Safety Interlocks
NK Technologies’ Current Operated Switches are available in models that will 
switch at measured currents from just a few milliamps (mA) to over 100 amps. Detecting current flow is the definitive measurement to determine if equipment is on or off, a motor is running or not, a heater is on or off etc. NK’s Current Switch products are installed for interlocking for operational and safety purposes.
Drill/Tool Status
Automated drilling machines usually provide fast and accurate holes, that is until 
the drill bit breaks. The last thing a high production furniture manufacturer wanted to do is to keep drilling parts with one hole missing! NK Technologies’ Current Operated Switches were installed over the current carrying conductor feeding the drill motor and when the amperage dropped below a preset level a signal was sent to the controller to stop operation so that the drill bit could be changed. NK’s range of current transducers are used in a variety of applications on machine tools to detect status.
Welder Tip Dressing
Motor-driven tip dressers are used in conjunction with robotic resistance 
welders in a manufacturing area like an automobile body assembly plant. Essentially they are like large pencil sharpeners and they require regular maintenance. After maintenance the dressers are not always switched back on, so that when the robotic welder requests tip sharpening, the tips are not dressed and poor quality welds result, which in turn produces poor quality panels. By installing an NK Technologies’ Current Operated Switch on the tip dresser the status is signaled and an alarm is generated to warn if the dresser remains un-powered and offline. NK’s unique split-core packaging is ideal for retrofit installation and the compact solid-core unit is well suited for OEM applications.
Solar Panels
Photovoltaic arrays are used primarily in two ways to:
- Charge batteries that are used to power remote loads where installing a connection to the utility grid would be cost prohibitive
- Energize installations where the DC power is converted to 60 HZ AC power through a solid-state inverter
NK Technologies’ DC Current Transducers can be installed so the output of the arrays can be monitored. These transducers are available in bipolar versions so that current may be measured during charging or discharging of the batteries.
Additionally NK Technologies’ Power Transducers can be installed to monitor the voltage, current and frequency output from the inverter.
Isolated Alarm System Interfacing
If an alarm or monitoring system is to be installed adjacent to another, (for 
example: a municipal hurricane or tornado warning system) it is desirable to tie in to it. This can be achieved by the utilization of an NK Technologies’ Current Operated Switch (The split-core version is ideal for this). The switch simply detects current flowing in a conductor to say the audible or visual alarm providing a fully isolated ‘repeater’ signal. Switches are available for both AC and DC applications.
Equipment Ground Fault Monitoring
As we become more aware of occupational health and safety so the need for 
protection against ground faults is growing. Industrial electrical equipment is fed via a distribution system which in turn is connected to a main feed. Ground fault protection may be installed, for instance at a main breaker, protecting the branch circuit but not necessarily a valuable or critical piece of equipment. Industrial Ground Fault Sensors from NK Technologies are designed to be installed in individual pieces of equipment or their electrical feed. The sensors provide an on/off output that may be used to operate a circuit interruption device like a shunt trip breaker or feed into an alarm system. With over 100 models to choose from, there’s sure to be one to fit your application.
Insulation Breakdown
Industrial electrical heaters are prone to ground leakage due to the breakdown or
contamination of insulators. The use of NK Technologies’ Ground Fault Sensors enables early detection of leakage Currents as small as 5mA. The on/off output of the sensor can be used to trigger a circuit interruption device (for example a shunt-trip breaker) or a monitoring device like a PLC to determine the required action. Latching and auto-reset models are available in both normally energized and normally de-energized configurations suitable for most applications.