,QWHUQDWLRQDO(QJOLVK (1*,1((5,1*,1)250$7,21
MICROMASTER 420 Reference Manual
Issue A1
23
50 m of unscreened cable or 100 m of screened or armoured cable. Note that if
EMC filters are fitted (internally or externally) the relevant standards are met with
up to 25 m of unscreened cable, and 50 m of screened, subject to careful layout.
Table 2-4 shows that, in certain cases, longer cable lengths are permissible,
subject to the notes below.
1RWHV
•
The table applies to inverters operated at or below their maximum rated
current. Operation in excess of this (e.g. overload) may result in premature
shutdown due to overheating or overcurrent.
•
The table is valid for the default switching frequency of the inverter. (Usually
16 kHz or 4 kHz). Selecting a lower frequency will reduce the dissipation in
the inverter, but does not reduce the peak current values so the permissible
cable length is largely unaffected.
•
The applicable cable length may be increased by a further 25% if an output
inductor (choke) is fitted. See below.
•
Where long cable lengths are permitted, or where output chokes are fitted,
care must be taken to ensure that the maximum voltage drop (including the
drop in the choke, if fitted) does not exceed 5%.
•
Low voltage units (230 V) are tested at 264 V, 50
0
C, Full load current, High
voltage units (400 V) at 440 V 50
0
C, Full load current.
Table 2-4 Maximum Cable Lengths
,QYHUWHU 6FUHHQHG&DEOH
/HQJWKPHWUHV
8QVFUHHQHG&DEOH
/HQJWKPHWUHV
120 W – 750 W 200 V – 240 V 100 150
370 W – 1.5 kW 380 V – 480 V 75 100
1.1 W – 2.2 kW 200 V – 240 V 75 100
2.2 W – 4 kW 380 V – 480 V 150 200
3.0 W – 5.5 kW 200 V – 240 V 150 200
5.5 W – 11 kW 380 V – 480 V 150 200
To Next Page
Loading...
Need help?
General
