Filter
Top Products
INSTALLATION
10 ME00070B TMS7 SERIES
4.4 Ventilation
When installing TMS7 starters in an enclosure there must be
sufficient air flow through the enclosure to limit heat rise within
the enclosure. Temperature within the enclosure must be kept
at, or below, the TMS7 maximum ambient temperature rating.
If installing an TMS7 within a totally sealed enclosure a bypass
contactor must be employed to eliminate heat dissipation from
the soft starter during run.
Soft starters dissipate approximately 4.5 watts per amp. The
table below shows air flow requirements for selected motor
currents. If other heat sources are installed in an enclosure
along with the TMS7 an additional air flow allowance must be
made for these items. Note that heat generation from
semiconductor fuses, if used, can be eliminated by installing
these within the bypass loop.
Required Airflow
m
3
/min m
3
/hour
Motor
Amps
Heat
(watts)
5
o
C
Rise
10
o
C
Rise
5
o
C
Rise
10
o
C
Rise
10 45 0.5 0.2 30 15
20 90 0.9 0.5 54 27
30 135 1.4 0.7 84 42
40 180 1.8 0.9 108 54
50 225 2.3 1.1 138 69
75 338 3.4 1.7 204 102
100 450 4.5 2.3 270 135
125 563 5.6 2.8 336 168
150 675 6.8 3.4 408 204
175 788 7.9 3.9 474 237
200 900 9.0 4.5 540 270
250 1125 11.3 5.6 678 339
300 1350 13.5 6.8 810 405
350 1575 15.8 7.9 948 474
400 1800 18.0 9.0 1080 540
450 2025 20.3 10.1 1218 609
500 2250 22.5 11.3 1350 675
550 2475 24.8 12.4 1488 744
600 2700 27.0 13.5 1620 810