Power Supplies; Hot Spare Feature; Removing The Power Supply Unit Blank - Dell PowerEdge R530 Owner's Manual

Removing the cooling shroud
Removing the (optional) expansion-card riser
Installing the (optional) expansion-card riser
Installing the cooling shroud

Power supplies

Your system supports:
• Two 495 W, 750 W, or 1100 W AC power supply modules
• One cabled 450 W power supply module (non-redundant)
• Two 750 W DC power supply modules
– When two identical power supplies are installed, the power supply configuration is redundant (1 +
1). In redundant mode, power is supplied to the system equally from both power supplies to
maximize efficiency.
– When only one power supply is installed, the power supply configuration is non-redundant (1 + 0).
Power is supplied to the system only by the single power supply.
– When configured in a 2+0 configuration, 1+1 redundancy will not be supported.
NOTE: If two power supplies are used, they must be of the same type and must have the same
maximum output power.

Hot Spare feature

Your system supports the Hot Spare feature that significantly reduces the power overhead associated
with power supply redundancy.
When the Hot Spare feature is enabled, one of the redundant power supplies is switched to a sleep state.
The active power supply supports 100% of the load, thus operating at higher efficiency. The power supply
in the sleep state monitors output voltage of the active power supply. If the output voltage of the active
power supply drops, the power supply in the sleep state returns to an active output state.
If having both power supplies active is more efficient than having one power supply in a sleep state, the
active power supply can also activate a sleeping power supply.
The default power supply settings are as follows:
• If the load on the active power supply is more than 50%, then the redundant power supply is switched
to the active state.
• If the load on the active power supply falls below 20%, then the redundant power supply is switched
to the sleep state
You can configure the Hot Spare feature using the iDRAC settings. For more information on iDRAC
settings, see the Integrated Dell Remote Access Controller User's Guide at dell.com/support/home.

Removing the power supply unit blank

If you are installing a second power supply unit, remove the power supply unit blank in the bay by
pulling the blank outward.
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