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Specification & Description
| Specification | Description |
|---|---|
| Part Number | ZB12-1 |
| Alternative Part Number | ZB121 |
| Manufacturer | Moeller |
| Current Range | 0.16 - 16 A |
| Tripping Class | 10 A |
| Ambient Temperature | 20 °C (for reference tripping characteristics) |
| Tolerance Range | ± 20 % |
| Mounting Options | Direct mounting to contactor or individual installation with separate mounting accessories |
| Compatibility | Can be used in combination with specific contactors and overload relays for motor protection |
| Application | Overload protection with bimetal relays, phase failure sensitivity, temperature compensation |
| Features | Test function, manual or automatic reset, adjustable current settings |
The Moeller ZB12-1 is a precision-engineered motor-protective relay designed to safeguard AC and DC motors from potential overload conditions. This compact and robust device is an essential component for industrial automation systems, ensuring the longevity and efficiency of motors by monitoring and responding to electrical current levels.
Crafted with meticulous attention to detail, the ZB12-1 features a bimetallic release mechanism that provides reliable and accurate overload protection. The relay is capable of temperature compensation, which allows it to maintain performance across a range of environmental conditions, ensuring consistent operation without the need for frequent adjustments.
The ZB12-1 is versatile and can be directly mounted onto contactors, making it a convenient addition to a variety of electrical assemblies. Its straightforward design allows for easy installation and maintenance, while its manual and automatic reset functions offer flexibility in operation, catering to different system requirements.
With its robust construction and reliable performance, the Moeller ZB12-1 motor-protective relay is a valuable asset for any industrial setting where motor protection is a priority. It is designed to integrate seamlessly into existing systems, providing a layer of protection that helps prevent downtime and extends the service life of motors.
Commonly Asked Questions
Is my order covered by a warranty?
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.
Read more...Have steps been taken to ensure quality control?
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 overload relay?
The Moeller ZB12-1 is designed to provide protection for electric motors from overloads. It uses a bimetallic strip to detect excessive current which can cause overheating and potential damage to the motor.
How can I install this overload relay?
Installation should be carried out by qualified personnel following the specific instructions provided with the device. It involves mounting the relay, connecting motor and power supply lines, and ensuring proper settings according to the application requirements.
Can this relay be used for motors in explosive environments?
Yes, the Moeller ZB12-1 can be used for motors in potentially explosive environments, but it must be installed and operated according to the strict guidelines specified for such applications to ensure safety.
How do I set the correct current range on the relay?
The current range on the Moeller ZB12-1 can be set by adjusting the dial on the relay to match the motor's full load current. This ensures accurate overload protection tailored to the specific motor being used.
What should I do if the relay trips?
If the Moeller ZB12-1 trips, you should first identify and rectify the cause of the overload. Once the issue is resolved and the bimetallic strip has cooled down, the relay can be manually reset.
Is there a way to test the functionality of the relay?
Yes, the Moeller ZB12-1 includes a test function that allows you to simulate an overload condition to ensure the relay is functioning correctly. This should be done as part of regular maintenance checks.
What are the temperature considerations for this relay?
The Moeller ZB12-1 is temperature compensated to ensure reliable operation over a range of ambient temperatures. However, it's important to consider the operating environment as extreme temperatures can affect performance.
Can the relay prevent automatic restarts after a trip?
Yes, the Moeller ZB12-1 can be wired in a way that prevents automatic restarts after a trip, which is particularly important in hazardous environments to ensure safety.
What maintenance is required for this overload relay?
Regular maintenance for the Moeller ZB12-1 includes testing its functionality, checking for any signs of damage or wear, ensuring connections are secure, and verifying that the current settings are still appropriate for the motor.
How does phase loss protection work in this relay?
The Moeller ZB12-1 is equipped with phase loss sensitivity, which allows it to trip in the event of a phase loss to protect the motor from unbalanced voltages that could cause damage.
Part conditions explained
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New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.
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