You can read the Power drawn per port on the 2530 with the following CLI command:
hp2530# show power-over-ethernet brief
Status and Counters - Port Power Status
PoE | Power Power Alloc Alloc Actual Config Detection Power Pre-std
Port | Enable Priority By Power Power Type Status Class Detect
----- + ------ -------- ----- ----- ------ -------- ----------- ----- ------
1 | Yes low usage 17 W 0.0 W Searching 0 on
2 | Yes low usage 17 W 0.0 W Searching 0 on
3 | Yes low value 15 W 0.0 W Searching 0 on
4 | Yes low usage 17 W 0.0 W Searching 0 on
5 | Yes low lldp 17 W 7.6 W Delivering 4 on
6 | Yes low usage 17 W 0.0 W Searching 0 on
7 | Yes low usage 17 W 0.0 W Searching 0 on
8 | Yes low usage 17 W 0.0 W Searching 0 on