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New Product

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

K8DT-PZ

Protect motors and other equipment from unstable

voltages in the power supply system.

Detect overvoltages, undervoltages, voltage

asymmetry, phase sequence, and phase loss for

three-phase power supplies.

• Phase loss detection while the motor is operating.

• Global power supply support. (Changed with a switch.)

• Greater resistance to inverter noise.

• 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.

• Certified for maritime standards (LR).

• Models added with transistor outputs for superior contact reliability.

Ordering Information

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

Note: The input range is set with a rotary 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 mode 200, 220, 230, 240 VAC

Relay: SPDT contact output K8DT-PZ1CN

Transistor K8DT-PZ1TN

3-phase 3-wire mode 380, 400, 415, 480 VAC

Relay: SPDT contact output K8DT-PZ2CN

Transistor K8DT-PZ2TN

Appearance Model

Y92A-D1A

Summary of content (14 pages)

PAGE 1
New Product Three-phase Voltage, Asymmetry, and Phase-sequence Phase-loss Relay K8DT-PZ Protect motors and other equipment from unstable voltages in the power supply system. Detect overvoltages, undervoltages, voltage asymmetry, phase sequence, and phase loss for three-phase power supplies. • Phase loss detection while the motor is operating. • Global power supply support. (Changed with a switch.) • Greater resistance to inverter noise. • Width of 17.5 mm to reduce space required in panels.
PAGE 2
K8DT-PZ Ratings and Specifications Ratings Input frequency Input load K8DT-PZ1: Approx. 1.7 VA K8DT-PZ2: Approx. 2.7 VA Rated insulation voltage 528 VAC Repeat accuracy Operating time Operating value setting range Overvoltage/Undervoltage 2% to 30% of rated input voltage Asymmetry 5% to 22% of rated input voltage Note: The rated input voltage can be switched by using the DIP switches. Rated input voltage Overvoltage/Undervoltage Operates at 100% of set value.
PAGE 3
K8DT-PZ Connections Terminal Diagram K8DT-PZ1 C N (1) (2) L1 (1) Input Voltages L2 L3 PZ1 PZ2 Phase-to-phase voltage: 200 to 240 VAC 3-phase, 3W power supply Phase-to-phase voltage: 380 to 480 VAC 3-phase, 3W power supply L1 (2) Output L2 L1 L3 L2 DIP SW L3 12 14 C: Relay Output T: Transistor Output 12 14 11 11 14 11 Inside Inside Note: Do not connect anything to terminals that are shaded in gray.
PAGE 4
K8DT-PZ Nomenclature Front Indicators Item Terminal block (See note.) Asymmetry rate knob (ASY) Power indicator Output status indicator Lit when power is being supplied. * Output status indicator (Output: Yellow) Lights for output (lit for normal operation) • Lights for overvoltage/undervoltage error. When the voltage exceeds the set value, the indicator flashes for the operating time to indicate the error status. • Lights for asymmetry error. • Lights for phase loss.
PAGE 5
K8DT-PZ DIP Switch Settings The Power ON lock time, rated voltage are set using the DIP switch located on the front of the Unit. The K8DT-PZ@ does not have 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-PZ Dimensions (Unit: mm) Three-phase Voltage, Asymmetry, and Phase-sequence Phase-loss Relays K8DT-PZ1 K8DT-PZ2 100 90 86 17.5 5 90 Options (Order Separately) Front Cover Y92A-D1A 1.8 52.7 3.5 17.5 5.85 Optional Parts for DIN Track Mounting DIN Tracks PFP-100N PFP-50N 7.3±0.15 4.5 35±0.3 15 25 10 25 25 1000(500) * 10 25 15(5) * 27±0.15 1 * Dimensions in parentheses are for the PFP-50N.
PAGE 7
K8DT-PZ Questions and Answers Q Q Checking Operation How to Measure the Operating Time Overvoltage Gradually increase the input from 80% of the set value. The input will equal the operating value when the input exceeds the set value and the alarm indicator starts flashing. Operation can be checked because the Relay will operate after the operating time has passed. Undervoltage Gradually decrease the input from 120% of the set value and check the operation using the same method as for an overvoltage.
PAGE 8
K8DT-PZ Questions and Answers Q Q Load-side Phase Loss In principle, phase loss cannot be detected on the load side because the K8DT-PZ measures three-phase voltage to determine phase loss. Q Motor Load Phase Loss during Operation Motor load phase loss cannot be detected during operation. Use the undervoltage detection function. Normally, three-phase motors will continue to rotate even if one phase is open. The three-phase voltage will be induced at the motor terminals.
PAGE 9
K8DT-PZ 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 in minor or moderate injury, or may result in serious injury or death. Additionally, there may be significant property damage.
PAGE 10
K8DT-PZ Precautions for Safe Use 29.To prevent wiring materials from smoking or igniting, confirm wire ratings and use the wiring materials given in the following table. 1. Do not use or store the product in the following locations. • Locations subject to water, or oil • Outdoor locations or under direct sunlight • Locations subject to dust or corrosive gases (sulfurizing gases, ammonia gases, etc.
PAGE 11
K8DT-PZ Screw Mounting Connecting Stranded Wires 1. Pull out the two hooks on the back of the Relay to the outside until you hear them click in place. 2. Insert M3 screws into the hook holes and secure the Relay. Use the following procedure to connect the wires to the terminal block. 1. Hold a flat-blade screwdriver at an angle and insert it into the release hole. The angle should be between 10° and 15°.
PAGE 12
K8DT-PZ Recommended Ferrules and Tools EN/IEC Standard Compliance Recommended ferrules Applicable wire (mm2) Stripping Ferrule Recommended ferrules length Conductor (mm) Length (Ferrules Phoenix Contact Weidmuller (AWG) Wago product (mm) used) product product 0.25 24 0.34 22 0.5 20 0.75 18 1/1.25 1.25/1.5 18/17 17/16 8 10 AI 0.25-8 H0.25/12 FE-0.25-8N-YE 10 12 AI 0.25-10 --- --- 8 10 AI 0.34-8 H0.34/12 FE-0.34-8N-TQ 10 12 AI 0.34-10 --- --- 8 10 AI 0.5-8 H0.5/14 FE-0.
PAGE 13
Terms and Conditions Agreement Read and understand this catalog. Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranties. (a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron).
PAGE 14
OMRON Corporation Industrial Automation Company Authorized Distributor: Kyoto, JAPAN Contact: www.ia.omron.com Regional Headquarters OMRON EUROPE B.V. Wegalaan 67-69, 2132 JD Hoofddorp The Netherlands Tel: (31)2356-81-300/Fax: (31)2356-81-388 OMRON ELECTRONICS LLC 2895 Greenspoint Parkway, Suite 200 Hoffman Estates, IL 60169 U.S.A. Tel: (1) 847-843-7900/Fax: (1) 847-843-7787 OMRON ASIA PACIFIC PTE. LTD. No.