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NK Technologies AG Series Ground Fault Sensors
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NK Technologies AG Series
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Features:
- Operation to Match Your Application:
Latching - For controlling contactors.
Auto-Reset - For controlling shunt trip breakers.
- Setpoint Options to Match Your Needs:
Tri-Set - Field select 5, 10 or 30mA. Fast and convenient. (AG3 only)
Single-Set - Factory adjusted setpoint. Specify 5–100mA (AG1) or 80–950mA (AG2) when ordering.
- Compatible with Standard Equipment
Works on 1F or 3F power. Controls standard shunt trip breakers or contactors. Tie into Emergency Circuits (EMO/EPO).
- Isolated
Magnetically isolated from the monitored circuit and control power
- UL and CE Approval
Accepted worldwide.
Applications:
- Personnel Protection (typically 5mA)
Senses low fault currents and alarms to shut power before injury occurs.
- Equipment Protection (typically 30mA)
When personal protection is not an issue, select a higher setpoint to protect equipment or product.
- Regulatory Approval
Meet requirements by industry groups and governments for Ground Fault Protection.
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| Model |
Description |
List Price |
Sale Price |
| AG1-CR1-ppp*-LA-sss* |
5-100 mA Range, Relay Output, Latching, Output: SPDT,0.5A @ 120 VAC, 2A @ 30 VDC |
$325.00 |
| $289.25 |  |
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| AG1-NCAC-ppp*-FS-sss* |
5-100 mA Range, Solid State Output, Normally Energized, Output: N.C., 1 A @ 240 VAC |
$225.00 |
| $200.25 | |
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| AG1-NCAC-ppp*-NF-sss* |
5-100 mA Range, Solid State Output, Norm. De-Energized, Output: N.C., 1 A @ 240 VAC |
$210.00 |
| $186.90 | |
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| AG1-NCDC-ppp*-FS-sss* |
5-100 mA Range, Solid State Output, Normally Energized, Output: N.C., 0.15A @ 30VDC |
$225.00 |
| $200.25 | |
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| AG1-NCDC-ppp*-NF-sss* |
5-100 mA Range, Solid State Output, Norm. De-Energized, Output: N.C., 0.15A @ 30VDC |
$210.00 |
| $186.90 | |
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| AG1-NCR1-ppp*-LA-sss* |
5-100 mA Range, Latching, Output: N.C. 1A @ 120 VAC, 2A @ 30 VDC |
$325.00 |
| $289.25 | |
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| AG1-NCR-ppp*-FS-sss* |
5-100 mA Range, Relay Output, Normally Energized, Output: N.C., 0.5A @ 120 VAC, 2A @ 30 VDC |
$235.00 |
| $209.15 | |
|
| AG1-NCR-ppp*-NF-sss* |
5-100 mA Range, Relay Output, Norm. De-Energized, Output: N.C., 0.5A @ 120 VAC, 2A @ 30 VDC |
$225.00 |
| $200.25 | |
|
| AG1-NOAC-ppp*-FS-sss* |
5-100 mA Range, Solid State Output, Normally Energized, Output: N.O., 1 A @ 240 VAC |
$225.00 |
| $200.25 | |
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| AG1-NOAC-ppp*-NF-sss* |
5-100 mA Range, Solid State Output, Norm. De-Energized, Output: N.O., 1 A @ 240 VAC |
$210.00 |
| $186.90 | |
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| AG1-NODC-ppp*-FS-sss* |
5-100 mA Range, Solid State Output, Normally Energized, Output: N.O., 0.15A @ 30VDC |
$225.00 |
| $200.25 | |
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| AG1-NODC-ppp*-NF-sss* |
5-100 mA Range, Solid State Output, Norm. De-Energized, Output: N.O., 0.15A @ 30VDC |
$210.00 |
| $186.90 | |
|
| AG1-NOR1-ppp*-LA-sss* |
5-100 mA Range, Latching, Output: N.O. 1A @ 120 VAC, 2A @ 30 VDC |
$325.00 |
| $289.25 | |
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| AG1-NOR-ppp*-FS-sss* |
5-100 mA Range, Relay Output, Normally Energized, Output: N.O.,0.5A @ 120 VAC, 2A @ 30 VDC |
$235.00 |
| $209.15 | |
|
| AG1-NOR-ppp*-NF-sss* |
5-100 mA Range, Relay Output, Norm. De-Energized, Output: N.O.,0.5A @ 120 VAC, 2A @ 30 VDC |
$220.00 |
| $195.80 | |
