Helios Power Solutions - Auckland: +64 9 8350700 - Sydney: +61 2 9809 5022 - Singapore: +65 6871 4140 - www.heliosps.com
SR500C / SR750C (with
optional V/I meter shown)
SR250C
User Manual
SR250C/SR500C/SR750C
No-BreakTM DC UPS
15/09/2016
REFER TO BACK PAGE FOR CUSTOMISED MODELS
Specifications are subject to change without notice. No liability accepted for errors or omissions. 2
Safety
The user is responsible for ensuring that input and output wiring segregation complies with local standards and that in
the use of the equipment, access is confined to operators and service personnel. A low resistance earth connection is
essential to ensure safety and additionally, satisfactory EMI suppression (see below).
HAZARDOUS VOLTAGES EXIST WITHIN A POWER SUPPLY ENCLOSURE AND ANY REPAIRS MUST
BE CARRIED OUT BY A QUALIFIED SERVICEPERSON.
Electrical Strength Tests
Components within the power supply responsible for providing the safety barrier between input and output are constructed to provide electrical isolation as required by the relevant standard. However EMI filtering components could be damaged as result of excessively long high voltage tests between input, output and ground. Please contact our technicians
for advice regarding electric strength tests.
Earth Leakage
Where fitted, EMI suppression circuits cause earth leakage currents which may be to a maximum of 3.5mA.
Ventilation
High operating temperature is a major cause of power supply failures, for example, a 10oC rise in the operating temperature of a component will halve its expected life. Therefore always ensure that there is adequate ventilation for the
equipment. Batteries in particular suffer shortened lifetimes if subjected to high ambient temperatures.
Water / Dust
Every effort must be made in the installation to minimise the risk of ingress of water or dust. Water will almost always
cause instant failure. The effects of dust are slower in causing failure of electronic equipment but all electrical equipment should be cleaned free of any dust accumulation at regular intervals.
Electromagnetic Interference (EMI)
Switching power supplies and converters inherently generate electrical noise. All wiring should be as short as practicable and segregated from all equipment wiring which is sensitive to EMI. Residual noise can be reduced by looping DC
wiring through ferrite cores (sleeves). These are most effective as close to the power supply as possible and as many
turns of the wire taken through the core (+ and - in the same direction) as the core will accommodate.
External fuse protection
Fuses or circuit breakers must be used in all battery circuits to protect against short circuits. External fuses should be
used for power supplies/ chargers even though they are usually internally protected.
Connection polarity
It is critical to check the polarity carefully when connecting DC devices even with models which have non-destructive
reverse polarity protection.
PSU = pow er supp ly unit BCT = bat tery con ditio n test ECB = electroni c circuit b reaker
ELVD = elect ronic low voltage discon-
nect
RPP = rev er se polarity prot ection EMI = electromagnetic interferen ce
Glossary of terms used in our user manuals
SNMP = Simple Network Management
Protocol
LAN = local area network DOD = dep th of discharge
Specifications are subject to change without notice. No liability accepted for errors or omissions. 3
No-Break™ SYSTEM BLOCK DIAGRAM
The No-Break™ DC power su pply is designed to provide DC power and charge lead acid batteries for
critical back up applications.
No-Break™ DC systems ensure maximum uptime of the sy stem, and life of the batt ery, by providing:
♦ Accurately regulated output voltage
♦ Constant current limited output
♦ Monitoring of the battery status and battery circuit integrity
♦ Fast electronic battery overcurrent protection
♦ Deep discharge protection by disconnecting the load at low battery voltage.
♦ Temperature compensated output voltage using external temperature sensor
♦ Alarm contacts for fault monitoring
♦ Adjustable battery charge current limit
♦ Battery condition testing (BCT) - optional on “C” models, standard on “I” models which have a com-
munication interface
Optional features:
♦ Communication interfaces, serial (RS232, RS485) or ethernet to enable remote monitoring of the
power supply and control of the battery condition test function
♦ Modbus and SNMP protocols
♦ Internal V/I meters on 500W and 750W
MAINS FAIL
ALARM
Specifications are subject to change without notice. No liability accepted for errors or omissions. 4
#1. 1 x No-Break™DC charger and 1 x battery bank
This is the basic connection which is most commonly used, and provides
adequate protection for the majority of systems requiring DC back up in
the event of a mains power failure.
