Altitude And Temperature De-Rating; Motor Cable Length - Toshiba T300MVi MEDIUM VOLTAGE Instruction Manual

Altitude and Temperature De-rating

Altitude Derate Chart **
Altitude
3,300'
4,000'
4,500'
5,000'
6,000'
7,000'
8,000'
9,000'
10,000'
** Applications above 5000 feet may also require special magnetics. Consult Toshiba Engineering.
Temperature Derate Chart
Ambient Temperature
40 C
45 C
50 C

Motor Cable Length

Below are cable length guidelines for use with most standard industrial motors.
Suggested Maximum Output Cable Distances
AC Motor Voltage
2300
2300/4000
4000V or 2300/4000
CAUTION
(1) Older motors, or motors with marginal insulation systems, may require filters to help reduce the stress on
the insulation system. Consult Toshiba application engineering.
(2) Exceeding the peak voltage and allowable rise time of the motor insulation system will reduce motor life
expectancy. To insure good insulation life, consult with the motor supplier to determine motor insulation
ratings and allowable maximum output lead distance. Long lead lengths between the motor and drive may
require that filters be added to the drive output.
% Amp Output Derate
0.0%
2.0%
3.3%
4.7%
7.5%
10.2%
12.9%
15.7%
18.4%
% Amp Output Derate
0.0%
7.5%
15.0%
Drive Output Voltage
2400V
2400V
4160V
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Max lead length
without filter
0-1000 ft
0-1000 ft
0-1000 ft