Industrial Automation

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

last update: September 5, 2013

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
2 to 20 mA AC/DC, 10 to 100 mA AC/DC 50 to 500 mA AC/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
0.1 to 1 A AC/DC, 0.5 to 5 A AC/DC, 0.8 to 8 A AC/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
10 to 100 A AC , 20 to 200 A AC	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
	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
	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
2 to 20 mA AC/DC 10 to 100 mA AC/DC 50 to 500 mA AC/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
0.1 to 1 A AC/DC 0.5 to 5 A AC/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
10 to 100 A AC * 20 to 200 A AC *	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
	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
	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
1 to 10 V AC/DC 3 to 30 V AC/DC 15 to 150 V AC/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
20 to 200 V AC/DC 30 to 300 V AC/DC 60 to 600 V AC/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
1 to 10 V AC/DC 3 to 30 V AC/DC 15 to 150 V AC/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
20 to 200 V AC/DC 30 to 300 V AC/DC 60 to 600 V AC/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	K8AK-PW1
3-phase 3-wire mode	380, 400, 415, 480 VAC	K8AK-PW2
3-phase 4-wire mode	220, 230, 240, 277 VAC	K8AK-PW2

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	K8AK-PM1
3-phase 3-wire mode	380, 400, 415, 480 VAC	K8AK-PM2
3-phase 4-wire mode	220, 230, 240, 277 VAC	K8AK-PM2

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	K8AK-PA1
3-phase 3-wire mode	380, 400, 415, 480 VAC	K8AK-PA2
3-phase 4-wire mode	220, 230, 240, 277 VAC	K8AK-PA2

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
100 to 240 VAC			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
24 VAC/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

Electrode Rods

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

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)		F03-11
Mounting Piece (Electrode Holder for the PS Series)		F03-12
Separator (to prevent contact between electrodes)		F03-14 1P (one pole) F03-14 3P (three poles) F03-14 5P (five poles)

last update: September 5, 2013

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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

Accessory (Order Separately)

OMRON CT

Commercially Available CTs *

K8AK-AW Single-phase Overcurrent/Undercurrent Relays

Accessory (Order Separately)

OMRON CT

Commercially Available CTs *

K8AK-VS Single-phase Voltage Relay

K8AK-VW Single-phase Overvoltage/Undervoltage Relays

K8DS-PH Phase-sequence Phase-loss Relay

K8AK-PH Phase-sequence Phase-loss Relay

K8AK-PW Three-phase Voltage Relay

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

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

K8AK-TH Temperature Monitoring Relay

K8AK-TH (Temperature Input Models)

K8AK-LS Conductive Level Controller

Accessories (Order Separately)

Electrode Holders/Underwater Electrodes

Electrode Rods

Others

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