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| AG1-SDT1-ppp*-DEN-sss* |
5-100 mA Range, Normally De-Energized, Output: SPDT 1A @ 120 VAC, 2A @ 30 VDC |
$210.00 |
| $186.90 | |
|
| AG1-SDT1-ppp*-ENE-sss* |
5-100 mA Range, Normally Energized, Output: SPDT 1A @ 120 VAC, 2A @ 30 VDC |
$220.00 |
| $195.80 | |
|
| AG2-CR1-ppp*-LA-sss* |
80-950 mA Range, Relay Output, Latching, Output: SPDT, 0.5A @ 120 VAC, 2A @ 30 VDC |
$305.00 |
| $271.45 | |
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| AG2-NCAC-ppp*-FS-sss* |
80-950 mA Range, Solid State Output, Normally Energized, Output: N.C., 1 A @ 240 VAC |
$220.00 |
| $195.80 | |
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| AG2-NCAC-ppp*-NF-sss* |
80-950 mA Range, Solid State Output, Norm. De-Energized, Output: N.C., 1 A @ 240 VAC |
$205.00 |
| $182.45 | |
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| AG2-NCDC-ppp*-FS-sss* |
80-950 mA Range, Solid State Output, Normally Energized, Output: N.C., 0.15A @ 30 VDC |
$220.00 |
| $195.80 | |
|
| AG2-NCDC-ppp*-NF-sss* |
80-950 mA Range, Solid State Output, Norm. De-Energized, Output: N.C., 0.15A @ 30 VDC |
$205.00 |
| $182.45 | |
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| AG2-NCR1-ppp*-LA-sss* |
80-950 mA Range, Latching, Output: N.C. 1A @ 120 VAC, 2A @ 30 VDC |
$305.00 |
| $271.45 | |
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| AG2-NCR-ppp*-FS-sss* |
80-950 mA Range, Relay Output, Normally Energized, Output: N.C., 0.5A @ 120 VAC, 2A @ 30 VDC |
$230.00 |
| $204.70 | |
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| AG2-NCR-ppp*-NF-sss* |
80-950 mA Range, Relay Output, Norm. De-Energized, Output: N.C., 0.5A @ 120 VAC, 2A @ 30 VDC |
$215.00 |
| $191.35 | |
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| AG2-NOAC-ppp*-FS-sss* |
80-950 mA Range, Solid State Output, Normally Energized, Output: N.O., 1 A @ 240 VAC |
$220.00 |
| $195.80 | |
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| AG2-NOAC-ppp*-NF-sss* |
80-950 mA Range, Solid State Output, Norm. De-Energized, Output: N.O., 1 A @ 240 VAC |
$205.00 |
| $182.45 | |
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| AG2-NODC-ppp*-FS-sss* |
80-950 mA Range, Solid State Output, Normally Energized, Output: N.O., 0.15A @ 30 VDC |
$220.00 |
| $195.80 | |
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| AG2-NODC-ppp*-NF-sss* |
80-950 mA Range, Solid State Output, Norm. De-Energized, Output: N.O., 0.15A @ 30 VDC |
$205.00 |
| $182.45 | |
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| AG2-NOR1-ppp*-LA-sss* |
80-950 mA Range, Latching, Output: N.O. 1A @ 120 VAC, 2A @ 30 VDC |
$305.00 |
| $271.45 | |
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| AG2-NOR-ppp*-FS-sss* |
80-950 mA Range, Relay Output, Normally Energized, Output: N.O., 0.5A @ 120 VAC, 2A @ 30 VDC |
$230.00 |
| $204.70 | |
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| AG2-NOR-ppp*-NF-sss* |
80-950 mA Range, Relay Output, Norm. De-Energized, Output: N.O., 0.5A @ 120 VAC, 2A @ 30 VDC |
$215.00 |
| $191.35 | |
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| AG2-SDT1-ppp*-DEN-sss* |
80-950 mA Range, Normally De-Energized, Output: SPDT 1A @ 120 VAC, 2A @ 30 VDC |
$205.00 |
| $182.45 | |
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| AG2-SDT1-ppp*-ENE-sss* |
80-950 mA Range, Normally Energized, Output: SPDT 1A @ 120 VAC, 2A @ 30 VDC |
$220.00 |
| $195.80 | |
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| AG3-CR1-ppp*-LA-TR3 |
5, 10, 30 mA Setpoint, Relay Output, Latching, Output: SPDT, 0.5A @ 120 VAC, 2A @ 30 VDC |
$300.00 |
| $267.00 | |
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| AG3-NCAC-ppp*-FS-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. Energized, Output: N.C., 1 A @ 240 VAC |
$215.00 |
| $191.35 | |
