IEC Manual Motor Starters
Non-Reversing Starters with Thermal Overloads
These non-reversing IEC manual motor starters with thermal overload relays connect and disconnect power to motors and other high-current equipment and machinery in a single direction. Thermal overloads, also known as heaters, prompt motor starters to break electrical connections with downstream equipment once a set temperature is reached to protect connected loads from overheating and causing damage. They contain either bimetallic strips or melting alloy solder materials. When the current exceeds a predetermined threshold and temperatures rise, the material bends or liquefies, causing the thermal unit to break the circuit and cause the motor starter to break its power contacts. As the materials cool down, they will return to their normally closed position and the circuit can be reset automatically or manually.
3 Pole / Three Phase Starters
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Non-Reversing Starters with Electronic Overloads
These non-reversing IEC manual motor starters with electronic overloads connect and disconnect power to motors and other high-current equipment and machinery in a single direction. Electronic overload relays trigger motor starters to break electrical connections with downstream equipment once the current reaches a pre-determined range of full-load amperage. They have adjustable current settings and use semiconductors to monitor for overload conditions and trip once the current exceeds that set point. Electronic overload relays turn circuits on and off faster, are more accurate, and have longer service lives than thermal overload relays.
3 Pole / Three Phase Starters
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