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INV 2500 SERIES MANUAL REV 1 1/13
SECTION 3
OPERATION
3.2
OPERATION
1
Connect the load to the inverter. If multiple loads are used it is good practice to switch all loads
off before switching on the inverter. This will prevent multiple in - rush currents from tripping
protective circuits in the inverter.
2.
Switch on the inverter. At this point, the sound of the cooling fans should be evident.
3.
If the inverter contains the alarm \ bypass option, the appropriate front panel LEDs
should be illuminated.
4.
To test the inverter, use a True RMS type meter to confirm the output voltage is as
specified.
5.
Units provided with the AI bypass option are AC preferred. This means that the incoming AC
line voltage will be routed to the inverter output terminals ( or outlets ) when ever it is present.
During this time the inverter is in a standby condition. If the AC input is removed the output
terminals will be switched to the inverter and operation from the DC source begins.
The AI bypass function can be verified by removing the AC line input. This will cause the AC
IN LED to turn off and the AC IN alarm contacts to change state. During this time the
INVERTER and DC IN LEDs should remain on. Confirm an AC output from the output
terminal or outlet.
Units provided with the DI bypass option are DC preferred. This means that the inverter is
routed to the output terminals ( or outlets ) whenever DC is available. If the DC is lost or the
inverter malfunctions, the incoming AC line will be routed to the output terminals.
The DI bypass function can be verified by removing the DC input (leave front panel breaker
on ). Confirm that the DC IN and INVERTER LEDs turn off and the corresponding rear panel
alarm contacts change state. The AC IN LED will remain on and the AC IN contacts do not
change state . Use a voltmeter to confirm that the input AC is routed to the unit’s output
terminals or outlets.
3.3
OPERATIONAL CONSIDERATIONS
LOADING LIMITATIONS:
The INV series are designed to produce a power level of 2500 Watts( real power) under continuous
operating conditions. In addition, they can supply bursts of over 1500 watts for several seconds. Peak
repetitive currents on the order of 50 amps may also be supplied continuously as long as they do not
exceed the RMS value of 25 amps.
This high peak current capability allows the INV 2500 series to start most high in - rush loads in it’s
power range. It must be understood that the DC power source suppling the inverter must also have
this capability in order to derive these benefits. A poorly regulated or high internal resistance DC power
source will adversely affect operation of the inverter.
POWERING REACTIVE LOADS
Capacitors and inductors are reactive in nature. With capacitors, if the load is applied during the peak
of the AC cycle there may be a considerable in rush of current several magnitudes larger than the
steady state current. This current is only limited by any series resistance that may be present in the
load circuit. Under the right conditions, this could trip the overload protection circuits in the inverter.
Certain transformers and solenoids (inductance) present the same problem due to magnetizing
currents.
