§10. Attentions when testing Solid State Relays
1) First the relationship between the output current and the shell temperature (ambient temperature) should be known before testing to avoid permanent damage to the SSR caused by overload, because the rated output current will drop when the case temperature rises or with no radiator.
2) When testing the turn-on and turn-off voltage of DC-SSR, the input voltage cannot remain in the state between on and off for too long, otherwise the power consumption of the output terminal rises sharply and burns out the output switching components.
3) Do not arbitrarily speed up the action rate during the test (usually one period of the input signal should be more than 5 times the sum of the on/off times), otherwise the SSR relay will not work due to the large dynamic-switching-loss, or even the output switching components will be burnt out.
4) The solid state relays cannot achieve complete isolation between the output terminals in the off state, and there will be a certain leakage current at the output terminal. When the dielectric withstand voltage and insulation resistance are tested at a higher voltage, it is prone to electric shock, so the insulation resistance or the withstand voltage must not be tested on the output terminals.
