I am trying to find a generalized Instrumentation amplifier component on LT Spice, since I want to import a new In-amp library.
But I am unable to find it.
Please guide me.

 

AFAIK there isn't one as I understand the meaning of the term. You can easily construct one from generic opamps with or without power supply connections.

 

Use U1, U2, & U3 to construct a subcircuit for your generic INA. Substitute any generic opamp with or without power pins for the TL072.

 

I am trying to find a generalized Instrumentation amplifier component on LT Spice, since I want to import a new In-amp library.

So if I understand correctly, you want to import a new In-amp model.
For that I just modify a symbol already in LTspice that has the same pinout as the new model.
So, for example, if your In-amp has the typical 8 pins (as below), then I edit its symbol to reference the new model and pinout, change the symbol name, and save the symbol with the new In-amp name.

Also put the new model file into the sub folder in your LTspice file location.

Then when you reboot LTspice, it should show the new device.

 

I thought the TS was asking for a generalized INA model, with explicit parameters as attributes, not an additional model of an existing part. My mistake if that was his intention.