1
Single-phase Current Relay
K8AK-AS
Ideal for current monitoring for
industrial facilities and equipment.
• Monitor for overcurrents or undercurrents.
• Use commercially available CTs (CT current on secondary
side: 0 to 1 A or 0 to 5 A).
• Manual resetting and automatically resetting supported by one
Relay.
• Startup lock and operating time can be set separately.
• One SPDT output relay, 5 A at 250 VAC (resistive load).
• Output relay can be switched between normally open and
normally closed.
• Output status can be monitored using LED indicator.
• Inputs are isolated from the power supply.
Ordering Information
List of Models
*1 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
●
Commercially Available CTs*
* If you use a commercially available CT, do not exceed the overload
capacity of the K8AK-AS2.
Refer to
Safety Precautions for the K8AK Series
on page 86.
Refer to page 13 for commonly asked questions.
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
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
Appearance
Input range
Applicable
Relay
Model
10 to 100 A AC,
20 to 200 A AC K8AK-AS3
K8AC-CT200L
Appearance
CT current on secondary
side
Applicable Relay
0 to 1 A AC,
0 to 5 A AC
K8AK-AS2
