JB/T 7114-1993 Method for compiling product models of power capacitors
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Method for compiling the model of power capacitor products
Subject content and scope of application
JB/T7114-93
Replaces ZBK
This standard specifies the method for compiling the model of a single power capacitor (hereinafter referred to as "single capacitor" or "capacitor") and a power capacitor device (hereinafter referred to as "capacitor device" or "device"). This standard applies to the compilation of the model of a single capacitor and a capacitor device. 2 Terminology
2.1 (Single) capacitor
An assembly mainly composed of one or more capacitor elements or units assembled in a single housing and having lead terminals. 2.2 (Capacitor) device
An assembly with a capacitor as the main body and other supporting equipment that can independently complete the predetermined function. 3 Model representation method||tt ||3.1 Method of indicating the model of a single capacitor
1 The model consists of a series code, an impregnated medium code, a solid medium code, a design serial number, a first characteristic number, a second characteristic number, a third characteristic number and a footnote number. Its form is as follows: 口口
3.1.1 Series code
Footnote number
Third characteristic number
Second pending number
First pending number
Design serial number
Solid medium code
Immersed medium code
Series code
Used to indicate the series to which the capacitor belongs, and is represented by a capital Chinese pinyin letter. The meaning of the letter is shown in Table 1. Approved by the Ministry of Machinery Industry on October 8, 1993
Implemented on January 1, 1994
Series code
Impregnated medium code
JB/T 7114 -- 93
Table 1 Capacitor Series Codes and Their Meanings
Letter Meaning
AC Filter Capacitor
Shunt Capacitor
Series Capacitor
DC Filter Capacitor
Cross-washing Motor Capacitor
Protection Capacitor
Circuit Breaker Capacitor
Series Code
Letter Meaning
Pulse Capacitor
Coupling Capacitor
Electrothermal Capacitor
Resonant Capacitor
Standard Capacitor
DC Capacitor
Used to indicate the type of impregnated dielectric in the capacitor, with a capital Chinese Pinyin Indicated by letters, the meaning of letters is shown in Table 2. Table 2 Impregnation medium code and its meaning
Impregnation medium code
Rate meaning
Cyanine toluene
Isopropyl biphenylwwW.bzxz.Net
Sesame oil
Diaryl ethane
Impregnation medium code
Note: When the impregnation medium is a mixture of several impregnation mediums, only the code of the main impregnation medium is indicated. Solid medium code
Letter containing
Sulfur hexafluoride
Alkyl benzene
Mineral oil
Rapeseed oil
Used to indicate the form of solid medium in capacitors, represented by a capital Chinese pinyin letter, the meaning of the letter is shown in Table 3. Table 3 Solid dielectric code and its meaning
Surround dielectric code
When the solid dielectric is all paper, the solid dielectric is not indicated by letters. Note: ?
②Y series standard capacitors do not have solid dielectric codes. ②Metallic capacitors are indicated by adding the letter " after the solid dielectric code. Assembled capacitors are indicated by adding the letter H after the solid dielectric code. 3.1.4Design serial number
Letter meaning
Film-paper composite
Used to distinguish different sizes of a series of products (such as installation size, etc.), compiled and issued by the model management unit in the order of application models. When the "design serial number" is 1, it is omitted in the model. 3.1.5The first characteristic number
Used to indicate the rated voltage of the capacitor, the unit is kV (the unit of the E series is V). Note: For three-phase capacitors, the internal Y-type connection is the line voltage; the internal connection is (divided into three independent parts), the rated voltage is the voltage of each independent part.
3.1.6 The second characteristic number
JB/T7114—93
is used to indicate the rated capacity or rated capacitance of the capacitor. The unit of rated capacity is kvar, and the unit of rated capacitance is μF (the unit of Y series is pF).
3.1.7 The third characteristic number
is used to indicate the number of phases of parallel, series, and filter capacitors or the rated frequency of electric heating capacitors. Single-phase is represented by \1\, three-phase is represented by "3\, and the unit of rated frequency is kHz.
