AEMC AN-1 (1971.01) Artificial Neutral

The Artificial Neutral Model AN-1 creates a momentary grounded artificial neutral to enable the fault currents measurement on ungrounded 3-phase systems.

The Artificial Neutral’s intermittently grounded via a relay activated by an internal electronic timer. This technique of periodic grounding conducts 3 functions – limits the insulation faults possibility within the instrument, enables for best discrimination of actual fault current as well as limits overheating of the instrument.

Closure time of relay’s switch selectable, Slow (2.3 seconds) or Fast (0.5 seconds), so that the ground fault clamp can be utilized on a meter with either a digital or analog display. An internal buzzer that’s also run by the relay, is activated whenever the neutral connection’s grounded. 3 LEDs, one for each of the phases, display the presence of each of the 3 phases before measurement. A 4th green LED shows that the instrument’s operating.

• Designed for ungrounded networks — provides intermittent path to ground for leakage current measurements
• Works from 30 to 600VAC
• Red LED phase fault indicator
• Switch selectable ground fault cycling of 500mS or 2.3 seconds
• Buzzer alerts each momentary fault
• 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

• Working Voltage : 30 to 600V
• Frequency : 45 to 65Hz
• Resistance Per Phase : 3.9kΩ ± 5%
• Relay Duty Cycle : Slow: 500ms – Fast: 2.3 seconds
• Power Source : Eight 1.5V AA batteries
• Dimensions : 8.7 x 5.4 x 5.9″ (220 x 136 x 150mm)
• Weight : 2.9 lbs (1.3kg)
• Case : Fire resistant polycarbonate UL94 VO
• Protection Index : IP20
• Operating Temperature : 32° to 122°F (0° to 50°C); 10 to 90% RH (non-condensing)
• Storage Temperature -40° to 158°F (-40° to 70°C); 10 to 90% RH (non-condensing)
• Safety Rating : 600V Cat. III
• Double Insulation : Yes
• CE Mark : Yes

• AEMC AN-1 Datasheet.pdf