JB/T 2426-1992 Technical parameters and requirements of three-phase transformers for power plants and substations
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T2426
1992-06-26
1993-01-01
Zhang Xianji
Jicken cheek Xin Kui Lu Wa Art Knife
Addiction Yan Ju
Subject Confidentiality and Applicability
JB/T2426
JB242678
This standard specifies the performance data, technical requirements, materials, Test items and marking, packaging and transportation.
This standard applies to three-phase transformers for power plants and substations with a frequency of 50Hz: including: double-winding indoor dry-type transformers with a rated voltage of 21kV or less, a rated capacity of 30~3150kVA, and insulation heat resistance grade B: double-winding oil-type transformers with a rated voltage of 3~220kV and a rated capacity of 30~3150kVA; oil-type split transformers with a rated voltage of 15~220kV and a rated capacity of 1601~63000kVA. This standard is not applicable to dry-type transformers with encapsulated windings. 2 Reference standards
GB1094.1~1094.5 Power transformer
GB 2900.10
GB4109
G 5273
G10237
ZBK4I005
Performance cost
Electrical terminology Transformer, mutual seal, transformer, reactor Bushing general technical conditions for AC voltage higher than 1000V Terminal blocks for transformers, high-voltage electrical appliances and bushings For type power transformers
Insulation level and insulation test of power transformer Air membrane of external insulation 6-220kV transformer sound level
Performance parameters are specified in Tables| to 7:
Rated capacity
3.15:6.3:10.5
13. 8; 15.75
3. 1516.3: 10.5
13.#: 15.75
30~3150kVA double winding non-excitation voltage regulating transformer connection group No. No-load loss Load loss
Tap changer
1992-06-26
D,ynti
No-load current
Impedance voltage
(6.0); 8.0.
4. 0 6. 0
1993-01-01Small lock
Tentative capacity
3. 15; 6.3# l. 5
13.8;15.75
3.15:6.3:10.5
13. of: 15. 75
3.15;6.3:10.5
13. 3; 15. t5
3.15:6.3:10.5
13.8:15.75
3.15:6.3;10.5
13.8; 15.75
3.15;6.3; 75
[10, 5
13. 8; 15. 75
[16;20
3. 15: 6,3: 10.5
13. 8: 15.75
13.6; 15.75
3.15:f.3:10. 5
33.8: 15.75
13.8; 15.75
18：20
3. 1576. 3: 10. 5www.bzxz.net
13.8; 15. 75
13.8:15.75
16.3110.5
JB/T2426
Medical connection group number
No-load loss
Tap range low
Y, ynn
D, ynli
.Y,yng
D,ynl!
Y, ynd
D, ynll
Note: (According to the requirements, the high-voltage tap range can provide 1 2 × 2. 5X 1.50
Load loss
16, 40
No-load current
Impedance voltage
4. : 7. 0
(6.53;8.0
4. 0:7. 0
(6.53:8.0
4. 0: 7. 0
(6.5):8.0
4. 5;7. 0
(6.5):8.0
(6.5):8.0
B. 0: 10. 0
(8.03:10. 0
8. 0: 10.0
(8.03+10.0
8: 0; 10.0
8. 0: 10. 0
<8.03:10.0
K6.0):8.0
8. 0: 10. 0
ra.0),fo,8
(6.0318.0
8,01[0.们
(,0: 10. C
(8.0):10.0
③Impedance transformer can be proposed according to user's requirements. According to ordering requirements, single-phase flat transformer can be supplied, and single-phase or three-cabinet on-load dry transformer can also be supplied. 2
Determined capacity
3.1516.3; 10.5
3. 15: 6. 3± 10. 5
3, 151 6. 3: 10. 5
3.15:6.3: 10.5
3.156.3:10.5
7. 15+6. 3: [0.5
13.8115.75
3.1516.3110.5
13. 8# 15.75
3. 15:6. 31t0.5
13.15.75/18120
24; 351 38.5
3. 15 6. 3110. 5
13.8115.75:1620
24:3538.5
3.1571. 3:10. 5
13.8:15.15:120
24:35138.5
3-15:6.3:10. 5
13.8;15.75:18120
24:35/38.5
3. 15++. 11I8. 5
13.8:15.75115120
24135138.5
3. 151 6, 3± 10, F
13, 8:15, 75 12
24135131.5
3.1516.3:30.5
13.8:15.15:18:20
