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K8AK-VW
Wiring Example
Single-phase
power supply
Power
A2
A1
supply voltage
Timing Charts
●Overvoltage and Undervoltage Operation
Diagram
DIP switch settings: SW3 and SW4 both ON or both OFF.
Power supply voltage
Overvoltage set value (AL1)
Input
Undervoltage set value (AL2)
AL1 alarm indicator
Flashing
AL2 alarm indicator
Overvoltage (AL1) relay
(11-14)
Undervoltage (AL2) relay
(21-24)
t1: Power ON lock (1 s or 5 s)
t1
Note: 1. The K8AK-VW@ output relay is normally operative.
2. The power ON lock prevents unnecessary alarms from
being generated during the instable period when the power
is first turned on. There is no relay output during timer
operation.
●Overvoltage and Overvoltage Operation
Diagram (Overvoltage Pre-alarm Mode)
DIP switch settings: SW3 ON and SW4 OFF.
Power supply voltage
Overvoltage setting (AL1)
Overvoltage setting (AL2)
Input
Flashing
AL1 alarm indicator
Flashing
AL2 alarm indicator
Overvoltage (AL1) relay
(11-14)
Overvoltage (AL2) relay
(21-24)
t1: Power ON lock (1 s or 5 s)
t1
Note: 1. The K8AK-VW@ output relay is normally operative.
2. The power ON lock prevents unnecessary alarms from
being generated during the instable period when the power
is first turned on. There is no relay output during timer
operation.
4
21
24
22
V1
V2
V3
A1
A2
C
11
12
14
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Flashing
Lit
t
t: Operating time (0.1 to 30 s)
Lit
Delay: 250 ms
(reference value)
Delay: 250 ms
(reference value)
t: Operating time (0.1 to 30 s)
t
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Lit
Lit
Delay: 250 ms
(reference value)
Delay: 250 ms
(reference value)
Load
Power supply
AC/DC
●Undervoltage and Undervoltage Operation
Diagram (Undervoltage Pre-alarm Mode)
DIP switch settings: SW3 OFF and SW4 ON.
Power supply voltage
Input
Undervoltage set value (AL1)
Undervoltage set value (AL2)
AL1 alarm indicator
AL2 alarm indicator
Undervoltage (AL1) relay
(11-14)
Undervoltage (AL2) relay
(21-24)
Note: 1. The K8AK-VW@ output relay is normally operative.
2. The power ON lock prevents unnecessary alarms from
being generated during the instable period when the power
is first turned on. There is no relay output during timer
operation.
Flashing
Lit
Flashing
Lit
t1: Power ON lock (1 s or 5 s)
t1
Delay: 250 ms
(reference value)
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Delay: 250 ms
(reference value)
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