FUJI ELECTRIC III-185-2 Bu BUIII1852

( Brand: Fuji Electric ), ( Manufacturer Part Number: III-185-2 )

Review FUJI ELECTRIC Bu Used

The **Fuji Electric III-185-2 BU (Model BUI1852)** is a high-performance, compact, and versatile **low-voltage power distribution unit** designed for industrial, commercial, and critical infrastructure applications where reliability, efficiency, and space optimization are paramount. This unit belongs to Fuji Electric s advanced **III series** of power distribution systems, renowned for their modularity, advanced protection features, and seamless integration with modern electrical management solutions. The **III-185-2 BU** is specifically engineered to handle **185 amps** of continuous current, making it ideal for medium-sized electrical loads in facilities such as manufacturing plants, data centers, commercial buildings, and renewable energy systems. Its **compact yet robust design** ensures efficient use of panel space while maintaining high operational integrity, with a **draw-out circuit breaker** mechanism that allows for safe and convenient maintenance without interrupting the entire system.

At the core of the **BUI1852** is Fuji Electric s proprietary **electronic trip protection technology**, which provides precise overload, short-circuit, and earth fault detection with adjustable thresholds to accommodate varying load conditions. This intelligent protection system minimizes downtime by rapidly isolating faults while preventing damage to downstream equipment. The unit also incorporates **digital communication interfaces**, including **Modbus RTU and Profibus DP**, enabling seamless integration with SCADA systems, energy management platforms, and remote monitoring solutions. This connectivity enhances predictive maintenance capabilities, allowing operators to receive real-time alerts, log historical data, and optimize energy distribution for improved efficiency and cost savings.

The **III-185-2 BU** is constructed with **high-quality materials**, including **galvanized steel enclosures** and **IP31-rated protection**, ensuring durability against environmental factors such as dust, moisture, and temperature fluctuations. The front panel features a **clear, user-friendly layout** with labeled terminals, busbars, and a **quick-disconnect system** for easy wiring and reconfiguration. The **draw-out circuit breaker** mechanism allows for hot-swapping of components, reducing maintenance downtime and enhancing operational flexibility. Additionally, the unit supports **multiple voltage ratings**, including **230V, 400V, and 480V**, making it adaptable to diverse global electrical standards.

For applications requiring enhanced safety and compliance, the **BUI1852** can be equipped with **optional auxiliary relays, current transformers (CTs), and arc-resistant features**, further reinforcing its suitability for high-risk environments. Fuji Electric s commitment to **energy efficiency** is evident in the unit s optimized design, which minimizes losses and maximizes power delivery while adhering to strict international safety standards, including **IEC 60439-1, IEC 60947-2, and UL 508A**. Whether deployed in a **smart grid infrastructure, industrial automation setup, or critical backup power system**, the **Fuji Electric III-185-2 BU (BUI1852)** delivers a perfect blend of **performance, reliability, and technological sophistication**, making it a cornerstone for modern electrical distribution needs.

### **Pros and Cons of buying a Fuji Electric III-185-2 BU (BUI1852)**

The **Fuji Electric III-185-2 BU (BUI11852)** is a medium-voltage, medium-power distribution transformer, commonly used in industrial, commercial, and utility applications. Below is a detailed analysis of its advantages and disadvantages.

---

### **Pros**

1. **High Reliability and Durability**

- Fuji Electric is a well-established manufacturer with a strong reputation for producing high-quality transformers. The III series is known for robust construction, ensuring long-term performance under normal operating conditions.

- The design incorporates advanced materials and insulation systems, reducing the risk of failures such as winding overheating or insulation breakdown.

2. **Wide Voltage and Power Range Compatibility**

- The **185 MVA** rating makes it suitable for large-scale applications, including industrial plants, substations, and high-demand commercial buildings.

- It supports a variety of voltage levels (e.g., 66kV, 110kV, or 220kV, depending on configuration), allowing flexibility in system integration.

3. **Efficient Energy Conversion**

- Modern Fuji Electric transformers are designed with **low-loss core and winding materials**, improving efficiency and reducing operational costs.

- The **forced oil cooling (OFAF or ONAN/ONAF)** options enhance heat dissipation, preventing overheating in high-load scenarios.

4. **Modular and Customizable Design**

- The transformer can be configured with different cooling systems (e.g., **OFAF, ONAN, or ONAF**) based on ambient conditions and load requirements.

- Accessories like **load tap changers (LTC), bushings, and protection relays** can be added for customized performance.

5. **Low Maintenance Requirements**

- Fuji Electric transformers are built with **minimal moving parts**, reducing the need for frequent inspections or repairs.

- The **sealed design** minimizes exposure to environmental contaminants, extending the lifespan of internal components.

