Specifications - Helios SR250C User Manual

♦ 24 Month Warranty

SPECIFICATIONS

All specifications are typical at nominal input, full load and at 20°C unless otherwise stated.
ELECTRICAL
Input voltage 180 - 264V, 50/60 Hz (standard)
or 88 - 132VAC (internal link selectable)
5A input fuse and varistor
Fusing / protection
Battery fuse plus ECB for battery circuit
Isolation 1KV DC input - output / earth
Efficiency > 85%
Soft start circuit
Inrush current
Output power 250W
Output voltage 13.8, 27.6, 34.5, 41.4, 55.2VDC
Voltage adj. range 85 - 105% of Vout
Temp. compensation Temperature sensor on 1.7m lead with adhe-
sive pad: -4mV / °C / cell ±10%
Current limit PSU: 100% rated current
Battery: 25-100% rated current (factory set)
Line regulation <0.2% over AC input range
Load regulation <0.4% open circuit to 100% load
Noise <1% output voltage
Drift 0.03% / °C
20 ms without battery (nominal - max. Vin)
Hold-up time
Turn on time < 1 sec
Thermal protection Yes, self-resetting
Overvoltage protection Over-voltage protection on output
at ~ 130% of nominal output voltage
EMI CISPR 22 / EN55022 class A
Safety IEC950 / EN60950 / AS/NZS3260
Designed to meet MIL-STD-810F Method
Vibration
514.5
Specifications are subject to change without notice. No liability accepted for errors or omissions.
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 ver-
sions
Batteries external to charger - order separately
No-Break™ FUNCTIONS AND ALARMS
Reverse polarity pro- Battery reverse connection will open internal
tection fuse (and produce alarm)
Battery monitoring Detects for presence of battery on start up,
then every 60 minutes when charge current <
200mA
Battery protection Electronic circuit breaker (ECB) operates
under the following conditions:
- low battery volts
•
•
- overload
•
- short circuit
Indication LEDs Green: Battery System OK, Power OK
Red:
Alarms
•
•
Alarm relay contacts C - NO - NC full changeover rated 1A /50V
DC, 32VAC
Standby mode Turns off DC output of PSU & allows load to
run off battery
Battery condition test Optional - if enabled, default setting =
(BCT) 20mins/28days). BCT can be started and
stopped by the user on SR250
provided to control an external test load.
ENVIRONMENTAL
Operating -20 to 50 °C ambient at full load
temperature De-rate linearly at >50 °C to zero @ 70 °C
Storage temperature -30 to 85 °C ambient
Humidity 0 - 95% relative humidity non-condensing
Cooling Natural convection except for 12V model (fan)
Protection IP20
incl. SR250
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
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)
i.
BCT relay
i
10