Solid-State Relays vs Electromechanical Relays
How solid-state relays and electromechanical relays work, how they fail, and how to choose between them for a control panel.
Overload Relays: Thermal vs Electronic and Trip Classes 10, 20, 30
How thermal and electronic overload relays protect motors, what trip classes 10, 20 and 30 mean, and how to set and reset a relay correctly.
How It Works: Timers
On-delay, off-delay, interval, one-shot, flasher and star-delta: how each timer function behaves, what starts the timing and what to check when you replace a timer.
How It Works: Relays
A practical guide to electromechanical relays: how the coil and contacts work, how to read contact forms and ratings, and when to use a contactor or...
