50
GeNerAL eLecTrIcAL DATA
3.4 General electrical data
3.4.1 Switching frequency and temperature of the 230 V devices
Device size
10
12
13
14
Rated switching frequency
1)
f
SN
/ kHz
8
4
4
4
Max. switching frequency
1)
f
S_max
/ kHz
16
Min. switching frequency
1)
f
S_min
/ kHz
2
Max. heat sink temperature
T
HS
/ °C
90
Temperature for derating the switching frequency
T
DR
/ °C
80
Temperature for uprating the switching frequency
T
UR
/ °C
70
Temperature for switching to rated switching
frequency
T
EM
/ °C
85
Table 35:
Switching frequency and temperature of the 230 V devices
3.4.2 Switching frequency and temperature of the 400 V devices
Device size
12
13
14
15
16
Rated switching frequency
1)
f
SN
/ kHz
8
8
4
4
2
4
Max. switching frequency
1)
f
S_max
/ kHz
16
Min. switching frequency
1)
f
S_min
/ kHz
2
Max. heat sink temperature
T
HS
/ °C
90
Temperature for derating the switching frequency
T
DR
/ °C
80
Temperature for uprating the switching frequency
T
UR
/ °C
70
Temperature for switching to rated switching
frequency
T
EM
/ °C
85
Table 36:
Switching frequency and temperature of the 400 V devices
1)
The output frequency is to be limited in such a way that it does not exceed 1/10 of the switching
frequency.
The drive converter cooling is designed by way that the heat sink overtemperature
threshold is not exceeded at rated conditions. A switching frequency higher than the rat-
ed switching frequency also produces higher losses and thus a higher heat sink heating.
If the heat sink temperature reaches a critical threshold (
T
DR
), the switching frequency
can be reduced automatically step by step. This prevents that the drive converter switch-
es off due to overheating of the heat sink. If the heat sink temperature falls below
T
UR
,
the switching frequency is increased back to the setpoint. At temperature
T
EM
the switch-
ing frequency is immediately reduced to rated switching frequency. „Derating“ must be
activated, for this function to work.
Summary of Contents for COMBIVERT 10F6 Series
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