配电箱分隔形式检查器
检查配电箱的分隔、通道和净距。
Reads AS/NZS 3000:2018. Tables checked 26 Sept 2026.
尝试一个工程 5
每项工作都会预填示例数值。请替换为您自己的数值。
- Check the access to a main switchboardThe access clearances and separation rules for an 800 A main switchboard.
- Check access to a house switchboardThe clear space a domestic switchboard needs.
- Check a long board for two exitsWhether a 3.6 m board needs two exits.
- Check a board in a cupboardThe access for a 400 A board that is not in a room.
- Check the impulse clearancesThe clearance for a 6 kV impulse withstand.
输入
使用默认输入值的示例计算。
- 每相配电盘额定值
- 400 A
- 配电盘长度
- 2 m
- 住宅安装
- 否
- 额定冲击耐受电压 Uimp
- 6 kV，装置电源进线端
- 配电盘位于需进入后方可接近的房间内
- 是
- 配电板前方留出净空
- 0 m
Cl 2.5.5 适用于该配电板
否
- 进线电源导体，Cl 2.5.5.1
- 不需要
- 内部隔离，Cl 2.5.5.2 途径
- 不需要
- 适合该路径的形式，附录 K 示例
- 3b or 4a or 4b
- 距每个需要检修的面的净空
- 1m
- 配电板周围的无阻挡空间
- 0.6m
- 应急出口通道
- 足以撤离，未设数量
- Uimp 6 kV 时的净距，附录 K 示例
- 5.5mm
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- Cl 2.5.5 适用于此配电板结果否
AS/NZS 3000:2018 Cl 2.5.5
- 绝缘或隔离进线导体，Cl 2.5.5.1不需要
AS/NZS 3000:2018 Cl 2.5.5
- 内部隔离，Cl 2.5.5.2 途径不需要
AS/NZS 3000:2018 Cl 2.5.5
- 可接受的隔离形式，任选其一，App K example3b or 4a or 4b
AS/NZS 3000:2018 App K Para K6.2
- 可接受的形式后缀，App K examplei, h, ih
AS/NZS 3000:2018 App K Para K6.2
- 各形式的隔离对象，App K exampleTable K2
AS/NZS 3000:2018 App K Table K2
- 距每个需要检修的面的净距1m
AS/NZS 3000:2018 Cl 2.10.2.2
- 配电箱周围无阻碍空间0.6m
AS/NZS 3000:2018 Cl 2.10.2.2
- 应急出口通道足以撤离，未设数量
AS/NZS 3000:2018 Cl 2.10.2.2
- 门洞最小净宽该配电板无对应数值
AS/NZS 3000:2018 Cl 2.10.2.2
- 门洞最小净高该配电板无对应数值
AS/NZS 3000:2018 Cl 2.10.2.2
- Uimp 6 kV，App K example 处的过电压类别IV
AS/NZS 3000:2018 App K Para K6.4
- Uimp 6 kV 处的净空，App K example5.5mm
AS/NZS 3000:2018 App K Para K6.4
- Uimp 6 kV 处的替代试验电压，kV 有效值，App K example5.1
AS/NZS 3000:2018 App K Para K6.4
- 爬电距离，Ui 440 V，污染等级 3，材料组 III，App K example6.3mm
AS/NZS 3000:2018 App K Para K6.5
关于此计算器
How this is calculated
The tool checks whether Clause 2.5.5 of AS/NZS 3000:2018 asks for separation inside a switchboard. It also reads the access and exit figures of Clause 2.10.2.2 and the Appendix K examples.
- Scope. It compares the board rating with the Cl 2.5.5 threshold. At or above it, Cl 2.5.5 applies.
- Incoming conductors. Where Cl 2.5.5 applies, the incoming supply conductors are insulated or separated (Cl 2.5.5.1).
- Internal separation. The tool says if the Cl 2.5.5.2 route needs internal separation. It lists the forms that suit that route, from Paragraph K6.2 and Table K2.
- Access. From Cl 2.10.2.2 it gives the clearance from each face that needs access. It also gives the unimpeded space around the board. A domestic board has its own front clearance.
- Exits. A switchroom can pass the rating or length trigger. Then the tool gives the exit count and doorway size.
