Owner`s manual

1.3.4 Power Factor
Rated kVA is available over a power factor range of 0.6 lagging to 0.6 leading at nominal voltage. Watt rating should
not be exceeded.
1.3.5 Total Harmonic Distortion
Less than 1% for linear load conditions, 3% maximum for crest factor loads up to 3:1.
1.3.6 Line Regulation
System output voltage variation, less than 1% over the DC voltage range.
1.3.7 Load Regulation
System output voltage variation, less than 1% from zero to full load at nominal DC input.
1.3.8 Output Frequency
User-selectable, 50Hz or 60Hz. Free run frequency stability shall be within +/-0.02% of the selected frequency.
1.3.9 Short Circuit Current (SCC)
300% minimum of rated load current for four cycles. A SCC is defined as a current that exceeds 150% of rated
current.
1.3.10 Overload Capability
Continuous overload up to 108% of rated VA/watts at 40°C maximum.
1.3.11 Transient Deviation and Recovery
Within 20% of average value for any change in output current or step change in input voltage within specified limits.
Recovery within 1millisecond from zero to full load
1.3.12 EMI Emission
Less than 30dBrnc.
1.4 Indicators and Controls
See Figure 2-2 on page 2—4 for the location of indicators and control switches.
There are six LED indicators divided into three groups – DS1 and DS2, DS3 and DS4, DS5 and DS6 - on the
“Display” front panel. DS1 and DS2 are indicators of controller A; DS3 and DS4 are indicators for controller B; DS5
and DS6 are for output capacitors’ fuse indicators. Failure of output capacitors will trip output fuses, and will activate
DS5 and/or DS6 indicators
At power-up, one of the two controller units will be up quicker than the other and will take control the system.
Consequently either DS1 (if controller A is in charge) or DS3 (if controller B is in charge) will be on blinking green,
signaling that the system output is ready to be turned on.
The inverter output voltage is turned ON and/or to Stand-by via switch SW1 located on the left side of the LCD
“Display” Panel. Pushing it up is to turn the inverter ON, and pushing it down is to turn the inverter OFF. WARNING:
In the “Stand-by” position, if AC power is applied to the AC input terminal block, AC power will be on the output of
the unit. When the output voltage is on, DS2 (or DS3) indicator will be on green steadily, signaling that every thing
is normal.
3.5 to 21 kVA N+1 Inverter
Introductionpage 1 — 4