ADDENDUM TO THE CFW-08 FREQUENCY INVERTER USER MANUAL
ADDENDUM TO THE CFW-08 FREQUENCY INVERTER USER MANUAL
10
As an alternativecriterion, we recommend to add a line reactor always the
transformerthatsuppliestheinverterhas ratedoutputhigherthanindicated
in the table below.
Inverter Model Transformer Apparent Power [kVA]
1.7A / 500-600V 30 xrated inverter apparent power [kVA]
3.0A / 500-600V 10 xrated inverter apparent power [kVA]
4.3-7.0-10 / 500-600V 7.5 x rated inverter apparent power [kVA]
12A / 500-600V 4 x rated inverter apparent power [kVA]
Table 9 – Alternative criteria for use of line reactor –
Maximum values of the transformer power
11. Dynamic Braking (User Manual Item 8.21)_________________
Table 10 - Recommended braking resistors
(*1) Therms braking currentcan bedeterminedby:
Inverter Model
Maximum
Braking
Current
P
max
(Maximum
Resistor Power)
RMS Braking
Current
(*1)
P
rated
(Rated
Resistor Power)
Resistor
Recommended
Wiring
1,7A / 500-
1,2 1,2kW 0,6 0,3kW 825 1.5mm
2
/ 16 AWG
3,0A / 500-
2,6 2,6kW 1,3 0,7kW 392 1.5mm
2
/ 16 AWG
4,3A / 500-
4,0 4,0kW 2,0 1.0kW 249 1.5mm
2
/ 16 AWG
7,0A / 500-
6,0 5,9kW 3,0 1,5k\V 165 1.5mm
2
/ 16 AWG
10A / 500-600V 9,0 8,9kW 4,5 2,2kW 110 2.5mm
2
/ 14 AWG
12A / 500-600V 12,2 12,2kW 6,1 3,1kW 82 2.5mm
2
/ 14 AWG
where t
br
corresponds to the sum of the braking times during the most
severe 5 minute cycle.
t
[min]
br
5
I
rms
= I
max
x
10. Line Reactor (User Manual Item 8.19)____________________
Table 8 – Minimum network impedance for several load conditions
Minimum Line ImpedanceInverter Model
With rated load at the
inverter output
(Is = Isnom)
With 80% of the rated
load
(Is = 0.8.Isnom)
With 50% of therated
load
(Is = 0.5.Isnom)
1.7A / 500-600V 0.25% 0.1%
3.0A / 500-600V 0.5% 0.25%
4.3A / 500-600V 0.5% 0.25%
7.0A / 500-600V 0.5% 0.25%
10A / 500-600V 1.0% 0.5%
12A / 500-600V 1.0% 0.5%
0.05%