Derating According To Ambient Temperature - GE VAT2000 Instruction Manual

Note 1) The output voltage indicates the output capacity [kVA] at 200V for the 200V series, and 400V
for the 400V series.
Note 2) Indicates the total effective value including the higher harmonics.
Note 3) Indicates the case for the standard 4-pole squirrel cage motor.
Note 4) When 40°C is exceeded, derate the output current by 2% for each 1°C. (Refer to Fig. 1-1.)
1 00
9 0
8 0
7 0
6 0
5 0
4 0
3 0
2 0
1 0
Note 5) Drives up to N22K0S, and X30K0S working in constant torque allow carrier frequency setting
up to 10kHz. Derate 7% current per kHz above that frequency. When these drives work in
variable torque derate above 4kHz in ratio shown in fig 1-2.
Larger drives than N22K0S or X30K0S should be derated in a 7% current per kHz above
4kHz either constant torque or variable torque as shown in fig 1-3
If the heatsink temperature 70°C is exceeded and the output current exceeds 90%, the carrier
frequency will automatically change to 4kHz.
  
  


 
  

3 4
Fig. 1-2 Derating according to carrier frequency
for drives up to N22K0 and up to X30K0
Note) When changing the carrier frequency, take care to the motor's temperature rise.
1 0 2 0 3 0
A m b ien t tem p era tu re (ºC )
Fig. 1-1 Derating according to ambient temperature
5 6 7 8 9 1 0 11 1 2
C a rrie r freq ue ncy (K H z)
Appendix
4 0 5 0
R a ted
C u rren t
1 3 1 4 1 5
Fig. 1-3
A-3
7 % o f rate d cu rre nt
3 4 5 6 7 8 9
C a rrie r freq ue ncy (K H z)
Derating according to carrier
frequency for drives larger than
N22K0 or X30K0
1 0