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2
Single-phase Current Relay
K8AB-AS
Cat. No. N142-E1-02
Ordering Information
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List of Models
Note: 1.
Models with a 24-VDC power supply have a non-isolated power supply.
The inputs and power supply are connected internally, so a malfunction may occur due to an unwanted current path if the inputs and
power supply are connected to the same line.
If an unwanted current path exists, use a K8AB AC Power Supply or isolate with an external power supply.
2.
The K8AB-AS3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT). (Direct input is not
possible.)
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Accessory (Order Separately)
OMRON CT
Other CTs
Ratings and Specifications
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Input Range
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 VDC, not insulated
K8AB-AS1 24 VDC (See note 1.)
24 VAC, insulated
K8AB-AS1 24 VAC
100-115 VAC, insulated
K8AB-AS1 100-115 VAC
200-230 VAC, insulated
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 VDC, not insulated
K8AB-AS2 24 VDC (See note 1.)
24 VAC, insulated
K8AB-AS2 24 VAC
100-115 VAC, insulated
K8AB-AS2 100-115 VAC
200-230 VAC, insulated
K8AB-AS2 200-230 VAC
10 to 100 A AC,
20 to 200 A AC
(See note 2.)
24 VDC, not insulated
K8AB-AS3 24 VDC (See note 1.)
24 VAC, insulated
K8AB-AS3 24 VAC
100-115 VAC, insulated
K8AB-AS3 100-115 VAC
200-230 VAC, insulated
K8AB-AS3 200-230 VAC
Current Transformer
Input range
Applicable Relay
Model
10 to 100 A AC,
20 to 200 A AC
K8AB-AS3
K8AC-CT200L
CT current on secondary side
Applicable Relay
0 to 1 A AC,
0 to 5 A AC
K8AB-AS2
Model
Range
Connection terminal
Input impedance
Overload capacity
K8AB-AS1
2 to 20 mA AC/DC
I1-COM
Approx. 5
Ω
120% max. input continuous
150% max. input for 1 s
10 to 100 mA AC/DC I2-COM
Approx. 1
Ω
50 to 500 mA AC/DC I3-COM
Approx. 0.2
Ω
K8AB-AS2
0.1 to 1 A AC/DC
I1-COM
Approx. 0.12
Ω
(load: 0.5 VA)
0.5 to 5 A AC/DC
I2-COM
Approx. 0.02
Ω
(load: 1.5 VA)
0.8 to 8 A AC/DC
I3-COM
Approx. 0.02
Ω
(load: 3 VA)
K8AB-AS3
10 to 100 A AC
I2-COM
Uses commercial CT
120% max. input continuous
200% max. input for 30 s
600% max. input for 1 s
20 to 200 A AC
I3-COM
Uses commercial CT