Duncan Instruments Canada Ltd
Duncan Instruments Canada Ltd.
Electronic Measurement Solutions since 1968
ISO 9001


STERLING Model ANTS-1 Artifical Neutral Kit (CSA Approved)

The artificial neutral is designed for use on poly-phase ungrounded (Delta) systems. It is powered from the AC line or internal rechargeable battery. It provides an intermittent grounded neutral enabling the detection of fault current on ungrounded networks.

Because the flow of the current is interrupted at periodic intervals it is distinguishable from the load current. Two speeds (fast/slow) of neutral application are provided so that analogue or digital instruments can be used for detection. Three red lights located under the phase inputs indicate the presence or absence of phase voltages. Battery state light above the line input connector shows charge (red) or fully charged battery (green). Adjacent to the speed selector is the relay status light that is green when the relay is operating. In addition there is also a buzzer activated by the relay operation.

Ground Resistance Tester


  • Provide continous operation without interruption & overhead of the resistors
  • Designed for ungrounded networks provides intermittent path to ground for leakage current measurements
  • Works from 100 to 600VAC
  • Red LED phase fault indicator
  • Switch selectable ground fault cycling of 500mS or 2.3 seconds
  • Buzzer alerts each momentary fault
  • Rechargeable battery operated
  • Double insulated, fire retardant case
  • Four color-coded 5 ft 1000V rated leads supplied with alligator clips
  • Works with Model 2620 and other leakage current probes


  • Troubleshoot faulty three-phase ungrounded devices
  • Assist in leakage current measurements on ungrounded systems
  • Create momentary ground conditions to detect fault currents

Kit Supplied with:

  • ANTS-1
  • 2620 Leakage Clamp
  • 4 x 50 foots silcone leads (Red, Black, Blue, Green)
  • Line Cord

Technical Specification

Working Voltage
100 to 600V
45 to 65 Hz
Resistance per Phase
Relay Duty Cycle
Slow: 2.5 seconds- Fast: 0.5 seconds
Operating Voltage
115VAC or 12V rechargeable battery
Typical Battery Life
32 Hours
20.1 x 15.8x 7.6" (51.1 x 40.1 x 19.3 cm)
ABS resin UL94 flame retardant
Operating Temperature
32° to 122°F (0° to 50°C); 10 to 90% RH (non-condensing)
CSA Approved

February 2012.
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