Omron K8AB-VW Series Quick Start Manual
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Omron K8AB-VW Series Quick Start Manual

Single-phase voltage relay
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Single-phase Voltage Relay
K8AB-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, 6 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.
Model Number Structure
Model Number Legend
K8AB-@@
1
2 3
4
1. Basic Model
K8AB:
Measuring and Monitoring Relays
2. Functions
VW:
Single-phase Voltage Relay (Simultaneous upper and lower limit monitoring)
3. Measuring Current
1:
6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 30 to 300 mV AC/DC
2:
1 to 10 V AC/DC, 3 to 30 V AC/DC, 15 to 150 V AC/DC
3:
20 to 200 V AC/DC, 30 to 300 V AC/DC, 60 to 600 V AC/DC
4. Supply Voltage
24 VAC/DC:
24 VAC/DC
100-115 VAC: 100 to 115 VAC
200-230 VAC: 200 to 230 VAC
1

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Summary of Contents for Omron K8AB-VW Series

  • Page 1 New Product Single-phase Voltage Relay K8AB-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.
  • Page 2 K8AB-VW Ordering Information List of Models Single-phase Voltage Relay Measuring voltage Supply voltage Model 24 VAC/DC K8AB-VW1 24 VAC/DC 6 to 60 mV AC/DC, 10 to 100 mV AC/DC, 100-115 VAC K8AB-VW1 100-115 VAC 30 to 300 mV AC/DC 200-230 VAC K8AB-VW1 200-230 VAC 24 VAC/DC K8AB-VW2 24 VAC/DC...
  • Page 3 K8AB-VW Ratings Power supply Isolated power supply 24 VDC, 24 VAC, 100 to 115 VAC, 200 to 230 VAC voltage 24 VDC: 1 W max. 24 VAC: 4 VA max. Power consumption 100 to 115 VAC: 4 VA max. 200 to 230 VAC: 5 VA max. 10% to 100% of maximum measuring voltage K8AB-VW1: 6 to 60 mV AC/DC 10 to 100 mV AC/DC...

  • Page 4: Specifications

    K8AB-VW Specifications Allowable power supply voltage range 85% to 110% of power supply voltage 50/60 Hz ±5 Hz Allowable power supply frequency range Input frequency range 40 to 500 Hz Overload capacity Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input Operating value Set value ±10% full scale Setting error...
  • Page 5 K8AB-VW Connections Wiring Diagram 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 Hysteresis: Fixed at 5% Undervoltage set value (AL1)
  • Page 6 K8AB-VW Nomenclature Front Indicators 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) (RY: Yellow) (Normally lit) Voltage knob (AL1)

  • Page 7: Dip Switch Settings

    K8AB-VW Operation and Setting Methods Setting Ranges and Wiring Connections Model Measuring current Wiring connection 6 to 60 mV AC/DC V1-COM K8AB-VW1 10 to 100 mV AC/DC V2-COM 30 to 300 mV AC/DC V3-COM 1 to 10 V AC/DC V1-COM K8AB-VW2 3 to 30 V AC/DC V2-COM...

  • Page 8: Setting Method

    K8AB-VW Setting Method 1. Setting Voltage The voltage knob (AL1 and AL2) is used to set the voltage. The voltage can be set to 10% to 100% of the maximum measuring voltage. 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.

  • Page 9: Questions And Answers

    K8AB-VW Questions and Answers Checking Operation Operating Adjustment Knobs Overvoltages Use a screwdriver to turn the knobs. There is a stopper to prevent the knob from turning any further once it has been Gradually increase the input from 80% of the setting. turned completely to the left or right.
  • Page 10 K8AB-VW...
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  • Page 12: Warranty And Application Considerations

    Warranty and Limitations of Liability WARRANTY OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified) from date of sale by OMRON. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS.

This manual is also suitable for:

K8ab-vw1 24 vac/dcK8ab-vw1 100-115 vacK8ab-vw1 200-230 vacK8ab-vw2 24 vac/dcK8ab-vw2 100-115 vacK8ab-vw2 200-230 vac ... Show all

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