integral value is divided by the square of the expected current. Note: The valid time value usually specified for a fuse is the value of the pre-arcing time or the action time. 3.16 Time-current characteristic time-current characteristic Under specified action conditions, the function curve of time (such as pre-arcing time or action time) and expected current. 3.17 Tut-off current characteristic: let-through cuttent characleristic
The function of the cut-off current and the prospective current under specified operating conditions. Note: If it is AC, it can be the cut-off current at any asymmetrical maximum value. If it is DC, it is the maximum cut-off current related to the specified time constant.
3-18 Recovery voltage
rccaveryvoitage
The voltage that appears between the two terminals after the fuse opens. Note: This voltage can be considered as two consecutive sections, the first is the decompression recovery voltage, and the second is the frequency recovery voltage. 3.19 Characteristic I'tcharacteristic
The Joule integral (Y\t) value as a function of the prospective current under specified conditions. Note: The F characteristic is usually specified in relation to the pre-arcing time, and the voltage is used as a reference when appropriate. 3.20 Overload characteristic (overload characteristic of the fuse) The ability of the fuse to repeatedly withstand the combined effects of time and current (exceeding the rated current) under specified use and performance conditions. 3.21 Time-current zone time-currcntzone The zone of the pre-arcing or operating time-current characteristic determined under specified conditions of use. 3.22 Time-current zone limits tine-current zone limits The specified limits of the time-current zone of the fuse given in the relevant standards. NOTE These limits take into account the manufacturing tolerances of the industry and the design deviations between factories. They do not take into account the influence of environmental conditions. 3.23 Melting factor fusefactor
The ratio of the corresponding current in the pre-arcing time-current characteristic for a specified time to the rated current of the fuse. Conventional non-fusing current 3.24
The specified current value that the fuse can carry without melting within a specified time (conventional time). 3.25
Conventional melting current conventionalal fuse currcntThe specified current value that can make the fuse melt within the specified time (agreed time). 5 Arc voltage peak arcvoltagepeak
Under specified conditions, the maximum instantaneous value of the voltage appearing on the fuse terminals when arcing. 7 Transient recovery voltage (abbreviation TRV) transientrecaveryvoltage(abbreviviatinnTRV)3.27
Recovery voltage within the transient characteristic time. Note: This voltage depends on the circuit and fuse characteristics. It can be oscillating or non-oscillating, or a combination of both. In a three-phase circuit, if otherwise specified, this voltage refers to the voltage on the first open pole. 3L frequency recovery voltage powerfrequencyrecoveryvoltage3.28
Recovery voltage after the transient voltage phenomenon subsides. Prospective transient recuveryvoltage(of a circuit) 3.29
The transient recovery voltage after the prospective current without DC component is interrupted by a Li Mao switching device. Note: The definition assumes that the transient recovery voltage is obtained by replacing the fuse with an ideal switching device, that is, its zero-current (i.e., the "natural" current zero point) instantaneous gap impedance changes suddenly from zero to zero. For three-phase circuits, the definition also assumes that the interruption of the current in the ideal switch tube only occurs at the first opened pole. GB/T 15166.1-94
3.30 Switching overvoltage switchingovervoltageag The maximum instantaneous voltage that appears on its terminal during the fuse breaking process. Note: The switching overvoltage can be the peak value of the arc voltage or the voltage occurring during the incubation recovery voltage time. 3.31 Power loss (of the fuse) powerdisipation(ofa The power released by a fuse-link when it carries a specified current value under the specified conditions of use and performance. Note: The specified conditions of use and performance usually include a constant effective value of the current before reaching stable temperature conditions. 3.32 Power acceptance of a fuse-base (fuse-holder) Power acceptance of a fuse-base (fuse-holder) Under specified conditions, the fuse base (fuse holder) can withstand the maximum value of the power released in the fuse. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China and is under the jurisdiction of the National Technical Committee for Standardization of High Voltage Switchgear. This standard was drafted by the Xi'an High Voltage Electrical Equipment Research Institute. The main drafters of this standard are Hou Zhongji, Wang Jimei, Chen Fuqing, and Tang Kewei12 Arcing time arcingtime
The time interval from the moment an arc appears in a fuse to the moment the arc is extinguished. 3 Operating time operating time breaking time clearingtime3-13
The sum of pre-arcing time and arcing time.
3.14 Joule integral (1\t) Joule integral (1t) The integral of the square of the current in a given time interval. r
GB/T15166.1---94
Note: (before I is the integral of the pre-shift time of the fuse. ② Action\t is the integral of the fuse action time. ③ In the circuit protected by the fuse, the energy released by 1 ohm (10) resistance expressed in joules is equal to the action value expressed in A\s. 3.15 Virlual time
The joule integral value is divided by the square of the expected current. Note: The valid time value usually specified for a fuse is the value of the pre-arcing time or the action time. 3.16 Time-current characteristic time-current characteristic Under specified action conditions, the function curve of time (such as pre-arcing time or action time) and expected current. 3.17 Tut-off current characteristic: let-through cuttent characleristic
The function of the cut-off current and the prospective current under specified operating conditions. Note: If it is AC, it can be the cut-off current at any asymmetrical maximum value. If it is DC, it is the maximum cut-off current related to the specified time constant.
