13 • Installation
________________________________________________________________________________________________
Area (m
2
) =
Note
: For harsh environments (sewage treatment plants, etc.), it is recommended to order the starter with
printed circuit board coating. Refer to section
3.7.1 on page 8 for ordering information.
6.3
Temperature range & heat dissipation
The starter is rated to operate over a temperature range of -10ºC (14ºF) to + 40ºC (104ºF).
Relative non-condensed humidity inside the enclosure should not exceed 95%.
ATTENTION!
Operating at surrounding air temp. (Inside the cabinet) higher than 40ºC may
cause damage to the starter.
Starter’s heat dissipation while motor is running and the internal bypass relays are closed is typically less than
0.3 x In (in watts). During soft start and soft stop, heating is approximately two times the actual starting current
(In watts).
Example: For a 100A motor, heat dissipation is less than 30 watts while running and during starting (for
example at 350A), heat dissipation is approximately 700 watts.
Important note
: If motor is frequently started, cabinet should be designed for the higher heat dissipation.
Internal enclosure heating can be reduced through the use of additional ventilation.
6.3.1
Calculating the enclosure size, for non-ventilated metallic enclosure
Where:
Area [m
2]
]
- Surface area that can dissipate heat (front, sides, top).
Total heat dissipation [Watt]
– The total heat dissipation of the starter and other control devices in
the enclosure. If starter is frequently started, average power should be used.
6.3.2
Additional Ventilation
Use the following arrangement for forced ventilation of the Solstart Plus’s enclosure:
0.12 x Total heat dissipation [Watts]
60 – External ambient temp. [ºC]
Air Outlet
Air
Inlet
Fan
Solstart Plus
