Dell EMC VMAX 250F - Best Practices for AC Power Connections Appendix A; Best Practices Overview for AC Power Connections; Two Independent Customer-Supplied Pdus

Best practices overview for AC power connections
To assure fault tolerant power, external AC power must be supplied from independent,
customer-supplied, power distribution units (PDUs) as shown in Figure 34 on page
112.
NOTICE
For systems operating from three phase AC power, two independent and isolated AC
power sources are recommended for the two individual power zones in each rack of
the system. This provides for the highest level of redundancy and system availability.
If independent AC power is not available, there is a higher risk of data unavailability
should a power failure occur, including individual phase loss occurring in both power
zones.
NOTICE
Before connecting external AC power to EMC bays, verify that the bays have been
placed in their final position as explained in the installation guide.
Figure 34 Two independent customer-supplied PDUs
Customer’s
PDU 1
Customer’s
PDU 2
Circuit
breakers
on (|)
Circuit
breakers
on (|)
Circuit breakers - Numbers
27
28
29
30
Circuit breakers - Numbers
...
8
9
10
11
...
Power feed 1
Power feed 2
Best Practices for AC Power Connections
112 Site Planning Guide VMAX 250F, VMAX 450F, VMAX 850F, VMAX 950F with HYPERMAX OS