K8DT-PZ
3
Connections
Terminal Diagram
Note:
Do not connect anything to terminals that are shaded in gray.
Wiring Example
Relay Output
Transistor Output
Note:
Use copper wires with a rating of 75°C or an equivalent rating.
Timing Charts
Overvoltage, Undervoltage, Phase Sequence, and Phase Loss Operation Diagram
Inside
Inside
(2) Output
C: Relay Output
T: Transistor Output
14
11
12
14
11
(1) Input Voltages
3-phase,
3 W
power
supply
Phase-to-phase voltage:
200 to 240 VAC
PZ1
PZ2
L1
L3
L2
3-phase,
3 W
power
supply
Phase-to-phase voltage:
380 to 480 VAC
L1
L3
L2
K8DT-PZ1 C N
(1) (2)
L1
14
L2
11
12
L3
DIP SW
3-phase
voltage
Motor
Power
supply
AC/DC
L1
L2
L3
DIP SW
L1
14
L2
11
12
L3
PLC
Moter
Power
supply
AC/DC
L1
L2
L3
DIP SW
L1
14
L2
11
L3
3-phase
voltage
L1
L3
L2
L3
L2
L1
Flashing
Flashing
L1
L2
L3
Phase Loss Operation
Phase sequence Operation
t: Operating time (0.1 to 30 s)
t: Operating time (0.1 to 30 s)
t1: Power ON lock (1 s)
t
t: Operating time (0.1 to 30 s)
t
t1
t
Alarm indicator
Undervoltage set value
Overvoltage set value
Contacts 11-14 or
transistor output
L1
L2
Input
L3
Hysteresis: Fixed at 2%
Hysteresis: Fixed at 2%
Hysteresis: Fixed at 2%
Lit
Flashing
Lit
Flashing
Lit
Flashing
L1
Input L2
L3
Alarm indicator
Contacts 11-14 or
transistor output
Lit
Lit
Lit
L2
L1
L3
Flashing
Asymmetry set value
Delay time: 250 ms
(reference value)
Delay time: 250 ms
(reference value)
Delay time: 250 ms
(reference value)
Operation Table
*1.
L1 and L2 are also used for the power supply. If the
voltage becomes very low, the indicator will turn OFF.
*2.
The indicator will flash once per second after an
incorrect phase is detected and once per 0.5 second
during the detection time.
Item
Indicators
Output
operation
OUT_LED
ALM_LED
Normal
ON
OFF
ON
Overvoltage
OFF
ON
OFF
Undervoltage
OFF
ON
OFF
Asymmetry
OFF
ON
OFF
Phase loss
OFF
ON *1
OFF
Phase
sequence
OFF
Flashing *2
OFF
Note: 1.
The K8DT-PZ
@
output contacts are normally operative.
2.
The power ON lock prevents unnecessary alarms from being generated
during the unstable period when the power is first turned ON. There is no
contact output during timer operation.
3.
Phase loss is detected by a drop in the L1, L2, or L3 voltage. A phase loss is detected
when any of the phase-to-phase voltages goes below 60% of the rated input.
4.
L1 and L2 are also used for the power supply. If the voltage becomes very
low, the Relay will not operate.
5.
Phase loss (on power supply side and load side) is not detected in the motor
load during operation.
