Network planners selecting a load break switch inside an RMU must separate normal load switching duty from fault-making and fuse/breaker protection roles before comparing outdoor cable-ring quotations.
This load break switch guide focuses on practical procurement and layout controls for the package below. Pair the checklist with the approved single-line for load-break-switch-rmu-selection-guide —それは、電力会社やコンサルタントの承認に代わるものではありません。.
A load break switch is sized for switching load current under defined conditions — it is not automatically a short-circuit interrupter. Ring schemes often combine load break ways with fuse-switch or circuit-breaker functions on transformer feeders.
Write the functional role of each way on the single-line so vendors cannot substitute a look-alike cubicle with the wrong duty class.
関連読書： ring main unit RMU selection guide そして outdoor ring main unit cable entry planning.
| Selection input | Network risk if vague | 所有者 |
|---|---|---|
| Rated voltage / insulation | Wrong clearance class | Network SLD |
| Load break current rating | Unsafe switching duty | Operating study |
| Short-time / fault-making rating | Cubicle damage on faults | 故障解析 |
| Number of ring / tee ways | Wrong enclosure footprint | Feeder plan |
| Cable type and entry direction | Civil trench rework | Cable design |
| SF6 / alternative gas notes | Handling & environmental compliance | HSE / ops |
| Motorization / remote control | SCADA interface gap | Automation team |
重要： For load break switch, freeze these inputs on a controlled revision before normalizing commercial bids; late changes cascade into civil, protection, and factory drawings — align with IEC規格の実践 そしてプロジェクト権限のソースノート。.
Outdoor RMUs need gland plates and bending radii that match MV cable specs. Grounding continuity between tank, cable screens, and the earthing grid should be verified before backfill.
If SF6 is used, retain handling, leak-check, and end-of-life recovery notes in the O&M pack — treat them as controlled environmental documents.
| Item | 目的 | 引用付きで送信 |
|---|---|---|
| Way function matrix (LBS / fuse / CB) | Duty clarity | Yes — locked |
| Rated currents and fault duties | Network match | Yes — study refs |
| Cable entry GA and gland schedule | Civil interface | Yes — before PO |
| Gas type and handling procedure | HSE compliance | Yes — with O&M |
| Interlock and earthing notes | Safe operation | Yes — ops sign-off |
| Routine test certificates | Factory evidence | Yes — FAT list |
| Remote / motor option datasheet | SCADA integration | If specified |
ベンダーがカタログの抜粋ではなく比較可能な技術パッケージを提出するように、このテーブルをすべてのRFQ改訂版に添付してください。.
Verify mechanical operation of each load break way, earthing switch position indications, and cable sheath bonds. Record gas pressure (where applicable) against the nameplate band.
Do not close onto a live ring until protection on tee-offs is proven and the operating sequence is filed with the control room.
For many load break switch scopes, begin engineering review with Shenheng Power’s SF6 gas insulated ring main unit (RMU) 製品ページに記載されているカタログエントリー。.
アプリケーションの制限： のための load break switch (load-break-switch-rmu-selection-guide)、リンクされたカタログページはエンジニアリングの出発点としてのみ扱ってください。 ではない フリーズ load break switch プロジェクトの故障スタディ、高度ディレーティング、またはユーティリティの型式承認の包絡線が、該当する製品ページの公開定格を超過する場合の調達。.
If the load break switch study points to a different scheme or rating for load-break-switch-rmu-selection-guide, browse the カテゴリページ 学習資料も送信してください 申衡電力へ連絡する.
Load break covers defined load-current switching; fault-making and interrupting duties require ratings proven for short-circuit conditions.
Freeze ring and tee ways on a function matrix tied to the network plan before requesting enclosure GA drawings.
When compact outdoor footprints and proven gas-insulated modules fit the site — still subject to local environmental handling rules.
Short-time withstand and any fault-making claims must match prospective fault levels at the installation point.
Gland plate size, entry direction, and bending radius mismatches with trenches or ducts.
Leak-check procedures, recovery requirements, and O&M references should travel with the equipment dossier.
申恒電力設備有限公司.
