How to read ELCB (earth leakage circuit breaker)?

Question

ELCB 20mA 32A and also 2P or 4P

whats does the P means. what it does?

Answer 1

2P and 4P are two and four pole, meaning how many wires are monitored.

32A is the capacity of the breaker. 20mA is the leakage current that will trip the breaker.