Inovance MD880 Series - Operational Characteristics

1 Product Information
- 20 -
1.7 Overload Capacity
For some drive systems where overload may occur, a proper reference load current is
necessary for the MD880 series AC drive (single drive system). When the drive system
runs at the reference load current (load duration 300s), an overload occurs.
1) Curve in light overload mode
The reference load current in light overload mode (IL) is based on a 60s 110% duty
cycle.
*
-
*
-
4IPSUUJNFDVSSFOU
3BUFEDVSSFOUDPOUJOVPVT
#BTJDMPBEDVSSFOUJOMJHIUPWFSMPBE*
-
T
T
*$VSSFOUPGGSFRVFODZDPOUSPMQSPEVDU
U5JNF
Figure 1-5 Curve in light overload mode
2) Curve in heavy overload mode
The reference load current in heavy overload mode (IH) is based on a 60s 150% duty
cycle.
*
)
*
)
-JNJUFETIPSUUJNFDVSSFOU
3BUFEDVSSFOUDPOUJOVPVT
#BTJDMPBEDVSSFOUJOIFBWZPWFSMPBE*
)
*$VSSFOUPGGSFRVFODZDPOUSPMQSPEVDU
U5JNF
T
T
Figure 1-6 Curve in heavy overload mode