20 MX28B
MX28B + STATUS ALARMS SYSTEM MODULES BATT PIN OEM
Figure 5.9-1
5.9.2 System Parameters Verification/Adjustment
The MX28B system control unit is delivered with pre-programmed parameter default
settings. A complete listing and description of all system configuration parameters as well
as displayable system status and information is provided in Section 6. Read Section 6 to
gain an understanding of and how to use the operational features provided by the MX28B
dc power plant. As a minimum, the following parameters should be verified and adjusted, if
required, before connecting batteries or loads to the power plant:
1) Battery Float Voltage - default = -54.00V dc (Check the manufacturer’s
recommendation for the batteries being used in the system.)
2) Battery Maximum Recharge Rate - default = 12A. (Bellcore specifications
recommend a maximum charging rate of capacity (in Ampere-hours) divided by 20
hours; check the manufacturer’s recommendation.)
3) System Voltage - measurement ≅ -54.00V dc (This is a measurement by the
system of the dc output bus voltage.)
4) LVD Option - default = “Enable” (If the MX28B does not have an LVD installed,
this should be changed to “Disable”.)
5) Rectifier Information - Check the rectifier information displays to verify that all
rectifiers installed can be viewed on the control unit display and that no rectifier
alarms are active.
Section 6 provides location information for these parameters and how to make changes if
required.
5.9.3 Full System Power Up
To complete a full system power up, perform the following steps
1) Turn OFF all the circuit breakers that supply ac power to the rectifiers in the MX28B
dc power plant.
2) Turn on the external circuit breaker from the battery to the power plant.
3) Turn on all the circuit breakers that supply ac power to the rectifiers in the MX28B
dc power plant.
4) Load circuit breakers may now be turned on as required.