- Home
- Our Products
- DC UPS SystemDC UPS Systems Power Supply + Battery Charger in one single unit Our Smart DC UPS Systems have ethernet-based communications and control in every model and are suitable for standby and cyclic applications. Some of the load and battery monitorable parameters are: Mains fails – PSU fails Battery missing – Battery low Charge current control Monitoring and reporting of battery current and state of charge Low voltage disconnect operation Automatic battery test Battery temperature compensation Multi-stage Charging modes ( Boost – Absorption – Float – Recovery) 12V DC UPS 24V DC UPS 48V DC UPS 110V DC UPS
- AC DC Power Supplies
- Battery Chargers
- AC UPS & Transfer Systems
- Batteries
- DC/AC Inverters
- DC/DC Converters
- DC Power Systems & Accessories
- Battery Monitoring & Conditioning
- Power Quality & Power Factor Correction
- Surge Protection
- Lightning & Grounding
- Low Voltage Power & Grounding Connections
- Electrical Fixing, Fastening & Support Products
- Custom Solutions
- Solutions by Industry
- Services
- Support
- About Us
- News
- Contact Us
- My Enquiries
- Home
- Our Products
- DC UPS SystemDC UPS Systems Power Supply + Battery Charger in one single unit Our Smart DC UPS Systems have ethernet-based communications and control in every model and are suitable for standby and cyclic applications. Some of the load and battery monitorable parameters are: Mains fails – PSU fails Battery missing – Battery low Charge current control Monitoring and reporting of battery current and state of charge Low voltage disconnect operation Automatic battery test Battery temperature compensation Multi-stage Charging modes ( Boost – Absorption – Float – Recovery) 12V DC UPS 24V DC UPS 48V DC UPS 110V DC UPS
- AC DC Power Supplies
- Battery Chargers
- AC UPS & Transfer Systems
- Batteries
- DC/AC Inverters
- DC/DC Converters
- DC Power Systems & Accessories
- Battery Monitoring & Conditioning
- Power Quality & Power Factor Correction
- Surge Protection
- Lightning & Grounding
- Low Voltage Power & Grounding Connections
- Electrical Fixing, Fastening & Support Products
- Custom Solutions
- Solutions by Industry
- Services
- Support
- About Us
- News
- Contact Us
- My Enquiries
Product Information
- DC UPS with output voltage options from 12V to 48VDC
- Standard temperature-compensated charging
- Optional Communication Port: RS232 , RS485 , Modbus RTU & SNMP
- Power loss & battery system alarms
- Rugged design and construction for long life and challenging environments
SKU: HPS-DC-UPS-SR750HI
- Description
- SERIES TABLE
- SPECIFICATIONS TABLE
- OPTIONAL FEATURES
- MODELS REPLACED BY SR750HI
- MODBUS & SNMP DOWNLOADS
- FAQ
- History
The New No-Break ™ DC UPS SR750HI 750W is designed to provide DC power to lead-acid batteries for critical backup applications from 12V to 48VDC. The No-Break ™ range of DC UPS systems maximise the integrity of standby battery installations, whilst optimising the life and availability of backup batteries.
A built-in Low Voltage Disconnect (LVD) will protect the battery from over-discharge after extended periods of backup operation when AC power has failed. The standalone unit comes with a standard remote battery temperature sensor (1.7m lead) for accurate charge voltage compensation.
Our range of SRHI DC UPS 100W-750W models have relay alarms for monitoring battery status, mains, PSU failure parameters and activation of BCT (battery condition test). The new SR500HI & SR750HI models have improved their thermal reliability with two fans relocated to dissipate heat more effectively and increase life span of critical components such as capacitors, shunts, and transformers.
The unit comes with a standard input voltage of 180-264VAC but it can be easily customised to 88-132VAC for the American market. It can also be used as a DC-DC converter, for more information about this application please contact our team of engineers at sales@heliosps.co.nz
Options
- American Input Voltage 110 VAC ( 88 – 135 VAC)
- Communication Port
- RS232 (ASCII)
- RS485 (ASCII)
- MODBUS RTU
- SNMP, webpages
- Digital Input/Outputs: Customizable 2 digital inputs & 1 digital output
- Internal meter
- Battery Condition Test : Option auto test enabled on start-up
- Mounting: 19″ Rack Mount with V/I meter available, Wall mount
- N+1 redundancy
- Boost Charger
- Conformal Coating for harsh environments
- DC Connectors:
- M8 brass stud
- Plug-in style phoenix socket & mating screw terminal
- Anderson plug-in style connectors
Main Features
- Separate outputs for load and battery
- Battery detection—regular battery presence and battery circuit integrity checks
- Ability to view power supply data remotely
- Automatic or manually initiated battery condition testing to ensure availability of standby power
- Battery Condition Test : Indicative test of battery autonomy at predetermined intervals (automated battery condition check, ideal for remote sites).