24735:31.5
3. 15: 6.3 10. 5
-13.1:15.75m18:20
24135:36.5
3.15#6.3,10.5
13.8: 15.75: 18+20
2435:38.5
JB/T24261992
30-2080kVA induction group non-assisted magnetic voltage regulating oil-fired distribution transformer upper load consumption
group number is extracted consumption
tap range is low E
'D,ynil
Note ①According to the ordering requirements, the high-voltage tap range can be provided by ±2×2.5%, @Aokang voltage can be proposed according to the user's banquet service. k#
Li power supply
Group withstand voltage
Rated capacity
6.3: 10.5
JB/T24261992
20~160mkYk double Wei group with tailored oil diffused transformer 1 connection group number
Reading range low power
Note: After using withstand voltage, it can be proposed separately according to user requirements. Table 4
Rated capacity
10. 5: 13,8
No-load power consumption
self. 94
Load power consumption
No-load power consumption
1000-3150VA double-winding non-magnetic voltage regulating oil-immersed power transformer
10.5113.8:15.3
110:121
10. 5:13, 8
Special low voltage
Contact number
YN yno
B, yrsl
Dense resistance
Load power consumption No-load current limiting resistance
No-load power consumption
Rated capacity
Ti0:121
10. 5: 13. B
Tin:121
13.B;15.75
13.8: 15. 75; 18; 20
13.8:15.15
13.6:15.75118
110;121
15.75: 14: 20#24
15. 751月; 20; 24
110:12]
220:242
JB/T24261992
Continued Table 4
Connection group number No-load loss
Carrying range
± 2×2. 5
1±2×2,5
D, ynl
YN,yno
YN,ymg
D, yn!
Y, yno
YTN, yng
YN,d11
D, yn!
Y, yno
Y N,yud
D,yal
220242
JB/T2426
Tap type low voltage
Connection group number
Number of load phase loss
No-load loss
D, yn1
YN,yno
No-load current
Limiting voltage
Note, 》According to the ordering requirements, the transformer with winding connection group of N, yno-ynu can have stable winding, and the performance parameters shall be negotiated by both parties,
② Products with the internal limiting impedance voltage value in the table should be used as little as possible, and the maximum loss value shall be negotiated by both parties when selecting. ③ The rated capacity of the transformer can be specified according to the user's requirements. Rated capacity 110115 115:115 10000 31500% double-fired fine-tuning oil-fired power transformer 5 Distribution range ±8×3.25 ±8×[.25 ±4×2.5 ±1×1.25 Connection group number YN, dii u, ynl YN, d11
No-load loss
Low-load current
Impedance voltage
Rated capacity
110:115
110:115
220;230
[1:115
220:230
Tap range
±B×1.25
±8×1. 25
±8×t. 25
±#×1. 25
JB/T24261992
Continued Table 5
Connection group number
YN ynd
D, ynl
N, ynit
D, ysu
D, ynt
D, yn!
YN, dil
YN,ynd
YN yno
No-load loss Load loss No-load current
Resistance voltage
Note, (according to the order requirements, the transformer with winding connection group YN,ynOynO can be equipped with a stabilizing winding, and the performance figures are agreed by both parties.
The products with the impedance voltage values in the brackets in the table should be selected as little as possible, and the loss values are negotiated by both parties. The impedance voltage can be reported separately according to the user's requirements. Frequency rated capacity
13,8115.5
13.1:15:75
1 13, 8:5.75
13.8：15.75
15.75+ Le
Ti0:121
220:242
T1D:121
220242
10:121
2201242
JB/T2426
16000-6300 VA non-assisted magnetic pressure regulating oil-free split power transformer food
sub-change range
connection over-term standard
Y,yndya!
