电缆额定载流量
Current rating of Cable
交联聚乙烯绝缘电缆的导体最高额定工作温度为 9 0 ^ { \circ } C ,其额定载流量符合
IEC60092-352(2005)附录B中表4规定(环境温度为 4 5 ^ { \circ } C )
The conductor of XLPE insulated cable shall have a maximum rated operating
temperature of 9 0 ^ { \circ } C ,and its rated carrying capacity shall comply with IEC
60092-352(2005)Annex B.4 ambient temp.at 4 5 ^ { \circ } C
| 芯值 Core value | Nom. area mm2 | 环境温度 Ambient temperature | ||||||||
| 40°℃ | 45℃ | 50°℃ | ||||||||
| Conti-nuous | Short time rating | Conti-nuous | Short time rating | Conti-nuous | Short time rating | |||||
| 单芯 Single core | 1.5 | rating 24 | 0.5h 26 | 1h 26 | rating 23 | 0.5h 24 | 1h 24 | rating 22 | 0.5h 23 | 1h 23 |
| 32 | 33 | 33 | 30 | 32 | 32 | 28 | 30 | 30 | ||
| 2.5 4 | 42 | 44 | 44 | 40 | 42 | 42 | 38 | 40 | 40 | |
| 6 | 55 | 58 | 58 | 52 | 55 | 55 | 49 | 52 | 52 | |
| 10 | 76 | 80 | 80 | 72 | 76 | 76 | 68 | 72 | 72 | |
| 16 | 101 | 107 | 107 | 96 | 102 | 102 | 90 | 96 | 96 | |
| 25 | 133 | 143 | 141 | 127 | 136 | 134 | 119 | 128 | 126 | |
| 35 | 165 | 177 | 175 | 157 | 169 | 166 | 148 | 159 | 156 | |
| 50 | 206 | 224 | 218 | 196 | 213 | 208 | 184 | 200 | 195 | |
| 70 | 254 | 281 | 270 | 242 | 267 | 257 | 227 | 251 | 242 | |
| 95 | 308 | 349 | 328 | 293 | 332 | 313 | 275 | 312 | 294 | |
| 356 | 410 | 381 | 339 | 390 | 363 | 319 | 367 | 341 | ||
| 120 150 | 408 | 481 | 441 | 389 | 458 | 420 | 366 | 431 | 394 | |
| 185 | 466 | 564 | 508 | 444 | 537 | 484 | 417 | 505 | 454 | |
| 240 | 548 | 689 | 606 | 522 | 656 | 577 | 491 | 617 | 543 | |
| 300 | 631 | 825 | 711 | 601 | 786 | 678 | 565 | 739 | 637 | |
| 2芯 Double core | 1.5 | 21 | 22 | 22 | 20 | 21 | 21 | 19 | 20 | 20 |
| 2.5 | 27 | 29 | 29 | 26 | 28 | 28 | 24 | 26 | 26 | |
| 34 | ||||||||||
| 4 | 36 | 38 | 38 | 34 | 37 | 36 47 | 32 41 | 34 45 | ||
| 6 | 46 | 50 | 49 | 44 | 48 | 65 | 57 | 63 | 44 | |
| 10 | 64 | 70 | 68 | 61 | 67 | 87 | 61 | |||
| 16 | 86 | 96 | 92 | 82 | 92 | 116 | 77 102 | 86 | 82 | |
| 25 | 113 | 132 | 122 | 108 133 | 125 159 | 144 | 125 | 118 | 109 | |
| 35 | 140 | 167 219 | 151 193 | 167 | 208 | 184 | 157 | 149 196 | 135 | |
| 50 70 | 175 216 | 283 | 244 | 206 | 270 | 232 | 194 | 253 | 173 218 | |
| 95 | 261 | 363 | 305 | 249 | 346 | 290 | 234 | 325 | 273 | |
| 120 | 302 | 437 | 361 | 288 | 416 | 344 | 271 | 391 | 323 | |
| 150 | 348 | 523 | 426 | 331 | 498 | 406 | 311 | 469 | 382 | |
| 185 | 396 | 626 | 503 | 377 | 596 | 479 | 354 | 560 | 450 | |
| 3芯 Three core 70 95 120 | 1.5 | 17 | 18 | 18 | 16 | 17 | 17 | 15 | 16 | 16 |
| 2.5 | 22 | 24 | 23 | 21 | 23 | 22 | 20 | 21 | 21 | |
| 4 | 29 | 32 | 31 | 28 | 30 | 30 | 26 | 28 | 28 | |
