Hi Babar,

1.
I supposed also, that you already used the standard triac snubber
circuit:
- a resistor (47 ... 220 Ohms) with a cap (47 ... 220nF) in series
- this RC parallel to the triac
- this circuit in series with a coil (1 ... 10mH)
- optional: this circuit parallel to a varistor (400V) or a bidirectional suppressor diode
- and this all in series with the load connected to the mains input

2.
my previous described circuit was not for zero crossing, only for
zero detection and work also with phase angle firing.

3.
on loads with slow reaction (heaters, big motors)
you can also use zero crossing with a variable count of
on and off waves to get an analog reaction.
E.g. 1 wave off and 3 waves on give 75% power.


Peter