Note: For three-phase capacitors with 1-shaped connection inside, the number of phases is represented by "1×3. 3.1.8 The endnote number
is used to indicate the main use of the capacitor. The method of representation is shown in A1.1 of Appendix A (Supplement). The meaning of the letters in the "endnote number" should be explained in the product's sample, instruction manual and other relevant documents. Note: When the "third pending number" does not appear, the "suffix number" should be written after the "second characteristic number". 3.2 Method of indicating the model of capacitor device
The model consists of the device code, series code, design serial number, first characteristic number, second characteristic number, third characteristic number and suffix number, and its format is as follows:
3.2.1 Device code
Suffix number
Third characteristic number
Second characteristic number
First pending number
Design serial number
Series code
A device code
is used to indicate the capacitor device, and is represented by the uppercase Chinese pinyin letter "T". 3.2.2 Series code
is used to indicate the type to which the device belongs. Series, represented by two capital Chinese phonetic letters, the meaning of the letters is shown in Table 4. Table 4 Device series code and its meaning
Series code
Letter meaning
AC filter capacitor device
Parallel capacitor device
Series capacitor device
Impulse current generating device
Impulse voltage generating device
DC filter capacitor device
Series code
Note: ① Adding the letter X after the series code of the BB series of the local compensation device indicates that the voltage extraction device belongs to the capacitive voltage transformer series, and its series code is "YD". 3.2.3 Design serial number
is used to indicate the design sequence of the device. 3.2.4 First characteristic number
Letter meaning
Chopping device
AC capacitor voltage divider
Capacitor voltage transformer
Figure capacitor voltage divider
DC voltage generating device
is used to indicate the rated voltage of the device; the unit is kV. JB/T7114—93
Note: The rated voltage of the device is the rated voltage of the system for parallel, shunt and filter capacitor devices, and the rated voltage of the system divided by V3 for capacitor voltage transformers.
3 .2.5 The second characteristic number
is used to indicate the rated capacity (or capacitance) or current of the device, in kvar (or μF) or kA. Note: This characteristic number indicates "rated capacity" for parallel, series, and filter capacitor devices. The rated capacity is the total rated capacity of the capacitors in the device. It indicates "rated capacitance" for impulse voltage generating devices, condenser devices, voltage dividers, and capacitive voltage transformers; it indicates "rated current" for impulse current and DC voltage generating devices.
3.2.6 The third characteristic number
is used to indicate the number of phases of series and filter capacitor devices. Single-phase is indicated by "1", and three-phase is not indicated. 3.2.7 Footnotes
For high-voltage parallel, series, and filter capacitor devices, footnotes are used to indicate the main wiring mode and the relay protection mode of the capacitor group. They are represented by two uppercase Chinese phonetic letters. The first letter indicates the main wiring mode. The meaning of the letters is shown in Table 5. The second letter indicates the relay protection mode of the capacitor group. The meaning of the letters is shown in Table 6. When the footnote number is used to indicate both the main wiring mode and the relay protection mode of the capacitor group and the main use characteristics, its representation method is shown in A1.2.1 of Appendix A (Supplement). For low-voltage parallel and filter capacitor devices, footnotes are only used to indicate the main use characteristics. Its representation method is the same as that of the footnote number of a single capacitor (see Article 3.1.8). For capacitor voltage transformers, footnotes are used to indicate the main use characteristics. Its representation method is shown in A1.2 of Appendix A (Supplement).2.
