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Lenovo 46M4002 Installation And Maintenance Manual
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PDU load groupsThe PDU load groups are described in the following tables.Table 1. Switched and monitored 1U C19 PDU load groupsCircuit breaker number Associated front outlet Associated rear outletPhase (when using 3-phase input power)1 1 10 12 23 34 4 11 25 56 67 7 12 38 89 9Table 2. Switched and monitored 1U C13 PDU load groupsCircuit breaker numberAssociated outlets (The loadsegment number that is visible onthe front of the PDU is inparentheses.)Phase (when using 3-phase inputpower)1 1 and 2 (1) 12 3 and 4 (2)3 5 and 6 (3) 24 7 and 8 (4)5 9 and 10 (5) 36 11 and 12 (6)Load balancingThe internal circuits of some PDUs might be overloaded if you are not aware of the circuit breakerspecifications and how the PDU outlets are connected. If loads are greater than the specification of thecircuit breaker, it will trip and turn off the load.There are either six or nine circuit breakers on the front of the PDU, depending on the model. Each circuitbreaker is rated for 20 amps. When you connect loads, make sure that the rating for each circuit breaker isnot exceeded.Some PDUs can be connected to three-phase power. The loads should be distributed across all threephases. If single-phase power is used, it also is important to distribute the load between the outlet groups.The PDU models with 12 C13 outlets on the front have phase one connected to the first 4 outlets, outletgroup one. Phase two is connected to the next 4 outlets, outlet group two and phase three are connected tothe last 4 outlets, outlet group three (see the following illustration).Chapter 1. Introduction 7 |
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