Critical power
Integrated Power Supply
SMPS-based power for railway signalling and telecom loads. Float and boost charging, inverters, DC-DC converters, battery management and remote monitoring, in one rack.
IPS: RDSO approval in progress.
One continuous power source
The Integrated Power Supply is the single source of continuous power for AC and DC signalling circuits at a station or block hut. It takes a single-phase mains feed, charges and manages the battery bank, and distributes regulated AC and DC outputs to every signalling and telecom load, with remote monitoring of each node.
Modules are hot-swappable within the rack, and a faulty module can be replaced in under 20 minutes without taking the installation out of service.
Inside the rack
Float rectifier cum boost charger
110 V DC, 20 A modules in (n+1) parallel with one cold standby, feeding the battery, converters, inverters and direct loads.
AC section
(n+1) DC-AC inverter modules with an AC-AC module and static switch for uninterrupted 110 V AC output.
DC section
DC-DC converter modules in (n+1) configuration, rated to the load schedule, on the 110 V DC bus.
Battery section
110 V DC battery bank of 120, 200 or 300 Ah, with automatic float and boost changeover.
Monitoring
Status panel with critical alarms for the station master, plus remote monitoring to RDSO's RDPMS specification.
Enclosure
Stainless steel SS-304 cubicle; IP31 indoors, IP53 for location boxes.
Key specifications
Parameters per RDSO/SPN/165/2023 Ver. 4.0 with Amendment 1. Rack size, module count and output schedule are configured per installation.
Input and charger
| Parameter | Value |
|---|---|
| Nominal input | 230 V AC, 50 Hz, single phase |
| Input voltage range | 150 to 275 V AC, 48 to 52 Hz |
| Out-of-limit input | Automatic disconnection within 500 ms with alarm; automatic resumption |
| FRBC module rating | 110 V DC, 20 A, switching at 20 kHz and above |
| Efficiency | Greater than 85% in float and boost modes |
| Power factor | Greater than 0.9, with active power factor correction |
| Load sharing | Within ±10% between 50% and 100% load |
| Psophometric noise | Within 5 mV at full load with battery |
Inverter and DC-DC converters
| Parameter | Value |
|---|---|
| Inverter input | 98 to 138 V DC, nominal 110 V DC |
| Inverter output | 110 V AC ±1.5%, 50 Hz ±1 Hz |
| Inverter overload | 125% for 24 hours; 200% for 300 ms |
| Inverter efficiency | Not less than 85% at full load |
| DC-DC input | 98 to 138 V DC |
| DC-DC outputs | From 3–6 V / 0.1 A up to 100–150 V / 5 A |
| DC-DC regulation | ±1% from 10% to full load |
| Protection | Over-voltage at about 110% of maximum output, and short circuit |
Battery and reliability
| Parameter | Value |
|---|---|
| Battery bank | 110 V DC, 120, 200 or 300 Ah; cell type to customer requirement |
| End-of-discharge voltage | 1.80 V per cell ±0.012 V |
| Module MTBF | Not less than 35,000 hours |
| Fan MTBF | Better than 70,000 hours at 40 °C |
| Module replacement time | Under 20 minutes |
Testing and support
Type tested
Insulation, high voltage, temperature rise, performance, protection, climatic, vibration and 7 kV static discharge tests.
Every module tested
Routine tests on every module of every system, with results submitted to the inspecting authority.
Support
Supervised commissioning, training, spares and maintenance support, with module-level replacement in service.
Size an IPS for your installation
Send us your AC and DC load schedule, battery capacity and site conditions, and we will configure the rack.
Talk to our engineers