nord NORDAC PRO SK 511E Series - Reduced Output Current Due to Mains Voltage; Figure 18: Output Current Due to Mains Voltage; Table 41: Overcurrent Relative to Pulse and Output Frequency

SK 54xE – Users Manual for Frequency Inverters
200 BU 0505 EN-3021
230V devices: Reduced overload capacity (approx.) due to pulse frequency (P504) and output frequency
Pulse frequency [kHz]
Output frequency [Hz]
4.5 3.0 2.0 1.5 1.0 0.5 0
3...8
200%
170%
150%
140%
130%
120%
110%
10
180%
153%
135%
126%
117%
108%
100%
12
160%
136%
120%
112%
104%
96%
95%
14
150%
127%
112%
105%
97%
90%
90%
16
140%
119%
105%
98%
91%
84%
85%
400V devices: Reduced overload capacity (approx.) due to pulse frequency (P504) and output frequency
Pulse frequency [kHz]
Output frequency [Hz]
4.5 3.0 2.0 1.5 1.0 0.5 0
3...6
200%
170%
150%
140%
130%
120%
110%
8
165%
140%
123%
115%
107%
99%
90%
10
150%
127%
112%
105%
97%
90%
82%
12
130%
110%
97%
91%
84%
78%
71%
14
115%
97%
86%
80%
74%
69%
63%
16
100%
85%
75%
70%
65%
60%
55%
Table 41: Overcurrent relative to pulse and output frequency
Pos: 506 /Anleitungen/ Elektronik/F U und Starter/9. Zusatzinf ormationen [BU 0500 / BU 0200] /Reduzierte Ausgangs leistung/_Reduzi erter Ausgangsstr om aufgrund der Netzspann ung @ 0\mod_1328189086271 _388.docx @ 14374 @ 3 @ 1
8.4.4 Reduced output current due to mains voltage
The devices are designed with thermal characteristics according to the nominal output currents.
Accordingly, for lower mains voltages, higher currents cannot be taken off in order to maintain the
stated power constant. For mains voltages above 400 V there is a reduction of the permissible
continuous output current, which is inversely proportional to the mains voltage, in order to compensate
for the increased switching losses.
1.2
0.4
k
Unetz
U
netz( )
480320 Unetz
320 340 360 380 400 420 440 460 480
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
Mains voltage [V]
I / I
N
Figure 18: Output current due to mains voltage