Omron K8AB-PM Product Manual
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Omron K8AB-PM Product Manual

Three-phase phase-sequence phase-loss relay
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Three-phase Phase-sequence Phase-loss Relay
K8AB-PM
Ideal for monitoring 3-phase power supplies
for industrial facilities and equipment.
• Monitor overvoltages, undervoltages, phase sequence, and
phase loss for three-phase 3-wire or 4-wire power supplies with
just one Unit.
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
PM:
Three-phase Phase-sequence Phase-loss 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. N146-E1-01
2
standard ferrules.
Three-phase Phase-sequence Phase-loss Relay
K8AB-PM
1

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Summary of Contents for Omron K8AB-PM

  • Page 1 Unit. 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%.) Phase sequence, phase loss 0.1 max. (Value when input rapidly changes from 0% to 100%.) 1 s or 5 s error ±0.5 s (Value when input rapidly changes from 0% to 100%. The operating time Power ON lock (LOCK) is the shortest at this point.)

  • 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

    Used to set the voltage to −30% to 25% of Undervoltage knob (UNDER) the rated input voltage. Operating time knob (T) Used to set the operating time to 0.1 to 30 s. K8AB-PM Three-phase Phase-sequence Phase-loss Relay Cat. No. N146-E1-01...

  • Page 5: Dip Switch Functions

    ■ Function Selection DIP Switch DIP Switch DIP Switch Functions Function Default Power ON lock time OFF Monitoring mode 3-phase 3-wire selector power monitoring mode 3-phase 4-wire power monitoring mode Function Default 3-phase 3-phase 3-wire 4-wire mode mode 200 VAC...

  • 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.

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