D, ynf-yal
b, ao--do
YN,yn--ynd
, ynl--ynl
Y,yno-yno
D, ynl-yn!
YN, yn-yne
Y,d di
D, ynD-ynD
D,ynl-ynl
YNyno-yng
N,d1t-di
D,yn-yni
YNyao-yno
, dii-di1
Y, yno--yno
ynt-yni
pdo-an
YNa-yan
YN,yno-yno
,dit-d1
Y, yno-ynl
D, ynj.-ynl
D, do-dc
YN, yno- yno
YNdi-d
D. ynt-ynl
YN.yne-yn
Yn, d11-d11
load cut-off plug-in no-load line current impedance voltage
no-load loss
frequency rated capacity
pressure combination
tap range
18: 20124
220:842
ER; 20: 24
Tn:121
220:242
±: 2×2. 5
JB/T24261992
Continuation Table 6
Connection group label
D, yni-ynl
D,dn-do
YN,yno-yno
tt||YN,d1 d1l
D, ynfl-yn!
63- 63
D,ao du
YN,yno-yno
YN, d11 -d11
u, ynl-yn!
YN,ynu-yno
YN,d11-d11
No-frequency load loss machine
No-frequency current.
Impedance voltage
Note: ①The impedance voltage in the table is the voltage of the high-voltage winding to any of the two low-voltage windings. According to the ordering requirements, the transformer with the combination of YN and yn-yHD can be equipped with a stabilizing winding. The saturation parameters are negotiated by both parties.Products with impedance voltage values in brackets should be used as little as possible, and the loss number shall be negotiated by both parties when selecting. ① According to the order requirements, the low-voltage winding can be made into a longitudinally split structure, but the loss number shall be negotiated by both parties. The voltage to be avoided can be taken as required by the user, Table 7 16000~5300VA with oil-type split power transformer rated capacity
Tap range
±8×1.25
±4×2.5
±8×1.25
±4×2.5
±8×1.25
Connection group number
Ith.ynd-yno
YN.d11-d11
D,yni-ynl
YN,yna-yno
YN,d11-dl1
D,ynl ynt
,yni-yn
dil-di1
D, ynl-ynl
YN,yho-yn
YN, dI1-d11
D, ynj-yn!
Air condensation load loss
No-load current resistance voltage
Flickering capacity
220:230
35;36,5
110:115
2201230
110:115
220:230
-60:63
[10:115
220+230
116:115
220;230
Tap range
±B×1. 25
±9 × 1. 15
± -di11
D,ynl ynl
YN,yno-yno
YN di-dri
D, ynl-ynt
YNyn0-ynd
YNyno-yno
YN,dildil
D yni-ynl
yNyno-yn
D, yni-ynl
YNynB-yno
Yn,d11-d11
D, ynl-yn!
YN,yno-ynD
YN, dl1-dt
D,yni-yni||tt| |yna-yno
N, d1-dI1
YN, yno-yno
N,di[-d1l
D, ynl-yn!
YN, yno-ynd
D, yni-ynl
YN, yno-ynd
Note 1 The impedance voltage in the table is the impedance voltage of the high voltage winding to any of the two low voltage windings. No-load current
Impedance voltage
③According to the ordering requirements, the winding connection is YN, and the transformer of y-yno can be equipped with a certain configuration. The performance parameters are negotiated by both parties.
③ Products with impedance voltage values in brackets in the table should be selected as little as possible, and the loss values should be negotiated by both parties. 10
JB/T24261992
①According to the ordering requirements, the low voltage winding can be made into a structure with light split, but the loss values are negotiated by both parties, and the impedance voltage can be proposed separately according to the user's requirements. (For transformers with rated capacity of tU000kVA and above and voltage of 35kV, due to structural reasons, both parties can cooperate to supply tappings close to those specified in the table.