Power OK
YES
Battery Missing
YES
Battery Low
YES
Battery Condition Test Fail
YES
Alarms Available
Single battery DC
UPS
#3. 1+1 redundancy using two No-Break™DC
chargers and two battery banks
Power OK
YES
Battery Missing
YES
Battery Low
YES
Battery Condition Test Fail
YES
Alarms Available
#2. Peak load connection using 1 x No-Break™DC
charger
Use this connection when there is a connected load with a peak current
likely to exceed 1.5 times the rated current of the charger. Standing
loads are connected normally and an optional external low voltage disconnect may be used for the peak load.
Power OK
YES
Battery Missing
YES
Battery Low
YES
Battery Condition Test Fail
YES
Alarms Available
Power OK
YES
Battery missing
YES
Battery low
YES
Battery condition test fail
YES
Alarms available
#4 1+1 redundancy for systems with high peak loads
For super critical applications
DC UPS for high peak
loads
Specifications are subject to change without notice. No liability accepted for errors or omissions. 5
CONNECTION PROCEDURE
1 Check input and output voltages of system, ensure that they match the equipment.
2 Connect battery /batteries to BATTERY + and BATTERY - terminals. Although there is built in reverse
polarity protection, under some circumstances reverse polarity connection will not only result in the
rupture of the internal battery protection fuse but destroy the input circuitry of the unit.
3 The ECB and battery circuit may be tested at this point. To close the ECB with no mains power pre-
sent, briefly short together the BATTERY –ve and LOAD –ve termi nals. The battery voltage will
then appear at the load terminals, BATT LOW relay energises & BATT SYSTEM OK LED turns on. The
POWER OK LED stays on for about 30s. Disconnect one battery lead briefly to open the ECB.
4 Connect load/s to LOAD+ and LOAD- terminals.
5 To minimize the volt drop at the output connections always use all the terminals provided by linking
them together.
6 Place temperature sensor probe near or on batteries.
7 Connect input power. Charger should be fully operational at this stage.
ALARM & BCT RELAYS
Relay contacts shown in de-energised state (ie. when there is a fault condi tion).
Alarm relays are energised when power supply is operating normally. BCT relay is energised when battery
condition test is in progress.
OUTPUT FUSES/ MCB RATING
The battery circuit is the one which has the highest fault current potential and fuses/MCBs should be correctly
rated for the wiring used.
FRONT PANEL LEDS (w ith built-in switches)
BATTERY SYSTEM OK: LED on: Battery present and above V batl.
Note: If the battery condition test funct ion is enabled, pushing thi s switch
for approx. 2 sec will manually initiate a battery condition test.
POWER OK: LED on: Input power present
LED off: No input power or charger in standby mode
STANDBY: LED on: Charger in standby mode (no output from charger)
Note: Push standby button to turn off charger, this allows lo ad to run off bat
tery. Push button again to turn on charger.
AUX
(BCT)
MAINS FAIL
(POWER OK)
BATTERY LOW
(BATT SYS OK)
COM NC NO COM NC NO COM NC NO
FG
ALARMS (refer to specific data sheets for operational details)
POWER OK: Approx. 30 second delay before activation.
BATTSYS OK: Battery detection alarm my take up to 60 minutes to activate during normal operation
Specifications are subject to change without notice. No liability accepted for errors or omissions. 6
*1 This alarm operates only when no input voltage present.
