21.12.98 Operating manual
04_GB ACP 3000 — 0.37–15.0
43
Berges electronic • D–51709 Marienheide-Rodt • Tel. 02264/17-0 • Fax 02264/17126
These four parameters set the torque limiting points for the inverter in both motoring and
regenerative modes with individual settings for forward and reverse operation. Programma-
ble from 10–150% in steps of 1% (110% in the case of regenerative operation). In order to
deactivate the torque limit, define a data code for
39-FTL
that is larger than
32-FMAX
. To
disable torque limiting set
39-FTL
to a value greater than
32-FMAX
.
◊
61-LTLF
Value range: 10–150% Default: 150%
62-LTLR
Value range: 10–150% Default: 150%
63-RTLF
Value range: 10–110% Default: 80%
64-RTLR
Value range: 10–110% Default: 80%
The slip of standard asynchronous motors ca be compensated for using this parameter.
Programmable from 0.00 to 12.00%. This function is automatically disabled when the PI
Regulator is enabled.
DO NOT USE THIS FUNCTION WITH SYNCHRONOUS MOTORS, AS GROSS INSTA-
BILITY MAY OCCUR.
Slip compensation is calculated as follows:
Where:
IRAT = Data Code in
03-IRAT
.
FLA = Motor Nameplate Current.
SLIP =
This parameter is inactive for 65-SLIP = 0.
◊ Value range: 0.00–12.00% Default: 0.00%
Lightly loaded motors may oscillate and become unstable due to electromechanical rela-
tionships in the motor. This may be more prevalent when the inverter capacity is larger than
the motor. Current Stability adjustment stabilizes the motor current in these conditions. The
value of
66-STAB
is adjustable between 0 and 4, with the factory default being 3.
◊ Value range: 0–4 Default: 3
67-TOL
is the timed overload trip point. This parameter defines the load point beyond which
a timed electronic overload trip can occur. The trip time depends on the amount of overload
and is 1 minute for 150% of the setting, longer for lesser degrees of overload. A 10% over-
load will not cause the drive to trip. Parameter
67-TOL
is adjustable in 1% increments from
5 to 100% of drive capacity. The factory setting is 0, inactive.
The action of
67-TOL
is presented graphically in the Trip Time chart to the follow. See also
parameter
6A-TOLC
for information on setting timed overload appropriately for your motor.
The proper setting of parameter
67-TOL
is calculated by using the value stored at
03-IRAT
and the motor nameplate current (I
m
) according to the following formula:
65-SLIP – Slip Compensation [%] 1P
66-STAB – Current Stability Adjustment 2P
67-TOL – Timed Overload Trip Point [%] 1P
ATTENTION!
65-SLIP SLIP
IRAT
FLA
--------------
× 100×=
Sync. Speed Nameplate Speed–
Sync. Speed
----------------------------------------------------------------------------------------
67-TOL
I
m
IRAT
--------------
100×=
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