thermal block

How the overload relay (‘thermal block’) protects your air compressor

In this second post in the ‘part of the day’ series, I will discus an important part that is found on almost all but the smallest (<2 kW) compressors: the overload relay. The overload relay is also often called the ‘thermal block’ or ‘thermal relay’. This part protects your compressor from self-destructing when things go …

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