Yaskawa V7 Drives - Manual (Page 57)

5-5
n175 : Reduce carrier at low speed selection Factory Setting: 0
Range: 0 or 1
When n175 is enabled (= “1”), the carrier frequency will automatically be reduced to 2.5 kHz,
regardless of the setting of n080, whenever the output frequency is at or below 5 Hz AND the
output current is above 110% of drive rated current.
SETTING DESCRIPTION
0 Disabled
1 Carrier frequency reduced to 2.5 KHz
Factory
Setting
Frequency
(kHz)
Derated
Output
Current (A) (2)
(1) Output current rating of 21.0A applies only to V74X drive.
(2) Derated Output Current values are the maximum currents available with a
carrier frequency n080 setting of “4” (10kHz).
Setting carrier frequency to a value higher than its factory setting requires derating of the drive’s output
current - refer to the following table:
Rated
input
Old Drive
Model No.
New Drive
Model No.
CIMR-V7A*
Rated
Output
Current (A)
n080
No
Derate
7.0
10.0
16.5
23.0
30.0
1.0
1.6
3.0
4.0
No Derate
14.0
17.0 / 19.8
MVA001
MVA002
MVA003
MVA005
MVA008
MVA011
MVA017
MVA025
MVA033
MVB001
MVB002
MVB003
MVB005
MVB009
MVB015
MVB018
20P10
20P20
20P40
20P70
21P50
22P20
23P70
23P71
23P72
40P20
40P40
40P70
41P50
43P70
43P70
43P70
230V
460V
0.8
1.6
3.0
5.0
8.0
11.0
17.5
25.0
33.0
1.2
1.8
3.4
4.8
8.6
14.8
18.0 / 21.0 (1)
4
4
4
4
3
3
3
3
3
3
3
3
3
3
3
3
10
10
10
10
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
DRIVE DERATING FOR HIGHER CARRIER FREQUENCY
Carrier frequency should be decreased as the distance between the drive and the motor increases,
to reduce capacitive coupling in the motor leads.
• For wiring distances greater than 100m (328 ft.), n080 should be set to 5 kHz (data " 2 " )
or less.