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New Product

Single-phase Current Relay

K8DT-AS

Detect errors in motors and other equipment 
through current changes.
Use in either overcurrent or undercurrent mode.

• 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).
• Settings for the operating value, hysteresis, startup lock time, and operating time.
• Width of 17.5 mm to reduce space required in panels.
• Push-In Plus Terminal that reduce wiring work.

The use of cage clamps enables wiring with bare stranded wires.
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.

Ordering Information

Single-phase Current Relay

*

The K8DT-AS3

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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-AS2.

Options (Order Separately)

Front Cover

Refer to 

Safety Precautions

 on page 10. 

Refer to page 9 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

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-AS1CD

Transistor

K8DT-AS1TD

100 to 240 VAC

Relay: SPDT contact output

K8DT-AS1CA

Transistor

K8DT-AS1TA

0.1 to 1 A AC/DC, 

0.5 to 5 A AC/DC

24 VAC/DC

Relay: SPDT contact output

K8DT-AS2CD

Transistor

K8DT-AS2TD

100 to 240 VAC

Relay: SPDT contact output

K8DT-AS2CA

Transistor

K8DT-AS2TA

10 to 100 A AC 

*

20 to 200 A AC 

*

 

24 VAC/DC

Relay: SPDT contact output

K8DT-AS3CD

Transistor

K8DT-AS3TD

100 to 240 VAC

Relay: SPDT contact output

K8DT-AS3CA

Transistor

K8DT-AS3TA

Appearance

Input range

Applicable 

Relay

Model

10 to 100 A AC, 

20 to 200 A AC

K8DT-AS3

K8AC-CT200L

Appearance

CT current on secondary 

side

Applicable Relay

0 to 1 A AC,

0 to 5 A AC

K8DT-AS2

Appearance

Model

Y92A-D1A

Summary of Contents for K8DT-AS Series

Page 1: ...ommercially available CT do not exceed the overload capacity of the K8DT AS2 Options Order Separately Front Cover Refer to Safety Precautions on page 10 Refer to page 9 for commonly asked questions Fo...

Page 2: ...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 Direct input 500 mA AC DC I3 COM 50 to 500 mA AC DC Approx 0 2 Direct input...

Page 3: ...Wire insertion force 8 N max for AWG20 wire Screwdriver insertion force 15 N max Wire stripping length 8 mm Ferrule length 8 mm Recommended flat blade screwdriver XW4Z 00B Omron SZF 0 4 2 5 Phoenix Co...

Page 4: ...copper wires with a rating of 75 C or an equivalent rating Inside Inside 1 Current Input AS1 2 Output C Relay Output T Transistor Output 3 Power Supply Voltage A 100 to 240 VAC D 24 VAC DC No polarit...

Page 5: ...1 s Power supply voltage Contacts 11 12 Set value Alarm indicator Lit Contacts 11 14 or transistor output Input Delay time 250 ms reference value Terminal block See note Terminal block See note Curren...

Page 6: ...itch 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 AS1 2 to 20 mA AC DC Direct input I1...

Page 7: ...et Value SV of 50 and Overcurrent Operation Operation will be at 100 A and resetting at 90 A when the hysteresis HYS is set to 10 Operating Time The operating time is set using the operating time knob...

Page 8: ...3 1 7 1 7 9 3 76 Two M5 screw holes or two 5 5 dia holes OMRON CT K8AC CT200L Mounting Hole Dimensions Note The OMRON Current Transformer CT is designed to be used with the K8DT AS3 Use terminals k an...

Page 9: ...ely 30 A The startup current will exceed the overload capacity rating 150 for 1 s of the K8DT AS1 and K8DT AS2 and result in failure of the Relay To monitor the motor load use the K8DT AS3 Overload ca...

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: ...ck the wiring before you 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...

Page 12: ...e flat blade screwdriver from 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...

Page 13: ...n and other factors There 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 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: ...9 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 com Kyo...

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