Chapter 2: System Hardware
Table 101 ePMP MP 3000 startup times based on ambient temperature
Startup time (from power on to operational)
ePMP MP 3000 wind loading
Ensure that the device and the structure on which it is mounted are capable of withstanding the
prevalent wind speeds at a proposed ePMP site. Wind speed statistics are available from national
meteorological offices.
The device and its mounting bracket are capable of withstanding wind speeds of up to 180 kph
(124 mph).
Wind blowing on the device will subject the mounting structure to significant lateral force. The
magnitude of the force depends on both wind strength and the surface area of the device. Wind loading
is estimated using the following formulae:
Force (in kilograms) = 0.1045aV
2
the surface area in square meters
wind speed in meters per second
Force (in pounds) = 0.0042Av
2
the surface area in square feet
wind speed in miles per hour
Applying these formulae to the ePMP device at different wind speeds, the resulting wind loadings are
shown in Table 102 and Table 103.
Table 102 ePMP MP 3000 wind loading (Kg)
Largest
surface area (square meters)
Wind speed (meters per second)
Table 103 ePMP MP 3000 wind loading (lb)
Largest surface area (square feet)
Wind speed (miles per hour)