Parameter
Default Settings Special
Setting
V nominal 12 24 30 36 48
V output (20°C)
13.8 27.6 34.5 41.4 55.2
BatDetect (mins)
60 60 60 60 60
Vpres
12.2 24.4 30.5 36.6 48.8
Vbatl *
1
11 22 27.5 33 44
Vshutd:
11.5 23 28.7 34.5 46
Vdisco:
10 20 25 30 40
Bccl (%)
100 100 100 100 100
Comms
M M M M M
BCTim (mins)
20 20 20 20 20
Time between BCT (days)
28 28 28 28 28
CC Mins:
40 40 40 40 40
CC Hrs:
23 23 23 23 23
CC Days:
27 27 27 27 27
MfiBCT:
30 30 30 30 30
Allow retest after BCT fail
Yes Yes Yes Yes Yes
T mf (hours)
4 4 4 4 4
T mfb (mins)
5 5 5 5 5
Scheduled BCT
Optional (no unless specified)
SNMP VERSIONS ONLY:
Alarm mask
Refer to SNMP user manual
DHCP
Disabled, IP address = 192.168.2.10
Explanation of Terms:
BatDetect:
Time between battery detections
Vpres:
Voltage threshold for battery detection and BCT. Note that if the voltage drops to
this level during a BCT the test is aborted and the BAT LOW/SYS alarm shows.
Vshutd:
Internal voltage level of the power supply during battery detection and battery
condition tests.
Vbatl: BAT LOW al arm vol tage level
Vdisco:
Voltage at which the load is disconnected from the battery during mains fail
Bccl:
Battery charge current limit as percentage of the rated power supply current
Comms (only on
-i versions)
Communication mode of PSU: F = continuous data stream of status
M = responds only to request made by a controller
BCTim:
Length of battery condition test
CC Mins:
Time in minutes between automatically scheduled BCTs
CC Hrs:
Time in hours between automatically scheduled BCTs
CC Days:
Time in days between automatically scheduled BCTs
Note: The total time i nterv al between battery condition tests (BCTs) is the sum total of the three 'CC'
MFiBCT:
Time in minutes before the mains fail check during the BCT (SR100 only)
T mf
Max. time of a mains fail without resetting to full BCT interval
T mfb
Max. time of mains fail before BCT is discontinued
Specifications are subject to change without notice. No liability accepted for errors or omissions. 7
Battery condition test (BCT)
An internal jumper must be fitted to enable the automatic battery condition test function. If this jumper is
fitted the battery condition test function may also be initiated manually by pushing the BATT SYS OK button for approx. 2 seconds.
Battery Condition Test Fail Reset
If the system fails the BCT the BATT SYS OK LED continues flashing and the BATT LOW alarm latches
until either both the mains power input and the battery are disconnected briefly, or the system passes
the next BCT.
Battery
System OK
LED
Power OK
LED
Power
Stand-by
LED
Battery
System
OK Alarm
Power OK
Alarm
Condition
Normal Normal System Normal: Input power on, battery circuit is OK
Normal Normal Battery detection in progress
Alarm Normal
Input power on, battery system fault:
1. Internal battery fuse has opened or
2. Battery circuit wiring open circuit, battery missing, ECB has tripped
Normal Alarm Input power off, battery system is OK (battery volts > Vbatl)
Alarm Alarm
Input power off and battery has discharged to < V batl
Alarm Alarm
Input power off, ELVD has activated and disconnected battery from load.
Normal Normal PSU in standby, input power on, battery system OK
Alarm Alarm
PSU is in standby and battery has discharged to < Battery Low, unit will continue
delivering battery current until next level initiates ELVD.
Alarm Alarm
PSU is in standby and ELVD has activated and disconnected battery from load.
Normal Normal
BCT in progress
Alarm Normal
Input power on, BCT failed (battery voltage < Vpres during BCT)
LEGEND :
=Off =fast flash
=On
=slow flash
LED FLASH CODES
Specifications are subject to change without notice. No liability accepted for errors or omissions. 8
SR250 CONNECTION LAYOUT
(Plug in/screw terminals)
AC INPUT
+ - + -
LOAD BATT
ALARMS
AC INPUT
ALARMS
SR250 CONNECTION LAYOUT
(Stud terminals)
+ COM LOAD- BA TT-
AC INPUT
ALARMS
SR500/750 CONNECTION LAYOUT
Stud terminals)
+ COM LOAD- BATT-
NOTE: LOAD+ / BATT+ t ermi nals
are linked internally and are connected to the +COM terminal on the stud
connection versions.
OPERATION OF ELECTRONIC CIRCUIT BREAKER (ECB) FOR PROTECTION OF CHARGER & BATTERY WIRING
The ECB will operate on overcurrent as above & is also activated for the low voltage disconnect function on
mains fail (no input power). It will reset when input power is restored, or can be manually reset by briefly
shorting the BAT- and LOAD- terminals together when there is no in put power.
