Diff Protection for 33KV/0.415 kv 2 mva Transformer

I've only come across diff protection on much larger transformers. If the MV/LV protection is set right then there's not much point.

It's your transformer, do you want to spend the money?

If the transformer is important to your operations then you protect it with differential and other protective relaying, if it's not you don't. Spurious trips are always a concern, only you can evaluate their impact/cost.

as such Diff prot is not required for smaller transformer but if provided then its added protection.

if stability of diff scheme is ensured then it must not operate for any unbalance in load or out of zone faults.

Hi mate

To protect your Transformer with Differential protection is not a safe guard for your Transformer ......

If your Transformer trips on Diff and the Diff relay settings is worked out correct then their is already a fault inside your Transformer...

For this type Transformer you can protect it with 415volt Overcurrent and Earthfault protection circuit breakers connected to the 415voltage side CT's...

Just put the correct settings on and it will trip when your Transformer gets overloaded.......

Your Differential protection does not help when the transformer gets overloaded