Industrial Automation

Discontinued On Mar. 2015

K8AB Series

Measuring and Monitoring Relays

K8AB Series

Eight slim models featuring a variety of innovative new functions

* Information in this page is a reference that you created on the basis of information in the product catalog before the end of production, may be different from the current situation, such as goods for / supported standards options / price / features of the product. Before using, please check the compatibility and safety system.

last update: October 11, 2012

K8AB-AS
Single-phase Current Relay

Single-phase Current Relay	Measuring current	Supply voltage	Model
	2 to 20 mA AC/DC, 10 to 100 mA AC/DC, 50 to 500 mA AC/DC	24 VAC/DC	K8AB-AS1 24 VAC/DC
		100-115 VAC	K8AB-AS1 100-115 VAC
		200-230 VAC	K8AB-AS1 200-230 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	K8AB-AS2 24 VAC/DC
		100-115 VAC	K8AB-AS2 100-115 VAC
		200-230 VAC	K8AB-AS2 200-230 VAC
	10 to 100 A AC, 20 to 200 A AC (See note.)	24 VAC/DC	K8AB-AS3 24 VAC/DC
		100-115 VAC	K8AB-AS3 100-115 VAC
		200-230 VAC	K8AB-AS3 200-230 VAC

Note: The K8AB-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

	10 to 100 A AC, 20 to 200 A AC	K8AB-AS3	K8AC-CT200L
Current Transformer	Input range	Applicable Relay	Model
	10 to 100 A AC, 20 to 200 A AC	K8AB-AS3	K8AC-CT200L

Other CTs

0 to 1 A AC, 0 to 5 A AC	K8AB-AS2
CT current on secondary side	Applicable Relay
0 to 1 A AC, 0 to 5 A AC	K8AB-AS2

K8AB-VS
Single-phase Voltage Relay

Single-phase Voltage Relay	Measuring voltage	Supply voltage	Model
	6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC	24 VAC/DC	K8AB-VS1 24 VAC/DC
		100-115 VAC	K8AB-VS1 100-115 VAC
		200-230 VAC	K8AB-VS1 200-230 VAC
	1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC	24 VAC/DC	K8AB-VS2 24 VAC/DC
		100-115 VAC	K8AB-VS2 100-115 VAC
		200-230 VAC	K8AB-VS2 200-230 VAC
	20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC	24 VAC/DC	K8AB-VS3 24 VAC/DC
		100-115 VAC	K8AB-VS3 100-115 VAC
		200-230 VAC	K8AB-VS3 200-230 VAC

Shunts (Order Separately)

A shunt is a resistor to convert a DC current into a DC voltage.
Use the shunt in combination with K8AB-VS to detect undercurrent and overcurrent in DC circuits.

Model	Rated current	Output voltage
SDV-SH5	5 A	60 mV
SDV-SH7.5	7.5 A	60 mV
SDV-SH7.5	7.5 A (for 100 mV)	100 mV
SDV-SH10	10 A	60 mV
SDV-SH15	15 A
SDV-SH20	20 A
SDV-SH30	30 A
SDV-SH50	50 A
SDV-SH75	75 A
SDV-SH100	100 A
SDV-SH150	150 A
SDV-SH200	200 A
SDV-SH300	300 A
SDV-SH500	500 A
SDV-SH750	750 A
SDV-SH1000	1,000 A

Characteristics
SDV-SH5A (Rated Current: 5 A)

Note: 1. All the above listed shunts have an accuracy in the 1.0 class.
2. Select a shunt whose rated current is more than 120% of the current
normally flowing in a circuit. The characteristics of the shunt may change
or fusing of a resistor element may occur if an overload that is 1,000%
of the rated current is applied. Therefore, determine the rated current of
the shunt to be used, by taking the circuit conditions into account.

K8AB-VW
Single-phase Voltage Relay

Single-phase Voltage Relay	Measuring voltage	Supply voltage	Model
	6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC	24 VAC/DC	K8AB-VW1 24 VAC/DC
		100-115 VAC	K8AB-VW1 100-115 VAC
		200-230 VAC	K8AB-VW1 200-230 VAC
	1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC	24 VAC/DC	K8AB-VW2 24 VAC/DC
		100-115 VAC	K8AB-VW2 100-115 VAC
		200-230 VAC	K8AB-VW2 200-230 VAC
	20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC	24 VAC/DC	K8AB-VW3 24 VAC/DC
		100-115 VAC	K8AB-VW3 100-115 VAC
		200-230 VAC	K8AB-VW3 200-230 VAC

Shunts (Order Separately)

A shunt is a resistor to convert a DC current into a DC voltage.
Use the shunt in combination with K8AB-VW to detect undercurrent and overcurrent in DC circuits.