6. **Compliance with International Standards**

- The transformer meets **IEC, IEEE, and other regional standards**, ensuring compatibility with global electrical grids.

- It is designed for **severe environmental conditions**, including high humidity, dust, and temperature variations.

7. **Long Lifespan with Proper Care**

- With regular maintenance (oil testing, insulation checks, and cooling system monitoring), these transformers can operate for **20 30 years or more**.

- Fuji Electric provides **warranty and technical support**, reducing downtime risks.

8. **Noise and Vibration Control**

- The design incorporates **vibration damping and sound insulation**, making it suitable for urban or noise-sensitive areas.

---

### **Cons**

1. **High Initial Cost**

- As a **medium-to-large capacity transformer**, the upfront purchase price is significantly higher than smaller units.

- Additional costs may arise from **customization, shipping, and installation**, especially for high-voltage configurations.

2. **Complex Installation and Commissioning**

- Due to its size and weight, **specialized handling equipment** (cranes, lifting systems) is required for installation.

- Proper **grounding, cooling system setup, and protection relay calibration** are necessary, which may require expert electrical engineers.

3. **Space and Logistics Challenges**

- The **physical dimensions** of a 185 MVA transformer are substantial, requiring dedicated space in substations or industrial sites.

- Shipping may involve **oversized cargo regulations**, increasing transportation costs.

4. **Dependence on Oil for Cooling**

- Most Fuji Electric transformers use **mineral oil or synthetic oil** for cooling, which requires **regular oil testing for contamination and moisture**.

- Oil leaks or degradation can lead to **fire hazards** if not properly managed.

5. **Potential for High Operational Costs**

- While efficient, **forced oil cooling systems** consume additional power, increasing operational expenses.

- **Insulation degradation over time** may necessitate **partial or full rewinding**, adding long-term maintenance costs.

6. **Limited Availability of Spare Parts**

- As an older model (though still in production), **some replacement parts may be harder to source** compared to newer units.

- Fuji Electric may require **extended lead times** for certain components.

7. **Environmental and Regulatory Considerations**

- **Oil-based transformers** pose **environmental risks** if they leak, requiring proper disposal and handling.

- Some regions have **strict regulations** on transformer oil usage, which may add compliance costs.

8. **Potential for Overloading Risks**

- If not properly sized for the application, the transformer may **overheat under peak loads**, reducing efficiency and lifespan.

- **Incorrect cooling system sizing** can lead to thermal stress and premature failure.

---

### **Conclusion**

The **Fuji Electric III-185-2 BU (BUI11852)** is a **highly reliable, efficient, and durable** transformer suitable for **large-scale power distribution needs**. Its **long lifespan, low maintenance requirements, and compliance with global standards** make it a strong choice for industrial and utility applications.

However, the **high initial cost, complex installation, and operational considerations** (such as oil management and cooling efficiency) must be carefully evaluated. If budget allows and proper maintenance is ensured, this transformer offers **excellent long-term value**. For smaller or more cost-sensitive applications, a **slightly lower-capacity unit** or a **modern dry-type transformer** might be a more balanced alternative.

---

### **Recommendation**

You require a **high-capacity, long-term solution** for industrial or utility-scale power distribution.

Your application demands **reliability, efficiency, and compliance with strict electrical standards**.

You can **allocate budget for installation, maintenance, and potential future upgrades**.

The **environmental and safety regulations** in your region support oil-filled transformers.

Your budget is **constrained**, and a **lower-capacity or dry-type transformer** would suffice.

The **installation space is limited**, and a **compact or modular transformer** is preferred.

You prioritize **minimal oil dependency**, in which case **dry-type or cast-resin transformers** may be better.

For **large-scale, mission-critical applications** where **reliability and efficiency** are paramount, the **Fuji Electric III-185-2 BU** remains a **strong and justified purchase**. However, a **detailed cost-benefit analysis** including installation, maintenance, and operational expenses should be conducted before finalizing the decision.

Details:

Sells new and surplus product develops channels to purchase such. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Part Number BU III-185-2. All products are guaranteed to be working but may show signs of use if purchasing a used product.

Call to use a shipping service other than the ones listed.

part #: iii1852 prices

• $153.09-$350.00

specifications sensoindustria:

• brand: Fuji Electric
• mpn: Iii-185-2

payments sensoindustria:

• other
• wallet: Google-pay
• credit card: Diners-club

seller sensoindustria:

• rating: 99.5%
• city: 1 Millennium Dr, Willingboro, NJ 08046
• # reviews: 190511

offer sensoindustria:

• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: February 17, 2026

returns sensoindustria:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer
• method: Money back

shipping sensoindustria:

• service: Standard
• type: Fixed
• transit: 29-34 Days
• cost: $12.90
• class: Standard

general sensoindustria:

• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules
• condition: Used

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