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New Product

Single-phase Overcurrent/Undercurrent Relay

K8DT-AW

Detect errors in motors and other equipment 
through current changes.
Monitor for overcurrents and undercurrents 
simultaneously with one Relay.

• Monitor AC or DC currents with one Relay.

• Use with commercially available CTs (CT secondary side: 0 to 1 A or 0 to 5 A).

• Width of 17.5 mm to reduce space required in panels.

• Push-In Plus Technology that reduce wiring work.

Double-insertion holes for crossover wiring (all terminals).

• UL listed for easy shipping to North America.

• Models added with transistor outputs for superior contact reliability.

• RoHS compliant.

Ordering Information

Single-phase Overcurrent/Undercurrent Relay

*

The K8DT-AW3

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 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT). (Direct input is not possible.)

OMRON CT

Commercially Available CTs

 *

*

If you use a commercially available CT, do not exceed the overload 
capacity of the K8DT-AW2.

Options (Order Separately)

Front Cover

Refer to 

Safety Precautions

 on page 10.

Refer to page 9 for commonly asked questions.

Setting range

Power supply voltage

Output

Model

2 to 20 mA AC/DC

10 to 100 mA AC/DC
50 to 500 mA AC/DC

24 VAC/DC

Relay: SPDT contact output

K8DT-AW1CD

Transistor: Open collector

K8DT-AW1TD

100 to 240 VAC

Relay: SPDT contact output

K8DT-AW1CA

Transistor: Open collector

K8DT-AW1TA

0.1 to 1 A AC/DC
0.5 to 5 A AC/DC

24 VAC/DC

Relay: SPDT contact output

K8DT-AW2CD

Transistor: Open collector

K8DT-AW2TD

100 to 240 VAC

Relay: SPDT contact output

K8DT-AW2CA

Transistor: Open collector

K8DT-AW2TA

10 to 100 A AC 

*

20 to 200 A AC 

*

24 VAC/DC

Relay: SPDT contact output

K8DT-AW3CD

Transistor: Open collector

K8DT-AW3TD

100 to 240 VAC

Relay: SPDT contact output

K8DT-AW3CA

Transistor: Open collector

K8DT-AW3TA

For the most recent information on models 
that have been certified for safety 
standards, refer to your OMRON website.

Appearance

Input range

Applicable 

Relay

Model

10 to 100 A AC, 

20 to 200 A AC

K8DT-AW3

K8AC-CT200L

Appearance

CT current on 

secondary side

Applicable Relay

0 to 1 A AC,

0 to 5 A AC

K8DT-AW2

Appearance

Model

Y92A-D1A

Summary of Contents for K8DT-AW Series

Page 1: ...tions Order Separately Front Cover Refer to Safety Precautions on page 10 Refer to page 9 for commonly asked questions Setting range Power supply voltage Output Model 2 to 20 mA AC DC 10 to 100 mA AC...

Page 2: ...COM 2 to 20 mA AC DC Approx 5 Direct input Continuous input at 120 of maximum input 1 s at 150 100 mA AC DC I2 COM 10 to 100 mA AC DC Approx 1 500 mA AC DC I3 COM 50 to 500 mA AC DC Approx 0 2 K8DT AW...

Page 3: ...5 to 1 5 mm2 AWG24 to AWG16 Wire insertion force 8 N max for AWG20 wire Screwdriver insertion force 15 N max Wire stripping length 8 mm Ferrule length 8 mm Current capacity 10 A per pole Number of ins...

Page 4: ...copper wires with a rating of 75 C or an equivalent rating 1 Current Input AW1 3 Power Supply Voltage A 100 to 240 VAC D 24 VAC DC No polarity 500 mA max 20 mA max 100 mA max AW2 AW3 CT 100 A max CT...

Page 5: ...AL1 alarm indicator AL2 alarm indicator Contacts 11 14 or transistor output Overcurrent set value AL2 Overcurrent set value AL1 Input Power supply voltage LOCK t t LOCK Startup lock time 0 to 30 s t O...

Page 6: ...pen the DIP switch cover to set the DIP switch Keep the DIP switch cover closed while the power supply to the Relay is ON Model Setting range Input type Wiring connections K8DT AW1 2 to 20 mA AC DC Di...

Page 7: ...ating Time The operating time is set using the operating time knob T The operating time can be set to between 0 1 and 30 s If the input current exceeds drops lower than the set value the alarm indicat...

Page 8: ...5 13 5 86 54 63 11 4 7 Four M4 6 screws 17 20 9 3 1 7 1 7 9 3 76 OMRON CT K8AC CT200L Mounting Hole Dimensions Note The OMRON Current Transformer CT is designed to be used with the K8DT AW3 Use termin...

Page 9: ...tely 30 A The startup current will exceed the overload capacity rating 150 for 1 s of the K8DT AW1 and K8DT AW2 and result in failure of the Relay To monitor the motor load use the K8DT AW3 Overload c...

Page 10: ...ails monitoring and alarm outputs may fail to operate This may result in physical damage to the facilities equipment or other devices that are connected to it To reduce this risk inspect the Relay reg...

Page 11: ...supply power to the product 22 Do not install the product immediately next to heat sources 23 Perform periodic maintenance 24 Do not wire anything to the release holes 25 When you insert a flat blade...

Page 12: ...rom the release hole Checking Connections After the insertion pull gently on the wire to make sure that it will not come off and the wire is securely fastened to the terminal block To prevent short ci...

Page 13: ...re is basic insulation between the power supply terminals and input terminals There is basic insulation between the power supply terminals and output terminals There is basic insulation between the in...

Page 14: ...MEMO 14...

Page 15: ...CONNECTED WITH THE PRODUCTS WHETHER SUCH CLAIM IS BASED IN CONTRACT WARRANTY NEGLIGENCE OR STRICT LIABILITY Further in no event shall liability of Omron Companies exceed the individual price of the Pr...

Page 16: ...IL 60169 U S A Tel 1 847 843 7900 Fax 1 847 843 7787 Regional Headquarters OMRON EUROPE B V Wegalaan 67 69 2132 JD Hoofddorp The Netherlands Tel 31 2356 81 300 Fax 31 2356 81 388 Contact www ia omron...

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