| 6 | 38 | 41 | 40 | 36 | 39 | 38 | 34 | 37 | 36 | |
| 10 | 53 | 58 | 56 | 50 | 55 | 53 | 47 | 52 | 50 | |
| 16 | 70 | 80 | 75 | 67 | 76 | 72 | 63 | 71 | 67 | |
| 25 | 93 | 111 | 101 | 89 110 | 105 134 | 96 120 | 84 103 | 99 126 | 90 113 | |
| 35 50 | 116 144 | 141 185 | 126 | |||||||
电缆芯数多于4芯时,载流量按下列公式进行计算
For cables with more than 4 cores,the current ratings are given by the following formular:
I1:单芯电缆载流量 (I1=Current rating for single core) N:线芯数目 ( { \sf N } = Number of cores)
| 14 | 10 | 芯数 | 1.00 | 45 | ||||
| Z | 8 | 8 | 6 | V | 乙 | 0.94 | 50 | |
| 10 | 10 | 13 | V | 0.88 | 55 | |||
| 13 | 14 | 18 | V | 0.82 | 60 | |||
| 8 | 6 | 16 | N . | 0.74 | 59 | |||
| 9 | 9 | 9 | L | Z | V | 0.67 | ||
| Z | 8 | 8 | 6 | 6 | V | 乙 s | 0.58 | S |
| 6 | 10 | 10 | 12 | V | 0.47 | 80 |
短路载流量
Short Circuit Current Ratings
1)下列短路电流适用于电缆正常工作时导体的最高温度为 9 0 ^ { \circ } C 的电缆. The following short current ratings are for cables normally operating at a maximum conductortemperature of 9 0 ^ { \circ } C
2)作为理论计算的基础,按照IEC60724规定,短路中导体的温升为 2 5 0 ^ { \circ } \mathsf C As a basis of the calculation,the theoretical temperature that arises in the conductor during a short circuit is 2 5 0 ^ { \circ } \mathsf { C } in accordance with IEC 60724.
3)短路时间为1秒时铜的短路电流值见下表,短路时间非1秒时,短路载流量通过下列公式计算:
The short circuit current rating for copper conductors given in the table are values for 1sec.and for other duration the cu [rent may be calculated by the following formular:
It:短路t秒时的电流 Short circuit current for t second (A) I1:短路1秒时的 电流 Short circuit current for 1 second (A) t:短路时间 Short circuit duration (second)
4)假定的短路时间为0.2-5秒。
The duration of the short circuit based on these assumptions should be between 0.2s and 5s.
| 导体截面积 Conductor area | 短路1秒时的电流 currtirorit | 导体截面积 Conductor area | 短路1秒时的电流 currtircnits |
| mm2 | A | mm2 | A |
| 1 | 143 | 50 | 7154 |
| 1.5 | 215 | 70 | 10016 |
| 2.5 | 358 | 95 | 13593 |
| 4 | 572 | 120 | 17170 |
| 6號 | 859 | 150 | 21463 |
| 10 | 1431 | 185 | 26470 |
| 16 | 2289 | 240 | 34340 |
| 25 | 3577 | 300 | 42925 |
| 35 | 5008 |
电力电缆的电感和电抗值
Inductance and Reactance of Power Cable0.6/kV CJ(XLPE) 电缆0.6/1kV CJ(XLPE insulation) Cable
a) 阻燃型Flame retardant type
| 标称截面 Nom.area | 单芯电缆 Single core cable | 多芯电缆 Multi core cable | ||||
| 电感 | 电抗 Reactance | 电感 | 电抗 Reactance | |||
| Inductance | 60Hz | 50Hz | Inductance | 60Hz | 50Hz | |
| mm2 | mH/km | Ω/km | Ω/km | mH/km | Ω/km | Ω/km |
| 1 | 0.575 | 0.217 | 0.181 | 0.353 | 0.133 | 0.111 |
| 1.5 | 0.532 | 0.201 | 0.167 | 0.327 | 0.123 | 0.103 |
| 2.5 | 0.494 | 0.186 | 0.155 | 0.304 | 0.114 | 0.095 |
| 4 | 0.457 | 0.172 | 0.143 | 0.284 | 0.107 | 0.089 |
| 6 | 0.431 | 0.162 | 0.135 | 0.270 | 0.102 | 0.085 |