Max. allowable
load amps
(x I rated)
8
7
2.5
2ms 300ms
Time
8
6
2ms 300ms
Time
6x I
rated
for 300ms max.
INPUT POWER ON
ECB automatically resets
I
PSU
= 1x I
rated
I
BAT
= 1.5x I
rated
ECB trips & latches off
until input power is
restored
I
PSU
= 0
I
BAT
= 1.5x I
rated
7x I
rated
for
300ms max.
Short circuit condition,
ECB trips within 2ms
INPUT POWER OFF
1.5 x I
rated
until LV
disconnect operates
Short circuit condition,
ECB trips within 2ms
Max. allowable
load amps
(x I rated)
1.5
CONNECTION LAYOUTS
2.5 x I
rated
peak
current allowed
Specifications are subject to change without notice. No liability accepted for errors or omissions. 9
This page is intentionally blank
Specifications are subject to change without notice. No liability accepted for errors or omissions. 10
High performance DC UPS system
No-Break switching between charger & battery
Battery detection - regular battery presence and
battery circuit integrity checks
Alarm relay outputs
LED flash codes for precise state indication
Deep discharge protection for batteries
ECB for battery overload & short circuit protection
Fused reverse battery polarity protection
Automatic temperature compensated output volts
Option - battery condition test (BCT)
Option - communication interface allows remote
monitoring & user control of BCT function - i versions
Batteries external to charger - order separately
ENVIRONMENTAL
Operating
temperature
Storage temperature
Humidity
Cooling
Protection
♦ 24 Month Warranty
Input voltage
Fusing / protection
Isolation
Efficiency
Inrush current
Output power
Output voltage
Voltage adj. range
Temp. compensation
Current limit
Line regulation
Load regulation
Noise
Drift
Hold-up time
Turn on time
Thermal protection
Overvoltage protection
EMI
Safety
Vibration
ELECTRICAL
180 - 264V, 50/60 Hz (standard)
or 88 - 132VAC (internal link selectable)
5A input fuse and varistor
Battery fuse plus ECB for battery circuit
1KV DC input - output / earth
> 85%
Soft start circuit
250W
13.8, 27.6, 34.5, 41.4, 55.2VDC
85 - 105% of Vout
Temperature sensor on 1.7m lead with adhesive pad: -4mV / °C / cell ±10%
PSU: 100% rated cu rrent
Battery: 25-100% rated current (factory set)
<0.2% over AC input range
<0.4% open circuit to 100% load
<1% output voltage
0.03% / °C
20 ms without battery (nominal - max. Vin)
< 1 sec
Yes, self-resetting
Over-voltage protection on output
at ~ 130% of nominal output voltage
CISPR 22 / EN55022 class A
IEC950 / EN60950 / AS/NZS3260
Designed to meet MIL-STD-810F Method
514.5
-20 to 50 °C ambient at full load
De-rate linearly at >50 °C to zero @ 70 °C
-30 to 85 °C ambient
0 - 95% relative humidity non-condensing
Natural convection except for 12V model (fan)
IP20
No-Break™ FUNCTIONS AND ALA RMS
Reverse polarity protection
Battery monitoring
Battery protection
- low battery volts
- overload
- short circuit
Indication LEDs
Alarms
Alarm relay contacts
Standby mode
Battery condition test
(BCT)
Battery reverse connection will open internal
fuse (and produce alarm)
Detects for presence of battery on start up,
then every 60 minutes when charge current <
200mA
Electronic circuit breaker (ECB) operates
under the following conditions:
• battery voltage drops to 1.67V/cell -
auto reset
• < 300ms for load > 6 x rated PSU cur-
rent, allows ~1.5x rated PSU current
from battery without acting,
• < 2ms, backed up by fuse
Green: Batt ery Sys tem OK, Power OK
Red: Standby
• Power OK (alarm on mains fail)
• Battery System OK - alarms when battery
voltage low (on mains fail) , battery
missing, battery circuit wiring faulty, BCT
fail (if enabled)
C - NO - NC full changeover rated 1A /50V
DC, 32VAC
Turns off DC output of PSU & allows load to
run off battery
Optional - if enabled, default setting =
20mins/28days). BCT can be started and
stopped by the user on SR250 i. BCT relay
provided to control an external test load.
incl. SR250i
SPECIFICATIONS All specifications are typical at nominal input, full load and at 20°C unless otherwise stated.
