接地与等电位连接计算器
选定接地、总接地及等电位连接导体。
Reads AS/NZS 3000:2018. Tables checked 27 Sept 2026.
尝试一个工程 6
每项工作都会预填示例数值。请替换为您自己的数值。
- Size the earth for a shed submainThe protective earth for a 6 mm² copper submain to a shed.
- Size the main earth for large mainsThe main earthing conductor for 95 mm² consumer mains.
- Size the earth for an aluminium submainThe protective earth for a 120 mm² aluminium submain.
- Check an earth by the adiabatic equationThe earth conductor for a 6 kA fault cleared in 0.4 s, by calculation.
- Size the bond at a telecom terminalThe bonding conductor at a telecommunications earth.
- Size a bare copper earthThe earth with the k value of bare copper.
输入
使用默认输入值的示例计算。
- 有源导体材料
- 铜
- 最大带电导体
- 16 mm²
- 用户主电源相线导体
- 16 mm²
- 等电位连接盒
- 总等电位联结
- 按计算检查
- 否
保护接地导体
6mm²
- 来自表
- 6mm²
- 总接地导体
- 6mm²
- 等电位连接导体
- 4mm²
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- 表格中的保护接地导体6mm²
AS/NZS 3000:2018 Table 5.1
- 主接地导体6mm²
AS/NZS 3000:2018 Cl 5.3.3.2
- 等电位连接导体4mm²
AS/NZS 3000:2018 Cl 5.6.3.2
- 所选保护接地导体结果6mm²
AS/NZS 3000:2018 Table 5.1
关于此计算器
How this is calculated
The tool sizes the protective earthing conductor, the main earthing conductor and the bonding conductor. It reads AS/NZS 3000:2018. It starts from the size of the active conductor.
- Protective earthing conductor. You enter the active size and the conductor material. The tool reads the earth size from Table 5.1.
- Main earthing conductor. The tool reads Cl 5.3.3.2. It sizes the conductor from the consumer mains size you enter.
- Bonding conductor. You pick the bonding case. The tool reads the bonding conductor size from Cl 5.6.3.2.
- Adiabatic check. If you turn it on, you enter the fault current and clearing time. The tool then checks the selected conductor against the adiabatic equation. A larger size replaces the table size if it fails.
| Step | Table or clause | What it decides |
|---|---|---|
| Protective earth | AS/NZS 3000:2018 Table 5.1 | The earth size for the active size |
| Main earth | Cl 5.3.3.2 | The main earthing conductor size |
| Bonding | Cl 5.6.3.2 | The bonding conductor size |
Worked example
- 16 mm² copper active conductors. Consumer mains are also 16 mm², with the general bonding case. The protective earthing conductor is 6 mm². The main earthing conductor is 6 mm². The bonding conductor is 4 mm².
Limits
The table sizes cover the usual installation. The tool does not cover a special case. A long earth route can need a larger conductor for loop impedance. Use the loop impedance tool for that.
The tool does not choose the earth electrode or the earthing system. It does not check the conduit or cable support. The adiabatic check is off until you turn it on.
See also: The MEN system, Short-circuit withstand and the k factor and the fault rating tool.
问题
结果仅供设计参考。请依据现行标准核对。
接地工具有什么作用？
工具依据最大相线截面读取保护接地导体的截面，依据用户进线读取总接地导体的截面。它采用 4 mm² 最小值和 120 mm² 最大值，并报告等电位连接线尺寸。也可通过计算校核截面。
哪张表给出接地导体截面？
AS/NZS 3000:2018 Table 5.1。本工具读取铜相线列或铝相线列。总接地导体规则来自 Clause 5.3.3.2。等电位连接截面来自 Clause 5.6.3.2。
计算选项的作用是什么？
本工具应用 Clause 5.3.3.1.3 的 Equation 5.1。将故障电流平方后乘以切断时间，再开平方并除以 K，得出截面。结果向上取整至下一标准规格。该公式适用于 0.1 s 至 5 s。
应使用哪个 K 值？
Clause 5.3.3.1.3 的注 1 对裸铜给出 170。对于未与其他导体成束于同一电缆中的 PVC 绝缘铜导体，给出 136。接地导体可以是与其他导体成束于同一电缆中的一根芯线。此时，应改用 AS/NZS 3008.1.2 Table 52 中的 k 系数。
MEN 连接线的截面是多少？
工具依据用户进线的相线截面确定总接地导体截面。铜导体至少为 4 mm²，且最大无需超过 120 mm²。截面小于 16 mm² 的铝相线未列入表中。
计算示例
背景
本工具读取的条款和表格
- AS/NZS 3000:2018 Cl 5.3.3Earthing conductor size
- AS/NZS 3000:2018 Cl 5.3.3.2Main earthing conductor size
- AS/NZS 3000:2018 Cl 5.6.3.2Bonding conductor size
- AS/NZS 3000:2018 Table 5.1Minimum earthing conductor size by active conductor size
- AS/NZS 3000:2018 Table 5.1Minimum copper earthing conductor size for aluminium active conductors
- Cl 5.3.3.1.3 Note 1K values for the protective earthing conductor adiabatic equation
表格最后核对于 27 Sept 2026。
相关工具
这是否有用？
有问题，或数值看起来有误？联系我们。