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K8DT-AS

7

Setting Method

Setting Current

The current knob (SV) is used to set the current.
The current can be set to 10% to 100% of the maximum setting range.
Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the 
same level.)
Use this as a guide to set the current.
The maximum setting range will differ depending on the model and the input terminal.
Example: K8DT-AS3 Using Input Terminals I3-COM
The maximum setting range will be 200 A AC and the setting range will be 20 to 200 A.

Hysteresis

Hysteresis is set using the hysteresis knob (HYS)
The setting range is 5 to 50% of the operating value.
Example: Maximum of 200 A AC, Current Set 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 (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 indicator will start flashing for the set period and then stay lit.

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.
The startup lock time will start when the input current reaches 30% or more of the set value.
Use startup lock time to prevent unwanted operation, e.g., as a result of inrush current.

Note:

This function is valid only for overcurrent operation.

Errors are not detected 
during this time.

Startup lock time

Startup lock timer start

30% of current 

set value

Current set value

Inrush current

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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