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3RV1374-7GN10｜SIEMENS SIRIUS High‑Performance Motor Protection Circuit‑Breaker (MPCB)
Full Model: 3RV1374-7GN10 (Siemens SIRIUS 3RV1 series, moulded case circuit‑breaker with enhanced breaking capacity for starter combinations)
ブランド: Siemens SIRIUS Industrial Control Series
- Detailed Model Breakdown
| Model Part | 意味 | Key Description |
| 3RV1 | シリーズ | SIRIUS 3RV1 series, moulded case motor protection circuit‑breaker, designed with enhanced breaking capacity for starter combinations |
| 374 | Size | Large size, rated current 400A, suitable for 200kW three‑phase motors at 400V |
| 7 | Breaking Capacity Class | Enhanced breaking capacity, up to 200kA@400V |
| G | Trip Type | Electronic trip unit, short‑circuit protection adjustable from 1–10 × In |
| N | 繋がり | Screw terminals, with phase barriers for safe and reliable connection |
| 10 | Number of Poles | 3 極 (3P3d), for three‑phase motor protection circuits |
- Core Technical Data
| Item | Specification | 注意事項 |
| Rated Operational Current (で) | 400あ (fixed) | For 200kW three‑phase induction motors at 400V |
| 定格電圧 (うえ) | 690Vと | For medium‑high voltage industrial motor control systems |
| 定格絶縁電圧 (Ui) | 1000Vと | Higher than operating voltage, large safety margin |
| Ultimate Breaking Capacity (ICU) | 200kA@400V | Enhanced breaking capacity for heavy short‑circuit faults |
| 極 | 3 極 (3P3d) | Standard three‑phase motor protection |
| Trip Characteristic | Magnetic only (short‑circuit protection only) | Electronic trip, short‑circuit adjustable 1–10×In; must be used with overload relay |
| Operation | Rotary ON/OFF actuator | Manual control, simple and clear |
| 取り付け | Panel mounting | Suitable for control cabinet integration |
| Degree of Protection | IP30 | Standard for switchgear installation |
| Applicable Standard | IEC 60947‑4‑1 | International standard for motor protection devices |
- Key Features & Applications
Main Advantages
- Ultra‑high breaking capacity: 200kA@400V, withstands heavy short‑circuit faults in industrial networks
- Precise protection: Electronic trip with adjustable short‑circuit protection for various motor starting characteristics
- Reliable connection: Screw terminals with phase barriers to prevent phase‑to‑phase short circuits
- System integration: Designed for starter combinations, works perfectly with contactors and overload relays
- Durable design: Industrial‑grade quality, suitable for harsh environments and long mechanical life
代表的な用途
Large industrial motor control centers (MCC), 400V/690V systems
Short‑circuit protection for three‑phase induction motors up to 200kW at 400V (must be used with overload relay)
High‑power motor protection in metallurgy, mining, paper and other heavy industries
Large continuous‑duty equipment: コンプレッサー, ファン, pumps
Main drive motors in production lines with frequent starting and fluctuating loads
- Replacement Models
Upgrades / Replacements (Same Brand)
| モデル | Key Data | Features | 応用 |
| 3VA2240‑0MS32‑0AA0 | 400あ, 200kA@400V, 3P, electronic trip | Upgrade replacement for 3RV1, new 3VA2 series MCCB | New projects requiring higher performance and communication |
| 3RV1374‑7KN10 | 400あ, 200kA@400V, 3P, electronic trip | Different terminal configuration | Same rating, different connection requirements |
| 3RV1374‑7GN20 | 400あ, 200kA@400V, 4P, electronic trip | 4‑pole version with neutral protection | Three‑phase four‑wire systems needing neutral protection |
Cross‑Brand Alternatives
| ブランド | モデル | Matching Specifications |
| ABB | Tmax T4H 400 PR221DS | 400あ, 100kA breaking, electronic trip, 3P |
| シュナイダー | TeSys GV4‑ME400 | 400あ, 100kA breaking, thermal‑magnetic trip, 3P |
| 三菱 | NF400‑SEW | 400あ, 100kA breaking, electronic trip, 3P |
- Protection coordination: This unit provides magnetic only (short‑circuit) protection and must be used with an overload relay (e.g. 3RU series) for complete motor protection.
- Breaking capacity matching: Selected based on system short‑circuit calculation; 200kA suits most industrial grids.
- Wiring: Screw terminals for copper/aluminum cables; observe cross‑section and torque specifications.
- Mounting space: Large frame size requires sufficient cabinet space.
- Upgrade recommendation: Some 3RV1 models are discontinued; 3VA2 series is recommended for new projects for advanced protection and communication.
- Accessories: Auxiliary contacts, alarm contacts available for motor status monitoring and control.
