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Prevents reverse motor rotation due to incorrect wiring. Distinguishes between positive phases, reversed phases, and phase loss when power is turned ON. Voltage detection method enables application for any load current. Output status can be monitored using LED indicator. Ferrules with insulating sleeves must be used with twisted wires. Two wires can be twisted together. Note: The error in the operating value and operating time under standard conditions.

Motor load phase loss cannot be detected. L1 and L3 function both as the power supply terminals and as input terminals. Phase loss is detected based on the phase sequence, so phase loss cannot be detected for loads that generate inductive power, e.

Phase loss is detected based on voltage, so phase loss cannot be detected on the load side. Relay status indicator Lit when relay is operating normally lit. The input across L1 and L3 is used for the internal power supply. Therefore, the power indicator will not be lit if there is no input across L1 and L3. Use either a solid wire of 2. The length of the exposed current-carrying part inserted into the terminal must be 8 mm or less to maintain dielectric strength after connection.

For 2. Recommended ferrules Phoenix Contact? Tightening torque Recommended: 0. Input Connect using L1, L2, and L3. Make sure the phase sequence is wired correctly. The Unit will not operate normally if the phase sequence is incorrect. It can be used to detect phase loss at startup. Normally, three-phase motors will continue to rotate even if one phase is open. The three-phase voltage will be induced at the motor terminals. The diagram shows voltage induction at the motor terminals when phase R has been lost with a load applied to a three-phase motor.

The horizontal axis shows the motor load as a percentage of the rated load, and the vertical axis shows voltage as a percentage of the rated voltage. The lines in the graph show the voltage induced at the motor terminals for each load when phase loss occurs during operation. As the graph shows, voltage is induced at the motor terminals even if there is phase loss for a motor load, so the K8AB-PH1 cannot detect phase loss for motor loads during operation.

Voltage as a percentage of rated voltage Q Can phase loss be detected on the load side? In principle, phase loss cannot be detected on the load side because the K8AB-PH1 measures three-phase voltage to determine phase loss. To convert millimeters into inches, multiply by 0. To convert grams into ounces, multiply by 0.

In the interest of product improvement, specifications are subject to change without notice. In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.

This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the end product, machine, system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses listed may be suitable for the products:?

Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog. Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety equipment, and installations subject to separate industry or government regulations.

Systems, machines, and equipment that could present a risk to life or property. Please know and observe all prohibitions of use applicable to the products. It is our practice to change model numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the products may be changed without any notice.

When in doubt, special model numbers may be assigned to fix or establish key specifications for your application on your request. Please consult with your OMRON representative at any time to confirm actual specifications of purchased products.


K8AB-PH1 Omron, K8AB-PH1 Datasheet










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