How to abb 3 pol breaker

I'm assuming you're asking how to abbreviate "3 pole breaker".

Here are a few common abbreviations:

Note that the abbreviation may vary depending on the context and industry. For example, in electrical engineering, "3P" is commonly used, while in construction or building trades, "3PH" might be more commonly used.

If you're looking for a specific abbreviation for a particular purpose, please let me know and I'll do my best to help!