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K8DT-VS
Questions and Answers
Q
Checking Operation
Overvoltages
Gradually increase the input from 80% of the set value.
The input will equal the operating value when the input
exceeds the set value and the alarm indicator starts flashing.
Operation can be checked by the contact outputs that will
start after the operating time has passed.
Undervoltage
Gradually decrease the input from 120% of the set value and
check the operation using the same method as for
overvoltage.
Example: Overvoltage Operating Mode and an Operating Time of 5 s
Note: K8DT-VS@ output relays are normally operative.
Set value
Current input
Alarm indicator
Contact output or
transistor output
Connection Diagram
200 VAC
Variable
autotransformer
±
Cycle counter
8
Flashing
Lit
5 s
Input terminals
V
0 to 300 V
A1
Power supply
A2
C 200 V
Q
How to Measure the Operating Time
Overvoltage
Change the input suddenly from 0% to 120% of the set value
and measure the time until the Unit operates.
Undervoltage
Change the input suddenly from 120% to 0% of the set value
and measure the time until the Unit operates.
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