Juniper MX2010 Hardware Manual page 123

Figure 32: Three-Phase Delta AC Power Distribution Module
Figure 33 on page 101 shows the three-phase delta AC PDM connections.
CAUTION:
before connecting the power input cables. If the PDM must be removed, both input
power cables must be uninstalled and removed from the PDM before the PDM can
be removed from the chassis. The MX series chassis is not sensitive to phase rotation
sequence—either clockwise or counter-clockwise will operate correctly.
Figure 33: Three-Phase Delta AC Power Distribution Module Connections
The three-phase delta AC PDM must be installed and secured in the chassis
101