MAJORSINE Inverter Manual / M101.4
Page 11
3-2 Block Diagram
MAJORSINE Inverter Block Diagram
MAJORSINE inverters feature IGBT (Insulated Gate Bipolar
Transistor) technology, minimizing weight and dimension, while
enhancing output short circuit reliability and overload capacity.
Output voltage is provided in one of two ways:
1) From AC input bypass mode: (Off-Line Mode)
2) From DC to AC inverter mode: (On-Line Mode)
Either mode is front panel programmable; the selected operational
mode will predetermine the “default” output.
In the first option,
Off-Line mode
, AC output power will be
supplied through the AC bypass mode in its “normal” operation.
Upon AC input failure, output power will be diverted through the
DC to AC inverter mode. Once AC mains are restored, the unit will
revert from inverter mode to bypass mode.
In the second option,
On-Line mode
, AC output power will be
provided directly by the inverter from the VDC source. Should the
DC source or inverter fail, the system will transfer its output power
through the bypass mode. Once the DC power source is restored,
the system will revert to “inverter” mode.
Transfer time from inverter to bypass, or bypass to inverter is < 4
ms.
The Off-line/On-line mode is changed from one to the other by
pressing the ON button for less than 3 seconds when normal
output is available. The operational mode cannot be changed
during an abnormal or fault condition.
DC INPUT
DC
DC
DC
AC
AC
OUTPUT
DC to DC Converter
FILTER
OUTPUT RELAY
BREAKER
DC to AC Inverter
AC BYPASS
INPUT
FILTER
BYPASS RELAY
