Mitsubishi Electric MS-T Series - Page 7

5
For special environment
Special environment Problem points General measures
Name Type
Sudden temperature
changes
 Rusting or
malfunctioning due
to dew
condensation
(freezing)
 Install a space
heater to lower the
relative humidity.
 Move the product
to a place with little
temperature
change.
Low temperature
Freezer storage
Low temperature
room
 Freezing
 Malfunctioning or
rust due to dew
condensation.
 Install a space
heater, etc., to
increase the
temperature.
 Dry the area.
Consult
Mitsubishi when
the temperature
is –10C or less.
High temperature
Steel mill
Molding forming
plant
 Malfunctioning
 Heat resistance of
connected wires
 Overheating of
insulator
 Lower load
current.
 Use heat resistant
wires.
 Do not use in
places where the
temperature in the
panel exceeds
55C.
High humidity
Chemical plants
Pump room
 Drop in insulation
resistance
 Corrosion, rusting
 Place in a
waterproof type
box, etc.
 Inspect regulary.
 Corrosion-
proof
treatment
MSO-
YS
(supported by the
S-T type
magnetic
contactor as
standard.)
Corrosive gas, sodium
Petrol refining plant
Chemical plant
Coastline
City water pump
room (Chlorine
disinfectant)
 Corrosion, rusting  Place
anti-corrosive
product in
corrosion-proof
type box, etc.
 Corrosion-
proof
treatment
MSO-
YS
(supported by the
S-T type
magnetic
contactor as
standard.)
Use it in
corrosion-proof
box.
Dust, moisture
Cement plant
Textile plant
 Failure in contact
continuity
 Failure in
mechanism
operation
 Deterioration of
insulation
 Place in a dust-
proof box, etc.