07-02-12-02-EN-V1215.doc / Type: 638
61
● Function Softstart
When switch on the supply voltage the DC link capacities become over a resistance loaded.
Attain the undervoltage threshold + constant waiting period (2,4s) that becomes charging resistor by
a relay bridges. The operating status „undervoltage “changes at the same time in „ready“.
When switching the supply voltage off the soft starting function becomes only after falling below
undervoltage threshold again actively. It is therefore particularly with intermediate circuit-coupled
Drives importantly before restarting the supply voltage to wait to those under voltage threshold is
reached.
Up to standard undervoltage threshold of 160V the unchargeing time for the 6A-Drives
is approx. 30 seconds.
Uncharging time to undervoltage threshold (160V) see table:
Typ 638A01..06 638B03..05 638B08..15
time max. 44sec. max. 40sec. max.60sec.
● Installation Instructions and Warnings
The DC-Link connections of the Series 638 are not short circuit - and earth fault proof and not
protected against polarity reversal. A short circuit on the DC-Bus wires can be damage the
rectifier in the Device.
In order to protect the rectifier also in the circuit variant 1, mains fuses of the class gRL must
be set in. These are fuses with combined protection for wires and semiconductors.
With a common DC link bus, one should employ the 638A Series of Servo Drives exclusively.
Drives which are located immediately next to each other, within the same control cabinet,
should be carefully arranged with the DC links being made employing a short wire connection.
Note:
Connect maximum 4 Servo drives together.
Note:
Units should be turned on together as shown. (Contactor K1)
Switching delays can endanger the function of the rectifier and the
“soft-power-up-circuitry“, (wear effect).
Note:
The failure of individual AC fuses can go unnoticed as the power continues
to be delivered through the DC-bus of the units connected in parallel.
Regular checks of the fuses are therefore strongly recommended.
Note:
Careful planning and wiring are imperative!
A short-circuit on DC bus link connections can cause serious damage to the
rectifiers and drives.
Note:
With single phase power-supply at 638A Devices it is recommended that only
To Next Page
Loading...
Need help?
General
