The New No-Break ™ DC UPS SR500HI 500W 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 firstname.lastname@example.org
|Model||Output (V)||PSU Rated (A)||Charge Limit (A)*1||Recommended Load (A)||Peak Load on Power Fail (A)|
*Default is 100% PSU rated (A), can be customizable
|Output Voltages||12V, 24V, 30V, 36V, 48V|
|Voltage Adj. Range||85% – 120% of Vout|
|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
|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|
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 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|
|· 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|
|Item Code||Description||New Model|
|SR500C12FSL||System No-Break No-Tempco 12V 500W||SR500HI12TFSL|
|SR500C12FSU||System No-Break 500W 100Vin||It will be given a custom model number using the SR500HI|
|SR500C12TFSL-02||Special NoBreak 12V 500W with battery time remaining||It will be given a custom model number using the SR500HI|
|SR500C12TFSL-03||Special NoBreak 12V 500W with battery time remaining SNMP||It will be given a custom model number using the SR500HI|
|SR500C12TFSU||System No-Break 500W 110Vin||It will be given a custom model number using the SR500HI|
|SR500C24FXL||Charger DC UPS 24V 500W alarms, LVD, no tempco, (2 x 4way Phoenix conns)||SR500HI24TFXL|
|SR500C24TFSL||Charger DC UPS 24V 500W alarms, tempco, LVD||SR500HI24TFSL|
|SR500C24TFSU||Sys No-Break 24Vdc 500W, 110VAC input||It will be given a custom model number using the SR500HL|
|SR500C24TFXG||Sys No-Break 24Vdc 500W 110Vinput no switches (2 x 4way Phoenix conns)||It will be given a custom model number using the SR500HL|
|SR500C24TFXL||Sys No-Break DC UPS 27.6VDC 500W||SR500HI24TFXL|
|SR500C24TFXU||Sys No-Break 24Vdc 500W 110Vinput (2 x 4way Phoenix conns)||It will be given a custom model number using the SR500HL|
|SR500C30TFSL||SYSTEM NO-BREAK 34.5V 500W||SR500HI30TFSL|
|SR500C48TFSL||System No-Break DC UPS 48V 500W||SR500HI48TFSL|
|SR500C48TFSL-02||Charger No-Break 55.2V 500W with special settings:||SR500HI48TFSL|
|SR500C48TFX||Sys No-Break DC UPS 48V 500W no switch panel/LEDS||SR500HI48TFXL|
|SR500C48TFXG||Sys No-Break 48Vdc 500W 110VAC input no switch panel/LEDs||It will be given a custom model number using the SR500HI|
|SR500C48TFXL||Sys No-Break DC UPS 48V 500W||SR500HI48TFXL|
|SR500C48TFXU||System No-Break 110VAC 48V 500W||It will be given a custom model number using the SR500HI|
|SR500C12TFSL||System No-Break DC UPS 13.8V 500W||SR500HI12TFSL|
|SR500I12TFSL-LAN+||Charger -DC UPS 13.8VDC 500W with ethernet/||SR500HI12TFSL-LAN+|
|SR500I12TFSL232||Sys No Break 12V 500W FAN RS232 Comms Interface||SR500HI12TFSL-232|
|SR500I12TFSL485||Sys No Break 12V 500W FAN RS485 Comms Interface||SR500HI12TFSL-485|
|SR500I24TFSL485||No-Break DC charger 24V 500W w/RS485 comms port||SR500HI24TFSL-485|
|SR500I24TFXL485||No-Break DC charger 24V 500W w/RS485||SR500HI24TFXL-485|
|SR500I24TSFL-LAN+||No-Break DC charger 24V 500W w ith ethernet/SNMP||SR500HI24TFSL-LAN+|
|SR500I36TFSL485||No-Break DC charger 36V 500W w/RS485 comms port||SR500HI36TFSL-LAN+|
|SR500I48TFSL-LAN+||Sys No-Break DC UPS 48V 500W with ethernet/SNMP||SR500HI48TFSL-LAN+|
|SR500I24TFXL-LAN+||No-Break DC charger 24V 500W w ith ethernet/SNMP||SR500HI24TFXL-LAN+|
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.
The No-Break ™ DC UPS has many features which a normal float charger does not, these including:
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
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.
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.
At approximately 1.67 volts per 2V (nominal) cell, so for a 12V system the disconnect voltage is set at 10V.
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!