3KC3 and 3KC6 transfer switching equipment3KC3 and 3KC6 transfer switching equipment
Step 2: Setting DIP switches
The four DIP switches are used to manually set the control unit to suit individual requirements. A screwdriver is required for this. The different preset options are explained below the DIP switch.
DIP switch |
Explanation |
---|---|
A-B |
|
C-D |
|
E-F |
|
G-H |
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Procedure
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Open the cover.
Open the cover -
Ensure that the first DIP switch is in position A ("READY").
On the second DIP switch, set the voltage and frequency limit values above which the source is to be identified as faulty.If the second DIP switch is in position C, ΔU = 10% and ΔF = 5%.
If the second DIP switch is in position D, ΔU = 20% and ΔF = 10%.Set the voltage and frequency limit valuesIn order to prevent permanent switching in the event of minor network fluctuations, a hysteresis of 20% of voltage and frequency difference is integrated.
The behavior is illustrated in the figure below.Availability of the source -
On the third DIP switch, set an additional time delay of 2 s in position 0.
If the DIP switch is in position E, no additional time delay in position 0 is set.
If the DIP switch is in position F, an additional time delay of 2 s in position 0 is set.Set additional time delay of 2 secondsNOTE
The transfer and return transfer of the transfer switching equipment to the available source are extended by the time delay in position 0 set on the DIP switch in addition to the transfer and return transfer time delay set on the potentiometer.
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Use the fourth DIP switch for priority settings:
If the DIP switch is in position G, the transfer switching equipment has priority.
If the DIP switch is in position H, the transfer switching equipment has no priority.Set priorityNOTE
In the case of the 3KC6 transfer switching equipment, the source on switch I is normally the prioritized source. The prioritized source (I or II) can be changed via inputs 209-207 however. For information, see the section titled Functions of the inputs of the 3KC6 transfer switching equipment.
NOTE
The Auto LED is extinguished when settings are carried out on DIP switch A-B. When settings are made on the other three DIP switches, the "Auto" LED remains unchanged.