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SECTION 5 |
5.1 GENERAL DESCRIPTION
This unit is a 1200W, 100-120VAC, 50/60Hz Pure Sine Wave Inverter with Transfer Relay and functions as
a Backup AC Power Source. Layout of the unit is shown in Figs 6.1 and 6.2. The input side of the unit is
connected to 2 power sources: (i) DC power from 24/48VDC battery system and (ii) AC power from 100-
120VAC, 50/60 Hz Grid / Generator. It can operate in 2 modes: (i) Off-Line Mode: Grid / Generator is the
primary source of AC power and the Inverter is standby and (ii) On-Line Mode: The DC-AC Inverter is the
primary source of AC power and the Grid / Generator is standby.
NOTE: There is no battery charger built into the unit and hence, the batteries feeding the Inverter will be
required to be charged through an external battery charger.
Features:
• Micro-controller based, high efficiency, high frequency type Pure Sine Wave Inverter (THD < 2%)
with Transfer Switch – ensures highly reliable backup AC power in Off-Line / On-line Modes.
• Backup Inverter has adjustable operating voltage (100-120VAC) and frequency (50/60Hz) to meet
country specific requirements
• Option to select Synchronized (Default) / Unsynchronized Transfer. In "Synchronized Transfer"
option, the output voltage of the Inverter is kept synchronized in frequency and in phase with the
AC input voltage from the Grid / Generator (limited to programmable frequency deviation of up to
7 Hz). This allows safer transfer with faster transfer time of < 8ms.
NOTE: When using Generator or other AC source that have poor frequency stability (frequency
deviation of >7 Hz), the Inverter will not be able to synchronize with these input sources and
hence, bypass will not be allowed. Unsynchronized Transfer option may be used in this case.
• Space saving 1U height design for 19" Rack Mount Installation
• Operating parameters and modes can be adjusted/ configured and monitored locally or remotely as
follows to suit specific application:
§ Local parameter set up and monitoring through LCD Screen / LEDs
§ Remote parameter setup and monitoring through computer terminal using ASCII Coded
commands and USB / RS232 Serial Communication
§ Remote monitoring through computer terminal's Web Browser and Ethernet connection. Further,
alarms and faults due to abnormal operating conditions can be notified by e-mail.
§ Remote monitoring through Ethernet / SNMP (Simple Network Management Protocol) Trap messaging
• Wired, remote On/Off control using voltage signal or contact closure
• Wired signaling of alarms / faults through relay contact switching
• Temperature / load controlled cooling fans reduce no load / low load power consumption
• Output Neutral is bonded to the Chassis Ground in Inverter Mode and isolated in AC Grid Bypass
Mode. This arrangement meets NEC requirements on grounding
• Safety Listing: ETL listed to UL Standard 62368-1 and CSA Standard C22.2 No. 62368-1
• EMI/EMC Compliance: FCC Part 15(B), Class B
14 | SAMLEX AMERICA INC.
Description & Principles of Operation
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