3-18 Recovery voltage
rccaveryvoitage
The voltage that appears between the two terminals after the fuse opens. Note: This voltage can be considered as two consecutive sections, the first is the decompression recovery voltage, and the second is the frequency recovery voltage. 3.19 Characteristic I'tcharacteristic
The Joule integral (Y\t) value as a function of the prospective current under specified conditions. Note: The F characteristic is usually specified in relation to the pre-arcing time, and the voltage is used as a reference when appropriate. 3.20 Overload characteristic (overload characteristic of the fuse) The ability of the fuse to repeatedly withstand the combined effects of time and current (exceeding the rated current) under specified use and performance conditions. 3.21 Time-current zone time-currcntzone The zone of the pre-arcing or operating time-current characteristic determined under specified conditions of use. 3.22 Time-current zone limits tine-current zone limits The specified limits of the time-current zone of the fuse given in the relevant standards. NOTE These limits take into account the manufacturing tolerances of the industry and the design deviations between factories. They do not take into account the influence of environmental conditions. 3.23 Melting factor fusefactor
The ratio of the corresponding current in the pre-arcing time-current characteristic for a specified time to the rated current of the fuse. Conventional non-fusing current 3.24
The specified current value that the fuse can carry without melting within a specified time (conventional time). 3.25
Conventional melting current conventionalal fuse currcntThe specified current value that can make the fuse melt within the specified time (agreed time). 5 Arc voltage peak arcvoltagepeak
Under specified conditions, the maximum instantaneous value of the voltage appearing on the fuse terminals when arcing. 7 Transient recovery voltage (abbreviation TRV) transientrecaveryvoltage(abbreviviatinnTRV)3.27
Recovery voltage within the transient characteristic time. Note: This voltage depends on the circuit and fuse characteristics. It can be oscillating or non-oscillating, or a combination of both. In a three-phase circuit, if otherwise specified, this voltage refers to the voltage on the first open pole. 3L frequency recovery voltage powerfrequencyrecoveryvoltage3.28
Recovery voltage after the transient voltage phenomenon subsides. Prospective transient recuveryvoltage(of a circuit) 3.29
The transient recovery voltage after the prospective current without DC component is interrupted by a Li Mao switching device. Note: The definition assumes that the transient recovery voltage is obtained by replacing the fuse with an ideal switching device, that is, its zero-voltage (i.e., the "natural" current zero point) instantaneous gap impedance changes suddenly from zero to zero. For three-phase circuits, the definition also assumes that the interruption of the current in the ideal switch tube only occurs at the first opened pole. GB/T 15166.1-94
3.30 Switching overvoltage switchingovervoltageag The maximum instantaneous voltage that appears on its terminal during the fuse breaking process. Note: The switching overvoltage can be the peak value of the arc voltage or the voltage occurring during the incubation recovery voltage time. 3.31 Power loss (of the fuse) powerdisipation(ofa The power released by a fuse-link when it carries a specified current value under the specified conditions of use and performance. Note: The specified conditions of use and performance usually include a constant effective value of the current before reaching stable temperature conditions. 3.32 Power acceptance of a fuse-base (fuse-holder) Power acceptance of a fuse-base (fuse-holder) Under specified conditions, the fuse base (fuse holder) can withstand the maximum value of the power released in the fuse. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China and is under the jurisdiction of the National Technical Committee for Standardization of High Voltage Switchgear. This standard was drafted by the Xi'an High Voltage Electrical Equipment Research Institute. The main drafters of this standard are Hou Zhongji, Wang Jimei, Chen Fuqing, and Tang Kewei12 Arcing time arcingtime
The time interval from the moment an arc appears in a fuse to the moment the arc is extinguished. 3 Operating time operating time breaking time clearingtime3-13
The sum of pre-arcing time and arcing time.
3.14 Joule integral (1\t) Joule integral (1t) The integral of the square of the current in a given time interval. r
GB/T15166.1---94
Note: (before I is the integral of the pre-shift time of the fuse. ② Action\t is the integral of the fuse action time. ③ In the circuit protected by the fuse, the energy released by 1 ohm (10) resistance expressed in joules is equal to the action value expressed in A\s. 3.15 Virlual time
The joule integral value is divided by the square of the expected current. Note: The valid time value usually specified for a fuse is the value of the pre-arcing time or the action time. 3.16 Time-current characteristic time-current characteristic Under specified action conditions, the function curve of time (such as pre-arcing time or action time) and expected current. 3.17 Tut-off current characteristic: let-through cuttent characleristic
The function of the cut-off current and the prospective current under specified operating conditions. Note: If it is AC, it can be the cut-off current at any asymmetrical maximum value. If it is DC, it is the maximum cut-off current related to the specified time constant.
