INNOVEX INC 402B-0B-39 Cummins Auto Transfer Switch Pwrsply Inc. Cummins/innovex 402B-08-39 50/60HZ 480V PH1 3P

( Brand: Innovex Inc ), ( Manufacturer Part Number: 402B-0B-39 ), ( Part Type: Switch 480v Transfer ), ( Actual Rated Input Voltage: 330 Vac ), ( Inverter/vector Duty Rating: Not Inverter/vector Duty Rated ), ( Special Motor Construction: Linear Motor ), ( Base Rpm: 440/480 ), ( Current Type: Ac ), ( Service Factor: 1.00 ), ( Starting/locked Rotor Torque: 0.702b ), ( Iec Frame Size: 64 ), ( Nema Design Letter: Design B ), ( Rated Load: Hp ), ( Ac Frequency Rating: 50/60 Hz ), ( Enclosure Type: Open ), ( Shaft Type: Straight ), ( Ac Motor Type: Synchronous ), ( Shaft Diameter: 0.702b In ), ( Mounting Type: Base-mounted ), ( Dc Stator/winding Type: Permanent Magnet ), ( Reversible/non-reversible: Reversible ), ( Protection Against Liquids: Not Protected ), ( Ip Rating: Ip00 ), ( Nominal Rated Input Voltage: 330 Vac, 440 V ), ( Ac Phase: Single Phase )

Review INNOVEX INC Inc. Cummins/innovex Auto Transfer Switch 50/60hz 480v Ph1 Pwrsply 3p

The **Innovex 402B-0B-39 (Cummins) / 402B-08-39 Automatic Transfer Switch (ATS)** is a high-performance, industrial-grade power management solution engineered to deliver seamless and reliable backup power transitions for critical applications. Designed for demanding environments, this **50/60Hz, 480V, single-phase power supply-compatible** transfer switch integrates advanced **Cummins-branded** reliability with Innovex s precision engineering, ensuring uninterrupted operation for essential systems such as data centers, medical facilities, manufacturing plants, and emergency power backups. The **402B series** stands out with its **compact yet robust construction**, featuring a **3-phase, 4-wire (3P) configuration** that supports both **standby and parallel operation** with generators, making it ideal for applications requiring high efficiency and redundancy. Its **automatic transfer switch mechanism** eliminates manual intervention by instantly detecting power failures and seamlessly switching to the generator or alternate power source within milliseconds, minimizing downtime and protecting sensitive equipment from voltage spikes or surges. Built with **high-quality materials**, including **NEMA 1 or NEMA 3R enclosures** (depending on model variant), the switch is engineered to withstand harsh industrial conditions, including temperature fluctuations, humidity, and dust, ensuring long-term durability. The **402B-0B-39 (Cummins-specific)** and **402B-08-39 (standard)** variants are optimized for compatibility with **Cummins diesel generators** and other prime power sources, respectively, offering flexible integration for both dedicated and parallel generator setups. Featuring **digital control and monitoring capabilities**, this transfer switch provides real-time diagnostics, fault detection, and programmable settings via its **user-friendly interface**, allowing operators to customize transfer logic, test cycles, and maintenance alerts for optimal performance. Whether deployed in a **mission-critical facility** or a **remote industrial site**, the Innovex 402B series delivers **unmatched reliability, efficiency, and ease of installation**, making it a cornerstone of modern power protection strategies.

### **Pros and Cons of buying a Innovex 402B-0B-39 (Cummins) and Innovex Auto Transfer Switch (402B-08-39)**

#### **Overview of the Products**

The **Innovex 402B-0B-39** is a **Cummins-powered generator** designed for backup power, typically used in commercial, industrial, or critical infrastructure applications. The **Innovex 402B-08-39** is an **auto-transfer switch (ATS)** that seamlessly switches power between the generator and the utility grid to ensure uninterrupted operation.

These units are often sold together as a **pre-packaged generator set with automatic transfer switching**, making them ideal for facilities requiring reliable backup power.

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### **Pros**

1. **Reliable Power Source**

- Cummins engines are known for their **durability, efficiency, and long lifespan**, making them a trusted choice for backup power.

- The **402B series** is designed for **continuous operation**, suitable for extended runtime during outages.

2. **Automatic Transfer Switching (ATS)**

- The **402B-08-39 ATS** ensures **instantaneous transfer** between utility power and generator power without manual intervention.

- Prevents **power surges, voltage fluctuations, and equipment damage** by maintaining a stable power supply.

3. **High Power Output (480V, 3-Phase)**

- Capable of powering **large commercial or industrial loads**, including HVAC systems, data centers, manufacturing equipment, and critical infrastructure.

- **50/60Hz compatibility** allows for global or dual-region use.

4. **Low Maintenance Requirements**

- Cummins engines are **engineered for minimal maintenance**, reducing downtime and operational costs.

- Innovex s **pre-wired and tested** setup simplifies installation and reduces on-site errors.

5. **Compliance with Industry Standards**

- Designed to meet **NEMA, UL, and other safety certifications**, ensuring reliability in critical applications.

- Suitable for **commercial, healthcare, and industrial** environments where power reliability is non-negotiable.

6. **Scalability and Flexibility**

- Can be integrated with **battery backup systems, UPS, or other power conditioning equipment** for enhanced reliability.

- Available in **multiple configurations**, allowing for customization based on load requirements.

7. **Reduced Downtime**

- The **automatic transfer** minimizes interruptions, making it ideal for **24/7 operations** (e.g., hospitals, data centers, factories).

