NK ASL3-NCU-SP - Current Sensing Switch, ASL Series; 50-100 A (Split Core)

• ASL series
• Current sensing switch
• Full scale range =  50-100 A (split-core)
• Output type = Normally Closed
• Case style = Split-core

The ASL Series Current Sensing Switches provide a current operated solid-state contact powered from the monitored circuit. The trip point adjustment uses a single turn potentiometer. By turning the adjustment arrow to the current magnitude needed, the installer can set the point where the output changes state when the monitored circuit is not energized. With the split-core case option, installation is just a matter of placing the sensor over the conductor. It couldn’t be easier.

Current Sensing Switch Applications

AC Motor Loads

• Set a normally open contact over the normal running current level and it will open if the drive belt breaks or comes off the sheaves.
• Set a normally closed contact below the normal run current level and it will open on overload conditions.
• Monitor up to 150 A loads.

Critical Lighting Loads

• Monitor security lighting and water navigational indicators.

Heating Loads

• Receive independent verification that an element is working properly.
• Monitor drying and curing processes remotely.

Current Sensing Switch Features

Easily Established Contact Actuation Point

• Patented potentiometer setpoint selection.
• Trip point indicated on the labeling.
• Trip point can be set without energizing the monitored load, adding a large measure of safety.
• Two-second delay before contact action upon initial energization allows the output to ignore motor inrush current.

Isolation

• Output is magnetically isolated from the input for safety.
• Eliminates insertion losses, no added burden.

Solid-state Reliability

• No moving components for switching.
• No need for periodic maintenance or calibration.

Panel Mounted Solid- or Split-core Case

• Split-core case allows installation without disturbing existing wiring and can be mounted in any position. Either case can be attached to a panel, hung on the conductor or on a DIN rail adapter (included).*
• Both solid - or split-core cases provide windows large enough for 150 A loads, non-contact design provides complete isolation between monitored load and control circuitry.

No External Power Needed

• Sensor is powered from the monitored AC circuit.
• Choose normally open (closing on current increase) or normally closed (opening on current increase).
• Fast action contact reacts quicker than RTD, thermocouples, or bimetallic thermal elements.

UL/cUL and CE Approved

• Accepted worldwide.

Current Sensing Switch Output Type

Current Sensing Switch Connection

Current Sensing Switch Ordering Information

Sample Model Number: ASL1-NOU-FF

Solid-core AC current sensing switch with single turn setpoint adjustment, Smart LED standard. (DIN rail adapters are included)