SIEMENS 3RV2021-4CA15-Z X95 Motor Protection Circuit Breaker (MPCB)

‌1. Product Name‌
SIEMENS 3RV2021-4CA15-Z X95 Motor Protection Circuit Breaker (MPCB)

‌2. Product Brief Introduction‌
The SIEMENS 3RV2021-4CA15-Z X95 is a Motor Protection Circuit Breaker (MPCB) from the Siemens SIRIUS 3RV series. It is an all-in-one, compact device engineered to provide comprehensive protection and control for three-phase electric motors by integrating short-circuit protection, adjustable thermal overload protection, and a manual switching/isolation function.

‌3. Product Description‌
The SIEMENS 3RV2021-4CA15-Z X95 is a highly integrated and reliable component within the Siemens SIRIUS 3RV family of motor protection devices. This Motor Protection Circuit Breaker (MPCB) offers a simplified and efficient solution for safeguarding and controlling electric motors in industrial applications. Its core function is to deliver comprehensive and coordinated electrical protection for a ‌SIEMENS MOTOR‌ against common and potentially damaging faults. The device combines instantaneous magnetic trip protection for high-level short-circuit currents—which can cause immediate, severe damage to the ‌SIEMENS MOTOR‌ windings and wiring—with an adjustable thermal overload mechanism. This thermal protection guards against sustained overloads, where the ‌SIEMENS MOTOR‌ operates above its rated current for too long, leading to dangerous overheating and insulation degradation. It also provides crucial protection against phase failure (single-phasing) and phase imbalances. Beyond protection, the 3RV2021-4CA15-Z X95 serves as a robust manual ON/OFF switch for the motor circuit and provides a safe isolation point for maintenance, enhancing operator safety. Its adjustable current setting feature allows for precise calibration to match the specific full-load ampere (FLA) rating of the connected ‌SIEMENS MOTOR‌, ensuring tailored and accurate operation. Designed for durability and performance in demanding industrial environments, it dramatically simplifies control panel design by eliminating the need for separate fuses, overload relays, and isolators. This integration results in reduced wiring complexity, saved panel space, and increased system reliability. The "-Z X95" suffix may denote specific configuration or accessory details. By integrating these multiple functions, this MPCB plays a critical role in enhancing operational safety, minimizing unplanned downtime, and extending the service life of the protected ‌SIEMENS MOTOR‌.

‌4. Product Model Number‌

‌5. Product Advantages‌

• ‌All-in-One Integrated Protection:‌ Combines short-circuit and thermal overload protection with a manual disconnect switch in a single unit, offering a complete, space-saving protection solution for a ‌SIEMENS MOTOR‌.

• ‌Simplified Panel Design & Installation:‌ Drastically reduces component count (eliminates separate fuse, overload relay, isolator), leading to simpler wiring, significant space savings, faster installation, and fewer potential failure points.

• ‌Accurate & Adjustable Motor Protection:‌ Features a user-friendly, adjustable thermal setting for precise calibration to the specific full-load current of the ‌SIEMENS MOTOR‌, ensuring optimal protection against overheating and phase-related faults.

• ‌Enhanced Operational Safety:‌ Functions as a reliable manual on/off switch and provides a safe, lockable isolation point for maintenance, improving overall personnel safety when working with the ‌SIEMENS MOTOR‌ system.

• ‌Reliable & Durable Performance:‌ Built to Siemens' stringent industrial standards, it offers clear status indication, dependable long-term performance, and durability in challenging operating conditions.

‌6. 【Website Analysis & Insights for www.wheat-auto.com】‌
Based on the provided, the website ‌www.wheat-auto.com‌ belongs to ‌Changzhou Wheat Automation Technology Co., Ltd.‌ The following insights into its business are generated:

The company operates as an ‌international supplier, distributor, and trader‌ of a broad range of industrial automation components and electronic products. It explicitly acts as a ‌trading and sourcing intermediary‌ and not a manufacturer, serving as a ‌one-stop sourcing channel‌ for branded components from numerous global suppliers. The website's multilingual design (English, Chinese, Russian) targets the ‌global B2B market‌ in industrial automation and manufacturing.

Prominent brands listed include ‌SIEMENS MOTOR‌, ‌ABB MOTORS‌, DeWalt, Endress&Hauser, Krohne, Honeywell, METTLER TOLEDO, Yokogawa, and others. The website’s “News” section functions as a product feed for specific part numbers, accompanied by direct contact details like WhatsApp (+86 15951219765) and email (info@wheat-auto.com), indicating a strong reliance on an ‌inquiry-based, direct sales model‌. The company emphasizes principles of ‌“quality first, reputation first”‌ and positions itself as a high-tech electronics company focused on building long-term partnerships and managing global supply chain logistics to connect international manufacturers with worldwide buyers seeking specific industrial parts like the SIEMENS 3RV2021-4CA15-Z X95 MPCB. Therefore, Changzhou Wheat Automation Technology Co., Ltd. positions itself as a ‌global sourcing partner and commercial bridge‌, specializing in international trade and the logistics of distributing specialized industrial components.

‌7. Use Scenarios  ‌

• ‌Compact Motor Starter Panels:‌ Used as the primary protection and control device in compact starter enclosures for individual ‌SIEMENS MOTORs‌ driving pumps, fans, small compressors, and conveyor systems.

• ‌Machine and OEM Equipment:‌ Integrated into the electrical control cabinets of machine tools, packaging equipment, and other OEM machinery to provide main power switching, overload, and short-circuit protection for the integrated ‌SIEMENS MOTOR‌.

• ‌Distributed Motor Control Applications:‌ Ideal for facilities with motors spread across different locations, as it provides a self-contained, compact unit for protection and isolation at each ‌SIEMENS MOTOR‌ point, simplifying installation and maintenance.

• ‌HVAC and Building Services:‌ Applied in Heating, Ventilation, and Air Conditioning (HVAC) systems and other building equipment to protect and manually control fan and pump ‌SIEMENS MOTORs‌.