Omron K8AB-AS Manual
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Omron K8AB-AS Manual

Single-phase current relay
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Single-phase Current Relay
K8AB-AS
Ideal for current monitoring for industrial
facilities and equipment.
• Monitor for overcurrents or undercurrents.
• Manual resetting and automatically resetting supported by one
Relay.
• Startup lock and operating time can be set separately.
• One SPDT output relay, 6 A at 250 VAC (resistive load).
• Output relay can be switched between normally open and
normally closed.
• Process control signal (4 to 20 mA) supported.
• Commercial CT input signal (0 to 1 A, 0 to 5 A) supported.
• Output status can be monitored using LED indicator.
Model Number Structure
■ Model Number Legend
K8AB-@@
1
2 3
4
1. Basic Model
K8AB: Measuring and Monitoring Relays
2. Functions
AS:
Single-phase Current Relay (One-sided operation)
3. Measuring Current
1:
2 to 20 mA AC/DC, 10 to 100 mA AC/DC, 50 to 500 mA AC/DC
2:
0.1 to 1 A AC/DC, 0.5 to 5 A AC/DC, 0.8 to 8 A AC/DC
3:
10 to 100 A AC, 20 to 200 A AC (See note.)
Note: The K8AB-AS3 is specially designed to be used in combination with the OMRON K8AC-CT200L Current Transformer (CT). (Direct input is
not possible.)
4. Supply Voltage
24 VDC:
24 VDC
24 VAC:
24 VAC
100-115 VAC: 100 to 115 VAC
200-230 VAC: 200 to 230 VAC
Cat. No. N142-E1-02
Single-phase Current Relay
K8AB-AS
1

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Summary of Contents for Omron K8AB-AS

  • Page 1 0.1 to 1 A AC/DC, 0.5 to 5 A AC/DC, 0.8 to 8 A AC/DC 10 to 100 A AC, 20 to 200 A AC (See note.) Note: The K8AB-AS3 is specially designed to be used in combination with the OMRON K8AC-CT200L Current Transformer (CT). (Direct input is not possible.) 4.

  • Page 2: Ordering Information

    If an unwanted current path exists, use a K8AB AC Power Supply or isolate with an external power supply. 2. The K8AB-AS3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT). (Direct input is not possible.)
  • Page 3 Unit will not operate normally. If an unwanted current path exists, use a K8AB model with an AC power supply or use an isolated DC power supply. K8AB-AS Cat. No. N142-E1-02...
  • Page 4 10 sweeps of 5 min each in X, Y, and Z directions Shock resistance 100 m/s , 3 times each in 6 directions along three axes (up/down, left/right, forward/backward) Degree of protection Terminal section: Finger protection K8AB-AS Single-phase Current Relay Cat. No. N142-E1-02...
  • Page 5 Undercurrent Operation Diagram Load Load (Output: Normally Closed) Note: The K8AB-AS3 is designed to be used in combination with the OMRON K8AC-CT200L Current Transformer (CT). Power supply The 24-VDC power supply type is a non-insulated power voltage supply. The inputs and power supply are connected internally, so a...

  • Page 6: Setting Knobs

    8 mm max. 8 mm max. Recommended ferrules Phoenix Contact • Al 1,5-8BK (for AWG16) • Al 1-8RD (for AWG18) • Al 0,75-8GY (for AWG18) 2. Tightening torque Recommended: 0.49 N·m Maximum: 0.54 N·m K8AB-AS Single-phase Current Relay Cat. No. N142-E1-02...

  • Page 7: Dip Switch Settings

    Malfunctions may occur if the input is connected to unused terminals and the Unit will not operate correctly. Terminal I1 is not used by the K8AB-AS3. K8AB-AS3 If using the OMRON K8AC-CT200L CT, connect to terminals k and l on the K8AC-CT200L. (Terminals kt and lt are not used.) Power supply 2. Power Supply voltage Connect the power supply to terminals A1 and A2.
  • Page 8 34.5 81.5 33.5 30 dia. 14.5 14.5 Note: The OMRON Current Transformer (CT) is designed to be used with the K8AB-AS3. Use terminals k and l for connections. (Terminals kt and lt are not used.) K8AB-AS Single-phase Current Relay Cat. No. N142-E1-02...

  • Page 9: Safety Precautions

    30 Vr.m.s with 42.4 V at peak or DC60V maximum. 2. When using a noise filter, check the voltage and current and Recommended power-supply: Model S8VS-06024@. (Omron install it as close to the product as possible. product) 3.
  • Page 10 The K8AB-AS@ has a built-in filter as a countermeasure against high frequencies and cannot be used to remove pulse current.
  • Page 11 The overload capacity of the K8AB-AS3 is 200% of the rated current for 30 s, so the K8AB-AS3 would not fail even if the startup current continued for 30 s, enabling overload detection. K8AB-AS Cat. No. N142-E1-02 Single-phase Current Relay...

  • 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.

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