Is such a circuit suitable for testing a power thyristor?

Question

Electronics

Scheme one
The thyristor is something like this

Answer 1

Everything is correct there, only in the signature to the diagram, paragraph 7 contradicts paragraph 3: if the lamp continues to burn at direct current after the button is released, then the thyristor is not broken at all, but is quite normal. A normal thyristor, if given an impulse to open, opened and continues to be open, if the load current was removed, it closed. The removal of the load current on alternating current occurs 100 times per second, and on direct current - only from an external break in the circuit (although exceptions are possible).

Thyristor is like this

There are nuances associated with the magnitude of the control current. For such thyristors, it is quite large, and it may turn out that the circuit does not provide such a current. This may look like a malfunction, but it is not - you just need to give more current.