6-67
6
îš‹ OL2 Characteristics at Low Speed
At output frequencies below 6 Hz the overload capability of the inverter is lower than at higher speeds, i.e. an
OL2 fault (inverter overload) may occur even if the current is below the normal OL2 current level (see Fig.
6.61).
Fig 6.66 OL2 Alarm Level at Low Frequencies
îš„Related Parameters
Generally it is not recommended to disable this function.
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L8-15OL2 characteristics selection at low speeds 1 No AAAA
OL2 Detection Level*
Output
Speed
0 Hz
150% (120%)*
for 1 min.
-6 Hz 6 Hz
75% (60%)*
for 1 min.
* Note that the OL2 level depends on the setting of C6-01. The values are given for
Heavy Duty. The values in parentheses are for Normal Duty 1 or 2.
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