シーメンス B2125 125-Amp 二極遮断器取扱説明書

1. はじめに

This manual provides essential information for the safe installation, operation, and maintenance of the Siemens B2125 125-Amp Double Pole Circuit Breaker. Please read this manual thoroughly before attempting any installation or operation. Retain this manual for future reference.

2. 安全情報

警告: 感電または火災の危険があります。

• この回路ブレーカーの取り付けとメンテナンスは、資格のある電気技術者のみが行う必要があります。
• Always disconnect power at the main service panel before working on electrical equipment. Verify that power is off using a voltageテスター。
• Follow all local and national electrical codes and regulations.
• Do not use this circuit breaker if it appears damaged.
• Ensure proper wire sizing and torque specifications are met for all connections.

3 製品の特徴

The Siemens B2125 is a reliable thermal-magnetic circuit breaker designed for panel board mounting. Key features include:

• Type BL: Specifically designed for Siemens panel boards.
• Double Pole: Provides protection for two electrical phases or a single 240-volt circuit.
• 125-Amp 評価: Suitable for circuits requiring up to 125 amp保護のエリア。
• 10KAIC Interrupting Rating: Capable of safely interrupting fault currents up to 10,000 Ampそうです。
• ボルトオンマウント: Ensures secure and stable connection within the panel board.
• ULリスト： 安全性とパフォーマンスの基準に認定されています。

4. セットアップとインストール

Installation of the Siemens B2125 circuit breaker requires adherence to safety protocols and electrical codes. This is a general guide; consult a qualified electrician for specific installation requirements.

1. 電源切断: Turn off the main power supply to the electrical panel at the utility meter or main disconnect. Verify zero voltag適切なテスト装置を使用します。
2. パネルアクセス: 電気パネルのカバーを慎重に取り外して、バスバーと配線領域を露出させます。
3. ブレーカーの配置: Identify an available space on the panel board's bus bar compatible with a bolt-on type BL breaker.
4. 取り付け: Align the circuit breaker's bolt-on connectors with the bus bar terminals. Securely fasten the breaker to the bus bar using the provided bolts, ensuring a tight electrical connection.
5. 配線： Connect the load wires to the appropriate terminals on the circuit breaker. For a double pole breaker, connect one phase wire to each terminal. Ensure the wires are stripped to the correct length and inserted fully into the terminals. Tighten the terminal screws to the torque specifications indicated on the breaker or in the panel documentation.
6. パネルカバー: すべての接続が確実に行われ、確認されたら、電気パネルのカバーを元に戻します。
7. 電力の回復: メインサービスパネルへの電源を復元します。

Figure 1: Siemens B2125 125-Amp Double Pole Circuit Breaker, front-side view, showing the 125 amp rating and product labels.

図2: 前面 view of the Siemens B2125 circuit breaker, highlighting the 125 amp trip indicators and terminal screws.

5. 操作手順

The Siemens B2125 circuit breaker operates automatically to protect electrical circuits from overcurrents and short circuits. It has two primary states: ON and TRIPPED/OFF.

• オンの位置： When the handle is in the 'ON' position, power is supplied through the breaker to the connected circuit.
• トリップ位置: In the event of an overcurrent or short circuit, the breaker will automatically move to a 'TRIPPED' position (often midway between ON and OFF) to interrupt the power flow and protect the circuit.
• 落ちたブレーカーをリセットする: To restore power after a trip, first move the handle fully to the 'OFF' position, then push it firmly to the 'ON' position. If the breaker immediately trips again, there is likely a persistent fault in the circuit that needs to be investigated by a qualified electrician.

6. メンテナンス

Circuit breakers generally require minimal maintenance. However, periodic visual inspection is recommended.

• 目視検査: Annually, or as local codes require, have a qualified electrician inspect the circuit breaker and its connections for any signs of overheating, loose wires, or physical damage.
• クリーニング： Ensure the area around the breaker is free from dust and debris. Do not use liquids for cleaning inside the electrical panel.
• テスト: Do not routinely test the trip mechanism by intentionally creating a fault. This can stress the breaker and connected equipment.

図3：側面 view of the Siemens B2125 circuit breaker, showing its compact design and mounting points.

7。 トラブルシューティング

If your Siemens B2125 circuit breaker is not functioning as expected, consider the following:

• ブレーカーが頻繁にトリップする: This indicates an overload or a short circuit in the connected wiring or appliances. Disconnect appliances from the circuit and try resetting the breaker. If it still trips, consult a qualified electrician to identify and resolve the underlying electrical fault.
• ブレーカーがリセットされない: If the breaker handle does not stay in the 'ON' position after being moved to 'OFF' and then 'ON', there is likely a persistent fault. Do not force the handle. Contact a qualified electrician.
• 回路に電力が供給されていません（ブレーカーがオン）： Ensure the main power supply to the panel is active. Check for loose connections at the breaker terminals (only by a qualified electrician with power off). If the issue persists, professional diagnosis is required.

8. 仕様

図4：背面 view of the Siemens B2125 circuit breaker, displaying the bolt-in connectors and additional product labeling.

9. 保証情報

Siemens strongly recommends against the use of "used" breakers. The installation of used breakers in a Siemens panel will void the warranty on the panel. Siemens does not sell used breakers and has not approved any third-party sellers to do so. For specific warranty details, please refer to the official Siemens warranty documentation or contact Siemens customer support.

10. サポートとお問い合わせ

For technical assistance, product inquiries, or to locate authorized service centers, please visit the official Siemens website or contact their customer support directly. Always provide the model number (B2125) when seeking support.

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