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4.3.6 Motor Lead Length
parameter 803 (PWM Frequency)
.
Nuisance trips can occur due to capacitive current flow to ground. These currents can cause shock to
personnel and can create problems within the motor. Care should be taken when working in these areas.
Some applications can have a restricted lead length because of type of wire, motor type, or wiring
placement. Consult the factory and the motor manufacturer for additional information.
4.3.7 Using Output Contactors
Contactors in the output wiring of an AC drive may be needed as part of the approved safety circuit.
Problems can arise if these contactors are opened for the safety circuit and the drive is left in run mode of
operation. When the contactor is open, the drive is in a no-load, no-resistance state, but is still trying to
supply current to the motor. However, when the contactor closes, the drive sees the motor resistance and
instantly demands current. This inrush of current when the contactor closes can fault or cause failure to
the drive.
To prevent problems, interlock an auxiliary contact to the drive’s Run or Enable circuit to stop the drive
when the contactor opens. In this way, the drive will be disabled and no inrush will occur when the
contactor is closed again.
4.4 Terminals Found on the Vacon 500x Power Board
4.4.1 Description of the Terminals
Table 4 describes the Vacon 500x power terminals.
Terminal
Description
L1/R
L2/S
L3/T
These terminals are the line connections for input power. (Single-phase 230 Vac,
4 kW/5 HP
models connect to any two of these terminals.)
T1/U
T2/V
T3/W
These terminals are for motor connections.
Table 4: Description of Vacon 500x Power Terminals
Содержание 500X
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