3-18 Recovery voltage
rccaveryvoitage
The voltage that appears between the two terminals after the fuse opens. Note: This voltage can be considered as two consecutive sections, the first is the decompression recovery voltage, and the second is the frequency recovery voltage. 3.19 Characteristic I'tcharacteristic
The Joule integral (Y\t) value as a function of the prospective current under specified conditions. Note: The F characteristic is usually specified in relation to the pre-arcing time, and the voltage is used as a reference when appropriate. 3.20 Overload characteristic (overload characteristic of the fuse) The ability of the fuse to repeatedly withstand the combined effects of time and current (exceeding the rated current) under specified use and performance conditions. 3.21 Time-current zone time-currcntzone The zone of the pre-arcing or operating time-current characteristic determined under specified conditions of use. 3.22 Time-current zone limits tine-current zone limits The specified limits of the time-current zone of the fuse given in the relevant standards. NOTE These limits take into account the manufacturing tolerances of the industry and the design deviations between factories. They do not take into account the influence of environmental conditions. 3.23 Melting factor fusefactor
The ratio of the corresponding current in the pre-arcing time-current characteristic for a specified time to the rated current of the fuse. Conventional non-fusing current 3.24
The specified current value that the fuse can carry without melting within a specified time (conventional time). 3.25
Conventional melting current conventionalal fuse currcntThe specified current value that can make the fuse melt within the specified time (agreed time). 5 Arc voltage peak arcvoltagepeak
Under specified conditions, the maximum instantaneous value of the voltage appearing on the fuse terminals when arcing. 7 Transient recovery voltage (abbreviation TRV) transientrecaveryvoltage(abbreviviatinnTRV)3.27
Recovery voltage within the transient characteristic time. Note: This voltage depends on the circuit and fuse characteristics. It can be oscillating or non-oscillating, or a combination of both. In a three-phase circuit, if otherwise specified, this voltage refers to the voltage on the first open pole. 3L frequency recovery voltage powerfrequencyrecoveryvoltage3.28
Recovery voltage after the transient voltage phenomenon subsides. Prospective transient recuveryvoltage(of a circuit) 3.29
The transient recovery voltage after the prospective current without DC component is interrupted by a Li Mao switching device. Note: The definition assumes that the transient recovery voltage is obtained by replacing the fuse with an ideal switching device, that is, its zero-voltage (i.e., the "natural" current zero point) instantaneous gap impedance changes suddenly from zero to zero. For three-phase circuits, the definition also assumes that the interruption of the current in the ideal switch tube only occurs at the first opened pole. GB/T 15166.1-94
3.30 Switching overvoltage switchingovervoltageag The maximum instantaneous voltage that appears on its terminal during the fuse breaking process. Note: The switching overvoltage can be the peak value of the arc voltage or the voltage occurring during the incubation recovery voltage time. 3.31 Power loss (of the fuse) powerdisipation(ofa The power released by a fuse-link when it carries a specified current value under the specified conditions of use and performance. Note: The specified conditions of use and performance usually include a constant effective value of the current before reaching stable temperature conditions. 3.32 Power acceptance of a fuse-base (fuse-holder) Power acceptance of a fuse-base (fuse-holder) Under specified conditions, the fuse base (fuse holder) can withstand the maximum value of the power released in the fuse. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China and is under the jurisdiction of the National Technical Committee for Standardization of High Voltage Switchgear. This standard was drafted by the Xi'an High Voltage Electrical Equipment Research Institute. The main drafters of this standard are Hou Zhongji, Wang Jimei, Chen Fuqing, and Tang Kewei22 Time-current zone limits tine-current zone limits The specified limits of the time-current zone of a fuse given in the relevant standards. NOTE These limits take into account the manufacturing tolerances of the industry and the design deviations between factories. They do not take into account the influence of environmental conditions. 3.23 Melting factor fusefactor
The ratio of the corresponding current in the pre-arcing time-current characteristic for a specified time to the rated current of the fuse. Conventional non-fusing current 3.24
The specified current value that a fuse can carry without melting within a specified time (conventional time). 3.25
Conventional melting current conventionalal fuse currcntThe specified current value that can make the fuse melt within the specified time (agreed time). 5 Arc voltage peak arcvoltagepeak
Under specified conditions, the maximum instantaneous value of the voltage appearing on the fuse terminals when arcing. 7 Transient recovery voltage (abbreviation TRV) transientrecaveryvoltage(abbreviviatinnTRV)3.27
