Igbts Overtemperature Protection (F0051 And A0050); Overcurrent Protection (F0070 And F0074) - WEG CFW501 V1.8X Programming Manual

Faults and Alarms

14.4 IGBTS OVERTEMPERATURE PROTECTION (F0051 AND A0050)

The power module is monitored and indicated in parameter P0030 in degrees Celsius. This value is constantly
compared to the overtemperature fault and alarm trigger value of the power module F0051 and A0050, according
to Table 14.2: Overtemperature actuation levels of the power module F0051 on page
actuation of the alarm A0050 is fixed at 5 ºC below the level of F0051.
Besides the alarm indication A0050, the overtemperature protection automatically reduces the switching frequency
(P0297) for the value of 2500 Hz when the temperature (P0030) reaches 80 % of the F0051 level and the output
current (P0003) is above the rated current (P0295). This overtemperature protection function can be deactivated
in the control configuration parameter P0397.
ATTENTION!
An improper change of P0397 may damage the inverter. Only do that under WEG technical directions.

14.5 OVERCURRENT PROTECTION (F0070 AND F0074)

The ground fault and output overcurrent protections act very fast by means of the hardware to instantly cut the
output PWM pulses when the output current is high.
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Fault F0070 corresponds to a current surge between output phases, while fault F0074 indicates surge of phase
to the ground (PE).
The protection current level depends on the used power module so as the protection is effective, still this value is
well above the inverter rated operating current (P0295).
14-6 | CFW501
Table 14.2: Overtemperature actuation levels of the power module F0051
Frame
Frame A
Frame B
Frame C
Model
1.6 A / 200 V
2.6 A / 200 V
4.3 A / 200 V
7.0 A / 200 V
9.6 A / 200 V
1.0 A / 400 V
1.6 A / 400 V
2.6 A / 400 V
4.0 A / 400 V
6.1 A / 400 V
7.3 A / 200 V
10 A / 200 V
16 A / 200 V
2.7 A / 400 V
4.3 A / 400 V
6.5 A / 400 V
10 A / 400 V
24 A / 200 V
14 A / 400 V
16 A / 400 V
14-6. where the level for
Level F0051
80 °C
80 °C
80 °C
93 °C
100 °C
97 °C
97 °C
97 °C
97 °C
123 °C
85 °C
95 °C
110 °C
105 °C
105 °C
105 °C
110 °C
120 ºC
110 ºC
110 °C