- Clearance example. It reads the Appendix K clearance for the impulse voltage you pick (Paragraphs K6.4 and K6.5).
| Step | Table or clause | What it decides |
|---|---|---|
| Scope and separation | AS/NZS 3000 Cl 2.5.5 | Whether the board needs separation |
| Forms | App K Para K6.2 and Table K2 | The forms that suit |
| Access and exits | Cl 2.10.2.2 | Clearances, exits and doorways |
| Clearances | App K Para K6.4 and K6.5 | The worked examples |
Worked example
A 1000 A commercial board in a switchroom. Cl 2.5.5 applies and internal separation is required. Forms 3b, 4a or 4b suit. The tool gives 2 exit paths, set well apart. The Appendix K clearance at 6 kV is 5.5 mm.
Limits
- Appendix K is informative. Its clearance and creepage figures are examples. Verify them to AS/NZS 61439.1.
- The tool holds the Cl 2.5.5.2 route only. Cl 2.5.5.1 offers other routes.
- Under the trigger, the tool gives no exit count and no doorway size.
- Measure each clearance with the doors and gear in the positions the clause names.
- Door swing and hold-open rules appear as warnings only.
See also: Industrial switchboards, Switchboard fault rating and busbar withstand and the fault rating calculator.
问题
结果仅供设计参考。请依据现行标准核对。
配电箱何时需要内部分隔？
AS/NZS 3000:2018 Clause 2.5.5 适用于每相 800 A 及以上的配电箱。输入额定值后，AmpSize 会告知该配电箱是否满足该触发条件。Clause 2.5.5.1 还要求对每条路径上的进线导体进行绝缘或分隔。Clause 2.5.5.2 随后规定了配电箱所需的内部分隔。
接受哪些分隔形式？
Appendix K Paragraph K6.2 列出 Form 3b、Form 4a 和 Form 4b，以及带 i、h 和 ih 后缀的相同形式。Table K2 显示各形式所分隔的内容。Appendix K 为资料性附录，因此应将这些视为通向 Clause 2.5.5.2 的示例路径，而非标准所规定的数值。
配电箱周围需要多大空间？
Clause 2.10.2.2.1 规定，需要操作的每个面须留出 1.0 m。家用装置可在配电箱正面采用 0.6 m。AmpSize 对正面采用该放宽值，其他面仍保持 1.0 m。该条款规定配电箱周围应有 0.6 m 无障碍空间。请阅读该条款，了解其所假定的门和开关设备位置。
何时需要两条紧急出口路径？
Clause 2.10.2.2.2 规定，若必须进入房间才能接近配电箱，则应设两条相距较远的出口通道。每相 800 A 及以上，或长度超过 3 m 时适用。若门打开且设备抽出时，前方仍保持 3 m 通道，则一条通道即可。其他配电箱需要足够的出口通道，但不规定具体数量。
工具读取哪个版本，又遗漏了什么？
该工具依据 AS/NZS 3000:2018 并纳入修订 1、2 和 3。修订 2 重写了 Clause 2.10.2.2。修订 3 仅删除了 Clause 2.5.5 中对 AS/NZS 3439 的引用。工具收录 Clauses 2.5.5 和 2.10.2.2，以及Appendix K 的段落 K6.2、K6.4 和 K6.5。额定同时系数和温升检查属于 AS/NZS 61439 系列，因此本工具两者均未收录。
计算示例
背景
本工具读取的条款和表格
- AS/NZS 3000:2018 App K Para K6.2Form of internal separation
- AS/NZS 3000:2018 App K Para K6.4Overvoltage category
- AS/NZS 3000:2018 App K Para K6.5Creepage
- AS/NZS 3000:2018 App K Table K2Internal separation, the least each form needs
- AS/NZS 3000:2018 Cl 2.5.5Protection against arcing faults inside a switchboard
- AS/NZS 3000:2018 Cl 2.10.2.2Switchboard access and emergency exits
- AS/NZS 3000:2018 Cl 2.5.5, Cl 2.10.2.2 and App K Table K2Switchboard internal separation, access and clearances
表格最后核对于 26 Sept 2026。
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有问题，或数值看起来有误？联系我们。