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Thermal Overload Relay

 

Electrical motors often exert too much load on the power systems, it is essential that you have all the right equipment and supplies to protect them from overheating. Here comes the role of our thermal overload relay, which offers the most effective solution for complete motor protection. The temperature-compensated relays work by tripping off the motor in case of an overload. We at Fastron Electronics offer a dedicated product line for commercial and industrial applications. Being one of Australia’s leading manufacturers of power solutions, we offer best in class services and on-time delivery to our customers. We have a wide range of electrical supplies and devices designed to optimise power usage and significantly minimise your average power costs.

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Why Do You Need Thermal Overload Protection?

Most of the manufacturing industries rely on electric motors to operate on a daily basis for various production processes, heat is an unavoidable condition that can only be tackled with our high-end thermal overload relay. The overload relays are used to provide extensive protection for both 1 and 3 phase motors commonly found in appliances including fans, compressors, conveyors and so on. The device monitors the motor’s operating current and switches the contactor off whenever there is an overload. This way you can protect your motor against heavy damage in case of an emergency.

Key Benefits

  • Unparallel protection to motors
  • Easy to optimise with temperature compensation
  • Highly customised for specific applications
  • Adjustable current settings
  • Both automatic and manual reset available

 

For over 40 years, we at Fastron Electronics have been providing value for money electrical supplies and devices for commercial industry and manufacturing businesses. You can find thermal overload relays specifically designed for the current-dependent protection of applications. Our relays feature a switch-off time that prevents overloading and phase failures.

How Does Thermal Overload Relay Work?

The overload relays can be wired in series to make the current flow through the overload relay. Once the current reaches a certain limit, the relays automatically activate a mechanism to interrupt the flow of the current flow. Our in-house engineered thermal overload relays effectively measure the heating profile of your motor. They are designed to cut off power when the motor starts to draw too much current for an extended period of time. The relay simply opens up when it detects an increase in motor temperature and excessive current flowing through the circuit.

When you use our overload relays, you can ensure harmless temporary overloads that do not disrupt the circuits no matter what. Once the overload is removed, you can reseat the overlays. Our protective devices are built with the latest innovative technologies, they are capable of cutting off power from the motor if too much current is being drawn over a long period of time.

Keep your motor protected at all times with our safe overload relays.


FAQ's


1. What is a thermal overload relay and how does it work?
A thermal overload relay is a protective device that monitors a motor’s operating current. When the current exceeds a safe limit for an extended period, the relay trips and disconnects the motor, preventing overheating and damage. It uses a temperature-compensated mechanism to detect overload conditions and safeguard electrical motors.
2. Where can I buy a reliable thermal overload relay in Australia?
You can find reliable thermal overload relays at Fastron Electronics, a trusted supplier of motor protection solutions in Australia. We offer a wide range of relays for commercial and industrial applications, with prompt delivery and high-quality customer support.
3. What is the difference between a thermal overload relay and a magnetic overload relay?
A thermal overload relay responds to excessive heat caused by prolonged current overload, while a magnetic overload relay reacts instantly to sudden current spikes. Thermal relays are better for gradual overload protection, while magnetic relays are ideal for short-circuit protection.
4. How does thermal overload protection prevent motor damage in electrical systems?
Thermal overload protection prevents motor damage by monitoring current and disconnecting the power when it exceeds safe levels. This protects the motor from overheating, phase failure, and long-term damage, ensuring reliable operation and safety.
5. Can I use a thermal overload relay in both industrial and residential applications?
Yes, thermal overload relays are suitable for both industrial and residential applications. They are commonly used in equipment like fans, conveyors, and compressors to protect motors from damage due to current overload.
6. What are the key benefits of thermal overload protection for motors and equipment?
Thermal overload protection offers several benefits: it prevents motor overheating, provides temperature compensation, allows adjustable current settings, and supports both manual and automatic resets—ensuring reliable performance and motor longevity.
7. What is the typical current and voltage rating for thermal overload relays?
Thermal overload relays are available in various current and voltage ratings, suitable for protecting both single and three-phase motors. Fastron Electronics offers a range of options tailored to specific application requirements.
8. How do I install a thermal overload relay in my electrical system?
Thermal overload relays are typically wired in series with the motor circuit. This setup allows the relay to monitor current flow and trip when it detects an overload, providing effective motor protection.
9. Are thermal overload relays suitable for controlling high-power motors?
Yes, thermal overload relays are suitable for high-power motors. They are widely used in manufacturing and commercial settings to protect heavy-duty motors from overheating and electrical overload.
10. What is the lifespan of a thermal overload relay under normal conditions?
Under normal operating conditions, thermal overload relays offer a long service life. Their durability depends on the application environment and usage, but they are designed for reliable and extended use in various settings.
11. Can thermal overload protection be used in conjunction with other protective devices?
Yes, thermal overload protection can be used alongside other protective devices like fuses or circuit breakers, offering a layered approach to motor safety and improving overall system reliability.
12. How does a thermal overload relay reset after an overload condition?
After an overload condition, the thermal overload relay can be reset manually or automatically, depending on the model. Once the motor cools and the current returns to normal, the relay allows the circuit to resume operation.
13. Are thermal overload relays compliant with Australian electrical standards?
Yes, thermal overload relays supplied by Fastron Electronics are designed to meet the relevant Australian electrical standards, ensuring safety, reliability, and performance across various applications.
14. Can thermal overload relays be adjusted for different protection settings?
Yes, thermal overload relays come with adjustable current settings, allowing you to customise the protection level based on the motor's operational needs and the specific load conditions.
15. What types of equipment require thermal overload protection in electrical circuits?
Thermal overload protection is essential for equipment such as fans, compressors, conveyors, and other motor-driven systems. It helps prevent overheating and extends the lifespan of critical machinery in both commercial and industrial environments.
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