現代の電気システムにおけるLsig遮断器の利点を探る
LSIG functions give an engineer separate protection settings; they do not automatically make a system selective or safe at any setting. The benefit depends on the circuit study and the exact release supplied.
MCCBの構成 必要な基準に沿って選定されるべきです 保護機能 そして、電気的な使用量も記録されています。.
ガイドへの 成形ケース式遮断器 フレームサイズ、評価、トリップ動作の違いを説明します。.
Test and govern the settings
| ステージ | 保持すべき証拠 |
|---|---|
| Study | Source assumptions and coordinated curves |
| Configuration | Exact release, sensor and neutral arrangement |
| Test | Manufacturer-approved method and results |
| 引き渡し | As-left settings and authorised revision |
| Change | Reassessment and updated test record |
IEC 60947-2 product declarations do not approve an arbitrary delay or sensing arrangement. Follow the release’s test instructions, recognising the different scope of primary and secondary injection. Include test equipment, engineering, spares and inspection in lifecycle cost. Ask W9 for exact LSIG release documents rather than a broad claim of advanced protection.
「use」を MCCBの技術要件 仕様を注文コードとプロジェクトファイルと比較してください。.
Assign each LSIG function a design job
Long-time pickup and delay protect the sustained-load region within the conductor limit. Short-time delay can support downstream discrimination but increases exposure while a fault persists. Instantaneous pickup must be reviewed against permitted inrush and fault-disconnection needs. Ground-fault sensing must match the earthing and neutral arrangement.
| 機能 | デザインのインプット | 確認 |
|---|---|---|
| L | Load and conductor ampacity | Pickup and overload curve |
| S | Downstream protection | Selectivity and withstand |
| I | Inrush and fault level | High-current response |
| G | Earthing and sensing | Pickup, delay and neutral path |
The resulting settings need authorisation, commissioning and change control. Do not disable a function to obtain a cleaner curve without reviewing the resulting protection gap. An LSIG label does not establish a 30 mA residual-current function or a communication interface.
よくある質問
What does LSIG stand for?
Long-time, short-time, instantaneous and ground-fault protection. Confirm which functions and setting ranges are present in the exact release.
Does LSIG guarantee selective coordination?
No. Selectivity depends on the actual devices, settings and fault levels. Complete the 調整研究 and verify the approved settings.
Is G the same as an RCD’s additional shock protection?
Not automatically. Sensitivity, waveform response and sensing arrangement can differ substantially. Verify the required function separately.
Can settings be changed whenever loads change?
Changes require an approved protection review and updated records. Re-test as required and preserve conductor and equipment protection.
参考文献
提案された構成を確認するには、, W9グループへのお問い合わせ 負荷スケジュールにより利用可能 故障電流 そして、目的地市場の要件。.