Some standard content:
ICS29.180
K41
JB
Machinery Industry Standard of the People's Republic of China
JB/T6300—2004
replaces JB/T6300—1992||tt ||Controlling voltage transformers
Controllingvoltagetransformers2004-03-12 release
2004-08-01 implementation
Foreword released by the National Development and Reform Commission of the People's Republic of China,
Scope
2
Normative reference document.
Terms and definitions
3
4
5
Product categories and models
Technical requirements.
5.
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9|| tt||Conditions of use
Ratings
Accuracy level
Voltage error and phase difference
Sealing performance
Temperature rise limit
Insulation requirements
Anti-power interference
General structural requirements,
5.10
6
Short circuit endurance
Test items||tt| |6.1
6.2
6.3
7
7.1
Test classification,
Type test,
Routine test
Test method
General requirements for testing
7.2
7.3
7.4
7.5
7.6||tt| |7.7
7.8
7.9
Rated short-time power frequency withstand voltage test
Induction withstand voltage test
Lightning impulse withstand voltage test|| tt||Temperature rise test
Short circuit withstand test
Error determination
Anti-power interference test
Insulating oil electrical strength test
7.10||tt ||Sealing performance test
Logo
8
8.1
8.2
Terminal mark
Nameplate
Packaging, Transportation, storage and factory documents
9
9.1
9.2
9.3
Packaging
Transportation
Storage,| |tt||Item
Times
JB/T6300—2004
J
JB/T6300—2004
9.4 factory files.||tt| |Table 1 Model letter meanings
Table 2 Error limits of voltage transformers
Table 3 primary winding insulation level
Table 4 short-time working withstand voltage of additional devices||tt ||Table 5 Shenlian resistance deviation limits
Foreword
This standard replaces JB/T6300-1992 "Voltage Transformer for Control". Compared with JB/T6300-1992 "Voltage Transformer for Control", the main changes in this standard are as follows: JB/T6300-2004
The writing format is in accordance with GB/T1.1-2000 "Standardization Work Guidelines Part 1 : Standard Structure and Preparation Rules": - The product model preparation has been adjusted according to the provisions of JB/T3837 "Transformer Product Model Preparation Method" - the title of the "Inspection Rules" chapter has been changed to "Test Items", and added Regarding the content of test classification, the necessary conditions for type testing have been eliminated:
A chapter of "Marking" has been added, and regulations on nameplates and terminal markings have been included in this chapter; "Packaging, transportation, The requirements for factory documentation are specified in the "Storage and Factory Documentation" chapter. This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Transformer Standardization Technical Committee (SAC/TC222). This standard was drafted by: Shenyang Transformer Research Institute. The main drafter of this standard: Wei Zhaohui.
The previous versions of the standard replaced by this standard are: JB/T6300-1992
1 range
Voltage transformer for control
JB/T6300-2004| |tt||This standard specifies the terms and definitions, product classification and model, technical requirements, test items, test method marking and packaging, transportation, storage and factory documents of voltage transformers for control. This standard applies to 6kV and below Control voltage transformers with voltage level and frequency of 50Hz or 60Hz and DC control voltage transformers with voltage level of 5kV and below. 2 Normative reference documents
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest version applies to this standard, GB311.! Insulation coordination of high-voltage power transmission and transformation equipment (GB311.1-J997, negEC60071-1:1993) GB/T507 Insulating oil breakdown voltage determination method (GB/T5072002, qVIEC60156:1995) Voltage transformer (GB1207--1997, eqvEC60186 ：1987)GB1207bZxz.net
GB1208 current transformer (GB1208-1997, eqvIEC60185:1987) Electrical terminology transformer, transformer, voltage regulator and reactor (neqIEC60050-421:1990, IECGB/T2900.151997E||tt ||60050-321:1986)
JB/T3837 Transformer product model compilation method JB/T9652--1999 Control current transformer JB/T104332004 three-phase voltage transformer
3 Terms and Definitions
The following terms and definitions established by GB1207, GB/T2900.15 and JB/T10433 apply to this standard. 3.1
Controlling voltage transformers
controllingvoltagetransformers are voltage transformers used for electrical measurement, voltage feedback and electrical protection in power supply, electronic control and converter equipment. 3.2
DC voltage transformers (direct current type voltage transformers) are a type of transformer used in DC systems to measure DC voltage or provide control devices with information proportional to the main circuit voltage. 3.3
Zero magnetic flux or current comparison (compensation) voltage transformers with zero magnetic flux or current comparison
(compensation)
With compensation winding, with or without detection components, the core working flux is Zero voltage transformer. 3.4
Zero magnetic flux or current comparison (compensation) DC voltage transformers with zero magnetic flux or current comparison (compensation) DC voltage transformers with excitation (or modulation) windings, with or without detection elements, and core working flux with zero DC voltage mutual inductance device. 3.5
Directive voltage transformation voltage transformer directivevoltage-transformationvoltagetransformersJB/T63002004
A voltage transformer in which the secondary voltage is directly transformed through the primary winding and the secondary winding to form a proportional relationship surface. 3.6
Indirect voltage transformation voltage transformer indirectvoltage-transformationvoltagetransformers-a transformer composed of resistors and electromagnetic units. It is designed and internally wired so that the secondary voltage of the electromagnetic unit is proportional to the voltage applied to the primary circuit with a resistor in series with the primary winding of the converter. 4 Product categories and models
Control voltage transformers are divided into: voltage transformers: DC voltage transformers: two-phase DC voltage transformers: AC and DC voltage transformers. The model of the voltage transformer for control is in accordance with the relevant provisions of JB/T3837. The meaning of the model letters is shown in Table 1. Table 1 Model letter meaning
Serial number
-
2
3
4
5
6||tt ||7
5 Technical requirements
5.1 Conditions of use
Classification
Type
Phase
Formula
Number| | tt | ||Detection components
5.1.1 Normal usage conditions
5.1.1.1 Altitude
The altitude should not exceed 1000m.