Specifications are subject to change without notice. No liability accepted for errors or omissions. 11
PHYSICAL DETAILS
AC input connector
DC output connections
Alarm connections
Enclosure
Weight
Dimensions
IEC320 input socket (included)
M6 brass stud or plug-in style socket & mating
screw terminal block:
Plug in screw terminal block
Powder coated & zinc plated steel
1.7kg
150W x 242D x 61H mm (excluding mounting
feet and connections)
OPTIONS
Communications Port
(SR250i...)
Digital V/I meter
19”rack mount
Wall Mount Enclosure
• Ethernet / SNMP v1
• RS485 / Modbus using external converter:
∗ +PROTOCONMB - Modbus serial
∗ +PROTOCONMB-OE - Modbus TCP
& HTTP
• RS232 / IE ASCII code
May be fitted with SR250 in 19” rack,
add: SR-METER or SR-METERV2/SHUNT
Single charger add: SR-RM2U
Dual charger (front removable) add:
SR-RM2U-DUALV2
Charger may be fitted into enclosure with
MCBs and terminals. Code: SEC-SR
DC Output
Output (V)
PSU Rated
(A)
Charge
Limit (A) *
1
Recomm. Av.
Load (A)
Peak load on
mains fail (A)
SR250C12
13.8 18.0 18.0 12.0 27
SR250C24
27.6 9.0 9.0 5.0 13.5
SR250C30
34.5 7.2 7.2 3.7 10.8
SR250C36
41.4 6.0 6.0 3.0 9
SR250C48
55.2 4.5 4.5 2.0 6.7
MODELS
MODEL TABLE (ratings apply to all variants)
MODEL IDENTIFICATION CODES
SR250i (please refer to separate
data sheet on comms options)
250 Watt
No-Break™ DC charger for lead acid batteries
Optional Communications
Interface Port
incl. SR250i
L = 230V AC + sw itch Blank = 230V AC no switch
U = 110V AC + sw itch G = 110V AC no sw it ch
H = 110V DC + sw itc h J = 110V DC no sw it ch
M = 230V AC + s wit ch + (to be used with IEOVPHVAC)
Input voltage and front
Panel standby switch
C = No-Break™ DC PSU/char ger
i = C with serial or ethernet communications port
Function
Power
250W
For SR250i versions:
485 = RS485 232 = RS232 LAN = Et her net (A SCII)
LAN+ = Eth ernet (SNMP)
S = Stud X = Plug in /scr ew t erm inal bl oc k
F = Fan Blank = No fan
T = Yes Blank = No
12, 24, 30, 36, 48V
Output DC Connector type:
Fan cooled:
Temperature Compensation
DC output (nominal battery)
2 x SR250C/i chargers (front removable) in 2U rack
*1 This is the default setting. Please specify
if a lower limit is required at time of order
SCHEMATIC BLOCK DIAGRAM
Specifications are subject to change without notice. No liability accepted for errors or omissions. 12
High performance DC UPS system
No-Break switching between charger & battery
Battery detection - regular battery presence and
battery circuit integrity checks
Alarm relay outputs
LED flash codes for precise state indication
Deep discharge protection for batteries
ECB for battery overload & short circuit protection
Fused reverse battery polarity protection
Automatic temperature compensated output volts
Option - battery condition test (BCT)
Option - communication interface allows remote
monitoring & user control of BCT function - i versions
Batteries external to charger - order separately
ENVIRONMENTAL
Operating
temperature
Storage temperature
Humidity
Cooling
Protection
♦ 24 Month Warranty
Input voltage
Frequency
Fusing / protection
Isolation
Efficiency
Inrush current
Output power
Output voltage
Voltage adj. range
Temp. compensation
Current limits
Line regulation
Load regulation
Noise
Drift
Hold-up time
Turn on time
Thermal protection
OVP
EMI
Safety
Vibration
ELECTRICAL
230V AC: 180V - 264V (standard)
110V AC: 88V - 132V (on request)
50/60 Hz
Input fuse and varistor
Battery fuse plus ECB for battery circuit
