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Single-phase Overvoltage/Undervoltage Relay
K8AK-VW
Ideal for Voltage Monitoring for
Industrial Facilities and Equipment.
• Monitor for overvoltages and undervoltages simultaneously.
Separate settings and outputs supported for overvoltages and
undervoltages.
• Manual resetting and automatically resetting supported by one
Relay.
• Pre-alarm Monitoring Mode.
• Two SPDT output relays, 5 A at 250 VAC (resistive load).
• Process control signal (0 to 10 V) and current splitter input
supported.
• Output status can be monitored using LED indicator.
• Input frequency of 40 to 500 Hz supported.
• Inputs are isolated from the power supply.
Refer to Safety Precautions on page 9.
Refer to page 8 for commonly asked questions.
Ordering Information
List of Models
Setting range
Power supply voltage
1 to 10 V AC/DC
24 VAC/DC
3 to 30 V AC/DC
100 to 240 VAC
15 to 150 V AC/DC
20 to 200 V AC/DC
24 VAC/DC
30 to 300 V AC/DC
100 to 240 VAC
60 to 600 V AC/DC
Ratings and Specifications
Input Range
Model
Range*
0 to 10 V AC/DC
K8AK-VW2
0 to 30 V AC/DC
0 to 150 V AC/DC
0 to 200 V AC/DC
K8AK-VW3
0 to 300 V AC/DC
0 to 600 V AC/DC
* The range is selected using connected terminals.
Model
K8AK-VW2 24 VAC/DC
K8AK-VW2 100-240 VAC
K8AK-VW3 24 VAC/DC
K8AK-VW3 100-240 VAC
Connection terminal
Setting range
V1-COM
1 to 10 V AC/DC
V2-COM
3 to 30 V AC/DC
15 to 150 V AC/DC
V3-COM
V1-COM
20 to 200 V AC/DC
V2-COM
30 to 300 V AC/DC
60 to 600 V AC/DC
V3-COM
For the most recent information on models that have been certified for
safety standards, refer to your OMRON website.
Input impedance
Approx. 120 kΩ
Approx. 320 kΩ
Approx. 1.6 MΩ
Approx. 1.2 MΩ
Approx. 1.7 MΩ
Approx. 3.1 MΩ
Overload capacity
Continuous input at 115% of
maximum input.
10 s at 125%
(up to 600 VAC)
1
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Table of Contents
Related Manuals for Omron K8AK-VW3
Summary of Contents for Omron K8AK-VW3
- Page 1 For the most recent information on models that have been certified for • Inputs are isolated from the power supply. safety standards, refer to your OMRON website. Refer to Safety Precautions on page 9. Refer to page 8 for commonly asked questions.
- Page 2 K8AK-VW2: 1 to 10 V AC/DC 3 to 30 V AC/DC Operating value setting range (AL1 and AL2) 15 to 150 V AC/DC K8AK-VW3: 20 to 200 V AC/DC 30 to 300 V AC/DC 60 to 600 V AC/DC Operating value...
- Page 3 K8AK-VW Specifications Allowable operating voltage range 85% to 110% of rated power supply voltage Allowable operating frequency range 50/60 Hz ±5 Hz Input frequency range 40 to 500 Hz Overload capacity Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC). ±0.5% full scale (at 25°C and an ambient humidity of 65% at the rated power supply voltage, DC and 50/60 Operating value Hz sine wave input)
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Page 4: Wiring Example
K8AK-VW Wiring Example Single-phase Load power supply Power supply AC/DC Power supply voltage Timing Charts ●Overvoltage and Undervoltage Operation ●Undervoltage and Undervoltage Operation Diagram Diagram (Undervoltage Pre-alarm Mode) DIP switch settings: SW3 and SW4 both ON or both OFF. DIP switch settings: SW3 OFF and SW4 ON. Power supply voltage Power supply voltage Input... - Page 5 K8AK-VW Nomenclature ●Indicators Front Item Meaning Terminal block Power indicator (See notes 1 and 2.) Lit when power is being supplied. (PWR: Green) Lit when relay operates (Not light when Relay status indicator both AL1 and AL2 are in error status) (Nor- (RY: Yellow) mally lit) Lit when there is an overvoltage or under-...
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Page 6: Dip Switch Settings
V1-COM K8AK-VW2 3 to 30 V AC/DC V2-COM 15 to 150 V AC/DC V3-COM 20 to 200 V AC/DC V1-COM K8AK-VW3 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 7 Use this as a guide to set the voltage. The maximum setting range will differ depending on the model and the input terminal. Example: K8AK-VW3 Using Input Terminal V3-COM The maximum setting range will be 600 VAC/VDC and the setting range will be 60 to 600 V.
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Page 8: Checking Operation
K8AK-VW Questions and Answers How to Measure the Operating Time Checking Operation Overvoltage Overvoltages Change the input suddenly from 0% to 120% of the set value Gradually increase the input from 80% of the set value. and measure the time until the Unit operates. The input will equal the operating value when the input Undervoltage exceeds the set value and the alarm indicator starts flashing. -
Page 9: Safety Precautions
K8AK-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 Electrical shock may occasionally cause serious injury. - Page 10 K8AK-VW Precautions for Safe Use Precautions for Correct Use 1. Do not use or store the product in the following locations. Observe the following operating • Locations subject to water or oil methods to prevent failure and • Outdoor locations or under direct sunlight malfunction.
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Page 11: 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 12 IL 60173-5302 U.S.A. The Netherlands Tel: (31)2356-81-300/Fax: (31)2356-81-388 Tel: (1) 847-843-7900/Fax: (1) 847-843-7787 © OMRON Corporation 2014 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.