- Standard remote battery temperature sensor for accurate charge voltage compensation
- Battery deep discharge protection
- Adjustable load
- Power loss & battery system alarms
- No transition switching to backup battery
- Rugged design and construction for long life and challenging environments
- Thermal reliability improved by using double fan cooling system
- Serviced in New Zealand: Our highly qualified service engineers perform repairs down to component level meaning expensive total replacement costs can, in most situations, be avoided.
The No-Break ™ system is the ideal solution for:
- Critical infrastructure systems from 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
- Harsh environments and remote applications
Applications
- Security Systems – Access Control
- Industrial Processes Switching Protection
- SCADA & Automation
- Radio Repeaters – Remote Sites
SERIES TABLE
| Model | Output (V) | PSU Rated (A) | Charge Limit (A)*1 | Recommended Load (A) | Peak Load on Power Fail (A) |
| SR750HI12 | 13.8V | 54A | 54A | 40A | 59A |
| SR750HI24 | 27.6V | 27A | 27A | 20A | 30A |
| SR750HI30 | 34.5V | 21A | 21A | 15A | 23A |
| SR750HI36 | 41.4V | 18A | 18A | 13A | 20A |
| SR750HI48 | 55.2V | 13.5A | 13.5A | 10A | 15A |
*Default is 100% PSU rated (A), can be customizable
SPECIFICATIONS TABLE
| Output power | 750W |
| Input Voltage | 180V-264VAC 88V-132VAC (on-request) |
| Output Voltages | 12V, 24V, 30V, 36V, 48V |
| Voltage Adj. Range | 85% – 120% of Vout |
| Frequency | 45-65Hz |
| Fusing/Protection | Input fuse and varistor Battery fuse plus ECB for battery circuit |
| Overcurrent protection | Constant current limit under overload and short circuit conditions |
| Isolation | Input – earth – 2.5KVdc Output – earth – 500Vdc |
| Efficiency | > 85% |
| Noise | <1% |
| Operating temperature | -20 to 50 °C ambient at full load |
| OVP | Over-voltage protection on output at ~130% of nominal output voltage |
| Humidity | 0 – 95% relative humidity non – condensing |
| Cooling | Fan cooled ( 2 fans) |
| LED Indication | Green: Batt OK |
| Green: Power OK | |
| Flash code for | |
| Alarms Relay | Form C contacts 30VDC,2A/110VDC,0.3A,125VAC, 0.5A AUX (Activated by BCT, Fan fail/stall (toggle every 5 sec)) POWER (main fails, PSU fails) BATTERY (batt missing , batt low, BCT fail) |
| Temp. Compensation | Temperature sensor on 1.7m lead with adhesive pad: -4mV/ °C / cell ± 10% (customizable) |
| Battery Charge Current Limit | Customizable on request. |
| Battery Monitoring | Detects for presence of battery on start up, then every 60 minutes when charge current < 200mA |
| Battery Circuit Protection | Electronic circuit breaker (ECB) operates under the following conditions: Low Battery Volts: Battery Voltage drops to 1.67V/cell Overload: Max load must not exceed 110% of rated current. Peak loads must be connected to B+ & B– terminals. Not suitable for N+1 connection Short Circuit: <2ms, backed up by fuse |
OPTIONAL FEATURES
| Optional Input Voltage | 88 – 132 VAC |
| Communication Port | · RS232 (ASCII) · RS485 (ASCII) · Modbus RTU · SNMP, Webpages |
| Digital Inputs/Outputs | Digital Input (pins 1,2) / Input or Output (pin 3) / Return (pin 4) |
| Battery Condition Test (BCT) | Option auto test enabled on start-up |
| Mounting | · Standalone |
| · 19”Rack Mount . Optional V/I meter for subrack : SR-Meter | |
| · Wall – Floor Mount Cabinet | |
| Internal Meter | Internal V/I meter displaying PSU and battery operating states and analogue |
| N+1 Redundancy | Using 2 charges each & output diodes |
| Boost Charger | Customizable feature on request for boost charging capabilities |
| Conformal Coating | For harsh environments |
| Temp. Compensation | Customizable temperature sensor length and voltage/DegC/cell |
MODELS REPLACED BY SR750HI
| Item Code | Description | New Model |
| SR750C12TFSL | System No-Break DC UPS 12V 750W | SR750HI12TFSL |
| SR750C12TFSU | Sys No-Break DC UPS110Vac>13.8Vdc 750W | It will be given a custom model number using the SR750HI |
| SR750C24FXL | Sys No-Break DC UPS 24Vdc 750W alarms, no tempco, 2 x 4way Phoenix conns, | SR750HI24TFXL |
| SR750C24TFSL | Charger DC UPS 24V 750W alarms, tempco, LVD | SR750HI24TFSL |
| SR750C24TFSU | Sys No-Break 110VAC 24V 750W | It will be given a custom model number using the SR750HI |
