6 PSTX ENCLOSED SOFT STARTER
The environments for NEMA Type 4 enclosures shall
be indoors or outdoors to provide a degree of
protection to personnel against access to
hazardous parts; to provide a degree of protection
against ingress of solid foreign objects (falling dirt
and windblown dust); to provide a degree of
protection with respect to harmful effects on the
equipment due to the ingress of water (rain, sleet,
snow, splashing water and hose-directed water);
and that will be undamaged by the external
formation of ice on the enclosure.
Failure to comply with the following instruction
could result in a fire and/or explosion, resulting
in a fatal or serious injury.
For all enclosure types, the ambient temperature
must remain in the range of -10 °C to 40 °C (14 °F
to 104 °F). Never store or operate the panel below
or above the ambient range.
Use the formula below to derate panels for ambient
temperatures above 40 °C and altitude above 4000
meters.
When used at high altitudes, de-rate the rated
current using the following formula:
1000 m (3281 ft.) above sea level without derating.
1000–4000 m (3281–13,123 ft.) with derating
0.7%/100 m (0.22%/100 ft.)
Notice damage to equipment will result if panel
is operated or stored below or above stated
ambient temperature range.
All wall-mounted enclosures must be mounted
on a non-flammable or heat-resistant surface.
The temperature of the starter heat sink fins
may reach 90 °C (194 °F). Thus, if not mounted
on a heat-resistant or non-flammable surface,
a fire may occur, resulting in a fatal or serious
injury, as well as damage to equipment.
Do not mount the enclosure in direct sunlight.
This applies to ALL enclosure types.
Some PSTX soft starter panel configurations
require enclosure ventilation to keep the
components and starter unit within their thermal
recommendations. The enclosure door and sides
contain grilles at the bottom and top to allow for
air circulation through the enclosure. Ventilation
is accomplished by the cooling fan(s) mounted
at the bottom grille(s) pulling air into the enclosure
and forcing it out the top grille(s).
The air used for ventilating the enclosure must
be free from condensation, moisture, dirt, dust
and flammable or combustible vapors and/or dust.
The recirculation of air leaving the enclosure should
be avoided. Air forced out of the enclosure should
not be allowed to circulate back into the enclosure.
All enclosures should be installed where the doors
are able to open completely. Do not mount the
enclosure where air flow into or out of it may be
restricted.
Installation
Determine conduit entry and exit locations on the
enclosure before mounting. See the appropriate
outline drawing for recommended conduit
locations.
Allow for input and output power wiring to be
located in separate conduit.
No conduit holes are provided in the enclosure
except for knockouts in some enclosures;
therefore, the customer must install all conduit
holes. Place a protective covering over the
components of the panel while installing the
conduit holes to prevent metal shavings or chips
from landing on components or electronic boards.
Failure to cover components to protect them
from metal shavings may result in damage
to equipment.
For NEMA 12, 3R and 4 enclosure types, liquid-tight
conduit (UL listed rain-tight conduit hubs) and
fittings must be installed to maintain the enclosure
integrity.
02
To Next Page
Loading...