1KV DC input - output / earth
> 85%
Soft start circuit
500W
13.8, 27.6, 34.5, 41.4, 55.2VDC
85 - 105% of Vout
Temperature sensor on 1.7m lead with adhesive pad: -4mV / °C / cell ±10%
PSU: 100% rated cu rrent
Battery: 25-100% rated current (factory set)
<0.2% over AC input range
<0.4% open circuit to 100% load
<1% output voltage
0.03% / °C
20 ms without battery (nominal - max. Vin)
< 2 sec
Yes, self resetting
Over-voltage protection on output
at ~ 130% of nominal output voltage
to CISPR 22 / EN55022 class A
to IEC950 / EN60950 / AS/NZS3260
Designed to meet MIL-STD-810F Method
514.5
0 to 50 °C ambient at full load
De-rate linearly at >50 °C to zero @ 70 °C
-10 to 85 °C ambient
0 - 95% relative humidity non-condensing
Fan cooled
IP20
No-Break™ FUNCTIONS AND ALA RMS
Reverse polarity protection
Battery monitoring
Battery protection
- low battery volts
- overload
- short circuit
Indication LEDs
Alarms
Alarm relay contacts
Standby mode
Battery condition test
(BCT)
Battery reverse connection will open internal
fuse (and produce alarm)
Detects for presence of battery on start up,
then every 60 minutes when charge current <
200mA
Electronic circuit breaker (ECB) operates
under the following conditions:
• battery voltage drops to 1.67V/cell -
auto reset
• < 300ms for load > 6 x rated PSU cur-
rent, allows ~1.5x rated PSU current
from battery without acting,
• < 2ms, backed up by fuse
Green: Batt ery Sys tem OK, Power OK
Red: Standby
• Power OK (mains or charger fail, standby
mode)
• Battery System OK - battery voltage low
(on mains fail) , battery missing, battery
circuit wiring faulty, BCT fail (if enabled)
C - NO - NC full changeover rated 1A /50V
DC, 32VAC
Turns off DC output of PSU & allows load to
run off battery
Optional - if enabled, default setting =
20mins/28days). BCT can be started and
stopped by the user on SR500 i. BCT relay
provided to control an external test load.
Optional internal V/I
meter shown
incl. SR500i
SPECIFICATIONS All specifications are typical at nominal input, full load and at 20°C unless otherwise stated.
Specifications are subject to change without notice. No liability accepted for errors or omissions. 13
PHYSICAL
AC Input connector
DC Output Connections
Alarm Connections
Enclosure
Weight
Dimensions
IEC320 inlet socket (similar to PCs etc.)
M8 brass stud or plug-in/ screw terminal block
Plug in/ screw terminal block
Powder coated steel
4.3kg
225W x 304D x 70H mm (excluding mounting
feet and terminals)
500 Watt
No-Break™ DC charger for lead acid batteries
SCHEMATIC BLOCK DIAGRAM
STANDARD MODEL TABLE
ACCESSORIES SUPPLIED
Mounting feet together with screws
AC power cord 1.5m with IEC320 socket & AUS/NZ plug
Mating screw terminal plug for ‘X’ version
Mating screw terminal plug for alarm outputs
Crimp lugs for ’S’ versions
OPTIONS
19”Rack Mount
Digital V/I meter
Wall Mount Enclosure
Parallel redundancy
Internal V/I Meter
Communications Port
(SR500i...)
MODEL IDENTIFICATION CODES
Temperature Probe
2U sub rack option: add SR-RM2U
May be fitted with SR500 in 19” rack,
add: SR-METER or SR-METERV2/SHUNT
Charger may be fitted into enclosure with
MCBs and terminals. Code: SEC-SR
Use external output diode, eg +P50
Add code +INT-METER
• Ethernet / SNMP v1
• RS485 / Modbus using external converter:
∗ +PROTOCONMB - Modbus serial
∗ +PROTOCONMB-OE - Modbus TCP
& HTTP
• RS232 / IE ASCII code
DC Output
Output (V)
PSU Rated
(A)
Charge
Limit (A) *
1
Recomm.