Technical requirements
4. The transformers specified in this standard shall comply with the provisions of GB 6450 and 6B 1094.1~1094.5. 4.2 Allowable deviation of open-circuit voltage ratio
For transformers with a main tapping voltage ratio of 3 or less and transformers with high-voltage generator voltage, the maximum allowable deviation of the open-circuit voltage ratio between the main tapping and other tappings is +1%6. 43. The cooling method of the following transformers is air self-cooling. The cooling method of oil-cooled transformers is shown in Appendix C. For oil-cooled transformers, the capacity of the low-voltage winding should be According to the order requirements, the transformer with rated capacity of 500kVA and below 4.4
can supply the oil-immersed split transformer with low-voltage winding capacity of 511%~51% of the rated capacity. Table 8
High-voltage wheel group rated capacity
Tap capacity
The tap capacity of the transformer without magnetic assistance and with voltage regulation is full capacity. Low-voltage group capacity
100010000
125 00—12500
16000—16000
20000—20000
25000--25000
31500—-31500
31500-—31500
Note: According to the ordering requirements, under the condition that the tapping range and tapping number remain unchanged, the transformer with positive and negative tapping can be supplied. When the number specified in the third rate of the standard is exceeded, it is better to add a more negative tap, and the tap capacity should be reduced by a small tap ().
4.6 For non-excitation and cut-off voltage transformers, the limit positive tap voltage should correspond to the first tap position of the transmission mechanism. 4.7 Oil-immersed transformers should be able to withstand the current impact when the motor starts, and should not produce mechanical and electrical shock. The ratio of the effective value of the impact current to the effective value of the rated current is not greater than 5, and the duration does not exceed 165. 4.8 Ability to withstand short circuits
4.8.1 Thermal resistance to withstand short circuits
4.1-1 Symmetrical short-circuit current
According to GB1094.5 Section 2.1.2, the symmetrical short-circuit current value of the three-phase double-winding transformer should be calculated with a 1.05 supply winding voltage and without considering the system impedance (Zs-D).dl1-dt
D,yni-yni
yna-yno
N, d1-dI1
YN, yno-yno
N,di[-d1l
D, ynl-yn!
YN, yno-ynd
D, yni-ynl
YN, yno-ynd
Note 1 The impedance voltage in the table is the impedance voltage of the high-voltage winding to any of the two low-voltage windings. No-load current
Resistance voltage
③ According to the ordering requirements, the transformer with the winding connection of YN and yno can be equipped with a certain voltage, and the performance parameters are negotiated by both parties. ③ Products with the impedance voltage values in brackets in the table should be selected as little as possible, and the loss values should be selected by negotiation between both parties. 10
JB/T24261992
① According to the order requirements, the low voltage winding can be made into a structure with light split, but the loss number shall be negotiated by both parties, and the impedance voltage can be proposed separately according to the user's requirements. (For transformer groups with rated capacity of tU000kVA and above and voltage of 35kV, due to structural reasons, both parties can cooperate to supply tappings close to those specified in the table.
Technical requirements
4. The transformers specified in this standard shall comply with GB 6450 and 6B 1094.1~1094.5. 4.2 Allowable deviation of open-circuit voltage ratio
For transformers with a main tap voltage ratio of 3 or less and transformers with high voltage as generator voltage, the maximum allowable deviation of the open-circuit voltage ratio between the main tap and other taps is +1%6. 43 The cooling method of the transformer is air self-cooling. The cooling method of oil-cooled transformers is shown in Appendix C. For oil-cooled transformers, the low voltage winding capacity should be According to the order requirements, the transformer with rated capacity of 500kVA and below 4.4
can supply the oil-immersed split transformer with low-voltage winding capacity of 511%~51% of the rated capacity. Table 8
High-voltage wheel group rated capacity
Tap capacity
The tap capacity of the transformer without magnetic assistance and with voltage regulation is full capacity. Low-voltage group capacity
100010000
125 00—12500
16000—16000
20000—20000
25000--25000
31500—-31500
31500-—31500
Note: According to the ordering requirements, under the condition that the tapping range and tapping number remain unchanged, the transformer with positive and negative tapping can be supplied. When the number specified in the third rate of the standard is exceeded, it is better to add a more negative tap, and the tap capacity should be reduced by a small tap ().
