Omron K8AB-PW Product Manual
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Omron K8AB-PW Product Manual

Three-phase voltage relay
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Three-phase Voltage Relay
K8AB-PW
Ideal for monitoring 3-phase power supplies
for industrial facilities and equipment.
• Monitor overvoltages and undervoltages for three-phase 3-wire
or 4-wire power supplies.
Switch setting for 3-phase 3-wire or 3-phase 4-wire power
supply.
• Two SPDT output relays, 6 A at 250 VAC (resistive load).
Separate outputs possible for overvoltages and undervoltages.
• World-wide power specifications supported by one Unit
(switchable).
• Relay warning status easily monitoring using LED indicator.
• Easy wiring with ferrules
2 × 2.5 mm
solid or 2 × 1.5 mm
2
• CE mark compliance certified by third party.
UL certification pending.
Model Number Structure
■ Model Number Legend
K8AB-@@
1
2 3
1. Basic Model
K8AB: Measuring and Monitoring Relays
2. Functions
PW:
Three-phase Voltage Relay (Simultaneous upper and lower monitoring)
3. Rated Input Voltage
1:
115, 127, 133, 138, 200, 220, 230, 240 VAC
2:
220, 230, 240, 277, 380, 400, 415, 480 VAC
Cat. No. N148-E1-01
2
standard ferrules.
Three-phase Voltage Relay
K8AB-PW
1

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Summary of Contents for Omron K8AB-PW

  • Page 1 4-wire power supplies. Switch setting for 3-phase 3-wire or 3-phase 4-wire power supply. • Two SPDT output relays, 6 A at 250 VAC (resistive load). Separate outputs possible for overvoltages and undervoltages. • World-wide power specifications supported by one Unit (switchable).

  • Page 2: Ordering Information

    0.1 to 30 s (Value when input rapidly changes from 0% to 120%.) undervoltage Power ON lock (LOCK) 1 s or 5 s (Value when input rapidly changes from 0% to 100%. The operating time is the shortest at this point.) Setting accuracy ±10% of full scale...

  • Page 3: Specifications

    Insulation resistance 20 MΩ (at 500 V) between charged terminals and exposed uncharged parts 20 MΩ (at 500 V) between any charged terminals (i.e., between input, output, and power supply terminals) Degree of protection Terminal section: IP20, Rear case: IP40...

  • Page 4: Wiring Diagram

    Setting Knobs Item Usage Overvoltage knob (OVER) Used to set the voltage to −30% to 25% of the rated input voltage. Used to set the voltage to −30% to 25% Undervoltage knob (UNDER) of the rated input voltage.

  • Page 5: Dip Switch Functions

    3-phase 3-phase SW3 SW4 3-wire 4-wire mode mode OFF Rated input 200 VAC 115 VAC OFF voltage switch 220 VAC 127 VAC (K8AB-PW1) 230 VAC 133 VAC 240 VAC 138 VAC OFF Rated input 380 VAC 220 VAC OFF voltage switch...

  • Page 6: Safety Precautions

    (If you do not secure space for heat dissipation, life cycle of 8. There is a remote risk of explosion. Do not use this product where the product will be compromised.) flammable or explosive gas exists.

  • Page 7: 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-pw1K8ab-pw2

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