Sizing a Power System

1. Determine the Power System required: Standard or NEC2400 (NEC2400 power systems include a CEMF in order to regulate the voltages range between 50.5 Volts to 42 Volts).
   
2. Check the switch configuration, when it is complete, determine Amps of 48 Volts that configuration will require.
   
3. Select the type power system, either a Power System that will support batteries or a Power System that will not support batteries.
   
4. If the Power System will have no batteries select the PS system that will supply the Amps your switch will require.
   
5. If the Power system will have batteries then select the PRS system that will supply the Amps required. If you require battery backup the system selection charts are separated by battery backup time. The Power Boards are sized to supply the system load Amps plus the Amps needed to recharge the battery in 24 hours. The batteries are sized to supply the system Amps for the times indicated, 1 Hour Backup, 2 Hour Backup, 4 Hour Backup or 8 Hour Backup. Both PRS and PB Systems are specified depending on the Amp load and the backup time required. The system charts provide Model numbers for the complete Power and Battery System to reduce the time to bid or order your Magnetek Power System.
   
6. If later upgrades to the switch are anticipated, you may choose to include the additional power now. Be sure the System controller ammeter shunt and LVDC are large enough to handle the maximum Amps for the upgrade. If a battery disconnect device is used it should be sized to handle the charger upgrades. Magnetek Telecom Power Technical Sales Engineers are available to help configure the power system.
   
7. The number of output breakers has been selected to provide one for each PIM with at least one additional breaker for other circuits.
8. There are two ways to identify the Power System you have selected, by Model number or Part number. The Part number is very specific and should be used for purchase orders. The Model number describes the major system components and is useful for discussing the equipment with Magnetek Telecom Power engineers or maintenance personnel.