4
Single-phase Voltage Relay
K8AB-VS
Cat. No. N143-E1-01
Connections
■
Wiring Diagram
Overcurrent Operation Diagram
(Output: Normally Closed)
Note:
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.
Undercurrent Operation Diagram
(Output: Normally Open)
Note:
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.
Nomenclature
■
Front
Indicators
Setting Knobs
T1
T
Input
Hysteresis
(5% to 50% of operating value)
Lit
Flashing
Operating value
Control power
Relay
Alarm indicator
T: Operating time (0.1 to 30 s)
T1: Startup lock time (1 or 5 s)
Control power
Relay
Operating value
Alarm indicator
Input
Lit
Flashing
T1
T1: Power ON lock (1 or 5 s)
T
T: Operating time (0.1 to 30 s)
Hysteresis
(5% to 50% of operating value)
Model
Measuring range
Connection
K8AB-VS1
6 to 60 mV AC/DC
V1-COM
10 to 100 mV AC/DC
V2-COM
30 to 300 mV AC/DC
V3-COM
K8AB-VS2
1 to 10 V AC/DC
V1-COM
3 to 30 V AC/DC
V2-COM
15 to 150 V AC/DC
V3-COM
K8AB-VS3
20 to 200 V AC/DC
V1-COM
30 to 300 V AC/DC
V2-COM
60 to 600 V AC/DC
V3-COM
Output
COM
A1
A2
V1
V2
V3
14
12
11
Single-phase power
Operating
power
Alarm
Input
Load
Power indicator
Relay status indicator
Voltage knob (SV)
Hysteresis knob (HYS.)
Operating time knob (T)
Alarm indicator
Item
Meaning
Power indicator (PWR:
Green)
Lit when power is being supplied.
Relay status indicator (RY:
Yellow)
Lit when relay is operating.
Alarm indicator (ALM: Red) Lit when there is an overvoltage or
undervoltage.
The indicator flashes to indicate the
error status after the input has
exceeded the threshold value while the
operating time is being clocked.
Item
Usage
Current knob (SV)
Used to set the current to 10% to 100%
of maximum rated input current.
Hysteresis knob (HYS.)
Used to set the rest value to 5% to 50%
of the operating value.
Operating time knob (T)
Used to set the operating time to 0.1 to
30 s.
