NK Technologies AS1 Series AC Current Operated Switches

NK Technologies
NK Technologies

Key Features:

    Universal Output
  • N.O. or N.C. solid state switch for applications up to 240VAC/DC
  • Compatible with most automation systems
  • Cuts installation and operating costs
    Easily Adjustable Setpoint
  • Speeds startup
    Solid or Split-Core Case
  • Versions tailored for each installation
    Built-in Mounting Feet
  • Simple, two-screw panel mount or attach optional DIN-rail brackets
    UL, CUL and CE Approval
  • Accepted worldwide
Product Options:

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NK Technologies AS1 Series AC Current Operated Switches, Self-Powered, SmartLED, 1 - 150A Setpoint Range for Fixed Core Units, 1.75 - 150A Setpoint Range for Split Core Units 

'AS1' Series Current Operated Switches from NK Technologies combine a current transformer, signal conditioner and limit alarm into a single package for use in status monitoring or proof of operation applications. Offering an extended setpoint range of 1-150A and universal, solid-state outputs, the selfpowered AS1 can be tailored to provide accurate and dependable digital indication of over-current conditions across a broad range of applications.  Available in solid-core enclosure styles or in a split-core case to maximize ease of installation.

Power SupplyNone—Self-powered
OutputMagnetically isolated solid-state switch
Output Rating• N.O. Version: 0.15 A @ 240 VAC or VDC
• N.C. Version: 0.2 A @ 135 VAC or VDC
• Not polarity sensitive
Off-State Leakage<10 μA
Response Time120 ms
Setpoint Range• Solid-core: 1–150 A (adjustable)
• Split-core: 1.75–150 A (adjustable)
Hysteresis5% of setpoint
• -GO (NOU)
• -GO (NCU)
• All other
• 500 A
• 400 A
• 400 A
• 1000 A
• 1000 A
• 1000 A
Isolation VoltageUL listed to 1270 VAC, tested to 5000 VAC
Frequency Range6–100 Hz
Sensing Aperture• -FF Case: 0.55” (14 mm) dia.
• -FT Case: 0.74” (19 mm) dia.
• -SP Case: 0.85” (21.6 mm) sq.
CaseUL94 V0 Flammability Rated
Environmental-4 to 122°F (-20 to 50°C)
0–95% RH, non-condensing
ListingsUL 508 Industrial Control Equipment
(USA & Canada), CE
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Electronic Proof Of Flow

  • Current operated switch eliminates need for multiple pipe or duct penetrations
  • More reliable than electro-mechanical pressure or flow switches
  • Conveyors

  • Detects jams and overloads
  • Interlocks multiple conveyor sections
  • Lighting Circuits

  • Easier to install and more accurate than photocells
  • Electric Heaters

  • Faster response than temperature sensors