System information
GRAVITAS SABRE SERIES
INSTALLATION &OPERATING MANUAL
Manual No. SABRE-4 Page 4 11/27/07 sabre-man
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The UNIPOWER Telecom SABRE Series Inverter System utilizes Digital Signal Processing controlled, 1000/1500VA,
modular inverters, contained in a 19/23inch shelf, to supply 120/230VAC to telecom equipments when 48VDC
(nominal) is supplied.
The controller, allows the user to monitor real-time system status such as output voltage, output current, alarm status,
and also allows system parameter settings to quickly be changed with the touch of a few keys.
The STS (Static Transfer Switch) increases system reliability by automatically switching between the inverter output
and the AC utility supply, providing protection against interruptions caused by system failure. The STS can be
programmed to provide the Utility supply to the load under normal conditions and switch to the inverters as a back-up
in the event of utility failure; or alternatively the inverters can be the normal source of power to the load, using the
Utility as a backup. This programmability of primary and backup source allows the SABRE system to be used in
many different applications including traditional Telecom and ‘Green Energy’ such as solar or wind generation.
The MBS (Maintenance Bypass Switch) consists of a mechanical switch providing free maintenance for the safe
removal of the STS module without interruption of power to the load. The inverter modules are fully hot-swappable
and operate automatically in an N+1 redundant configuration.
The SABRE Series Inverter System can accommodate up to 12 inverter modules for an output capacity up to 50Amps
when employing the STS while an output capacity of 100A is possible without the STS. Up to 12 shelves can be
connected in parallel to supply AC power. The system can be installed in both 19-inch and 23-inch cabinet
configurations.
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1.1.1 Electrical Specification
Input
Item Specification Remarks
Nominal voltage 48Vdc
Operating range 40.5Vdc ~ 58.0Vdc
Under voltage warning threshold 45Vdc
Under voltage threshold 40Vdc
Over voltage warning threshold 58.0Vdc
Over voltage threshold 60Vdc
Isolation AC-DC Reinforced isolation (Pri-Sec) 4242Vdc/1min
Inrush current <2*Irated IEC62040-3(1999)
Isolation DC-enclosure 707Vdc/1min (Varistors and filter capacitor
removed)
Input protection Reverse Polarity Protection
Psophometric noise voltage 1.0mV ITU-T O.41 (16.66~6000Hz)
Reflected Psophometric noise current According to YD /T 777-2006 less than 1%
Reflected relative band wide current
noise
According to YD/T 777~2006 less than
10%(0-2Mhz)
Wide Band Noise <1.0mVpsof (25Hz~5KHz)
<20mVrms (25Hz~20KHz)
Peak to peak noise 150mV up to 100MHz