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9.5 NO LOAD DRAW (IDLE CURRENT)
When the ON/OFF Switch (1, Fig 6.1 for PST-1500-48 and 1 in Fig 2 for PST-600-48) is
turned ON, all the circuitry inside the inverter becomes alive and the AC output is made
available. In this condition, even when no load is being supplied (or, if a load is con-
nected but has been switched OFF), the inverter draws a small amount of current from
the batteries to keep the circuitry alive and ready to deliver the required power on
demand. This is called the "Idle Current" or the "No Load Draw". Hence, when the load
is not required to be operated, turn OFF the ON/OFF switch (1, Fig 6.1 for PST-1500-48
and 1 in Fig 2 for PST-600-48) on the inverter to prevent unnecessary current drain from
the battery.
i
INFO
When the inverter is turned OFF using the optional Remote Control RC-300 (for
PST-1500-48) or RC-15A (for PST-600-48), some control circuitry in the inverter is
still alive and will draw very low current. Therefore, to prevent any drain from
the battery, switch OFF the inverter from the ON/OFF switch (1, Fig 6.1 for PST-
1500-48 and 1 in Fig 2 for PST-600-48) provided on the front panel of the inverter.
SECTION 10 |
Protections
10. PROTECTIONS
The inverters have been provided with protections detailed below:
10.1 POWER SURGE / OVERLOAD / SHORT CIRCUIT SHUT DOWN
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INFO
Please refer to definitions of Active Power (Watts), Apparent Power (VA) and
Power Factor (PF) at Section 2.1. In the explanation below, the values of Power
are expressed in Apparent Power in VA. Corresponding Active Power (Watts, W)
will depend upon the type of load (Resistive or Reactive) and its Power Factor
(Power Factor may range from 1 to 0.5). Please note the following:
• Active Power (Watts) = Apparent Power (VA) x Power Factor (PF).
• For resistive type of loads, the Power Factor = 1 and hence, Apparent Power
(VA) = Active Power (Watts, W)
• For reactive types of loads, the Power Factor will be < 1 (up to 0.5) and hence,
the Active Power (Watts, W) will be less than the Apparent Power (VA)
The AC output voltage will shut down due to overload and short circuit conditions as follows:
SECTION 9 |
Operation
Summary of Contents for PST-600-48
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