Load (A)
Peak load on
mains fail (A)
SR500C12
13.8 36 36 27 54
SR500C24
27.6 18 18 13 27
SR500C36
41.4 12 12 9 18
SR500C48
55.2 9 9 7 13.5
MODELS
SR500C30
34.5 14.5 14.5 10 21.5
*1 This is the default setting. Please specify
if a lower limit is required at time of order
LAN = ether net (ASCII) LAN+ = et hern et (SNMP) 232 = RS232 485 =
Input voltage and front
panel standby switch:
S = Stud X = Plug in /scr ew t erm inal
Output DC Connector type:
F = With f an
Cooling
T = Yes Blank = No
Temperature Compensation
12, 24, 30, 36, 48V
DC output (nominal battery)
C = No-Break™DC i = No-Break™DC with communication port
Function
Power
500W
Communication port
L = 230V AC + sw itch Blank = 230V AC no switch
U = 110V AC + sw itch G = 110V AC no sw it ch
H = 110V DC + sw itc h J = 110V DC no sw it ch
incl. SR500i
Specifications are subject to change without notice. No liability accepted for errors or omissions. 14
High performance DC UPS system
No-Break switching between charger & battery
Battery detection - regular battery presence and
battery circuit integrity checks
Alarm relay outputs
LED flash codes for precise state indication
Deep discharge protection for batteries
ECB for battery overload & short circuit protection
Fused reverse battery polarity protection
Automatic temperature compensated output volts
Option - battery condition test (BCT)
Option - communication interface allows remote
monitoring & user control of BCT function - i versions
Batteries external to charger - order separately
ENVIRONMENTAL
Operating
temperature
Storage temperature
Humidity
Cooling
Protection
♦ 24 Month Warranty
Input voltage
Frequency
Fusing / protection
Isolation
Efficiency
Inrush current
Output power
Output voltage
Voltage adj. range
Temp. compensation
Current limits
Line regulation
Load regulation
Noise
Drift
Hold-up time
Turn on time
Thermal protection
OVP
EMI
Safety
Vibration
ELECTRICAL
230V AC: 180V - 264V (standard)
110V AC: 88V - 132V (on request)
50/60 Hz
Input fuse and varistor
Battery fuse plus ECB for battery circuit
1KV DC input - output / earth
> 85%
Soft start circuit
750W
13.8, 27.6, 34.5, 41.4, 55.2VDC
85 - 105% of Vout
Temperature sensor on 1.7m lead with adhesive pad: -4mV / °C / cell ±10%
PSU: 100% rated cu rrent
Battery: 25-100% rated current (factory set)
<0.2% over AC input range
<0.4% open circuit to 100% load
<1% output voltage
0.03% / °C
20 ms without battery (nominal - max. Vin)
< 2 sec
Yes, self resetting
Over-voltage protection on output
at ~ 130% of nominal output voltage
to CISPR 22 / EN55022 class A
to IEC950 / EN60950 / AS/NZS3260
Designed to meet MIL-STD-810F Method
514.5
0 to 50 °C ambient at full load
De-rate linearly at >50 °C to zero @ 70 °C
-10 to 85 °C ambient
0 - 95% relative humidity non-condensing
Fan cooled
IP20
No-Break™ FUNCTIONS AND ALA RMS
Reverse polarity protection
Battery monitoring
Battery protection
- low battery volts
- overload
- short circuit
Indication LEDs
Alarms
Alarm relay contacts
Standby mode
Battery condition test
(BCT)
Battery reverse connection will open internal
fuse (and produce alarm)
Detects for presence of battery on start up,
then every 60 minutes when charge current <
200mA
Electronic circuit breaker (ECB) operates
under the following conditions:
• battery voltage drops to 1.67V/cell -
auto reset
• < 300ms for load > 6 x rated PSU cur-
rent, allows ~1.5x rated PSU current
from battery without acting,
• < 2ms, backed up by fuse
Green: Batt ery Sys tem OK, Power OK
Red: Standby
• Power OK (mains or charger fail, standby
mode)
• Battery System OK - battery voltage low
(on mains fail) , battery missing, battery
circuit wiring faulty, BCT fail (if enabled)
C - NO - NC full changeover rated 1A /50V
DC, 32VAC
Turns off DC output of PSU & allows load to
run off battery
Optional - if enabled, default setting =
20mins/28days). BCT can be started and
stopped by the user on SR750 i. BCT relay
provided to control an external test load.