The meaning of the letters in the "suffix number" shall be explained in the product's sample, instruction manual and other relevant documents. Table 5 The first letter of the device's suffix number and its meaning
Addition of code
Single star (Y connection)
Double star (YY connection)
Single delta (△ connection)
The second letter of the device's suffix number and its meaning
Voltage differential protection
Unbalanced current protection
Open delta voltage protection
Bridge differential current protection
Unbalanced voltage protection
When it is necessary to add codes and their meanings not listed in this standard, they shall be approved by the model management department, and the codes and their meanings used shall be clearly explained in documents such as product samples and instruction manuals. 5
Example 1:
Example 2:
Example 3:
Example 4:
TYD220/J3
F11/V3
100—100
JB/T7114-93
Indicates outdoor use
Indicates single phase
-Indicates rated capacity of 100kvar
Indicates rated voltage of 11/V3kv||tt| | indicates film-paper composite medium
indicates alkylbenzene diffusion
indicates parallel capacitor
indicates rated capacitance is 100pF
indicates rated voltage is 100kv
indicates nitrogen filling
indicates standard capacitor
indicates main connection is double star, relay protection mode is unbalanced current protection indicates rated capacity of device is 2400kvar
indicates rated voltage is 10kV||tt || indicates a parallel capacitor device
indicates a device
indicates that it is used in the humid tropical region, in light (level 1) pollution areas at an altitude of 2000m or less. It indicates that the rated capacitance is 0.005μF
indicates that the rated voltage is 220/V3kV
indicates a capacitive voltage transformer
indicates a device
Example 5:
JB/T7114—93
indicates that the rated capacitance of the device is 0.0 5uP
Indicates rated voltage of 2400kV
Indicates impulse voltage generating device
Indicates device
A1 Method of indicating suffix number
JB/T7114-93
Appendix A
Method of indicating suffix number in model
(Supplement)
Suffix number is used to indicate the main use characteristics of the product, and is indicated by 1 to 3 Chinese phonetic letters and/or Arabic numerals. A1.1 Method of indicating suffix number of a single capacitor A1.1.1 When the suffix number is indicated according to the meaning of the letters shown in Table A1, and there are no more than three letters, the alphabetical order shall be arranged in the order of Chinese phonetic letters, and the letters shall be uppercase Chinese phonetic letters. Table A1
Endnote number letter
Note: 1)
Group capacity is not equal
Used in neutral point non-effective grounding system
Used in high source area
Used in pollution migration area
Only electric heating capacitor is used, which is its structural form. Only coupling capacitor is used.
Effective placement method
Suffix number letters and their meanings
Suffix number letters
Letter meanings
Use in areas with explosion-proof requirements
Water-cooled (self-cooling is not indicated by letters)
Use in humid tropical areas
Outdoor use (indoor use is not indicated by letters)
Correspondence between usage characteristics and binary codes.6
Indoor and outdoor
Humid tropical areas
N is very heavy
≤1000
≤3000
Note: The 1-digit and 2-digit codes in Table A2 correspond to the contents of the names occupying 1 and 2 code positions respectively. When the suffix number is expressed according to the meaning of the letters shown in Table A1, and there are more than three letters or it is necessary to express the severity of pollution migration and the altitude level A1.1.2
, the expression method shall be expressed in accordance with Article A2.1 and Table A2. The binary code of the suffix number and its corresponding use characteristics are shown in Table A2. A1.2 Method of expressing the suffix number of capacitor devices A1.2.1 Method of expressing the suffix number of high-voltage parallel, series, and filter capacitor devices in the device When the suffix number is to indicate both the main wiring method and the relay protection method of the capacitor bank and the main use characteristics, it shall be expressed in accordance with Article A2.1 and Table A3.
