3RU1126-1KB0

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The Siemens 3RU1126-1KB0 is a robust overload relay designed to offer efficient motor protection. This component is essential for safeguarding motors in industrial settings, ensuring they operate within safe current limits to prevent damage due to overloads. With a current adjustment range of 9 to 12.5 A, it is versatile enough to cater to a variety of motor sizes within its specification.

Crafted for direct mounting, this overload relay is engineered to fit seamlessly with size S0 contactors, providing a compact and reliable solution for motor control circuits. The unit features a manual and automatic reset function, which adds to its operational flexibility, allowing for quick restoration of motor function after a trip event.

The 3RU1126-1KB0 is designed with user safety in mind, boasting finger-safe terminals and an IP20 protection class on the front, ensuring protection against solid objects and a degree of touch safety. Its insulation voltage is rated at 690 V, with a pollution degree of 3, and it can withstand impulse voltages up to 6 kV, highlighting its robustness in challenging industrial environments.

This overload relay is also equipped with one normally closed (NC) and one normally open (NO) auxiliary contact, which can be used for signalling and control purposes, further enhancing its utility in complex motor control schemes.

With a compact footprint of 45 x 96 x 97 mm, the Siemens 3RU1126-1KB0 does not demand excessive space, making it suitable for installations where space is at a premium. Its screw-type terminals provide a secure and reliable connection for both the main and auxiliary circuits, ensuring consistent performance and ease of maintenance.

Overall, the Siemens 3RU1126-1KB0 overload relay is a dependable choice for industrial applications requiring precise motor protection and control. Its combination of safety features, flexible mounting options, and compact design make it a valuable addition to any motor control system.

What is the function of this overload relay?

The overload relay is designed to protect motors from overcurrent by interrupting the electrical supply when an overload condition is detected, typically used in conjunction with a contactor.

Can this overload relay be directly mounted to a contactor?

Yes, it is designed for direct mounting to a compatible contactor, facilitating a compact and efficient setup.

What is the trip class of this overload relay?

This overload relay has a trip class of 10, which means it will trip or activate within 10 seconds under certain overload conditions to provide motor protection.

What are the dimensions of this overload relay?

The dimensions of the overload relay are 45 mm in width, 96 mm in depth, and 97 mm in height, making it suitable for installations where space is a consideration.

What is the range of operating temperatures for this overload relay?

The operating temperature range for this overload relay is from -20°C to +70°C, ensuring reliable performance across a wide range of environmental conditions.

What type of terminals does this overload relay have?

This overload relay is equipped with screw-type terminals for both the main current circuit and the auxiliary and control current circuit.

What is the insulation voltage rating of this overload relay?

The insulation voltage rating of this overload relay is 690 V, with a degree of pollution 3, providing a high level of insulation and safety.

What is the maximum operating altitude for this overload relay?

The maximum operating altitude for this overload relay is 2,000 meters above sea level, which allows for use in various industrial locations.

How many poles does this overload relay have for the main current circuit?

This overload relay has three poles for the main current circuit, which is typical for three-phase motor protection applications.

What is the adjustable pick-up value current range for this overload relay?

The adjustable pick-up value current range for this overload relay is from 9 A to 12.5 A, allowing for precise setting based on the motor's requirements.

  • Motor overload protection in industrial automation systems
  • Preventing excessive current in HVAC systems
  • Safeguarding pumps from overcurrent conditions
  • Protecting conveyor systems from electrical overload
  • Use in control panels for manufacturing equipment
  • Integration into motor control centres for motor management
  • Overload monitoring in packaging machinery
  • Ensuring safe operation of compressors
  • Electrical protection for material handling equipment
  • Overcurrent safety for agricultural machinery motors

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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