Technical information
vacon • 77
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6.3.3
NXI - Inverter units
6.3.3.1
Drive sizes FR4-FR8
Table 18. Technical specifications for size FR4-FR8 inverter units (INU)
AC input
connection
Input voltage U
in
465-800 V DC; 640-1100 V DC; –0%…+0% ,
The ripple voltage of the inverter supply voltage gen-
erated during the rectification of the fundamental fre-
quency AC voltage must be less than 50 V peak-to-
peak.
Connection to DC supply
Once per minute or less (normal)
Starting delay
2 s
Motor
connection
Output voltage U
out
3~ 0 - U
in
/ 1.4
Continuous output
current
I
H
: Ambient temperature max. +50°C,
overloadability 1.5 x I
H
(1 min./10 min.)
I
L
: Ambient temperature max. +40°C,
overloadability 1.1 x I
L
(1 min./10 min.)
Starting torque
I
S
for two seconds, depends on the motor
Peak current
I
S
for 2 s every 20 s
Output frequency
0-320 Hz; 7200 Hz (special use)
Frequency resolution
Depends on application
Control
characteristics
Control method
Frequency control U/f
Open loop sensorless vector control
Closed loop frequency control
Closed loop vector control
Switching frequency
NXI_xxxx 5: 1-16 kHz; Factory default 10 kHz
(NXI_0072 and greater: 1-10 kHz; Factory default
3.6 kHz)
NXI_xxxx 6: 1-6 kHz; Factory default 1.5 kHz
Frequency reference:
- Analogue input
- Panel reference
Resolution 0.1% (10-bit), accuracy ±1%
Resolution 0.01 Hz
Field weakening point
30-320 Hz
Acceleration time
0-3000 s
Deceleration time
0-3000 s
Summary of Contents for NXP series
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