Normally-Closed Single Pole Single Throw SPST relay In figure 1 no DC voltage is applied to points A and B therefore no current flows through the coil of the relay, the contact stays in the close ...

The relay will have a normally open contact and a normally closed contact as well as the moveable contact. The 450 will have three spring clips on the bottom of each leg base.

A short-cycling situation would occur. If the contacts are stuck in the closed position, the relay would have to be checked with a voltmeter in the running mode, since the contacts between 1 and 2 are ...