21.12.98
Operating manual
04_GB
ACP 3000 — 0.37–15.0
23
Berges electronic
•
D–51709 Marienheide-Rodt
•
Tel. 02264/17-0
•
Fax 02264/17126
3.6.4
Line Starting
ACP 3000 is designed to provide controlled starting and stopping of AC motors by use of
the keypad or external contacts connected to the control terminal strip. The drive may also
be started by using a maintained contact (2-wire operation). To prevent accidental starting
of the motor, the inverter has linestart-lockout as a standard feature. This provision can be
defeated by programming
82-START
The inverter may be started once every two (2) minutes in this mode.
3.7
Motor Connection
Connect the motor cable to the “M1, M2, M3” and “PE” terminals.
The inverter will be deactivated if shorted to the motor terminals.
The output of the drive will always be three phase. Do not connect single-phase mo-
tors to the inverter output terminals M1, M2 or M3.
Never use power factor correction capacitors on the motor terminals M1, M2 and M3,
or damage to the semi-conductors will result.
We recommend PTC evaluation using commercially available devices to achieve effective
protection of the motor.
If interrupting contacts (e.g. contactors or motor protection switches etc.) have to be in-
stalled between the motor and inverter, the circuit must be configured so as to ensure that
the “Enable” signal (terminals V+ and FWD/REV by pull-up logic, terminals CM and FWD/
REV by pull-down logic) is deactivated before separation of the inverter/motor connection.
A relay switching time of approx. 30 ms suffices.
In the case of special motors, the corresponding Volt/Hz values can be programmed on the
inverter by means of the parameters
53-FKNEE
and
32-FMAX
. In cases of doubt, please
contact BERGES or refer to chapters 5.2 and 9.1.
3.8
Reducing Current Surges and Voltage Transients
Voltage spikes caused by coils (inductors operated on the same mains as the inverter) can
lead to malfunctions of the inverter. In cases of this kind, the affected windings of contactors
and relays operated on the 230 VAC mains must be damped by fuses in the form of an RC
series circuit:
•
Main Circuit Contactors and Solenoids: C = 0.2 MFD, 500 VDC; R = 500 W, 5 Watts.
•
Auxiliary Control Circuit Relays:
C = 0.1 MFD, 500 VDC; R = 200 W, 2 Watts.
Connection Diagram for AC and DC Relay Coils and Solenoids:
Figure 3.2
ATTENTION!
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