CG emotron TSA Series, Instruction Manual

Page: 165 / 204

CG Drives & Automation 01-5980-01r2 Technical data 161
13.3 Environmental conditions
13.3.1Derating at high temperature
The Emotron TSA softstarter is made for operating at
maximum 40°C (104
°F)
ambient temperature without
derating.
Above this temperature it is necessary to ensure that
insufficient cooling does not impair the performance of the
softstarter, therefore a derating is done.
At temperatures of above 40°C (104
°F)
, the derating of the
nominal current is 2% per centigrade
(1.1%/ degree F)
. The
Emotron TSA softstarter can be operated at an ambient
temperature of up to 55°C (131
°F)
, in which case it can
only be operated at 70% of the nominal current.
Example:
A motor with the following data is going to be used in an
ambient temperature of 50°C (12
°F)
:
Voltage: 400 V
Current: 70 A (normal duty)
Power: 37 kW
Due to the high temperature the TSA model 52-070 will no
longer be adequate for the purpose.
Derating 2%/°C is calculated for a temperature of 10°C
above the rated:
10°C x 2% = 20%
Hence the nominal current must be derated by 20%.
To select a model that is adapted to the derating demands,
the next higher rated model is checked, TSA52-085, rated
for 85 A nominal current:
85 A - (20% x 85 A) = 68 A, which is lower than the
required 70 A.
An even higher rated model is checked, TSA52-100, rated
for 100 A nominal current:
100 A - (20% x 100 A) = 80 A, which is well above the
required 70 A, and therefore TSA52-100 is the model to be
selected in this case.
Normal operation
Ambient temperature
0°C to 40°C (32 °F - 104 °F)
(Max 55°C (131°F) by derating 2%/°C (1.1%/ degree F) in excess of 40°C (104 °F), see 13.3.1).
Atmospheric pressure 86 - 106 kPa (12.5 - 15.4 PSI)
Relative humidity Max 95%, non-condensing
Altitude
Max 1,000 m (3280 ft)
(Max 4,000 m (13123 ft) by derating 1%/100 m(328 ft) in excess of 1,000 m (3280 ft); with I/O board
max 2,000 m (6562 ft), see 13.3.2).
Vibrations
According to IEC 60721-3-3:
Mechanical conditions, class 3M4 (2 - 9 Hz, 3.0 mm (0.00984 ft) and 9 - 20 Hz, acc. 1 g (0.035 oz)
(10 m/s
2
)
Contamination
According to IEC 60721-3-3:
Chemically active substances, class 3C3 (conformal coating - all printed circuit boards are coated)
Mechanically active substances, class 3S1 (no sand; dust <0.01 mg/m
3
, deposited <0.4 mg/(m
2
*h))
Biological conditions, class 3B1 (no risk for harmful biological attacks - mould, fungus, animals, etc)
Storage
Ambient temperature
-25°C to +70°C (-13 to +104 °F)
Atmospheric pressure 86 - 106 kPa (12.5 - 15.4 PSI)
Relative humidity Max 95%, non-condensing