Optional internal V/I
meter shown
incl. SR750i
SPECIFICATIONS All specifications are typical at nominal input, full load and at 20°C unless otherwise stated.
Specifications are subject to change without notice. No liability accepted for errors or omissions. 15
DC Output
Output (V)
PSU Rated
(A)
Charge
Limit (A) *
1
Recomm.
Load (A)
Peak load on
mains fail (A)
SR750C12
13.8 54 54 40 81
SR750C24
27.6 27 27 20 40
SR750C36
41.4 18 18 13 27
SR750C48
55.2 13.5 13.5 10 20
MODELS
SR750C30
34.5 21 21 15 31
STANDARD MODEL TABLE
PHYSICAL
AC Input connector
DC Output Connections
Alarm Connections
Enclosure
Weight
Dimensions
IEC320 inlet socket (similar to PCs etc.)
M8 brass stud or plug-in/ screw terminal block
Plug in/ screw terminal block
Powder coated steel
4.3kg
225W x 304D x 70H mm (excluding mounting
feet and terminals)
750 Watt
No-Break™ DC charger for lead acid batteries
SCHEMATIC BLOCK DIAGRAM
ACCESSORIES SUPPLIED
Mounting feet together with screws
AC power cord 1.5m with IEC320 socket & AUS/NZ plug
Mating screw terminal plug for ‘X’ version
Mating screw terminal plug for alarm outputs
Crimp lugs for ’S’ versions
OPTIONS
19”Rack Mount
Digital V/I meter
Wall Mount Enclosure
Parallel redundancy
Internal V/I Meter
Communications Port
(SR750i...)
MODEL IDENTIFICATION CODES
2U sub rack option: add SR-RM2U
May be fitted with SR750 in 19” rack,
add: SR-METER or SR-METERV2/SHUNT
Charger may be fitted into enclosure with
MCBs and terminals. Code: SEC-SR
Use external output diode, eg +P50
Add code +INT-METER
• Ethernet / SNMP v1
• RS485 / Modbus using external converter:
∗ +PROTOCONMB - Modbus serial
∗ +PROTOCONMB-OE - Modbus TCP
& HTTP
• RS232 / IE ASCII code
*1 This is the default setting. Please specify
if a lower limit is required at time of order
LAN = ether net (ASCII) LAN+ = et hern et (SNMP) 232 = RS232 485 =
Input voltage and front
panel standby switch:
S = Stud X = Plug in /scr ew t erm inal
Output DC Connector type:
F = With f an
Cooling
T = Yes Blank = No
Temperature Compensation
12, 24, 30, 36, 48V
DC output (nominal battery)
C = No-Break™DC i = No-Break™DC with communication port
Function
Power
750W
Communication port
L = 230V AC + sw itch Blank = 230V AC no switch
U = 110V AC + sw itch G = 110V AC no sw it ch
H = 110V DC + sw itc h J = 110V DC no sw it ch
incl. SR750i
Stud connectors
Screw/plug in
connectors
Helios Power Solutions - Auckland: +64 9 8350700 - Sydney: +61 2 9809 5022 - Singapore: +65 6871 4140 - www.heliosps.com
TERMS OF WARRANTY
Helios Power Solutions warrants this product for 24 months from date of shipment against material and workmanship
defects. Liability under this warranty is limited to the replacement or repair of the defective product as long as the product has not been damaged through misapplication, negligence, or unauthorized modification or repair.
CUSTOMISED VERSIONS
CSR code BASE MODEL SPECIAL FEATURES
CSR107 SR750C24TFSL Vout = 28Vdc, LVD = 24V, internal V/I meter
CSR108 SR250C24TSL BCT enabled, conformal coated
CSR122 SR250C12TFSL As specified by the customer.
Loading...