Full control of your power needs
The Central Energy System is a solution to feed remote locations from a power source located in a central location
(hub) over existing or new copper networks installed with the regulatory constraints applicable to telecom networks.
The design based on the IEC (EN/UL) 60950/21 features the installation of 52 insulated and independent DC/DC
converters. The system can be connected to 48V or 60V redundant sources to provide superior availability of the
services at remote locations.
Based on IEC/EN 60950-21 RFT-C mode
The standard supports two modes for power transmission: RFT-C and RFT-V. The CES48/00L320 is designed
around the RFT-C mode to offer full safety in any conditions of operation and distance from the central office
equipment. Furthermore, the RFT-C mode is easy to dimension and implement. The current limitation avoids
potential overheating of cables.
Safe far beyond requirements
The remote feeding solution from Mitra E&I results from years of experience and work with leading network
operators. Beyond the requirements of the standard, each line is protected to bring the maximum current capability
well below the safety limits in case of short circuits line to line or line to ground. Feeding power at 320V in normal
operation, the voltage of each line will go independently below 50V if the line is opened.
Multiple benefits
Remote feeding solution offers numerous advantages versus traditional AC/DC conversion for remote locations.
If the most obvious advantage is to support high availability of signals while avoiding the multiplication of batteries
in the field, it also eases and supports faster network deployment. In many applications it finally brings significant
measurable cost savings compared to traditional solutions.
Easy installation and maintenance in Central Office and remote hubs
The system is designed primarily to be installed in central office equipment, but can also be installed as one
component of a delocalised power hub serving multiple small remote nodes. Designed and manufactured with
state-of-the-art technologies and processes, electronic cards are hot pluggable and very easy to install and
replace without any specific tools or special care. Monitoring of each line and converter is done by means of a led
and internal alarm. Alarms are combined at the system level to offer quick identification of failure locally or remotely.
Технические данные:
| Параметры |
Значение |
- RFT-C operatio mode
- Up to 52 output lines
- Able to feed and monitor multiple remote sites
- Wide DC input voltage range
- Dual redundant DC input feeds
- 900W output power capability
- Short circuit protection
- Open circuit protection
- Full front access
- Modular, hot pluggable modules
- Alarm management for central up-converter, transmission lines and remote sites
|
| Safety standards |
EN60950-21 RFT-C; EN60950-1 (TNV networks) |
| Additional safety feature |
Output voltage remains below 50V when the twisted pairs are not properly
connected to a Mitra E&I remote down converter |
| Number of slots |
14 slots, each slot can be used for either DC/DC up converter or control card |
| Output Voltage (twisted pairs connected to remote site) |
320VDC ± 8VDC |
| Output voltage (open circuit or low impedance loop) |
50VDC max. |
| Output current / power |
58mA per twisted pair - 232mA per card - 18W per up converter |
| Number of twisted pairs / card |
4 |
| Efficiency |
85% |
| Input connection |
2 redundant DC feeds with breaker |
| Operating input voltage |
-39.6VDC to -72VDC |
| Input current consumption |
30A max. (for 14 cards) |
| Protection |
Input redundancy, input reverse polarity, thermal shutdown, open output line,
short-circuited output line,
low impedance output line, unbalanced output line |
| Monitoring |
One monitoring can control up to four remote sites including remote feeding |
| Monitored variables |
Input feed, central fan operation, functionality of remote feeding lines, operation of
remote down converters, central and remote site general alarms, remote site out-
put voltage, line voltage (on medium and high power remote site),
line common voltage (on medium and high power remote site) |
| Visual indicators |
One green led per twisted pair - flashing when in protection mode (Uout <50V) |
| Operating temperature |
-5°C to 45°C |
| Cooling |
Fan cooled via external fan tray (vertical airflow) |
| EMC |
Complies with ES300386, ITU K-44 and ITU K-45 |
| Dimensions |
19” x 183mm x 250mm (WxHxD) - with fan tray |
| Access |
Front access for all connectors |
|
