Datasheet

ManualsBrandsOmron Industrial Automation ManualsMonitoring RelaysVoltage Monitoring Relay, Value Design

New Product

Single-phase Overvoltage/Undervoltage Relay

K8DT-VW

Detect abnormal voltages applies to equipment to

protect against equipment failure.

Monitor for overvoltages and undervoltages

simultaneously with one Relay.

• Monitor AC or DC voltages with one Relay.

• Settings for the operating value, hysteresis, and operating time.

• 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.

• Models added with transistor outputs for superior contact reliability.

• RoHS compliant

Ordering Information

Single-phase Overvoltage/Undervoltage Relay

Options (Order Separately)

Front Cover

Ratings and Specifications

Input Range

* The range is selected using connected terminals.

Refer to Safety Precautions on page 8.

Refer to page 7 for commonly asked questions.

Setting range Power supply voltage Output Model

1 to 10 V AC/DC

3 to 30 V AC/DC

15 to 150 V AC/DC

24 VAC/DC

Relay: SPDT contact output K8DT-VW2CD

Transistor: Open collector K8DT-VW2TD

100 to 240 VAC

Relay: SPDT contact output K8DT-VW2CA

Transistor: Open collector K8DT-VW2TA

20 to 200 V AC/DC

30 to 300 V AC/DC

60 to 600 V AC/DC

24 VAC/DC

Relay: SPDT contact output K8DT-VW3CD

Transistor: Open collector K8DT-VW3TD

100 to 240 VAC

Relay: SPDT contact output K8DT-VW3CA

Transistor: Open collector K8DT-VW3TA

For the most recent information on models

that have been certified for safety

standards, refer to your OMRON website.

Appearance Model

Y92A-D1A

Model Range * Connection terminal Setting range Input impedance Overload capacity

K8AK-VW2@@

0 to 10 V AC/DC V1-COM 1 to 10 V AC/DC Approx. 120 k

Continuous input at 115% of

maximum input.

10 s at 125%

(up to 600 VAC)

0 to 30 V AC/DC V2-COM 3 to 30 V AC/DC Approx. 320 k

0 to 150 V AC/DC V3-COM 15 to 150 V AC/DC Approx. 1.6 M

K8AK-VW3@@

0 to 200 V AC/DC V1-COM 20 to 200 V AC/DC Approx. 1.2 M

0 to 300 V AC/DC V2-COM 30 to 300 V AC/DC Approx. 1.7 M

0 to 600 V AC/DC V3-COM 60 to 600 V AC/DC Approx. 3.1 M

Summary of content (14 pages)

PAGE 1
New Product Single-phase Overvoltage/Undervoltage Relay K8DT-VW Detect abnormal voltages applies to equipment to protect against equipment failure. Monitor for overvoltages and undervoltages simultaneously with one Relay. • Monitor AC or DC voltages with one Relay. • Settings for the operating value, hysteresis, and operating time. • 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).
PAGE 2
K8DT-VW Ratings 2 Specifications Power supply voltage K8DT-VW@@D: 24 VAC 50/60 Hz, 24 VDC K8DT-VW@@A: 100 to 240 VAC 50/60 Hz Allowable operating voltage range 85% to 110% of rated power supply voltage Power consumption 24 VAC/DC: 1.8 VA/1 W max. 100 to 240 VAC: 2.5 VA max. Allowable operating frequency range 50/60 Hz 5 Hz Rated insulation voltage 600 VAC Input frequency range 40 to 500 Hz Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC).
PAGE 3
K8DT-VW Connections Terminal Diagram K8DT-VW2 C A (3) Power Supply Voltage (1) (2)(3) A: 100 to 240 VAC (1) Voltage Input VW3 VW2 150V max. 600V max. 30V max. 300V max. 10V max. 200V max. V1 V1 V2 C V3 V2 C A1 A2 V1 C V2 V3 A1 A2 D: 24 VAC/DC A1 A2 (No polarity) (2) Output DIP SW C: Relay Output 12 V3 14 11 T: Transistor Output 12 14 11 14 11 Inside Inside Note: 1. 2. 3. 4. Do not connect anything to terminals that are shaded in gray.
PAGE 4
K8DT-VW Timing Charts Overvoltage and Undervoltage Operation Diagram Undervoltage and Undervoltage Operation Diagram DIP switch settings: SW3 and SW4 both ON or both OFF. DIP switch settings: SW3 OFF and SW4 ON.
PAGE 5
K8DT-VW Operation Methods Setting Ranges and Wiring Connections Model Setting range 1 to 10 V AC/DC K8DT-VW2 K8DT-VW3 Wiring connection V1-COM 3 to 30 V AC/DC V2-COM 15 to 150 V AC/DC V3-COM 20 to 200 V AC/DC V1-COM 30 to 300 V AC/DC V2-COM 60 to 600 V AC/DC V3-COM Connections Input Single-phase power Connect the input between terminals V1-COM, V2-COM, or V3-COM, depending on the input voltage.
PAGE 6
K8DT-VW Setting Method Setting Voltage Operating Time The voltage knob (AL1 and AL2) is used to set the voltage. The voltage 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 voltage. The maximum setting range will differ depending on the model and the input terminal.
PAGE 7
K8DT-VW Questions and Answers Q Q Checking Operation Overvoltages 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 by the relay outputs that will start 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 overvoltage.
PAGE 8
K8DT-VW 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 9
K8DT-VW Precautions for Safe Use 30.To prevent wire materials from smoking or igniting, 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 Stripping length Recommended wire Without Ferrules With Ferrules • Outdoor locations or under direct sunlight • Locations subject to dust or corrosive gases (sulfurizing gases, ammonia gases, etc.
PAGE 10
K8DT-VW 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 11
K8DT-VW Recommended Ferrules and Tools EN/IEC Standard Compliance Recommended ferrules Wire (mm2) (AWG) 0.25 Recommended ferrules Ferrule length (mm) 24 Manufactured Manufactured Manufactured by Phoenix by by Wago Contact Weidmuller 8 AI0.25-8 H0.25/12 FE-0.25-8N-YE 0.34 22 8 AI0.34-8 H0.34/12 FE-0.34-8N-TQ 0.5 20 8 AI0.5-8 H0.5/14 FE-0.5-8N-WH 0.75 18 8 AI0.75-8 H0.75/14 FE-0.75-8N-GY 1 18 8 AI1-8 H1.0/14 FE-1.0-8N-RD 1.5 16 8 AI1.5-8 H1.5/14 FE-1.
PAGE 12
MEMO 12
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.