2
Three-phase Voltage Relay
K8AB-PW
Cat. No. N148-E1-01
Ordering Information
■
List of Models
Note: 1.
Three-phase 3-wire or 4-wire and the input range are switched using a switch.
2.
The power supply is shared with the rated input voltage.
Ratings and Specifications
■
Ratings
Three-phase Voltage Relay
Rated input (See note 2.)
Model
3-phase 3-wire mode
200, 220, 230, 240 VAC
K8AB-PW1
3-phase 4-wire mode
115, 127, 133, 138 VAC
3-phase 3-wire mode
380, 400, 415, 480 VAC
K8AB-PW2
3-phase 4-wire mode
220, 230, 240, 277 VAC
Rated input
voltage
K8AB-PW1
Three-phase, three-wire mode: 200, 220, 230, 240 VAC
Three-phase, four-wire mode: 115, 127, 133, 138 VAC
K8AB-PW2
Three-phase, three-wire mode: 380, 400, 415, 480 VAC
Three-phase, four-wire mode: 220, 230, 240, 277 VAC
Operation
(overvoltage and
undervoltage)
Operating value setting
range
Overvoltage =
−
30% to 25% of maximum rated input voltage
Undervoltage =
−
30% to 25% of maximum rated input voltage
Note: The rated input voltage is switched with a switch.
Operating value
100% operation at set value
Reset (HYS.)
Hysteresis
5% of operating value (fixed)
Resetting method
Automatic reset
Operating time (T) Overvoltage/
undervoltage
0.1 to 30 s (Value when input rapidly changes from 0% to 120%.)
Power ON lock (LOCK)
1 s or 5 s (Value when input rapidly changes from 0% to 100%. The operating time is the shortest
at this point.)
Setting accuracy
±10% of full scale
Time error
±10% of set value (Minimum error: 50 ms)
Input frequency
45 to 65 Hz
Input impedance
100 k
Ω
min.
Indicators
Power (PWR): Green LED, Relay output (RY): Yellow LED, Alarm outputs (ALM1/2): Red LED
Output relays
Two SPDT relays (6 A at 250 VAC, resistive load)
Normally closed operation (normally ON) (separate outputs possible for overvoltages and
undervoltages)
