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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.
Refer to Safety Precautions on page 9.
Refer to pages 7 to 8 for commonly asked questions.
Ordering Information
Three-phase Voltage and Phase-sequence Phase-loss Relay
Rated input voltage *
3-phase 3-wire 200, 220, 230, 240 VAC
3-phase 3-wire 380, 400, 415, 480 VAC
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
Appearance
Model
Y92A-D1A
Output
Relay: SPDT contact output
Transistor: Open collector
Relay: SPDT contact output
Transistor: Open collector
For the most recent information on models
that have been certified for safety
standards, refer to your OMRON website.
Model
K8DT-PM1CN
K8DT-PM1TN
K8DT-PM2CN
K8DT-PM2TN
1
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Related Manuals for Omron K8DT-PM
Summary of Contents for Omron K8DT-PM
- Page 1 For the most recent information on models that have been certified for safety • UL listed for easy shipping to North America. standards, refer to your OMRON website. • Certification is pending for LR standards. • Models added with transistor outputs for superior contact reliability.
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Page 2: Specifications
K8DT-PM Ratings and Specifications Ratings Specifications K8DT-PM1@N: Three-phase, three-wire Mode: Input frequency 50/60 Hz 200, 220, 230, or 240 VAC Rated input voltage Overload capacity Continuous 528 V K8DT-PM2@N: Three-phase, three-wire Mode: 0.5% full scale (at 25C and 65% humidity, rated... -
Page 3: Wiring Example
Note: Use copper wires with a rating of 75°C or an equivalent rating. Timing Charts Overvoltage/Undervoltage and Phase Sequence/Phase Loss Operation Diagram Power supply Note: 1. The K8DT-PM@ output contacts are normally operative. voltage Hysteresis: 2. The power ON lock prevents unnecessary alarms from being... - Page 4 K8DT-PM Nomenclature Front Indicators Item Meaning Terminal block Power indicator (See Note.) Lit when power is being supplied.* (PWR: Green) Output status indicator Lights for output (lit for normal operation) (OUT: Yellow) • Lights for overvoltage error. When the input exceeds the overvoltage...
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Page 5: Dip Switch Settings
DIP Switch Settings The Power ON lock time, rated voltage are set using the DIP switch located on the front of the Unit. K8DT-PM@ does not use SW2. Note: Open the DIP switch cover to set the DIP switch. Keep the DIP switch cover closed while the power supply to the Relay is ON. - Page 6 K8DT-PM Dimensions (Unit: mm) Three-phase Voltage and Phase-sequence Phase-loss Relays K8DT-PM1 K8DT-PM2 17.5 Options (Order Separately) Front Cover Y92A-D1A 52.7 17.5 5.85 Optional Parts for DIN Track Mounting DIN Tracks PFP-100N ±0.15 PFP-50N ±0.3 ±0.15 15(5) * 1000(500) * * Dimensions in parentheses are for the PFP-50N.
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Page 7: Questions And Answers
K8DT-PM Questions and Answers Checking Operation How to Measure the Operating Time Overvoltage Overvoltage Gradually increase the input from 80% of the set value. The Change the input suddenly from 70% to 120% of the set value input will equal the operating value when the input exceeds and measure the time until the Unit operates. - Page 8 In principle, phase loss cannot be detected on the load side The K8DT monitors all three phase voltages. Therefore, an because the K8DT-PM measures three-phase voltage to overvoltage is detected if only one of the phase-to-phase determine phase loss.
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Page 9: Safety Precautions
K8DT-PM Safety Precautions Be sure to read the precautions for all models in the website at the following URL: http://www.ia.omron.com/. Warning Indications !WARNING Indicates a potentially hazardous situation which, if not avoided, will result Electrical shock may occasionally cause serious injury. Confirm... - Page 10 K8DT-PM 29.To prevent wire materials from smoking or igniting, use the wiring Precautions for Safe Use materials given in the following table. 1. Do not use or store the product in the following locations. Stripping length • Locations subject to water, or oil...
- Page 11 K8DT-PM Screw Mounting Connecting Stranded Wires 1. Pull out the two hooks on the back of the Relay to the outside until Use the following procedure to connect the wires to the terminal block. you hear them click in place.
- Page 12 K8DT-PM Recommended Ferrules and Tools EN/IEC Standard Compliance Recommended ferrules • Refer to the contents of this datasheet for cable selection and other Wire Recommended ferrules conditions for compliance with EMC standards. Ferrule Manufactured Manufactured length Manufactured Precaution on EN Standard Compliance...
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Page 13: Terms And Conditions Agreement
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate it to actual application requirements. - Page 14 The Netherlands Hoffman Estates, IL 60169 U.S.A. Tel: (31)2356-81-300/Fax: (31)2356-81-388 Tel: (1) 847-843-7900/Fax: (1) 847-843-7787 © OMRON Corporation 2016 All Rights Reserved. OMRON (CHINA) CO., LTD. OMRON ASIA PACIFIC PTE. LTD. In the interest of product improvement, Room 2211, Bank of China Tower, No.