| SR750C24TFXL | Sys No-Break DC UPS 24Vdc 750W alarms, tempco, 2 x 4way Phoenix conns, | SR750HI24TFXL |
| SR750C24TFXL-01 | System No-Break 24V 750W (Phoenix connectors) Special micro manual boost | It will be given a custom model number using the SR750HI |
| SR750C24TFXU | Sys No-Break 24Vdc 750W 110Vac input (2 x 4way Phoenix conns) | It will be given a custom model number using the SR750HI |
| SR750C30TFSL | System No-Break 34.5V 750W | SR750HI30TFSL |
| SR750C30TFXL | System No-Break 34.5V 750W | SR750HI30TFXL |
| SR750C48TFSL | System No-Break 48V 750W | SR750HI48TFSL |
| SR750C48TFXL | Sys No-Break DC UPS 48V 750W | SR750HI48TFXL |
| SR750I12TFSL485 | Sys No Break 12V 750W FAN RS485 Comms Interface | SR750HI12TFSL-485 |
| SR750I24TFSL-LAN+ | No-Break DC charger 24V 750W with ethernet | SR750HI24TFSL-LAN+ |
| SR750I48TFSL-LAN+ | Sys No-Break DC 48V 750W with ethernet/SNMP | SR750HI48TFSL-LAN+ |
| SR750I48TFSL485 | Sys No Break 48V 750W FAN RS485 Comms Interface | SR750HI48TFSL-485 |
| SR750I48TFXL-485 | Sys No Break 48V 750W FAN RS485 Comms Interface | SR750HI48TFXL-485 |
| SR750I24TFSL485 | No-Break DC charger 24V 750W with RS485 communication port | SR750HI24TFSL-485 |
| SR750I48TFXL-LAN+ | Sys No-Break DC 48V 750W with ethernet/SNMP | SR750HI48TFXL-LAN+ |
| SR750I12TFSL-LAN+ | Charger -DC UPS 13.8VDC 750W with ethernet/ | SR750HI12TFSL-LAN+ |
MODBUS & SNMP DOWNLOADS
SR – SRH Series – Downloads
FAQ
- Why is Helios Power Solutions SR No-Break ; DC charger recommended by consultants for critical applications?
Our No-Break ™ DC chargers have been designed for industrial use and have over twenty years of proven reliable operations. In addition, the chargers have many outstanding features such as fault alarms, LED fault alarm codes, battery detection, low voltage disconnect circuitry, automatic battery condition testing, communication options and can be connected to the battery permanently due to the precise temperature-compensated voltage control.
- Why should we use a SR No-Break; as opposed to a normal float charger?
The No-Break ™ DC UPS has many features which a normal float charger does not, these including:
- Precise alarm indication for mains or DC faults
- Overcurrent protection on the battery circuit
- Battery presence checking
- Temperature-compensated charging
- Low voltage disconnect circuitry to prevent deep discharge of the battery
- Independent charge current limit
- Automatic battery condition testing
- Can I use the SR No-Break DC UPS without a battery?
No, the No-Break ™DC UPS is designed to operate with a battery connected and instability may result if there is no battery connected. If you wanted to do this then it is advisable to use a standard two-terminal DC power supply SR500HL
- Why is the battery negative separate from the load negative in the SR No-Break DC UPS?
This is done to implement two of the features of the No-Break ™ UPS/charger. There is an “electronic circuit breaker” fitted between the battery negative and load negative terminals to provide the battery overcurrent protection. The separate battery circuit also allows for independent control of the charging current when required.
- Can I connect the battery directly to the load terminals when using SR No-Break DC UPS?
No, it would nullify all the features of using the No-Break ™DC design and provide false alarm signals from the relays. If you wanted to do this, then it is advisable to use a standard two-terminal float charger, with or without alarms.
- When does the SR No-Break system disconnect to protect deep discharge of the battery?
At approximately 1.67 volts per 2V (nominal) cell, so for a 12V system the disconnect voltage is set at 10V.
History
Helios Power Solutions has been manufacturing the SR No-Break Series (100W-750 DC UPS) for more than 40 years in Auckland – New Zealand. The No-Break ™ DC UPS series has evolved with new technologies and most important, our customer’s feedback.
All the functionality and durability has been retained with a more modern and easier to understand range of products being developed.
Form factor and connectivity remains the same, so they will fit into the slots occupied by the old range – the legend continues!
Case Study
You may also like...
© Copyright Helios Power Solutions 2022