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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.

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

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

Other CTs

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
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 Series Lineup 9

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
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 Series Lineup 13

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-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
3-phase 3-wire mode 380, 400, 415, 480 VAC K8AB-PM2
3-phase 4-wire mode 220, 230, 240, 277 VAC

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
3-phase 3-wire mode AC 380, 400, 415, 480 K8AB-PA2
3-phase 4-wire mode AC 220, 230, 240, 277

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

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
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
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.