コンタクタ,サーキットブレーカー,ソーラーインバーター,電気メーター,太陽電池
Model Designation Interpretation (Speculative, Based on 3VT8 Series Naming Rules)
The model “3VT8-63H102” provided by the user is a simplified version; the complete model usually contains more detailed information. The speculative meaning of each part is as follows:
| モデルセグメント | Speculative Meaning | 説明 |
| 3VT8 | Siemens SENTRON 3VT8 Series 配線用遮断器 | 製造中止, replaced by 3VA/3VM/3VC series |
| 63 | 定格電流 (で): 63あ | Maximum current for long-term operation at 40掳C ambient temperature |
| H | 遮断容量クラス: Class H (50の) | Breaking capacity classes of 3VT8 series: Class N (25の), Class H (50の), Class L (65の) |
| 102 | Speculated as a combination of frame current + pole number/trip unit type | 100フレーム (VT100), 2-pole configuration, Thermal-Magnetic Trip unit (TMF) |
Most Probable Corresponding Complete Models: 3VT8106-1AA03-0AA0 (3-ポール, 63あ, Class H breaking capacity, TMF trip unit) or 3VT8106-1AA04-0AA0 (4-ポール)
- コア仕様パラメータ (Based on 3VT8 100H 63A TMF)
| パラメータ項目 | Specification Value | 説明 |
| 製品タイプ | 配線用遮断器 (MCCB) | Used for overload and short-circuit protection in power distribution systems |
| フレーム電流 (Iu) | 100あ | VT100 frame, compatible with a maximum rated current trip unit of 63A |
| 定格電流 (で) | 63あ | Rated operating current at 40掳C ambient temperature |
| 究極の制動能力 (ICU) | 50の (415/440Vと) | Class H breaking capacity, meeting the requirements of industrial power distribution systems |
| トリップユニットの種類 | Thermal-Magnetic Trip unit (TMF) | 過負荷保護 (thermal element): inverse time characteristic; 短絡保護 (magnetic element): instantaneous tripping |
| 極数 | 3-pole or 4-pole | 3-pole is commonly used in power distribution systems; 4-pole is adopted when neutral wire protection is required |
| 定格動作電圧 (うえ) | 400/415Vと | Suitable for three-phase industrial power distribution systems |
| 定格絶縁電圧 (ウイ) | 690Vと | IEC準拠 60947-2 標準 |
| 動作温度 | -25C ~ +70C | Derating is required when the temperature exceeds 40C |
| 配線方法 | Front Panel Wiring | Rear panel wiring or plug-in connection is optional |
| 操作方法 | Rotary Handle | Electric operating mechanism is optional for remote control |
Ⅲ. Product Features and Advantages
- 高い信頼性: A member of Siemens SENTRON series, compliant with the international IEC 60947-2 標準.
- 高い遮断容量: Class H 50kA breaking capacity, effectively interrupting short-circuit faults and protecting equipment safety.
- Flexible Configuration: Compatible with a variety of accessories (補助接点, 警報接点, シャントリリース, undervoltage release, 等).
- 安全設計: Lockable rotary operating mechanism to prevent misoperation; Terminal cover protection for enhanced safety.
- コンパクトなサイズ: Saving switchgear space, facilitating installation and maintenance.
- 典型的なアプリケーションシナリオ
- Industrial Power Distribution Systems: Used as incoming/outgoing circuit breakers in distribution boxes to protect cables and lines.
- Motor Protection: Serves as protection equipment for direct starting of three-phase squirrel-cage motors, providing overload and short-circuit protection.
- Transformer/Capacitor Protection: Protecting distribution transformers and compensation capacitors to prevent fault expansion.
- Main Switch/Emergency Stop Switch: Combined with a lockable operating mechanism, used as the main switch and emergency stop control for equipment or systems.
- Building Automation: Applied in power distribution protection for lighting, air conditioning and other systems in commercial buildings and industrial plants.
- Important Notes and Alternative Solutions
- 製品の状態
The 3VT8 series was officially discontinued in January 2024 and fully replaced by Siemens’ new-generation 3VA/3VM/3VC series molded case circuit breakers. The 3VT8 series is no longer in production, with only limited spare parts support available.
- Recommended Alternative Models (Based on 63A, Class H Breaking Capacity, 3-ポール, TMF Trip Unit)
| Alternative Series | 推奨モデル | 利点 |
| 3VA1 Series | 3VA1063-3ED36-0AA0 | Higher breaking capacity (25kA→36kA), more advanced tripping technology, richer accessory options |
| 3VM Series | 3VM1063-1EA00-0AA0 | 費用対効果の高い, suitable for basic power distribution applications, easy to install |
| 3VC Series | 3VC1063-1AA00-0AA0 | Thermal-magnetic and electronic trip units optional, high intelligence level, supporting communication functions |
- 使用上の注意
- Derating Operation: 周囲温度が40℃を超える場合, the rated current must be derated according to the temperature coefficient.
- Accessory Matching: Pay attention to matching the accessory with the circuit breaker model and pole number when selection, such as the voltage level of the shunt release.
- 設置仕様: Ensure installation in a switchgear that meets requirements, with proper ventilation and heat dissipation maintained.
- 定期メンテナンス: Periodically inspect the circuit breaker appearance, operating mechanism and trip unit performance to ensure reliable operation.
- Replacement Suggestion: For new projects, it is recommended to directly select 3VA/3VM/3VC series alternative products to achieve better performance and a longer service life.
