Major Components
3.2Panel Board Voltage-Current Board (PBVI)
The PBVI board monitors two panelboards and provides the voltage attenuators for the two panel- board voltages. The two sets of panelboard main breaker CTs are connected to the PBVI board.
Connections for the 18 large branch CTs are located on the PBVI board. The nine CTs on the A side of the board are normally associated with the
The 18 large branch CT inputs can also be used to monitor up to three subfeed circuit breakers. This is configured using the Configuration tool (see 5.5 - Using the Configuration Tool). The CTs from the B side of the PBVI are
! WARNING
Before connecting a large CT to the PBVI board, note the CT MUST have 1A secondary. Connecting a 5A secondary type CT will damage the board and the CT.
To ensure the proper current ratio and accuracy, the CTs should be purchased through Emerson Network Power. See Table 1 for details. Contact your local Emerson Network Power representative or call Liebert Services at
Table 1 | CT matrix for the Liebert LDM |
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Part Number |
| Description | Phase CT | Ground CT | Neutral CT | |
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3 pole 100A Subfeed Breaker 5W CT Kit 23" Frame | 100:1 | 100:1 | 200:1 | |||
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3 pole | 200:1 | 100:1 | 500:1 | |||
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3 pole | 500:1 | 100:1 | 500:1 | |||
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3 pole | 200:1 | 100:1 | 200:1 | |||
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3 pole | 200:1 | 100:1 | 500:1 | |||
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3 pole | 500:1 | 100:1 | 500:1 | |||
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3 pole | 200:1 | — | — | |||
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3 pole | 200:1 | — | — | |||
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1 pole | 100:1 | — | — | |||
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2 pole | 100:1 | — | — | |||
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3 pole | 100:1 | — | — | |||
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5
