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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RB2956-2TG2 |
| Alternative Part Number | 3RB29562TG2 |
| Manufacturer | Siemens |
| Adjustable Response Current | 20 … 200 A |
| Service Power for Three-Phase Motors | Rated value 90 … 11 kW |
| Type of Protection | PTB 05 ATEX 3022 Ex II (2) GD |
| Mounting Type | Direct mounting / stand-alone installation |
| Electrical Connection | Design for main current circuit: straight-through transformers |
| Protection Class IP | IP20 |
| Ambient Conditions | Suitable for use in environments where the temperature ranges from -25 to +60 °C |
| Weight | Approximately 235 g |
| Galvanic Isolation | Safe isolation at Ui <= 300 V |
| Switching Capacity | AC-15: 6A/24V; 6A/125V; 3A/250V, DC-13: 2 A / 24 V; 0.55 A / 60 V; 0.3 A / 125 V; 0.2 A / 250 V |
| Certificates/ Approvals | General Product Approval for use in hazardous locations |
The Siemens 3RB2956-2TG2 is a sophisticated current transformer designed to enhance the protection and management of three-phase motors and other electrical equipment. This component is part of the 3RB family, known for its reliability and precision in monitoring electrical currents.
Crafted for versatility, the 3RB2956-2TG2 can be directly mounted or installed as a stand-alone unit, providing flexibility for various industrial settings. It features an adjustable response current range from 20 to 200 A, catering to a wide spectrum of applications and motor sizes. The transformer is suitable for servomotors with a rated value between 90 and 110 kW, ensuring that it can handle significant power requirements.
The unit boasts a straightforward electrical connection for the main current circuit through transformers, ensuring ease of integration into existing systems. With an IP20 protection class, it is designed to operate safely in industrial environments, protecting against solid objects larger than 12mm but not against water.
The 3RB2956-2TG2 is compliant with the PTB 05 ATEX 3022 Ex II (2) GD standard, indicating its suitability for use in potentially explosive atmospheres, which is critical for maintaining safety in hazardous areas.
This current transformer is an essential component for industrial automation, providing reliable protection against overloads and ensuring the longevity and efficiency of electrical equipment. Its robust design and compliance with international standards make it a valuable addition to any industrial electrical protection system.
Commonly Asked Questions
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Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.
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Read more...Is Marvo a credible parts supplier?
Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.
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Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.
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Frequently Asked Questions
What is the function of this electronic overload relay?
The electronic overload relay is designed to provide reliable protection for motors by monitoring and reacting to overload and phase-failure conditions. It ensures that the connected motor is safeguarded against potential damage due to excessive current draw.
Can this relay be used with high-efficiency motors?
Yes, the relay is suitable for use with high-efficiency motors. It meets the stringent requirements of the AC-3e utilization category, which takes into account the higher switch-on characteristics of efficiency-enhanced motors.
What is the current adjustment range for this relay?
The current adjustment range for the 3RB2956-2TG2 is from 20 to 200 A, allowing for flexibility in protecting a wide range of motor sizes.
How can I reset the relay after a trip event?
The relay can be reset manually by pressing the Test/Reset button or automatically if it is set to the auto-reset mode. Before resetting, ensure that the cause of the trip has been identified and rectified.
Is there a specific orientation required for mounting this relay?
The relay can be mounted in any orientation, providing flexibility in installation. However, it is important to follow the manufacturer's guidelines for proper mounting and securing of the device.
What type of protection does the relay offer for motor lines?
The relay offers protection against overload and phase failure for motor lines. It is designed to detect imbalances and prevent damage to the motor by disconnecting the power in the event of a fault.
Does the relay have a short-circuit protection feature?
The relay itself does not provide short-circuit protection. It should be used in conjunction with appropriate circuit breakers or fuses to ensure complete protection of the electrical system.
What are the environmental operating conditions for this relay?
The relay is designed to operate within an ambient temperature range of -25 to +60 degrees Celsius, ensuring reliable performance in a variety of industrial environments.
How can I integrate this relay into my existing motor control circuit?
The relay can be easily integrated into your motor control circuit using its screw-type terminals for secure connections. It is compatible with a range of contactors and can be connected to current measuring modules for comprehensive motor protection.
What should I do if the relay trips frequently?
Frequent tripping may indicate an underlying issue with the motor or the electrical circuit. It is advisable to inspect the motor for potential overloads, phase imbalances, or wiring issues and to ensure the relay is set correctly according to the motor's specifications.
Part conditions explained
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Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.
Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.
