RELIANCE ELECTRIC MOTORS ULC3612ATZ Motor Frame Arm 250HP 500V 1750/2000

( Brand: Reliance Electric Motors ), ( Manufacturer Part Number: ULC3612ATZ ), ( Part Type: Motor Frame Arm ), ( Rated Load: Hp ), ( Current Type: Dc ), ( Enclosure Type: Dpbv ), ( Base Rpm: 1750 ), ( Nema Frame Suffix: Atz ), ( Unit Quantity: One ), ( Country Of Origin: United States )

Review RELIANCE ELECTRIC MOTORS 250hp Dc Motor Frame 500v Arm 1750/2000

The **Reliance Electric UL-C3612ATZ 250 Horsepower Motor** is a robust, high-performance electric motor engineered for demanding industrial applications where reliability, efficiency, and durability are paramount. Built to NEMA Premium standards, this **Frame 500** motor delivers exceptional performance in environments where consistent power output and long-term operational integrity are critical. With a **250 horsepower** rating, it is well-suited for heavy-duty machinery such as conveyors, pumps, compressors, and industrial fans, where sustained torque and high-speed operation are required. The motor features a **1750 RPM (60 Hz) or 2000 RPM (50 Hz)** synchronous speed, providing versatility for global applications while maintaining optimal efficiency across varying electrical frequencies.

Designed with **Class F insulation**, this motor ensures extended operational life even under continuous heavy loads, offering superior thermal resistance and protection against premature failure. The **UL-C3612ATZ** designation indicates its compliance with **Underwriters Laboratories (UL) standards**, including **Class B insulation (105 C rise)**, **NEMA Design B torque characteristics**, and **IP54 enclosure protection**, making it ideal for both indoor and outdoor installations where dust, water splashes, and general environmental contaminants are present. The **500-volt rated voltage** allows for efficient power transmission in medium-voltage industrial settings, reducing energy losses and enhancing overall system performance.

The motor s **squirrel-cage induction design** ensures smooth, vibration-free operation while minimizing maintenance requirements, thanks to its robust construction and high-quality materials. Its **foot-mounted configuration** provides stable installation on most industrial platforms, and the **standard NEMA flange** ensures compatibility with a wide range of gearboxes, couplings, and drive systems. Additionally, the **premium efficiency rating** of this motor translates to significant energy savings over its operational lifespan, reducing operational costs while meeting or exceeding modern industrial sustainability standards.

Whether deployed in manufacturing plants, mining operations, or large-scale processing facilities, the **Reliance Electric UL-C3612ATZ 250HP motor** exemplifies reliability, precision engineering, and long-term cost-effectiveness. Its combination of **high torque output, robust protection features, and energy-efficient performance** makes it an indispensable component for industries where downtime is unacceptable, and performance consistency is non-negotiable. Built to withstand the rigors of continuous operation, this motor is a testament to Reliance Electric s commitment to delivering industrial-grade solutions that drive productivity and operational excellence.

### **Pros and Cons of buying a Reliance Electric UL-C3612ATZ 250 HP Motor (Frame 500V, ARM, 1750/2000 RPM)**

1. **High Power and Performance** A 250 HP motor delivers substantial torque and power, making it suitable for heavy-duty industrial applications such as pumps, compressors, conveyors, and large machinery. Its ability to operate at both 1750 RPM and 2000 RPM provides flexibility for different load requirements.

2. **Reliance Electric Brand Reputation** Reliance Electric is a well-established manufacturer known for producing durable, high-quality industrial motors. Their products are often favored in industrial settings for reliability and longevity.

3. **ARM (Adjustable RPM) Capability** The motor s ability to operate at two different speeds (1750 RPM and 2000 RPM) allows for better control over load matching and energy efficiency, depending on the application. This can reduce wear and tear on connected equipment.

4. **500V Voltage Rating** A 500V motor is suitable for medium to large industrial applications where higher voltage is required to handle significant power demands without excessive current draw.

5. **Frame Size 500** This frame size is standard for large motors, ensuring compatibility with a wide range of industrial gearboxes, couplings, and mounting systems. It also indicates that the motor is built for robust, heavy-duty use.

6. **Potential Energy Efficiency** If the motor is relatively new or well-maintained, it may offer better energy efficiency compared to older or poorly maintained motors, leading to cost savings over time.

7. **Resale or Reuse Potential** High-quality industrial motors like this one can sometimes be resold or repurposed in other applications, adding value if the original use case changes.

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1. **High Initial Cost** A 250 HP motor is a significant investment. The upfront cost can be prohibitive for small businesses or startups, especially if the motor is new and not used. Prices for such motors can range from $10,000 to $30,000 or more, depending on condition and brand.

2. **Maintenance Requirements** Large motors require regular maintenance, including bearing lubrication, winding inspections, and cooling system checks. Neglecting maintenance can lead to premature failure, costly downtime, and reduced efficiency.

3. **Energy Consumption** A 250 HP motor consumes a large amount of electricity, which can result in high operational costs, particularly in facilities with high energy rates. If the motor is not fully utilized, this inefficiency can be costly.

4. **Space and Installation Constraints** The motor s size (Frame 500) requires adequate space for installation, ventilation, and maintenance. Improper installation or lack of space can lead to overheating or operational issues.

