SR750C – AC/DC POWER SUPPLIES – BATTERY CHARGERS 750W
- Battery detection – regular battery presence and battery circuit integrity checks
- Alarm relay outputs
- Deep discharge protection for batteries
- ECB for battery overload & short circuit protection
- Fused reverse battery polarity protection
Helios Power Solutions No-Break ™ DC UPS technology represents a truly unique, comprehensive approach to providing uninterruptible and secure DC power when you need it.
No-Break ™ DC UPS systems maximise the integrity of standby battery installations, whilst optimising the life and availability of back up batteries. They are now available with Serial and Ethernet Communications options.
The No-Break ™ system is the ideal solution for:
- Critical systems of 100W to 750W (and above using parallel operation)
- Applications requiring continuous on-line monitoring of battery and charger status
- Providing cost-effective management of your battery system investment
Other features include:
- Ability to view power supply data remotely
- Automatic or manually initiated battery condition testing to ensure availability of standby power
- The battery condition test feature of the No-Break ™ DC system determines the condition of the back-up batteries and will provide an early warning of potential failure. This gives plant operators enough warning to replace the faulty batteries before they are required, like in the event of a mains power failure. Battery condition tests are mandatory on some fire alarm systems and are now commonly specified by consultants for critical industrial systems.
SERIES TABLE
| Model | Output (V) | PSU Rated (A) | Power (W) |
| SR750C12 | 13.8 | 54 | 750 |
| SR750C24 | 27.6 | 27 | 750 |
| SR750C30 | 34.5 | 21 | 750 |
| SR750C36 | 41.4 | 18 | 750 |
| SR750C48 | 55.2 | 13.5 | 750 |
SPECIFICATIONS TABLE
| ELECTRICAL | |
| Input | 180V – 264VAC |
| Frecuency | 45-65Hz |
| Fusing | 5A input fuse and varistor Battery fuse plus ECB for battery circuit |
| Overcurrent protection | Constant current limit under overload and short circuit conditions |
| Isolation | 1KV DC input – output / earth |
| Efficiency | > 85% |
| Voltage adj. range | 85 – 105% of Vout |
| Temp. compensation | Temperature sensor on 1.7m lead with adhesive pad: -4mV / °C / cell ±10% |
| Hold-up time | 20 ms without battery (nominal – max. Vin) |
| Alarms | Mains fail (or PSU in standby mode) |
| Battery System OK – alarms when battery voltage low (on mains fail) , battery missing, battery circuit wiring faulty, BCT fail (if enabled) | |
| Alarm relay contacts | C – NO – NC full changeover rated 1A /50V DC, 32VAC |
| PHYSICAL | |
| AC Input Connector | IEC320 inlet socket |
| DC connections | M8 brass stud or plug-in/ screw terminal block |
| Alarm connections | Plug in screw terminal block |
| Dimensions | 225W x 304D x 70H mm (excluding mounting feet and terminals) |
