Page top

Australia   Phone: 1300 766 766

K8AK / K8DS Series

Measuring & Monitoring Relays

K8AK / K8DS Series

DIN 22.5/17.5 Size Lineup of A Wide Range of Measuring and Monitoring Relays

K8AK-AS Single-phase Current Relay

Setting range Supply voltage Model
2 to 20 mA AC/DC,
10 to 100 mA AC/DC
50 to 500 mA AC/DC
24 VAC/DC K8AK-AS1 24 VAC/DC
100 to 240 VAC K8AK-AS1 100-240 VAC
0.1 to 1 A AC/DC,
0.5 to 5 A AC/DC,
0.8 to 8 A AC/DC
24 VAC/DC K8AK-AS2 24 VAC/DC
100 to 240 VAC K8AK-AS2 100-240 VAC
10 to 100 A AC *,
20 to 200 A AC *
24 VAC/DC K8AK-AS3 24 VAC/DC
100 to 240 VAC K8AK-AS3 100-240 VAC

* The K8AK-AS3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT).
    (Direct input is not possible.)

Accessory (Order Separately)

OMRON CT

Appearance Input range Applicable Relay Model
3239_lu_2_1
10 to 100 A AC,
20 to 200 A AC
K8AK-AS3 K8AC-CT200L

Commercially Available CTs *

Appearance CT current on secondary side Applicable Relay
3239_lu_3_1
0 to 1 A AC,
0 to 5 A AC
K8AK-AS2

* If you use a commercially available CT, do not exceed the overload capacity of the K8AK-AS2.

K8AK-AW Single-phase Overcurrent/Undercurrent Relays

Setting range Supply voltage Model
2 to 20 mA AC/DC
10 to 100 mA AC/DC
50 to 500 mA AC/DC
24 VAC/DC K8AK-AW1 24 VAC/DC
100 to 240 VAC K8AK-AW1 100-240 VAC
0.1 to 1 A AC/DC
0.5 to 5 A AC/DC
24 VAC/DC K8AK-AW2 24 VAC/DC
100 to 240 VAC K8AK-AW2 100-240 VAC
10 to 100 A AC *
20 to 200 A AC *
24 VAC/DC K8AK-AW3 24 VAC/DC
100 to 240 VAC K8AK-AW3 100-240 VAC

* The K8AK-AW3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT).
    (Direct input is not possible.)

Accessory (Order Separately)

OMRON CT

Appearance Input range Applicable Relay Model
3239_lu_5_1
10 to 100 A AC,
20 to 200 A AC
K8AK-AW3 K8AC-CT200L

Commercially Available CTs *

Appearance CT current on secondary side Applicable Relay
3239_lu_6_1
0 to 1 A AC,
0 to 5 A AC
K8AK-AW2

* If you use a commercially available CT, do not exceed the overload capacity of the K8AK-AW2.

K8AK-VS Single-phase Voltage Relay

Setting range Control power supply voltage Model
1 to 10 V AC/DC
3 to 30 V AC/DC
15 to 150 V AC/DC
24 VAC/DC K8AK-VS2 24 VAC/DC
100 to 240 VAC K8AK-VS2 100-240 VAC
20 to 200 V AC/DC
30 to 300 V AC/DC
60 to 600 V AC/DC
24 VAC/DC K8AK-VS3 24 VAC/DC
100 to 240 VAC K8AK-VS3 100-240 VAC

K8AK-VW Single-phase Overvoltage/Undervoltage Relays

Setting range Supply voltage Model
1 to 10 V AC/DC
3 to 30 V AC/DC
15 to 150 V AC/DC
24 VAC/DC K8AK-VW2 24 VAC/DC
100 to 240 VAC K8AK-VW2 100 to 240 VAC
20 to 200 V AC/DC
30 to 300 V AC/DC
60 to 600 V AC/DC
24 VAC/DC K8AK-VW3 24 VAC/DC
100 to 240 VAC K8AK-VW3 100 to 240 VAC

K8DS-PH Phase-sequence Phase-loss Relay

Function Rated input voltage * Relay output Model
Phase sequence and phase loss monitoring 3-phase, 3-wire 200 to 480 VAC SPDT × 1 K8DS-PH1

* The power supply is shared with the rated input voltage.

