电动汽车充电器回路计算器
检查电动汽车充电器的备用容量、电缆截面和 RCD。
Reads AS/NZS 3000:2018. Tables checked 1 Oct 2026.
尝试一个工程 9
每项工作都会预填示例数值。请替换为您自己的数值。
- Charge an EV from a home socket‑outletThe circuit a mode 2 charging lead needs on a home socket‑outlet.
- Check spare capacity for an EV chargerWhether a 7 kW charger fits a 63 A board that already carries 40 A.
- Add EV chargers to an Australian car parkWhether four 22 kW chargers fit a 400 A board, with and without load management.
- Add a 22 kW charger to a houseThe cable, RCD and headroom for a three‑phase charger.
- Add a charger with load managementThe headroom when the charger is limited to 16 A.
- Add a second charger to a houseThe headroom with two 32 A chargers.
- Choose a charger RCD without d.c. detectionThe RCD type when the station has no 6 mA d.c. detection.
- Size a long charger runThe cable for a 32 A charger 40 m from the board.
- Add six chargers to an apartment car parkThe demand and supply for six chargers in New Zealand.
输入
使用默认输入值的示例计算。
- 国家
- 新西兰 · Clause 7.9
- 充电模式
- 模式 3
- 安装
- 住宅电气安装
- 充电器数量
- 1
- 充电器供电
- 单相
- 充电器额定电流
- 32 A
- 配电盘供电
- 单相
- 总开关或供电额定值
- 0 A
- 不含充电器的最大需量
- 0 A
- 负荷管理装置
- 否
- 敷设长度
- 20 m
- 敷设方式
- 在空气中封闭敷设
- 材料
- 铜
- 绝缘
- PVC 75 °C
- 充电器 SDoC
- 未说明
- SDoC 版本
- 未说明
- SDoC 日期
- 未说明
- 已安装 RCD
- 未记录
- RCD 标识文字
- 未说明
- RCD 位置
- 未说明
- 负荷控制
- 未记录
- 需求响应
- 未记录
电缆截面
6mm²
- 备用容量
- 未评估
- 剩余电流装置
- 30 mA B 型，每根带电导体均须单独隔离
- 充电器需量
- 32A
- 单相末端分路最小容量
- 32A
- 隔离开关
- 32A
- 需阅读的条款
- AS/NZS 3000:2018 Cl 7.9.3.3
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- 本数值所依据的条款7.9.3.3
AS/NZS 3000:2018 Cl 7.9.3.3
- 单相末端分路最小容量32A
AS/NZS 3000:2018 Cl 7.9.3.3
- 终端分支回路上的其他点位无，该条款将其排除
AS/NZS 3000:2018 Cl 7.9.3.3
- 最大额定剩余电流30mA
AS/NZS 3000:2018 Cl 7.9.3.3
- 剩余电流装置类型B
AS/NZS 3000:2018 Cl 7.9.3.3
- 剩余电流装置配置每根带电导体（含中性线）均应设置独立器件
AS/NZS 3000:2018 Cl 7.9.3.3
- 例外情形中的替代器件A with RDC-DD
AS/NZS 3000:2018 Cl 7.9.3.3
- RDC-DD 检测水平，取自 NOTE6mA
AS/NZS 3000:2018 Cl 7.9.3.3
- 最小隔离开关额定值32A
AS/NZS 3000:2018 Cl 7.9.3.3
- 距地面或地坪的最小高度800mm
AS/NZS 3000:2018 Cl 7.9.3.3
- 在负载最重相上计入的充电器1
- 计入的额定电流比例100%
AS/NZS 3000:2018 Table C1 group (j)(iv)
- 负载最重相的充电器需量32A
AS/NZS 3000:2018 Table C1 group (j)(iv)
- 电缆设计电流32A
- 电缆规格结果6mm²
AS/NZS 3008.1.2:2017
- 该规格下的电压降2.09%
AS/NZS 3008.1.2:2017
关于此计算器
How this is calculated
The tool checks an EV charger circuit. It reads Clause 7.9.3.3 of AS/NZS 3000:2018 for the circuit, the RCD and the isolating switch. It reads Table C1 for the charger demand. It then takes a cable size from the cable size calculator.
- Circuit rules. The tool prints the minimum final subcircuit capacity and the other points allowed on it. It also prints the isolating switch rating (Cl 7.9.3.3).
- RCD. It prints the maximum rated residual current, the type and the arrangement of the device. It also lists the Exception that allows a device with RDC-DD.