Recovery voltage within the transient characteristic time. Note: This voltage depends on the circuit and fuse characteristics. It can be oscillating or non-oscillating, or a combination of both. In a three-phase circuit, if otherwise specified, this voltage refers to the voltage on the first open pole. 3L frequency recovery voltage powerfrequencyrecoveryvoltage3.28
Recovery voltage after the transient voltage phenomenon subsides. Prospective transient recuveryvoltage(of a circuit) 3.29
The transient recovery voltage after the prospective current without DC component is interrupted by a Li Mao switching device. Note: The definition assumes that the transient recovery voltage is obtained by replacing the fuse with an ideal switching device, that is, its zero-voltage (i.e., the "natural" current zero point) instantaneous gap impedance changes suddenly from zero to zero. For three-phase circuits, the definition also assumes that the interruption of the current in the ideal switch tube only occurs at the first opened pole. GB/T 15166.1-94
3.30 Switching overvoltage switchingovervoltageag The maximum instantaneous voltage that appears on its terminal during the fuse breaking process. Note: The switching overvoltage can be the peak value of the arc voltage or the voltage occurring during the incubation recovery voltage time. 3.31 Power loss (of the fuse) powerdisipation(ofa The power released by a fuse-link when it carries a specified current value under the specified conditions of use and performance. Note: The specified conditions of use and performance usually include a constant effective value of the current before reaching stable temperature conditions. 3.32 Power acceptance of a fuse-base (fuse-holder) Power acceptance of a fuse-base (fuse-holder) Under specified conditions, the fuse base (fuse holder) can withstand the maximum value of the power released in the fuse. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China and is under the jurisdiction of the National Technical Committee for Standardization of High Voltage Switchgear. This standard was drafted by the Xi'an High Voltage Electrical Equipment Research Institute. The main drafters of this standard are Hou Zhongji, Wang Jimei, Chen Fuqing, and Tang Kewei22 Time-current zone limits tine-current zone limits The specified limits of the time-current zone of a fuse given in the relevant standards. NOTE These limits take into account the manufacturing tolerances of the industry and the design deviations between factories. They do not take into account the influence of environmental conditions. 3.23 Melting factor fusefactor
The ratio of the corresponding current in the pre-arcing time-current characteristic for a specified time to the rated current of the fuse. Conventional non-fusing current 3.24
The specified current value that a fuse can carry without melting within a specified time (conventional time). 3.25
Conventional melting current conventionalal fuse currcntThe specified current value that can make the fuse melt within the specified time (agreed time). 5 Arc voltage peak arcvoltagepeak
Under specified conditions, the maximum instantaneous value of the voltage appearing on the fuse terminals when arcing. 7 Transient recovery voltage (abbreviation TRV) transientrecaveryvoltage(abbreviviatinnTRV)3.27
Recovery voltage within the transient characteristic time. Note: This voltage depends on the circuit and fuse characteristics. It can be oscillating or non-oscillating, or a combination of both. In a three-phase circuit, if otherwise specified, this voltage refers to the voltage on the first open pole. 3L frequency recovery voltage powerfrequencyrecoveryvoltage3.28
Recovery voltage after the transient voltage phenomenon subsides. Prospective transient recuveryvoltage(of a circuit) 3.29
The transient recovery voltage after the prospective current without DC component is interrupted by a Li Mao switching device. Note: The definition assumes that the transient recovery voltage is obtained by replacing the fuse with an ideal switching device, that is, its zero-voltage (i.e., the "natural" current zero point) instantaneous gap impedance changes suddenly from zero to zero. For three-phase circuits, the definition also assumes that the interruption of the current in the ideal switch tube only occurs at the first opened pole. GB/T 15166.1-94
3.30 Switching overvoltage switchingovervoltageag The maximum instantaneous voltage that appears on its terminal during the fuse breaking process. Note: The switching overvoltage can be the peak value of the arc voltage or the voltage occurring during the incubation recovery voltage time. 3.31 Power loss (of the fuse) powerdisipation(ofa The power released by a fuse-link when it carries a specified current value under the specified conditions of use and performance. Note: The specified conditions of use and performance usually include a constant effective value of the current before reaching stable temperature conditions. 3.32 Power acceptance of a fuse-base (fuse-holder) Power acceptance of a fuse-base (fuse-holder) Under specified conditions, the fuse base (fuse holder) can withstand the maximum value of the power released in the fuse. Additional notes:
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China and is under the jurisdiction of the National Technical Committee for Standardization of High Voltage Switchgear. This standard was drafted by the Xi'an High Voltage Electrical Equipment Research Institute. The main drafters of this standard are Hou Zhongji, Wang Jimei, Chen Fuqing, and Tang Kewei
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.