Samlex America PST-200S-24E - Manual (Page 11)

10 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 11
tABLe 2.1: inVeRteR SiZinG FActoR
type of Device or Appliance
inverter
Sizing Factor*
Laser Printer / other Devices using Quartz Lamps for heating 4
Switch Mode Power Supplies (SMPS): no Power factor correction 3
Photographic Strobe / flash Lights 4 (Note 1)
* Multiply the Running Active Power Rating {Watts} of the appliance by this Factor to arrive at
the Continuous Power Rating of the inverter for powering this appliance.
tABLe 2.1: noteS
1. for photographic strobe / flash unit, the surge power of the inverter should be > 4
times the Watt Sec rating of photographic strobe / flash unit.
seCtIOn 2 | General Information
seCtIOn 3 | limiting electro-Magnetic
Interference (eMI)
These inverters contain internal switching devices that generate conducted and radiated
electromagnetic interference (EMI). The EMI is unintentional and cannot be entirely
eliminated. The magnitude of EMI is, however, limited by circuit design to acceptable
levels as per limits laid down in European Standard EN55022: Class B and EN55024.
These limits are designed to provide reasonable protection against harmful interfer-
ence when the equipment is operated in a residential environment. These inverters can
conduct and radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio communications.
The effects of EMI will also depend upon a number of factors external to the inverter
like proximity of the inverter to the EMI receptors, types and quality of connecting wires
and cables etc. EMI due to factors external to the inverter may be reduced as follows:
i
inFo
- Ensure that the inverter is firmly grounded to the ground system
of the building or the vehicle
- Locate the inverter as far away from the EMI receptors like radio, audio
and video devices as possible
- Keep the DC side cables between the battery and the inverter
as short as possible.
- Twist the DC side cables. This will partially cancel out the radiated noise
from the cables
- Shield the DC side cables with metal sheathing / copper foil / braiding:
- Use coaxial shielded cable for all antenna inputs (instead of 300 ohm twin leads)
- Use high quality shielded cables to attach audio and video devices to one another
- Limit operation of other high power loads when operating audio /
video equipment