3UA5940-0K

Siemens thermal overload relays for electrical protection

Manufacturer: siemens-energy

series introduction

# Introduction to the 3UA5940 - 0K Product Series

## Overview
The 3UA5940 - 0K product series is a cutting - edge offering designed to meet the diverse and demanding requirements of modern electrical protection and control systems. This series represents a culmination of advanced engineering, high - quality manufacturing, and innovative design, providing reliable and efficient solutions for a wide range of industrial and commercial applications.

## Key Features

### 1. Precise Overload Protection
One of the primary functions of the 3UA5940 - 0K series is to offer accurate overload protection for electrical motors and other equipment. It is equipped with highly sensitive sensors that can detect even the slightest increase in current beyond the normal operating range. This early detection allows for timely tripping of the circuit, preventing damage to the connected devices due to overheating and excessive current flow. The adjustable overload settings enable users to customize the protection level according to the specific requirements of their equipment, ensuring optimal performance and longevity.

### 2. Short - Circuit Protection
In addition to overload protection, the 3UA5940 - 0K series provides robust short - circuit protection. It can quickly identify short - circuit conditions, which are characterized by extremely high current spikes. Once a short - circuit is detected, the device rapidly interrupts the circuit, minimizing the risk of fire, equipment damage, and electrical hazards. The fast - acting short - circuit protection mechanism is designed to respond within milliseconds, safeguarding both the electrical system and the surrounding environment.

### 3. Compact Design
The 3UA5940 - 0K series features a compact and space - saving design, making it ideal for installations where space is limited. Its small footprint allows for easy integration into control panels, switchgear, and other electrical enclosures. Despite its compact size, the device does not compromise on performance, offering all the necessary protection and control functions in a single, efficient unit.

### 4. High - Quality Construction
These products are built to last, with a focus on durability and reliability. The housing is made from high - grade materials that can withstand harsh environmental conditions, including dust, moisture, and temperature variations. The internal components are carefully selected and tested to ensure long - term stability and performance. This high - quality construction reduces the need for frequent maintenance and replacement, resulting in lower overall costs for the end - user.

### 5. Easy Installation and Configuration
The 3UA5940 - 0K series is designed for easy installation and configuration. It comes with clear installation instructions and user - friendly interfaces, allowing even non - technical personnel to set up the device quickly and accurately. The adjustable settings can be easily accessed and modified using the built - in controls or through external communication interfaces, providing flexibility and convenience for different applications.

### 6. Compatibility
This product series is highly compatible with a wide range of electrical systems and equipment. It can be used in conjunction with various types of motors, contactors, and other control devices, making it a versatile solution for different industrial processes. The compatibility ensures seamless integration into existing electrical setups, reducing the need for extensive modifications and upgrades.

## Applications

### 1. Industrial Manufacturing
In industrial manufacturing plants, the 3UA5940 - 0K series is used to protect motors in conveyor systems, pumps, compressors, and other machinery. By providing reliable overload and short - circuit protection, it helps to prevent costly downtime and equipment failures, ensuring smooth and efficient production processes.

### 2. Commercial Buildings
In commercial buildings, these devices are employed in HVAC systems, elevators, and lighting control panels. They protect the electrical equipment from overloading and short - circuits, enhancing the safety and reliability of the building's electrical infrastructure.

### 3. Power Generation and Distribution

Partlist

3UA5940-0K