Any body can tell me how to test the zone interlocking for GE breaker in LV switchgear?

You can use the versa trio unit for the intelliguard ge breaker, an adapter cable is required.

The push to test button on the TIM module at the downstream breaker gives the signal to the upstream breaker for the delay setting. Looking at the TIM schematic, the input is held low, so if you remove the input wiring it should achieve the same thing, I THINK !

Timing should change.

The signals are DC levels, I would suggest measuring the output voltage just to make sure it does change.