Note: When the altitude exceeds 1000m, see 5.1.2. 2
Interesting meaning
Voltage transformer
DC voltage transformer
Bidirectional DC Voltage transformer
AC and DC voltage transformer
Single phase
Blue phase
Transformer oil (or synthetic insulator)
Air (dry type )
Gas
Pouring molding (drama body)
Insulating shell
For measurement
For protection
Direct
Indirect
Normal
Cascade
Normal
Zero flux compensation type
Zero flux modulation type
None||tt| |Egg element
Photoelectric element
Piezoelectric element
Model letter
JZ
J2S
JZJ
D
S
G
Q
z
k
B
J
c|| tt||T
H
G
Y
5.1.1.2 Ambient temperature
Maximum temperature: 40℃:
Highest day Average temperature: 30℃:
Maximum annual average temperature: 20℃:
Minimum temperature: -5℃.
Note: When the temperature exceeds the above range, see 5.1.25.1.1.3 Relative Humidity
The monthly average maximum relative humidity does not exceed 90%, and the monthly average temperature is not lower than 25℃. 5.1.1.4 Atmospheric conditions
There is no contamination, corrosive and explosive media in the atmosphere that seriously affects the insulation performance of the transformer. 5.1.1.5 Installation conditions
There should be no serious vibration and bumps in the installation site.
5.1.2 Special conditions of use
JB/T6300—2004
If the conditions of use exceed the provisions of 5.1.1, the user should clearly indicate it when ordering. Such as altitude, cooling air temperature, earthquake resistance level, antimagnetic and pollution migration level and other special environmental conditions. For transformers that do not meet the normal use conditions specified in 5.1.1, the supplementary requirements for ratings and testing (within the specified range) shall be in accordance with GB1207.
For temperature conditions exceeding the specified value and special operating conditions (for example: when cooling air circulation is restricted), the temperature rise should be determined by the manufacturer and the user through consultation.
5.2 Rating
5.2.1 Rated primary voltage
Single-phase voltage transformer connected between phases in a three-phase system, its rated primary voltage is: 100V, 220V, 380V, 500V, 660V, 1150V.3000V.6000V.
The rated primary voltage of a single-phase voltage transformer connected between phases and ground in a three-phase system should be 1//3 of the above voltage. DC voltage transformer, its rated secondary voltage is: 110V, 220V, 440V, 500V, 630V, 800V, 1000V, 1250V1600V, 2500V, 3150V, 5000V. 5.2.2 Rated secondary voltage
The single-phase voltage transformer and DC voltage transformer connected between phases in the three-phase system have the rated secondary voltage: 10V, 100V. The rated secondary voltage of a single-phase voltage transformer connected between phases and ground in a three-phase system should be: 10/V3V, 100/V3V. 5.2.3 Rated output standard value
The rated output standard value of the voltage transformer for control is: 1VA, 1.5VA, 2VA, 2.5VA, 3VA, 3.5VA, 4VA, 5VA, 6VA, 7.5VA.10VA.15VA ,20VA,25VA,30VA,40VA,50VA,60VA,80VA,100VA. 5.2.4 Standard value of rated voltage factor
The standard value of rated voltage factor is in accordance with the provisions of GB1207. 5.2.5 Auxiliary power supply voltage fluctuation
The auxiliary power supply voltage fluctuation range of the control voltage transformer is: ±5%, ±10%, ±15%. Within the voltage fluctuation range of the auxiliary power supply, the voltage error of the control voltage transformer should not exceed the limit specified in 5.4. 5.3 Accuracy level
5.3.1 Accuracy level of direct voltage conversion voltage transformer The accuracy level of direct voltage conversion voltage transformer is in accordance with the regulations of GB1207. 5.3.2 Accuracy level of indirect voltage conversion type voltage transformer 5.3.2.1 Nominal accuracy level
The accuracy level of the voltage transformer for measurement, based on the percentage of the maximum allowable voltage error specified by the accuracy level at the rated voltage As the standard 3
JB/T6300—2004
.