| 10 | 0.399 | 0.150 | 0.125 | 0.254 | 0.096 | 0.080 |
| 16 | 0.375 | 0.141 | 0.118 | 0.243 | 0.091 | 0.076 |
| 25 | 0.362 | 0.136 | 0.114 | 0.244 | 0.092 | 0.077 |
| 35 | 0.344 | 0.130 | 0.108 | 0.236 | 0.089 | 0.074 |
| 50 | 0.331 | 0.125 | 0.104 | 0.233 | 0.088 | 0.073 |
| 70 | 0.324 | 0.122 | 0.102 | 0.231 | 0.087 | 0.072 |
| 95 | 0.315 | 0.119 | 0.099 | 0.225 | 0.085 | 0.071 |
| 120 | 0.310 | 0.117 | 0.097 | 0.224 | 0.084 | 0.070 |
| 150 | 0.306 | 0.115 | 0.096 | 0.226 | 0.085 | 0.071 |
| 185 | 0.305 | 0.115 | 0.096 | 0.227 | 0.085 | 0.071 |
| 240 | 0.300 | 0.113 | 0.094 | 0.224 | 0.084 | 0.070 |
| 300 | 0.297 | 0.112 | 0.093 | 0.223 | 0.084 | 0.070 |
| b)耐火型 Fire resistant Type | ||||||
| 标称截面 Nom.area | 单芯电缆 Single core cable | 多芯电缆 Multi core cable | ||||
| 电感 | 电抗 Reactance | 电感 | 电抗 Reactance | |||
| Inductance | 60Hz | 50Hz | Inductance | 60Hz | 50Hz | |
| mm2 | mH/km | Ω/km | Ω/km | mH/km | Ω/km | Ω/km |
| 1 | 0.590 | 0.222 | 0.185 | 0.396 | 0.149 | 0.124 |
| 1.5 | 0.549 | 0.207 | 0.172 | 0.366 | 0.138 | 0.115 |
| 2.5 | 0.508 | 0.192 | 0.160 | 0.338 | 0.127 | 0.106 |
| 4 | 0.470 | 0.177 | 0.148 | 0.314 | 0.118 | 0.099 |
| 6 | 0.443 | 0.167 | 0.139 | 0.296 | 0.112 | 0.093 |
| 10 | 0.406 | 0.153 | 0.128 | 0.277 | 0.104 | 0.087 |
| 16 | 0.385 | 0.145 | 0.121 | 0.262 | 0.099 | 0.082 |
| 25 | 0.369 | 0.139 | 0.116 | 0.260 | 0.098 | 0.082 |
| 35 | 0.351 | 0.132 | 0.110 | 0.250 | 0.094 | 0.078 |
| 50 | 0.338 | 0.127 | 0.106 | 0.245 | 0.092 | 0.077 |
| 70 | 0.328 | 0.124 | 0.103 | 0.241 | 0.091 | 0.076 |
| 95 | 0.318 | 0.120 | 0.100 | 0.234 | 0.088 | 0.073 |
| 120 | 0.314 | 0.118 | 0.099 | 0.232 | 0.087 | 0.073 |
| 150 | 0.309 | 0.116 | 0.097 | 0.233 | 0.088 | 0.073 |
| 185 | 0.309 | 0.116 | 0.097 | 0.233 | 0.088 | 0.073 |
| 240 | 0.304 | 0.115 | 0.096 | 0.230 | 0.087 | 0.072 |
| 300 | 0.299 | 0.113 | 0.094 | 0.228 | 0.086 | 0.071 |
通信和仪表电缆的电气参数
Electrical characteristics for communication and instrumentation cables
| 电气特征 Electrical characteristics | 导体规格mm2 | ||||
| 0.75 | 1.0 | 1.5 | 2.5 | ||
| M作t电a ca naeitace | Individualscreen | 90 | 100 | 110 | 120 |
| Coletiveareen | 80 | 90 | 100 | 100 | |
| 电感lnductance mH/km | 0.69 | 0.65 | 0.64 | 0.60 | |
电压降的计算
Calculation of Voltage Drop
关于电压降,请按照下列公式进行:
With regard to the voltage drop, please calculate as the following formulas: 1)直流电路(两线) Two wire D.C.circuit
Vdrop = 2 x 1 x 1 x 1
上述公式中 In the above formulas
I:负载电流 Load current (Amp)L:电缆长度Length ofcable (km)R:在最高额定工作温度时导体的交流电阻
A.C.conductor resistance at Max.rated temp.(Ω/km) 2)交流电路 A.C.circuit a 单相电压降Single-phasevoltage drop
b.三相电压阵Three-phase voltage drop
