Preprogrammed Faults; Overcurrent; Dc Overvoltage; Dc Undervoltage - ABB ACS800 Series Firmware Manual

Preprogrammed Faults

Overcurrent

The overcurrent trip limit for the drive is 1.65...2.17 × I
type.

DC overvoltage

The DC overvoltage trip limit is 1.3 ·U
supply voltage range. For:
400 V units, U
500 V units, U
690 V units, U
The actual voltage in the intermediate circuit corresponding to the supply voltage trip
level is:
728 VDC for 400 V units,
877 VDC for 500 V units, and
1210 VDC for 690 V units.

DC undervoltage

The DC undervoltage trip limit is 0.6 · U
supply voltage range. For:
400 V and 500 V units, U
690 V units, U
The actual voltage in the intermediate circuit corresponding to the supply voltage trip
level is:
307 VDC for 400 V and 500 V units, and
425 VDC for 690 V units.

Drive temperature

The drive supervises the inverter module temperature. If the inverter module
temperature exceeds 240 °F (115 °C), a warning is given. The temperature trip level
is 260 °F (125 °C).
Enhanced drive temperature monitoring for ACS800-U2, -U4 and -U7, frame sizes
R7 and R8
Traditionally, drive temperature monitoring is based on the power semiconductor
(IGBT) temperature measurement, which is compared with a fixed maximum IGBT
temperature limit. However, certain abnormal conditions, such as cooling fan failure,
insufficient cooling air flow, or excessive ambient temperature might cause
overheating inside the converter module, which the traditional temperature
monitoring alone does not detect. The Enhanced drive temperature monitoring
improves the protection in these situations.
The function monitors the converter module temperature by checking cyclically that
the measured IGBT temperature is not excessive considering the load current,
ambient temperature, and other factors that affect the temperature rise inside the
converter module. The calculation uses an experimentally defined equation that
1max
is 415 V,
1max
is 500 V,
1max
is 690 V.
1max
is 380 V
1min
is 525 V.
1min
depending on the drive
max
, where U is the maximum value of the
1max
where U is the minimum value of the
1min, 1min
41
Program features