This test circuit for electromechanical relays uses a microcontroller to control the relay under test through an optocoupler. A power supply and load produce current in the relay contacts.

Megger’s new SMRT1 smart protective relay test set is suited not only for testing older installations and legacy power plants, but also for meeting the future challenges associated with testing the ...

Megger’s new SMRT 36 smart protective relay test set is suited not only for testing today’s installations and legacy plant, but also for meeting the future challenges associated with testing the smart ...

Unlike other alternatives on the market, Hongfa’s HF115FP interface relay from Switchtec has a lockable test button, mechanical flag indicator and a LED that are all supplied as standard. These ...

[Viktor] got tired of having exposed high voltage on the bench during the prototyping stage of these projects so he recently built a solid state relay test box.