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Chapter 5
Figure 5Table 5
5.1
Distribution Panelboard Configuration
5.2
Subfeed Breaker Configuration
5.3
Distribution Panelboard and Subfeed Breaker Configuration
EATON Powerware
Understanding PDU Operation
The PDU consists of an main input breaker, an optional transformer, a
monitoring/operation control panel, an integrated communication server, and a
distribution panel or subfeed breaker system.
Power from the AC source is routed through the main input breaker, an optional
transformer, and the panelboard input breaker to one or two 42−pole distribution
panels. Power is then distributed to the critical loads through customer−provided
branch circuit breakers.
Figure 5-1 shows the path of electrical power through the PDU with distribution
panelboards.
Power from the AC source is routed through the main input breaker and an optional
transformer to one to eight subfeed breakers. Power is then distributed to the critical
loads or other distribution panels through the subfeed breakers.
Figure 5-2 shows the path of electrical power through the PDU with subfeed
breakers.
NOTE The number of subfeed breakers depends on the breaker rating and PDU configuration.
Power from the AC source is routed through the main input breaker, an optional
transformer, and the panelboard input breaker to one 42−pole distribution panel, and
through the main input breaker and the optional transformer to one to four subfeed
breakers. Power is then distributed to the critical loads through customer−provided
branch circuit breakers or the subfeed breakers.
Figure 5-3 shows the path of electrical power through the PDU with a distribution
panelboard and subfeed breakers.
®
225 kVA PDU Installation and Operation Manual
S
164201629 Rev D www.powerware.com
5−1
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