The binary code of the suffix number and its corresponding main connection mode, relay protection mode and usage are to be found in Table A3. 55
Main connection mode
Single triangle
JB/T7114-93
The correspondence between the main connection mode and usage characteristics and the binary code 5
Maintenance protection mode
Voltage differential protection
Unbalanced current protection
Unbalanced voltage protection
Open triangle voltage protection
Bridge differential current protection
Indoor and outdoor
Humid tropical zone
N Very heavy
Note: The 1-digit, 2-digit and 3-digit codes in Table A3 correspond to the contents of the names occupying 1, 2 and 3 code positions respectively. N
≤1000
≤2000
≤3000
≤4000
A1.2.2 Method for indicating the suffix number of the capacitor voltage transformer in the device. A1.2.2.1 When the suffix number is indicated by the meaning of the letters shown in Table A4, and there are no more than three letters, the letters are arranged in the order of Chinese Pinyin, and the letters are uppercase Chinese Pinyin letters. When the suffix number is indicated by the meaning of the letters shown in Table A4, and there are more than three letters or it is necessary to indicate the severity of the pollution and the height level of the sea level, etc., its indication method shall be indicated in accordance with Article A2.1 and Table A5. The binary encoding of the suffix number and its corresponding usage characteristics are shown in Table A5. Table A4 Endnote letters and their meanings
Endnote letters
Letter meaning
Used in neutral point non-effective grounding system
Used in plateau areas
Used in pollution migration areas
Used in humid tropical areas
Correspondence between usage characteristics and binary codes, Table A5
Effective grounding of neutral point
N is very heavy
Note: The one-digit and two-digit codes in Table A5 correspond to the contents of the names occupying one and two code positions respectively. A2
Binary code transformation representation
≤1000
≤2000
≤3000
≤4000
The suffix number represented by this method uses binary numbers \1\ and \0\ to represent the usage characteristics of the product, and uses codes (Arabic numerals and/or lowercase Chinese phonetic letters) generated by the transformation to represent different usage characteristics. Representation steps
Binary encoding is performed according to the usage characteristics (Table A2 or Table A3 or Table A5); a.
JB/T7114-93
The encoding principle is: "0\ code is used to represent the commonly used situation as much as possible; b. The binary code is segmented, starting from the unit digit, and every five digits are divided into a segment; c. Calculate the decimal number corresponding to each segment of the binary number; For the conversion relationship between binary numbers and decimal numbers, see Table A6; d. Look up the numbers or letters corresponding to the decimal number (see Table A7), and merge the numbers or letters found according to the binary code segments. The resulting code (the number "0" at the far left of the code is omitted) is the footnote number. Table A6 Binary and decimal number conversion relationship Binary number
conversion coefficient
decimal number
decimal number
corresponding number
or letter
Decimal number
corresponding number
or letter
reverse the steps of using the endnote number
1168421
16+0+4+0+1=21
(multiply the corresponding position of the binary effect and the transformation coefficient
and add them together》
corresponding number or letter of the decimal number
find the corresponding number of each digit or letter of the endnote number according to Table A7 Decimal number; 11
Convert the decimal number to binary (keep dividing by 2 to find the remainder until the quotient is 1, see A3 Example 2). For each segment b.
, if the binary number is less than five digits, use "0" to fill the five digits in front of it. Combine each segment of binary numbers to get the binary code with the characteristics: compare each bit of the binary code with Table A2 or Table A3 or Table A5 (if the high bit of the code is insufficient, use "0\ to fill it).It can be known that c.
It represents the usage characteristics.
A3 Example
Example 1: The main connection mode of a parallel capacitor device is double star, and the relay protection mode of the capacitor group is unbalanced voltage protection. It is used outdoors in heavy (level) pollution areas with an altitude of 2000m or less. Please indicate the endnote number of the device. a.
According to Table A3, the binary encoding is 01010101001; the binary encoding is segmented into 10101 and 01001; the decimal numbers corresponding to each binary segment are calculated, which are 21 and 9; c.
Look up Table A7 to get the endnote number code as m9,
so the endnote number of the device is: m9.
Example 2: It is known that the endnote number in a capacitor model is 3n. What is the usage characteristic represented by this endnote number? a.
Look up the table A7 and get the corresponding decimal numbers 3 and 22; convert the decimal numbers to binary numbers (keep dividing by 2 to get the remainder until the quotient is 1, the quotient is the high code position); 57
Each segment of the binary number is: 00011
JB/T7114-93
c. The code position of table A2 is 8 bits, so the binary code is 01110110: remainder.
Look up the table A2 and get the usage characteristics represented by the footnote number: outdoor use, placement is horizontal, at an altitude of 3000m or below d.
Medium (level I) pollution and use in humid tropical areas. Additional notes:
This standard is proposed by the National Technical Committee for Standardization of Power Capacitors. This standard is under the jurisdiction of the Xi'an Power Capacitor Research Institute. This standard is drafted by the Xi'an Power Capacitor Research Institute. The main drafter of this standard is Wang Jing.
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