4.6 For non-excitation and cut-off voltage transformers, the limit positive tap voltage should correspond to the first tap position of the transmission mechanism. 4.7 Oil-immersed transformers should be able to withstand the current impact when the motor starts, and should not produce mechanical and electrical shock. The ratio of the effective value of the impact current to the effective value of the rated current is not greater than 5, and the duration does not exceed 165. 4.8 Ability to withstand short circuits
4.8.1 Thermal resistance to withstand short circuits
4.1-1 Symmetrical short-circuit current
According to GB1094.5 Section 2.1.2, the symmetrical short-circuit current value of the three-phase double-winding transformer should be calculated with a 1.05 supply winding voltage and without considering the system impedance (Zs-D).dl1-dt
D,yni-yni
yna-yno
N, d1-dI1
YN, yno-yno
N,di[-d1l
D, ynl-yn!
YN, yno-ynd
D, yni-ynl
YN, yno-ynd
Note 1 The impedance voltage in the table is the impedance voltage of the high-voltage winding to any of the two low-voltage windings. No-load current
Resistance voltage
③ According to the ordering requirements, the transformer with the winding connection of YN and yno can be equipped with a certain voltage, and the performance parameters are negotiated by both parties. ③ Products with the impedance voltage values in brackets in the table should be selected as little as possible, and the loss values should be selected by negotiation between both parties. 10
JB/T24261992
① According to the order requirements, the low voltage winding can be made into a structure with light split, but the loss number shall be negotiated by both parties, and the impedance voltage can be proposed separately according to the user's requirements. (For transformer groups with rated capacity of tU000kVA and above and voltage of 35kV, due to structural reasons, both parties can cooperate to supply tappings close to those specified in the table.
Technical requirements
4. The transformers specified in this standard shall comply with GB 6450 and 6B 1094.1~1094.5. 4.2 Allowable deviation of open-circuit voltage ratio
For transformers with a main tap voltage ratio of 3 or less and transformers with high voltage as generator voltage, the maximum allowable deviation of the open-circuit voltage ratio between the main tap and other taps is +1%6. 43 The cooling method of the transformer is air self-cooling. The cooling method of oil-cooled transformers is shown in Appendix C. For oil-cooled transformers, the low voltage winding capacity should be According to the order requirements, the transformer with rated capacity of 500kVA and below 4.4
can supply the oil-immersed split transformer with low-voltage winding capacity of 511%~51% of the rated capacity. Table 8
High-voltage wheel group rated capacity
Tap capacity
The tap capacity of the transformer without magnetic assistance and with voltage regulation is full capacity. Low-voltage group capacity
100010000
125 00—12500
16000—16000
20000—20000
25000--25000
31500—-31500
31500-—31500
Note: According to the ordering requirements, under the condition that the tapping range and tapping number remain unchanged, the transformer with positive and negative tapping can be supplied. When the number specified in the third rate of the standard is exceeded, it is better to add a more negative tap, and the tap capacity should be reduced by a small tap ().
4.6 For non-excitation and cut-off voltage transformers, the limit positive tap voltage should correspond to the first tap position of the transmission mechanism. 4.7 Oil-immersed transformers should be able to withstand the current impact when the motor starts, and should not produce mechanical and electrical shock. The ratio of the effective value of the impact current to the effective value of the rated current is not greater than 5, and the duration does not exceed 165. 4.8 Ability to withstand short circuits
4.8.1 Thermal resistance to withstand short circuits
4.1-1 Symmetrical short-circuit current
According to GB1094.5 Section 2.1.2, the symmetrical short-circuit current value of the three-phase double-winding transformer should be calculated with a 1.05 supply winding voltage and without considering the system impedance (Zs-D).
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