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SECTION 10 | Programming of Operating Parameters
“Synchronizable Frequency Window” = Programmed value of “Output FREQ” of the Inverter (Section 10.2.3.2
above) +/- Programmed value of the “Sync FREQ”. For example, if the
“Output Frequency” of the Inverter Section is set at 60 Hz (Default)
and “Sync. FREQ” is set at 5 Hz (Default), the “Synchronizable
Frequency Window” will be 60Hz ± 5Hz or “55Hz to 65Hz”.
As long as the AC Grid frequency is within the “Synchronizable Frequency Window”, the frequency and phase
of the Inverter’s output voltage will be kept synchronized with the frequency and phase of the AC Grid.
See Section 5.6.4 for details
10.2.3.4 “d. Inverter Mode”: This parameter selects the primary and backup sources of power for powering
the AC loads as follows:
Off-Line Mode: In this mode, the AC GRID input is the primary source of power and the Inverter is the
backup source.
On- Line Mode: In this mode, the Inverter is the primary source of power and the AC GRID input is the
backup source of power.
Refer to Section 5.5 for details of On-Line and Off-Line modes of operation.
Parameter Programmable Range Default
d. Inverter Mode
Off-Line or,
On-Line
Off-Line
10.2.3.5 “e. Transfer Type”: The AC load can be transferred between the AC GRID and the Inverter based on 2
options - “Synchronized” or “Unsynchronized”.
Refer to Section 5.6 for details of operation under these 2 types of transfer.
Parameter Programmable Range Default
e. Transfer Type
Synch (Synchronized) or,
UnSynch (Unsynchronized)
Synch (Synchronized)
10.2.3.5 “f. OL Protect”: The Inverter will shut down if the AC load draws higher than the programmed % of
overload power for more than 2 to 3 sec.
Overload power can be programmed from 100% to 110% of the rated power through this parameter.
Refer to Section 11.4 for detailed information on overload protection.
Parameter Programmable Range Default
f. OL Protection 100% to 110% 110%