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| Back to NK
Technologies Main Selection Page |
| AC and DC Current Switches |
| AS1 Series, Single-Range AC Current Switch |
| AS1 DODC
Series, Current Switch with Dual Output |
| AS3 Series, Multi-Range AC Current Operated Switches |
| ASM Series,
Self-Calibrating AC Current Switches |
| ASX Series, AC Current Switches with Time Delay |
| ASXP Series,
Powered AC Current Switches with Time Delay |
| AS0 Series, Low Range AC Current Operated Switches |
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DS3 Series, DC
Current Operated Switches |
| AC and DC Current
Transducers |
| AT Series, AC Current Transducers, Average Responding |
| ATR Series, AC
Current Transducers, True RMS |
| AT/ATR 3 & 4 Series, High Current AC Transducers |
| ATP Series, Powered
AC Current Transducers |
| ATP/ATPR 3 & 4 Series, Powered AC Current Transducers, True
RMS |
| DT Series, DC Current
Transducers |
| Ground Fault / Earth Leakage
Sensors |
| AG Series, Ground Fault/Earth Leakage Sensors - Solid-State
Relay Output |
| AG Series, Ground
Fault/Earth Leakage Sensors - Mechanical Relay Output |
| AGL Series, Large Aperture Ground Fault
Sensors |
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| NK Technologies - ASX Series Time-Delay AC Current Switches |
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| ASX Series Current Operated Switches are high performance current-operated switches with field-adjustable time delay to help minimize nuisance trips during start-up and operation. Designed for motor status applications where setpoint accuracy and repeatability are critical, the ASX Series offers a linear setpoint characteristic and constant hysteresis. Standard features include self-powering, jumper-selectable ranges and a choice of outputs and cases. |
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Download Complete Specifications in .pdf Format |
Motor Protection
- Serves as an electronic proof-of-operation;
detects current draw changes in motors when they encounter problems such as
pumps running dry or pending bearing failure.
- Non-intrusive, less expensive to install
than differential pressure flow sensors or thermal switches.
- Much quicker response time than Class 10
overload relays.
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High Inrush or Temporary Overload Current
Adjustable start-up/delay timer allows 0–15 second delay to eliminate nuisance trips from high inrush or short overload conditions. |
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- Adjustable Start-up/Delay Timer -
Field-adjustable from 0–15 seconds to eliminate nuisance alarms due to
start-up inrush or temporary overcurrent conditions.
- Choice of N.O./N.C. AC or Universal Outputs
- Contact ratings of 1.0A @ 240VAC or universal outputs of 0.15A @ 240VAC/VDC
(N.O. models) and 0.2A @ 135VAC/VDC (N.C. models) for use with most standard
motor control systems.
- Improved Ease of Installation and Use
- 1.0A AC rating eliminates need for time
delay relay.
- Self-powered, split-core models
simplify installation.
- Status LED provides visual indication
of setpoint trip and contract action.
- Industrial Grade Performance - Constant hysteresis and linear response characteristic enhance setpoint accuracy.
- Agency Approved - UL listed, CE pending.
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| Power Supply |
None — Self-powered |
| Output |
Isolated Solid-State Switch |
| Output Rating |
- NOAC/NCAC: 1A @ 240VAC
- NOU: 0.15A @ 240VAC or VDC
- NCU: 0.2A @ 135VAC or VDC
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| Off State Leakage |
<10µA |
| Response Time |
Adjustable 0.2 to 15 Seconds |
| Setpoint Range |
Jumper Selectable: 1.5–12A, 12–55A, 50–200A |
| Hysteresis |
5% (constant) |
| Overload |
- 1.5–12A Range: 600A Maximum
- 12–55A Range: 800A Maximum
- 50–200A Range: 1,200A Maximum
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| Isolation Voltage |
5,000VAC (tested) |
| Frequency Range |
50–100Hz |
| Case |
UL 94V-O Flammability Rated |
| Environmental |
5 to 122°F (-15 to 50°C) 0–95%RH, non-condensing |
| Listings |
UL 508 Industrial Control Equipment (USA & Canada), CE pending. |
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| Ordering Information |
Download Complete Specifications in .pdf Format |
| Solid-Core Models |
| Model |
Description |
Output |
 ASX-NOU-FT |
Adj. Setpoint 1.5–12, 12–55, and 50–175A |
N.O., 0.15A@240VAC |
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ASX-NCU-FT |
Adj. Setpoint 1.5–12, 12–55, and 50–175A |
N.C., 0.2A@135VDC |
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ASX-NOAC-FT |
Adj. Setpoint 1.5–12, 12–55, and 50–175A |
N.O., 1A@240VAC |
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ASX-NCAC-FT |
Adj. Setpoint 1.5–12, 12–55, and 50–175A |
N.C., 1A@240VAC |
| Split-Core Models |
| Model |
Description |
Output |
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ASX-NCU-SP |
Adj. Setpoint 2–12, 12–55, and 50–200A |
N.C., 0.2A@135VDC |
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ASX-NOU-SP |
Adj. Setpoint 2–12, 12–55, and 50–200A |
N.O., 0.15A@240VAC |
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ASX-NOAC-SP |
Adj. Setpoint 2–12, 12–55, and 50–200A |
N.O., 1A@240VAC |
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ASX-NCAC-SP |
Adj. Setpoint 2–12, 12–55, and 50–200A |
N.C., 1A@240VAC |
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