- Charger demand. It counts the chargers on the heaviest phase. It applies the share of rated current that group (j)(iv) of Table C1 counts. Load management can set a lower limit.
- Spare capacity. It subtracts your maximum demand from the supply rating. It then subtracts the charger demand.
- Cable. It takes the design current for the charger. It sizes the cable and gives the drop over your run.
| Step | Table or clause | What it decides |
|---|---|---|
| Circuit and switch | Cl 7.9.3.3 | The capacity, the points and the isolator |
| RCD | Cl 7.9.3.3 | The type, the rating and the arrangement |
| Charger demand | Table C1 group (j)(iv) | The current counted for each charger |
| Cable | AS/NZS 3008.1.2 | The size and the drop for the run |
Worked example
- 32 A Mode 3 charger on a 63 A supply with a 40 A demand. The charger is 20 m from the board. The tool finds the board short by 9 A. It gives a 6 mm² cable with a 2.09 % drop.
Limits
- The tool reads the clause and prints its figures. It is a pointer to the clause, not a ruling on a design.
- Clause 7.9 adds to Sections 2 to 7. A figure the tool does not report can still come from those Sections.
- The clause prints a capacity figure for single‑phase circuits only. It prints none for a three‑phase circuit.
- The RDC-DD level comes from a NOTE. A NOTE is not a requirement.
- The cable uses the default inputs of the cable size tool. Open that tool to set grouping or ambient.
- The tool reads the 2018 edition with Amendments 1, 2 and 3. It does not read the supply authority rules.
- The install record lists what to check and keep, with each source. You tick the rows. The tool judges none of them.
See also: Clause 7.9 and EV charging in NZ, EV charging load and spare capacity and EV charger spare capacity on a 63 A main switch.
问题
结果仅供设计参考。请依据现行标准核对。
电动汽车充电器工具有什么作用？
本工具对照配电箱处的备用容量检查充电器，选定电缆截面，并指明所需的 RCD。在新西兰，依据 AS/NZS 3000:2018 Clause 7.9。对于家用 Mode 2，增加 Clause 2.6.3.3.1 规定的 30 mA，Clause 7.9.1 保持其有效。Clause 7.9.3.3 仅对单相终端分支回路列出 32 A 容量。
备用容量检查的原理是什么？
按相输入总开关额定值及不含充电器的最大需量。两者之差即为备用容量。本工具将每台充电器按其额定电流计入负荷最重的一相：新西兰住宅依据 Table C1 第 (j)(iv) 组，其他情况依据 Appendix P Paragraph P2。若设有负荷管理，则在未管理情况旁边显示已管理的情形。
工具针对澳大利亚读取什么内容？
Clause 2.2.1.4 引用 Appendix P，该附录为资料性附录。P4.1 规定每个充电点应配备至少为 A 型的 30 mA 装置。Mode 3 或 Mode 4 插座还需增加直流措施：B 型，或带 6 mA 直流检测的 A 型。若充电器自身能检测直流故障电流，则采用 A 型。
工具对 Mode 3 报告哪些剩余电流装置数据？
见 Clause 7.9.3.3 及其例外条款。该条款要求在每根带电导体（包括中性线）上设置独立的 B 型 30 mA 装置。对于 Mode 3，例外条款改为规定采用 Type A 配 RDC-DD。6 mA RDC-DD 的数值位于注释中，而非条款正文中。本工具将其标注为注释。
这是对我的装置是否合规的裁定吗？
否。条款数字仅指向相应条款编号。备用容量检查比较您输入的数值，电缆由电缆截面工具给出。持证电气工作人员应阅读这些条款，并判断其如何适用于眼前的工作。
本工具读取的条款和表格
- AS/NZS 3000:2018 App P Para P2Maximum demand of charging points
- AS/NZS 3000:2018 App P Para P4.1Residual current devices for charging points
- AS/NZS 3000:2018 Cl 2.2.1.4Electric vehicle charging circuits
- AS/NZS 3000:2018 Cl 2.6.3.3.1Additional protection in New Zealand, residential
- AS/NZS 3000:2018 Cl 7.9.1Scope of Clause 7.9, electric vehicle supplies
- AS/NZS 3000:2018 Cl 7.9.2.1Source of supply for electric vehicle charging
- AS/NZS 3000:2018 Cl 7.9.2.2Socket‑outlets for Mode 1 charging
- AS/NZS 3000:2018 Cl 7.9.3.2Facilities for Mode 2 charging
表格最后核对于 1 Oct 2026。
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有问题，或数值看起来有误？联系我们。