601-LITTLEFUSE LITTELFUSE Nsb Relays Voltage Monitor

Review LITTELFUSE Nsb Relays Voltage Monitor 480v 3ph

The Littelfuse 601 NSB Relay Voltage Monitor is a versatile and reliable protection solution designed for three-phase, 480V electrical systems. This device offers an effective way to monitor and protect your electrical equipment from potential voltage surges or drops.

The heart of this voltage monitor is a contactless solid-state relay, which ensures long-lasting performance and high reliability. The relay is rated for a maximum voltage of 480V and a current of 50A, making it suitable for most industrial applications. The monitor also features a LED indicator that illuminates when the voltage falls below or rises above the preset limits, allowing for easy visual identification of voltage anomalies.

One of the key advantages of the Littelfuse 601 NSB Relay Voltage Monitor is its ability to provide adjustable voltage trip settings. This feature allows you to customize the monitoring threshold to suit the specific requirements of your electrical system. The adjustable settings range from 85% to 110% of the nominal voltage, providing you with the flexibility to fine-tune the monitoring to your needs.

The Littelfuse 601 NSB Relay Voltage Monitor is also equipped with a variety of mounting options, including DIN rail, panel mount, and surface mount, making it a versatile solution for various installation scenarios. Furthermore, it comes with a robust NEMA 1 enclosure that provides protection against dust, moisture, and other harsh environmental conditions.

The Littelfuse 601 NSB Relay Voltage Monitor is an excellent choice for industrial applications that require monitoring and protection of three-phase, 480V electrical systems. Its adjustable voltage trip settings, contactless solid-state relay, and robust NEMA 1 enclosure ensure reliable and long-lasting performance. With its easy-to-use LED indicator, this voltage monitor offers a simple yet effective way to protect your electrical equipment from potentially damaging voltage surges and drops.

Pros and Cons of Buying Littelfuse 601 NSB Relays Voltage Monitor (480V 3-phase)

The Littelfuse 601 NSB Relays Voltage Monitor is a 480V, 3-phase device designed to protect electrical systems by monitoring voltage levels and triggering protective relays when necessary. Here are some potential advantages and disadvantages of purchasing this relay:

1. Enhanced safety: This voltage monitor is designed to prevent overvoltage situations that could potentially damage equipment or pose safety hazards.

2. Versatile application: It can be used in various industries, including industrial, commercial, and institutional facilities.

3. Reliable performance: Littelfuse is a well-known manufacturer in the electrical industry, assuring customers of their products' reliability and durability.

4. Easy installation: The relay comes pre-wired with standard terminals, making installation a straightforward process.

5. Improved system efficiency: By monitoring voltage levels, this relay can help users optimize their electrical systems, reducing energy waste and potential costs.

1. Higher cost: Compared to simpler electrical components, voltage monitors and protective relays can be more expensive.

2. Complexity: These devices might require additional knowledge and expertise to install and maintain, which could add to the overall cost.

3. Limited compatibility: Ensure that the voltage monitor is compatible with your specific electrical system before making a purchase.

4. Limited customization: Depending on your application, you might need a more customized solution, which this relay may not provide.

In conclusion, the Littelfuse 601 NSB Relays Voltage Monitor (480V 3-phase) is an excellent investment for those seeking enhanced safety, reliable performance, and increased system efficiency in their electrical systems. However, its higher cost and potential complexity might deter some users. Before making a decision, carefully consider your specific application and requirements. If the advantages outweigh the disadvantages, this voltage monitor could be an invaluable addition to your electrical system.

Recommendation: If you're in the market for a reliable voltage monitor and protective relay for a 480V 3-phase electrical system, the Littelfuse 601 NSB Relay is an excellent choice. Its safety features, versatility, and potential energy savings make it a worthwhile investment for various industries. However, ensure you have the necessary expertise for installation and maintenance, and confirm compatibility with your specific electrical system.

Details:

Best offer accepted?: yes, sales phone number: number x product condition: nsb. Surplus product, in un-used condition, may have minor wear on packaging. Product height : 5.00 in.

Items do not carry a manufacturers warranty. Used product, no damage, may have cosmetic defects, be missing original packaging. Damaged product, not fit for use or installation, sold parts. Oem ,nsb, NB, Ned, Andre.

Product notes. Condition: unused surplus - in original box product/box may have shelf wear this product does not carry manufacturers warranty. Refurbished product, fully functional and repaired to oem or better standards. These items are sold as is and purchased at buyers risk.

Oem: from the original equipment manufacturer or in-house warranty. We buy and sell products in the following conditions. Surplus product, in un-used condition, fully functional with minor cosmetic defects. Product length : 7.00 in.

As the product would be bought and sold in standard supply chain. Surplus product, in un-used condition, missing the original packaging. Ned: un-used surplus with minor defects. Product width : 5.00 in.

specifications genpurrelays:

• brand: Littelfuse
• mpn: 601-littlefuse
• type: Relays
• weight: 19.20

seller genpurrelays:

• city: buffalo, new york
• # reviews: 10749
• rating: 99.8%

offer genpurrelays:

• sold #: 18
• in stock #: 1
• best offers: true
• availability: in stock
• price: $299.00
• item condition: New – Open box
• options: ship-to-home
• started: january 5, 2026

general genpurrelays:

• category: Business & Industrial > Electrical Equipment Supplies > General Purpose Relays

payments genpurrelays:

• other
• wallet: google-pay
• credit card: discover

shipping genpurrelays:

• class: expedited
• service: usps priority mail
• carrier: usps
• transit: 4-8 days
• type: calculated

returns genpurrelays:

• time: 30 days
• paid by: seller
• policy: returns accepted
• method: money back