8. **Energy Efficiency**

- Cummins engines are optimized for **fuel efficiency**, reducing operational costs compared to smaller or less efficient generators.

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### **Cons**

1. **High Initial Cost**

- **Cummins-powered generators** are **premium-priced**, making them a significant upfront investment.

- The **ATS and pre-wired components** add to the total cost, which may be prohibitive for small businesses or budget-conscious buyers.

2. **Complex Installation and Setup**

- Requires **professional electrical and mechanical expertise** for proper installation, especially in **3-phase, 480V systems**.

- May need **dedicated fuel storage, exhaust ventilation, and cooling systems**, increasing installation complexity.

3. **Fuel Dependency**

- Relies on **diesel fuel**, which is subject to **price fluctuations and supply chain risks**.

- Requires **regular fuel monitoring and storage management** to prevent shortages during extended outages.

4. **Maintenance Costs Over Time**

- While Cummins engines are durable, **regular servicing (oil changes, filter replacements, engine checks)** is necessary to maintain performance.

- **Parts and labor costs** can add up, especially if the unit is used frequently.

5. **Space and Logistical Requirements**

- **Large footprint** due to the **generator size and exhaust system**, requiring dedicated outdoor or enclosed space.

- May need **soundproofing** if installed near sensitive areas, adding to installation costs.

6. **Potential for Overkill in Smaller Applications**

- If the load requirements are **smaller than 480V, 3-phase**, a **less powerful generator** (e.g., single-phase, 240V) might suffice, making this unit **overkill and inefficient** for minimal needs.

7. **Dependence on Utility Grid for Normal Operation**

- The generator is **only used during outages**; otherwise, it remains idle, which may not justify the cost for businesses with **rare or short power interruptions**.

8. **Noise and Environmental Considerations**

- **Diesel generators produce significant noise**, which may require **sound attenuation measures** if installed near residential or noise-sensitive areas.

- **Exhaust emissions** must comply with local regulations, potentially requiring **after-treatment systems** (e.g., particulate filters).

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### **Conclusion**

The **Innovex 402B-0B-39 (Cummins) with the 402B-08-39 ATS** is a **high-end, reliable backup power solution** best suited for **commercial, industrial, or critical infrastructure applications** where **uninterrupted 3-phase, 480V power is essential**.

- Require **high-capacity, continuous backup power**.

- Cannot afford **downtime** (e.g., hospitals, data centers, manufacturing plants).

- Have **existing infrastructure** (e.g., fuel storage, electrical systems) that supports this setup.

- **Small businesses or homeowners** with lower power needs.

- **Budget-sensitive buyers** who cannot justify the high upfront cost.

- **Applications with infrequent outages** where a smaller generator would suffice.

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### **Recommendation**

You operate a **large commercial, industrial, or critical facility** where **480V, 3-phase power is necessary**.

You prioritize **reliability, longevity, and minimal downtime**.

You have **existing infrastructure** (fuel storage, electrical setup) to support a **high-capacity generator**.

You can **afford the initial investment** and **maintenance costs** over time.

Your power needs are **smaller than 480V, 3-phase** (e.g., single-phase, 240V loads).

You experience **rare or short power outages** (a smaller generator or battery backup may suffice).

Your budget is **limited**, and you can opt for a **less expensive brand** (e.g., Kohler, Generac) with similar capacity.

You require **portability** (this is a **stationary unit**).

For **high-reliability, large-scale backup power**, this **Innovex-Cummins setup is an excellent choice**. However, **careful cost-benefit analysis** is essential to ensure it aligns with your **power requirements, budget, and operational needs**. Consulting with a **power systems specialist** before purchase is strongly recommended.

Details:

Still functional. Buy now for $1390 OBO. Enclosure not Included. Contractor and base plate.

Message me with any offer.

part #: 402b0b39 prices

• $989.99-$1390.00

specifications oelemot:

• brand: Innovex Inc
• mpn: 402b-0b-39
• part type: Switch 480v Transfer
• actual rated input voltage: 330 Vac
• inverter/vector duty rating: Not Inverter/vector Duty Rated
• special motor construction: Linear Motor
• base rpm: 440/480
• current type: Ac
• service factor: 1.00
• starting/locked rotor torque: 0.702b
• iec frame size: 64
• nema design letter: Design B
• rated load: Hp
• ac frequency rating: 50/60 Hz
• enclosure type: Open
• shaft type: Straight
• ac motor type: Synchronous
• shaft diameter: 0.702b In
• mounting type: Base-mounted
• dc stator/winding type: Permanent Magnet
• reversible/non-reversible: Reversible
• protection against liquids: Not Protected
• ip rating: Ip00
• nominal rated input voltage: 330 Vac, 440 V
• ac phase: Single Phase

shipping oelemot:

• transit: 5-12 Days
• class: Standard
• carrier: UPS
• service: UPS Ground
• cost: $91.46
• type: Calculated

offer oelemot:

• quantity: 1
• sold: 0
• availability: In Stock
• started: June 11, 2026
• options: Ship-to-home

payments oelemot:

• other
• credit card: Mastercard
• wallet: Google-pay

general oelemot:

• condition: Used
• Industrial Automation Motion Controls > Electric Motors > General Purpose Motors

returns oelemot:

• policy: No Returns

seller oelemot:

• # reviews: 30
• rating: 100.0%
• city: Culver, Indiana