The accuracy level of the voltage transformer for protection is designated as the percentage of the maximum allowable voltage error value of the accuracy level within the range of 5% of the rated voltage to the voltage corresponding to the rated voltage factor, and is followed by Marked with the letter "P". 5.3.2.2 Standard accuracy level
The standard accuracy level of voltage transformer for measurement: 0.1, 0.2, 0.5, 1, 3. The standard accuracy level of voltage transformer for protection: 3P, 6P. Voltage error and phase difference
5.4
When the rated frequency, rated load and power factor are 1.0, the voltage transformer for measurement is between 50% and 120% of the rated voltage, and the voltage transformer for protection is between 5 % of the rated voltage to the voltage corresponding to the rated voltage factor, the voltage error and phase difference of each accuracy level should not exceed the limits specified in Table 2. The voltage error and phase difference of the voltage transformer for protection are at 2% of the rated voltage. The difference should not exceed twice the limit specified in Table 2.
For bidirectional DC voltage transformers, the voltage errors in both the positive and negative voltage directions should not exceed the limits listed in Table 2. AC and DC voltage transformers. Neither AC nor DC voltage errors should exceed the limits listed in Table 2. Table 2 Error limits of voltage transformers
Type
For measurement
Voltage transformer
For protection
Voltage transformer
5.5 Sealing performance
Accuracy level
0.1
0.2
0.5
1.0
3.0
3P||tt| |6P
Voltage error
(%)
±0.1
±0.2
±0.5
±1.0
±3.0
±3.0
±6.0
±10
±20
±40
±80
± 120
±240
Phase difference
crad
±0.3
±0.6
±1.2
±2.4| | tt | Less than 0.025MPa.
5.6 Temperature rise limit
5.6.1 Direct voltage conversion type voltage transformer The temperature rise limit of direct voltage conversion type voltage transformer is in accordance with the regulations of GB1207. 5.6.2 Indirect voltage conversion type voltage transformer Indirect voltage conversion type voltage transformer should be subjected to temperature rise test when the auxiliary power supply voltage is positive deviation, and the temperature rise limit shall be in accordance with the provisions of GB1207. And the temperature rise of the auxiliary device should not exceed 60K. 5.7 Insulation requirements
5.7.1 Rated insulation level
The primary winding of the control voltage transformer shall be able to withstand the rated short-time power frequency withstand voltage specified in Table 3. Table 3 Primary winding insulation level
Voltage level
kv
0.66(0.63)
(1)
1.2 (1.25)
(1.6)
(2.5)
(3.0)
(5.0)
Note: The value in brackets is the DC voltage level, 4
Rated short-time power frequency withstand voltage (RMS value) kv
3
4.2
5.2
6.2
8
10
20
JB/T6300—2004
For AC control voltage transformers with voltage levels of 3kV and 6kV, the primary winding should be able to withstand the rated short-time power frequency withstand voltage specified in GB311.1.
5.7.2 Insulation requirements for secondary windings and excitation (or modulation) windings The rated short-time power frequency withstand voltage between the secondary windings and to ground, the excitation (or modulation) winding to ground, and between the secondary winding and the excitation (or modulation) winding are all 3kV (root mean square value). 5.7.3 Insulation requirements for additional devices
The additional devices for the control voltage transformer shall be able to withstand the rated short-time power frequency withstand voltage specified in Table 4. Table 4 Short-time power frequency withstand voltage of auxiliary equipment
Auxiliary power supply AC voltage (RMS value) and DC voltage V
U,≤60
60≤U,≤300
300≤U,≤660
5.7.4 Electrical strength of insulating oil
Rated short-time power frequency withstand voltage (RMS value) v
1000
2000
2500
The insulation pool should be able to meet the use conditions of oil-immersed control voltage transformers, and its breakdown voltage should not be lower than 40kV. 5.8 Anti-power supply interference
Control voltage transformers with semiconductor logic, linear, microprocessor components or assemblies to constitute auxiliary equipment should be able to work normally under fast transient electromagnetic interference from the power grid and ensure their corresponding accuracy level. 5.9 General structural requirements
5.9.1 Shell protection level
The shell protection level of the control voltage transformer is IP00, 5.9.2 Grounding bolt and grounding symbol
The control voltage transformer should have a grounding bolt with a diameter of not less than 8mm, or other parts for grounding. The grounding point should have a flat metal surface, and should have a reliable anti-rust coating or stainless steel material, and be marked with an obvious grounding symbol "亡" next to it. 5.9.3 Outgoing terminal
The outgoing terminal should comply with the provisions of GB1207 and JB/T10433. 5.10 Short-circuit withstand capacity
The short-circuit withstand capacity should comply with the provisions of GB1207. 6 Test items
6.1 Test classification
The tests specified in this standard are divided into type tests and routine tests. Type test: A test conducted on one transformer of each type to verify that the transformers manufactured according to the same technical specifications shall meet the requirements specified in addition to the routine tests. Note: A type test conducted on one transformer can be considered valid for other transformers with minor differences, but such differences shall be agreed upon by the manufacturer and the user.
Routine test: A test that each transformer shall undergo. 6.2 Type test
The following test items are type tests, and their detailed descriptions are given in the relevant provisions. a) Lightning impulse withstand voltage test (see 7.4): b) Power supply interference resistance test (see 7.8):
c) Temperature rise test (see 7.5):
5
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