5. **Potential for Obsolescence** Older models, even from reputable brands, may lack modern efficiency features (e.g., variable frequency drive compatibility, energy-saving designs). If the application requires advanced controls, a newer motor might be more suitable.

6. **Risk of Damage or Wear** If the motor is used or has a history of heavy use, it may have hidden issues such as worn bearings, damaged windings, or misalignment. A thorough inspection (or testing) is essential before purchase to avoid hidden costs.

7. **Depreciation** Industrial motors, like all machinery, depreciate over time. If the motor is purchased for a short-term project or rental use, the depreciation may not justify the investment.

8. **Compatibility Issues** Ensuring the motor matches the voltage, phase, frequency, and mechanical requirements of the application is critical. Mismatches can lead to inefficiency, damage, or failure. Consultation with an electrical engineer may be necessary.

9. **Transportation and Handling Costs** Large motors are heavy and bulky, requiring specialized transportation and handling. Shipping costs can add significantly to the total expense.

10. **Warranty Limitations** Used motors may come with limited or no warranties, leaving the buyer responsible for all repair costs. Even new motors may have warranties that exclude certain types of damage (e.g., improper installation).

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The **Reliance Electric UL-C3612ATZ 250 HP motor (Frame 500V, ARM, 1750/2000 RPM)** is a powerful, durable, and reliable choice for heavy-duty industrial applications where high torque and adjustable speed are required. Its strengths lie in its performance, brand reputation, and versatility, making it ideal for large-scale operations such as manufacturing, mining, or energy production. However, the high cost, maintenance demands, and energy consumption must be carefully considered. For businesses with the budget and infrastructure to support such a motor, it can be a long-term asset. For smaller operations or those with limited resources, the investment may not be justified unless the motor is acquired at a significantly reduced price (e.g., used or surplus).

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- Confirm that a 250 HP motor is necessary for your application. Smaller motors may suffice for lighter loads, reducing costs and energy use.

- Verify that the adjustable RPM (ARM) feature aligns with your operational requirements. If fixed-speed operation is acceptable, a simpler motor may be more cost-effective.

- If budget is a constraint, explore **certified used or surplus motors** from reputable suppliers. Ensure they come with inspection reports, warranties, or performance guarantees.

- For new motors, compare prices from multiple suppliers (e.g., Reliance Electric, ABB, Siemens, or local distributors) to ensure you re getting the best deal.

- Calculate not just the purchase price but also installation, maintenance, energy costs, and potential downtime. A motor with higher upfront costs may save money in the long run if it s more efficient or durable.

- Consider energy-efficient alternatives (e.g., variable frequency drive-compatible motors) if your application allows for variable speed control.

- If purchasing a used motor, arrange for a **professional inspection** to check for wear, damage, or electrical issues. Test the motor under load if possible.

- Ensure the motor s **nameplate specifications** (voltage, phase, frequency, RPM) match your application s requirements.

- Develop a **regular maintenance schedule** to extend the motor s lifespan. This includes lubrication, cooling system checks, and vibration analysis.

- Train personnel on proper operation and troubleshooting to minimize downtime.

- If the motor is only needed temporarily, consider **renting or leasing** instead of purchasing.

- Explore **motor repair or refurbishment** options if the motor is damaged but repairable, as this may be cheaper than buying new.

- Purchase from **authorized dealers or reputable suppliers** to ensure authenticity and support.

- If buying new, verify the warranty coverage and what it excludes (e.g., damage from improper use).

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The **Reliance Electric UL-C3612ATZ 250 HP motor** is a **strong investment for large-scale industrial applications** where reliability and power are critical. However, it is **not a suitable choice for small businesses, short-term projects, or applications with lower power demands** due to its cost and complexity. **Prioritize compatibility, budget, and long-term maintenance** before making a purchase. If the motor aligns with your needs and you can secure it at a reasonable price (especially used), it will likely serve as a **valuable and durable asset** for decades. Otherwise, consider alternatives like smaller motors, energy-efficient models, or leasing options.

Details:

Blower included. Roller bearing drive end belt application. Straight shunt. Made by Reliance Electric Motors in the USA, this motor is a reliable and efficient option for industrial automation motion control systems requiring 250HP DC.

Teach provision. With a rated load of 250 horsepower, this motor operates at base RPM 1750 and is suitable for various automation motion control systems. The ULC3612ATZ frame size and DPBV enclosure type ensure durability protection against environmental factors.

part #: ulc3612atz prices

• $199.95-$647.70

specifications oelemot:

• brand: Reliance Electric Motors
• mpn: Ulc3612atz
• part type: Motor Frame Arm
• rated load: Hp
• current type: Dc
• enclosure type: Dpbv
• base rpm: 1750
• nema frame suffix: Atz
• unit quantity: One
• country of origin: United States

offer oelemot:

• best offers: True
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: May 27, 2026
• quantity: 1

payments oelemot:

• wallet: Paypal
• other
• credit card: Mastercard

shipping oelemot:

• transit: 3-8 Days
• type: Fixed
• class: Economy
• service: Economy
• cost: $0.00

returns oelemot:

• policy: No Returns

seller oelemot:

• city: Saint Louis, Missouri
• rating: 100.0%
• # reviews: 3805

general oelemot:

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

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