300A Sub-rack Power Supply with Power Distribution and Battery
Monitory Fuction
1. ET48300-005 System Configuration Description
ET48300-005 sub-rack power supply 5U height compact design to meet
critic
alapplication needs of fiber and microwave transmission, access
device,
switch. The system maximum power is 300A, with AC/battery/load
MCBs.
The cables are front accessing with MCB and busbar
Sub-rack power supplies are specifically designed to provide power
to equipment within a sub-rack or subunit of a larger system.
These power supplies are commonly used in telecommunications,
networking, and data center applications where modular equipment is
housed in sub-racks.
Key features of sub-rack power supplies may include:
Modular design to fit into standard sub-rack configurations
High efficiency to minimize power consumption and heat generation
Multiple output channels to supply power to different components
within the sub-rack
Hot-swappable or hot-pluggable modules for easy maintenance and
upgrades
Remote monitoring and management capabilities for enhanced control
and troubleshooting
Overcurrent, overvoltage, and short circuit protection to ensure
the safety of connected equipment
Compatibility with various input voltage ranges to adapt to
different power sources
Overall, sub-rack power supplies play a critical role in providing
reliable and efficient power distribution within subunits of larger
systems.
ET48300-005 consists of distribution unit, rectifier module,
conversion module, monitoring module. The configuration is
optional, as table below:
| Configuration | Rectifier module | Remark |
| Standard | GB 4943 | For details, please refer to the specifications of modules |
| Standard | IEC/EN 62368-1 |
| Standard | EN 55032 Class A,GR1089 Issue 4 ,R3-10, R3-11, R3-12 Class B
certified by North America |
| Standard | EN300386,CLASSA |
2. Sub-rack Power Supply Quick Details:
| Place of Origin: Shenzhen, China (Mainland) | Input Voltage: AC220V or DC48V |
| Brand Name: ESTEL | Output Voltage: AC220V or DC48V |
| Model Number: ET48300-005 | Rectifier Module Output Power: 30KW |
| Product Name: Industrial Power Supplies | Input Frequency 45~65Hz |
| Certification: ISO9001, CE, 3C, FCC, TLC | Max. Rectifier Module Output Current: 50A |
| Application: Industrial Equipment | Power Factor: >0.99 |
3. Sub-rack Power Supply Configuration
Telecom rectifier systems are crucial components in
telecommunications infrastructure, providing power conversion and
management for reliable operation.
These systems typically include rectifiers, controllers, batteries,
and various communication ports to ensure uninterrupted power
supply to critical equipment.
Key features of a typical telecom rectifier system may include:
Rectifiers for converting AC power to DC power efficiently
Battery management systems to monitor and maintain battery health
Communication ports such as RS485, internet ports, dry contacts for
networking and remote monitoring
Hot-swappable components for easy maintenance and minimal downtime
Wide input voltage range to adapt to fluctuating power grid
conditions
Compact design for space-saving installations in telecom
environments Overall, telecom rectifier systems play a vital role
in ensuring continuous and reliable power supply to telecom
infrastructure, supporting seamless communication services.
Two operating methods:
(1) AC input: Startup rectifier module after AC powered-on, outputs
-48Vdc, at the same time charge the battery and power the
conversion module, conversion module outputs 220Vac.
Under normal conditions, the parameters of rectifier module and
distribution unit are all under controll of the monitoring module,
operating according to the preset parameters or user’s commands. If
AC mains fault, the battery will power to the system, and continue
outputing - 48 VDC and 220 vac, with the discharge of the battery,
the voltage of the battery starts to descend, when the voltage is
under 43.2 V + / - 0.5 V, the monitoring module send battery
under-voltage signal and close the load output directly, then the
power system will stop working. When external AC mains recovers,
the system will normally work again. (All above monitoring data are
system default values and can be reset by user)
(2) -48V input: No AC current or no AC be connected, access
external power -48V to -48V load port, startup monitoring and
conversion module, 220Vac output.
Temperature compensation function is on by default, which can be
activated or forbiddened by user’s command if necessary. Operation
temperature ≥55℃, the power output of the power supply will be
linearly reduced (@65℃,output power will be 1300W).
4. Application
(1) Integration access
(2) Indoor distribution and extension system
(3) Mobile station and extension coverage system
(4) WLAN
(5) Satellite communication ground station and microwave
communication station
(6) Weak current distribution room
(7) Other AC/DC uninterruptible power system
5. Sub-rack Power Supply Pictures
6. Packing and Shipping
