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New Product

Three-phase Voltage and Phase-sequence Phase-loss Relay

K8DT-PM

Protect motors and other equipment from unstable 
voltages in the power supply system.
Protect motors and other equipment by detecting 
overvoltages, undervoltages, phase sequence, and 
phase loss for three-phase power supplies.

• Phase loss detection while the motor is operating.

• Widely applies 3-phase 3-wire system. (Changed with a DIP switch.)

• Greater resistance to inverter noise.

• 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.

• Certification is pending for LR standards.

• Models added with transistor outputs for superior contact reliability.

• RoHS compliant.

Ordering Information

Three-phase Voltage and Phase-sequence Phase-loss Relay

Note:

The input range is set with a DIP switch.

*

The power supply voltage is the same as the rated input voltage.

Options (Order Separately)

Front Cover

Refer to 

Safety Precautions

 on page 9.

Refer to pages 7 to 8 for commonly asked questions.

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

Rated input voltage 

*

Output

Model

3-phase 3-wire 200, 220, 230, 240 VAC

Relay: SPDT contact output

K8DT-PM1CN

Transistor: Open collector

K8DT-PM1TN

3-phase 3-wire 380, 400, 415, 480 VAC

Relay: SPDT contact output

K8DT-PM2CN

Transistor: Open collector

K8DT-PM2TN

Appearance

Model

Y92A-D1A

Summary of Contents for K8DT-PM

Page 1: ...h America Certification is pending for LR standards Models added with transistor outputs for superior contact reliability RoHS compliant Ordering Information Three phase Voltage and Phase sequence Pha...

Page 2: ...bient operating humidity 25 to 85 RH with no condensation Storage humidity 25 to 85 RH with no condensation Altitude 2 000 m max Applicable wires Stranded wires solid wires or ferrules Applicable wire...

Page 3: ...nd after an incorrect phase is detected and once per 0 5 second during the detection time K8DT PM1 C N L1 14 L2 11 12 L3 DIP SW Inside Inside 2 Output C Relay Output T Transistor Output 14 11 12 14 11...

Page 4: ...ck See Note Terminal block See Note Power indicator Output status indicator Overvoltage knob OVER Undervoltage knob UNDR Operating time knob T Alarm indicator 8 mm 8 mm Solid Wire 8 mm Stranded Wires...

Page 5: ...R The undervoltage can be set to between 30 and 30 of the rated input Turn the knob while there is an input to the input terminals until the alarm indicator flashes when the set value and the input ha...

Page 6: ...0 Three phase Voltage and Phase sequence Phase loss Relays K8DT PM1 K8DT PM2 Options Order Separately Front Cover Y92A D1A 52 7 3 5 1 8 17 5 5 85 DIN Tracks PFP 100N PFP 50N Dimensions in parentheses...

Page 7: ...rminals is 120 of the set value for overvoltage detection or 80 of the set value for undervoltage detection when the auxiliary relay in connection diagram 2 operates Close the switch and use a cycle c...

Page 8: ...tected because the motor terminal voltage does not drop very much even if a phase is lost when the load on the motor is light To detect motor load phase loss during operation use the undervoltage dete...

Page 9: ...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 regularly To maintain s...

Page 10: ...e terminal block may be damaged 25 Insert a flat blade screwdriver into the release holes at an angle The terminal block may be damaged if the screwdriver is inserted straight in 26 Do not allow the f...

Page 11: ...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 12: ...maximum applied voltage for the clearance solid insulation and other factors There is basic insulation between the input terminals and output terminals Operating section must have reinforced or doubl...

Page 13: ...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 14: ...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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