Vdrop = sqrt { 3 } x 1 x \mathsf { L } x ( \mathsf { R } x \mathsf { c o s } \Phi + \mathsf { X } x \mathsf { s i n } \Phi )
上述公式中Inthe above formulas
I:负载电流 Load current (Amp)L:电缆长度Length ofcable (km)R:在最高额定工作温度时导体的交流电阻
A.C.conductor resistance at Max.rated temp. ( \Omega / \ k \mathsf { m } )
X:电缆的电抗Reactance of the cable (Ω/km)
\Phi :电流滞后或领先电压所成的功率因数角度
Power factor angle by which the current lags(or leads) the voltage
敷设建议
Installation Precautions
1)电缆的最小弯曲半径 Minimum BendingRadius
电缆的最小弯曲半径应符合IEC60092-352的规定,具体如下:
The min.recommended installation bending radius shallbe in accordance with
IEC 60092-352 as following:
| 电缆结构 Cable construction | 电缆外径 Overall dia. of cable (D) | 最小弯曲半径 Min. radius of bend | |
| 绝缘lnsulation | 包覆层 Covering | ||
| 具有圆铜导体的热塑性或热固性 材料 Thermoplastic or Thermosettingwith circular copper conductors | 无铠装或无编织 Unarmored or unbraided | ≤25mm | 4D |
| >25mm | 6D | ||
| Metalbraid屏ndrarmored 金属线铠装金属带铠装或金属护套 | 任意值Any | 6D | |
| Metal wire armored metal tape armored armor or metal-shaped 复合聚脂/金属带屏蔽组件或整体屏蔽Composite polyester/metal tape screened units or collective tape | 任意值Any | 8D | |
| 异形导体的热塑性或热固性材料 Thermoplastic or thermosetting with shaped copper | screen 任何材料 Any | 任意值Any 任意值Any | 8D 6D |
2)抗拉伸力Pullingtension敷设过程中电缆的抗拉伸力可以通过下列公式进行估算.
The cable pulling tension during installation can be estimated through the following formula.
铠装电缆:Forarmorcable
=50N×导体总面积 P = 5 0 N x total cross section area of conductors)
非铠装电缆:Forunarmoredcable
P=25N× 导体总面积 0 P = 2 5 N x total cross section area of conductors)
注:其他抗拉伸力来自编织、绝缘和护套材料
Note: Additional tensile will be supplied from the braid and the insulation and sheathing material.
3)最低敷设温度和工作温度
Minimum installation temperature and operation temperature除非另有说明,低烟无卤电缆的最低敷设温度建议不低于 * 2 0 ^ { \circ } C ,最低工作运行温度不低于-40℃。
Unless otherwise specified,the minimum recommended installation temperature of low smoke halogen free cables shall not be lower than * 2 0 ^ { \circ } \mathsf C , and lowest operation temperature of that shall not be lower than \angle 4 0 ^ { \circ } C
线芯识别 Coreldentification
1)低压电力和控制电缆
Low voltage power and control cables
1芯:白色
1-core: White
2芯:白色,红色
2-core: White and Red
3芯:红色,白色,蓝色
3-core: Red,White and Blue
4芯:红色,白色,蓝色,黑色
4-core: Red,White,Blue and Black
5芯及以上:白色线芯打印黑色数字
5-core and above: Black numbering on white insulating
地线:黄/绿色
Earthing wire: Green/Yellow
2)仪表与通信电缆
Instrumentation and communication cables
对绞线对:红色,白色
Twisted pair: Red and White
三线绞组:蓝色,白色,红色
Twisted triple: Blue,White and Red
线对线芯上打印数字得以标识。
The cores forming a pair shallbe identified by having the same number printed on the insulation of each core.