Model	Rated current	Output voltage
SDV-SH5	5 A	60 mV
SDV-SH7.5	7.5 A	60 mV
SDV-SH7.5	7.5 A (for 100 mV)	100 mV
SDV-SH10	10 A	60 mV
SDV-SH15	15 A
SDV-SH20	20 A
SDV-SH30	30 A
SDV-SH50	50 A
SDV-SH75	75 A
SDV-SH100	100 A
SDV-SH150	150 A
SDV-SH200	200 A
SDV-SH300	300 A
SDV-SH500	500 A
SDV-SH750	750 A
SDV-SH1000	1,000 A

Characteristics
SDV-SH5A (Rated Current: 5 A)

K8AB-PH
Phase-sequence Phase-loss Relay

Phase-sequence Phase-loss Relay	Functions	Rated input voltage *	Model
	Phase sequence and phase loss monitoring	200 to 500 VAC	K8AB-PH1

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

K8AB-PM
Three-phase Phase-sequence Phase-loss Relay

Three-phase Phase-sequence Phase-loss Relay	Rated input (See note 2.)		Model
	3-phase 3-wire mode	200, 220, 230, 240 VAC	K8AB-PM1
	3-phase 4-wire mode	115, 127, 133, 138 VAC	K8AB-PM1
	3-phase 3-wire mode	380, 400, 415, 480 VAC	K8AB-PM2
	3-phase 4-wire mode	220, 230, 240, 277 VAC	K8AB-PM2

Note: 1. Three-phase 3-wire or 4-wire and the input range are switched using a DIP switch.
2. The power supply is shared with the rated input voltage.

K8AB-PA
Three-phase Asymmetry and Phase-sequence Phase-loss Relay

Three-phase Asymmetry and Phase-sequence Phase-loss Relay	Rated input (See note 2.)		Model
	3-phase 3-wire mode	AC 200, 220, 230, 240	K8AB-PA1
	3-phase 4-wire mode	AC 115, 127, 133, 138	K8AB-PA1
	3-phase 3-wire mode	AC 380, 400, 415, 480	K8AB-PA2
	3-phase 4-wire mode	AC 220, 230, 240, 277	K8AB-PA2

Note: 1. Three-phase, three-wire or four-wire and the input range are switched using a DIP switch.
2. The power supply voltage is the same as the rated input voltage.

K8AB-PW
Three-phase Voltage Relay

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	K8AB-PW1
	3-phase 3-wire mode	380, 400, 415, 480 VAC	K8AB-PW2
	3-phase 4-wire mode	220, 230, 240, 277 VAC	K8AB-PW2

Note: 1. Three-phase, three-wire or four-wire and the input range are switched using a DIP switch.
2. The power supply voltage is the same as the rated input voltage.

K8AB-TH
Temperature Monitoring Relay

Size	Supply voltage	Type	Number of outputs	Input type	Setting unit (setting range)	Model
K8AB-TH 22.5 × 90 × 100 mm	100 to 240 VAC	Temper- ature input	1 (relay)	Thermocouple/Pt100	Unit: 1°C/°F (0 to 399°C/°F)	K8AB-TH11S
	100 to 240 VAC			Thermocouple	Unit: 10°C/°F (See note 1.)	K8AB-TH12S
	24 VAC/ VDC			Thermocouple/Pt100	Unit: 1°C/°F (0 to 399°C/°F)	K8AB-TH11S
	24 VAC/ VDC			Thermocouple	Unit: 10°C/°F (See note 1.)	K8AB-TH12S

Note: 1. Refer to Catalog for setting ranges.
2. Specify the power supply voltage when ordering. Different models must be ordered for 100 to 240 VAC and 24
VAC/DC.

last update: October 11, 2012

Product Category

Power Supplies / In Addition
- Measuring / Motor Protective Relays
  - Discontinued
    - K8AB Series

Top of page

K8AB Series

Eight slim models featuring a variety of innovative new functions

K8AB-ASSingle-phase Current Relay

Accessory (Order Separately)

OMRON CT

Other CTs

K8AB-VSSingle-phase Voltage Relay

Shunts (Order Separately)

Characteristics SDV-SH5A (Rated Current: 5 A)

K8AB-VWSingle-phase Voltage Relay

Shunts (Order Separately)

Characteristics SDV-SH5A (Rated Current: 5 A)

K8AB-PHPhase-sequence Phase-loss Relay

K8AB-PMThree-phase Phase-sequence Phase-loss Relay

K8AB-PAThree-phase Asymmetry and Phase-sequence Phase-loss Relay

K8AB-PWThree-phase Voltage Relay

K8AB-THTemperature Monitoring Relay

Product Category

K8AB-AS
Single-phase Current Relay

K8AB-VS
Single-phase Voltage Relay

Characteristics
SDV-SH5A (Rated Current: 5 A)

K8AB-VW
Single-phase Voltage Relay

Characteristics
SDV-SH5A (Rated Current: 5 A)

K8AB-PH
Phase-sequence Phase-loss Relay

K8AB-PM
Three-phase Phase-sequence Phase-loss Relay

K8AB-PA
Three-phase Asymmetry and Phase-sequence Phase-loss Relay

K8AB-PW
Three-phase Voltage Relay

K8AB-TH
Temperature Monitoring Relay