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Thermal Relays Classic Range
Thermal Relays Classic Range: these are electromechanical overload protection devices designed for motor circuits, typically used in conjunction with contactors. They operate on the bimetallic strip principle, providing inverse time-current characteristics to protect against phase loss and prolonged overloads. Key technical parameters include se...
Thermal Relays Classic Range: these are electromechanical overload protection devices designed for motor circuits, typically used in conjunction with contactors. They operate on the bimetallic strip principle, providing inverse time-current characteristics to protect against phase loss and prolonged overloads. Key technical parameters include setting current range (e.g., 0.1-630A), trip class (Class 10, 20, or 30), and ambient temperature compensation. They are available in direct mounting or separate mounting versions, with manual or automatic reset options. In some regions, they are also referred to as overload relays or thermal overload switches.
These relays are primarily installed in motor control centers (MCCs), distribution panels, and industrial automation cabinets. They are essential in sectors such as water treatment, HVAC, conveyor systems, pump stations, and manufacturing lines where induction motors are prevalent. They ensure continuous operation by preventing thermal damage from sustained overcurrents, especially in star-delta or direct-on-line starting configurations.
The main subcategories include the Classic Range with fixed or adjustable setting dials. Key article codes often follow a pattern like "TA" or "TF" series (e.g., TA25DU, TA75DU, TF42), where the number indicates the maximum current rating. For example, TA25DU covers 0.1-25A, while TA75DU covers 17-75A. These codes typically include suffixes for mounting type (e.g., -D for direct mounting on contactors). Always verify the trip class and auxiliary contact configuration for your specific application.
We offer express worldwide shipping on all Thermal Relays Classic Range, with real-time pricing and stock availability. Our team of specialized electrical engineers provides personalized technical support to help you select the correct relay based on motor FLA, ambient conditions, and coordination studies. Documentation, including trip curves and dimensional drawings, is available for every article.
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