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Cat. No. N142-E1-02

 

Single-phase Current Relay

 K8AB-AS

1

Single-phase Current Relay

K8AB-AS

Ideal for current monitoring for industrial 
facilities and equipment.

• Monitor for overcurrents or undercurrents.

• Manual resetting and automatically resetting supported by one 

Relay.

• Startup lock and operating time can be set separately.

• One SPDT output relay, 6 A at 250 VAC (resistive load).

• Output relay can be switched between normally open and 

normally closed.

• Process control signal (4 to 20 mA) supported.

• Commercial CT input signal (0 to 1 A, 0 to 5 A) supported.

• Output status can be monitored using LED indicator.

Model Number Structure

Model Number Legend

1. Basic Model

K8AB: Measuring and Monitoring Relays

2. Functions

AS:

Single-phase Current Relay (One-sided operation)

3. Measuring Current

1:

2 to 20 mA AC/DC, 10 to 100 mA AC/DC, 50 to 500 mA AC/DC

2:

0.1 to 1 A AC/DC, 0.5 to 5 A AC/DC, 0.8 to 8 A AC/DC

3:

10 to 100 A AC, 20 to 200 A AC (See note.)

Note:

The K8AB-AS3 is specially designed to be used in combination with the OMRON K8AC-CT200L Current Transformer (CT). (Direct input is 
not possible.)

4. Supply Voltage

24 VDC:

24 VDC

24 VAC:

24 VAC

100-115 VAC: 100 to 115 VAC
200-230 VAC: 200 to 230 VAC

1

2 3

4

K8AB-

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Summary of Contents for K8AB-AS

Page 1: ...Commercial CT input signal 0 to 1 A 0 to 5 A supported Output status can be monitored using LED indicator Model Number Structure Model Number Legend 1 Basic Model K8AB Measuring and Monitoring Relays...

Page 2: ...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...

Page 3: ...ely 30 or more of the set value Note Enabled only for overcurrent operation Indicators Power PWR Green Relay output RY Yellow Alarm outputs ALM Red Input impedance Refer to the Input Range on the prev...

Page 4: ...luence Operating value Based on ambient humidity of 65 25 to 80 5 max Operating time Based on ambient room humidity 25 to 80 10 max Influence of power supply voltage Operating value 5 max Operating ti...

Page 5: ...current path if the inputs and power supply are connected to the same line T LOCK Hysteresis 5 to 50 of operating value Lit Flashing T Operating time 0 1 to 30 s Lock Startup lock time 0 to 30 s Oper...

Page 6: ...K Alarm indicator Terminal block See notes 1 and 2 Terminal block See notes 1 and 2 Item Meaning Power indicator PWR Green Lit when power is being supplied Relay status indicator RY Yellow Lit when re...

Page 7: ...method relay drive method and operating mode are set using the DIP switch located on the bottom of the Unit K8AB AS does not use SW1 Setting Method 1 Setting Current The current knob SV is used to se...

Page 8: ...for the set period and then stay lit 4 Startup Lock Time The startup lock time is set using the startup lock time knob LOCK The startup lock time can be set to between 0 and 30 s Turn the knob while t...

Page 9: ...s 2 Make sure to use setting values appropriate for the controlled object Failure to do so can cause unintended operation and may result in accident or corruption of the product 3 Do not use thinner o...

Page 10: ...ply are connected internally so the K8AB AS will not operate normally if an unwanted current path exists If an unwanted current path exists use a K8AB model with an AC power supply or use an isolated...

Page 11: ...rating value 25 operating time 0 1 s startup lock timer 0 1 to 30 s set according to the duration of the startup current The K8AB AS3 can be set to between 10 to 100 of the rated current 10 A to 100 A...

Page 12: ...ice of the product on which liability is asserted IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY REPAIR OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS OMRON S ANALYSIS CONFIRMS THAT THE PRODUCTS W...

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