K8AK-PH Phase-sequence Phase-loss Relay

Function Rated input voltage * Relay output Model
Phase sequence and phase loss monitoring 3-phase, 3-wire 200 to 480 VAC DPDT ×1 K8AK-PH1

* The power supply is shared with the rated input voltage.

K8AK-PW Three-phase Voltage Relay

Rated input * Model
3-phase 3-wire mode 200, 220, 230, 240 VAC K8AK-PW1
3-phase 4-wire mode 115, 127, 133, 138 VAC
3-phase 3-wire mode 380, 400, 415, 480 VAC K8AK-PW2
3-phase 4-wire mode 220, 230, 240, 277 VAC

Note: Three-phase, three-wire or four-wire and the input range are switched using a DIP switch.
* The power supply voltage is the same as the rated input voltage.

K8AK-PM Three-phase Phase-sequence Phase-loss Relay

Rated input * Model
3-phase 3-wire mode 200, 220, 230, 240 VAC K8AK-PM1
3-phase 4-wire mode 115, 127, 133, 138 VAC
3-phase 3-wire mode 380, 400, 415, 480 VAC K8AK-PM2
3-phase 4-wire mode 220, 230, 240, 277 VAC

Note: Three-phase 3-wire or 4-wire and the input range are switched using a DIP switch.
* The power supply is shared with the rated input voltage.

K8AK-PA Three-phase Asymmetry and Phase-sequence Phase-loss Relay

Rated input * Model
3-phase 3-wire mode 200, 220, 230, 240 VAC K8AK-PA1
3-phase 4-wire mode 115, 127, 133, 138 VAC
3-phase 3-wire mode 380, 400, 415, 480 VAC K8AK-PA2
3-phase 4-wire mode 220, 230, 240, 277 VAC

Note: Three-phase, three-wire or four-wire and the input range are switched using a DIP switch.
* The power supply voltage is the same as the rated input voltage.

K8AK-TH Temperature Monitoring Relay

K8AK-TH (Temperature Input Models)

Power
supply
Type Output
relays
Input types Setting units
(setting range)
Model
100 to
240 VAC
Temperature
input
1 relay Thermocouple or platinum
resistance thermometer
Setting unit: 1°C or 1°F
(0 to 999°C/°F)
K8AK-TH11S 100-240VAC
Thermocouple Setting unit: 10°C/°F * K8AK-TH12S 100-240VAC
24 VAC/DC Thermocouple or platinum
resistance thermometer
Setting unit: 1°C or 1°F
(0 to 999°C/°F)
K8AK-TH11S 24VAC/DC
Thermocouple Setting unit: 10°C/°F * K8AK-TH12S 24VAC/DC

* Refer to Setting Ranges on Catalog for the setting ranges.
Note: When ordering, designate the power supply specification. Different Relay models are used for 100 to 240 VAC and 24 VAC/VDC.

K8AK-LS Conductive Level Controller

Power supply voltage Model
24 VAC/DC K8AK-LS1 24 VAC/DC
100 to 240 VAC K8AK-LS1 100-240 VAC

Accessories (Order Separately)

Electrode Holders/Underwater Electrodes

Application For general-
purpose use,
such as water
supply lines
For areas
with limited
space
For liquids
with low
resistance
When
mounting
strength
is required
For
resistance
to high-
temperature
or high-
pressure
liquids
For
resistance
against
corrosion
For
installation
at long
distances
from the
liquid level
Model PS-3S/-4S/-5S
(2-wire models
are also
available)
PS-31
SUS304,
300 mm
BF-1 BF-3/-5 BS-1 BS-1T PH-1/-2
Appearance
3239_lu_16_1
3239_lu_16_2
3239_lu_16_3
3239_lu_16_4
3239_lu_16_5
3239_lu_16_6
3239_lu_16_7

Electrode Rods

Electrode Rods are available in sets with the connection nuts, lock nuts, and tightening screws.

K8AK / K8DS Series Lineup 42

Application Purified water service, industrial water, and sewage Purified water service, industrial water, sewage, and
weak alkaline solutions
Model F03-60 SUS304 F03-60 SUS316

Others

Item Model
Protective Cover
(Electrode Holders for the PS or BF Series)
3239_lu_18_1
F03-11
Mounting Piece (Electrode Holder for the PS Series)
3239_lu_18_2
F03-12
Separator (to prevent contact between electrodes)
3239_lu_18_3
F03-14 1P (one pole)
F03-14 3P (three poles)
F03-14 5P (five poles)