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| AG3-NCAC-ppp*-NF-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. De-Energized, Output: N.C., 1 A @ 240 VAC |
$200.00 |
| $178.00 | |
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| AG3-NCDC-ppp*-FS-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. Energized, Output: N.C., 0.15A @ 30VDC |
$215.00 |
| $191.35 | |
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| AG3-NCDC-ppp*-NF-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. De-Energized, Output: N.C., 0.15A @ 30VDC |
$200.00 |
| $178.00 | |
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| AG3-NCR1-ppp*-LA-TR3 |
5, 10, 30 mA Setpoint, Latching, Output: N.C. 1A @ 120 VAC, 2A @ 30 VDC |
$300.00 |
| $267.00 | |
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| AG3-NCR-ppp*-FS-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. Energized, Output: N.C., 0.5A @ 120 VAC, 2A @ 30 VDC |
$225.00 |
| $200.25 | |
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| AG3-NCR-ppp*-NF-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. De-Energized, Output: N.C., 0.5A @ 120 VAC, 2A @ 30 VDC |
$210.00 |
| $186.90 | |
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| AG3-NOAC-ppp*-FS-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. Energized, Output: N.O., 1 A @ 240 VAC |
$215.00 |
| $191.35 | |
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| AG3-NOAC-ppp*-NF-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. De-Energized, Output: N.O., 1 A @ 240 VAC |
$200.00 |
| $178.00 | |
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| AG3-NODC-ppp*-FS-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. Energized, Output: N.O., 0.15A @ 30 VDC |
$215.00 |
| $191.35 | |
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| AG3-NODC-ppp*-NF-TR3 |
5, 10, 30 mA Setpoint, Solid State Output, Norm. De-Energized, Output: N.O., 0.15A @ 30 VDC |
$200.00 |
| $178.00 | |
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| AG3-NOR1-ppp*-LA-TR3 |
5, 10, 30 mA Setpoint, Latching, Output: N.O. 1A @ 120 VAC, 2A @ 30 VDC |
$300.00 |
| $267.00 | |
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| AG3-NOR-ppp*-FS-TR3 |
5, 10, 30 mA Setpoint, Relay Output, Norm. Energized, Output: N.O., 0.5A @ 120 VAC, 2A @ 30 VDC |
$225.00 |
| $200.25 | |
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| AG3-NOR-ppp*-NF-TR3 |
5, 10, 30 mA Setpoint, Relay Output, Norm. De-Energized, Output: N.O., 0.5A @ 120 VAC, 2A @ 30 VDC |
$210.00 |
| $186.90 | |
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| AG3-SDT1-ppp*-DEN-TR3 |
5, 10, 30 mA Setpoint, Normally De-Energized, Output: SPDT 1A @ 120 VAC, 2A @ 30 VDC |
$200.00 |
| $178.00 | |
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| AG3-SDT1-ppp*-ENE-TR3 |
5, 10, 30 mA Setpoint, Normally Energized, Output: SPDT 1A @ 120 VAC, 2A @ 30 VDC |
$215.00 |
| $191.35 | |
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AG Series sensors from NK Technologies protect people, products and processes from ground faults by monitoring all current-carrying wires in grounded single or 3-phase systems.
Operating Principle: Under normal conditions, the current in the hot leg of a two-wire load is equal in strength but opposite in sign to the current in the neutral leg. These two currents create magnetic fields that are also equal but opposite. When the wires are next to each other, the fields cancel, producing a "Zero Sum Current". If any current leaks to ground from one wire (Ground Fault), the two currents become imbalanced and the result is a net magnetic flux or field. AG Series ground fault sensors monitor this field and alarm when leakage rises above setpoint. This concept applies to grounded 3-phase delta and wye systems.
Specifications:
| Setpoint Range |
| Single-Set Models |
Factory adjusted and sealed (field adjustment possible) |
| AG1: 5-100mA, specify when ordering |
| AG2: 80-950mA, specify when ordering |
| Tri-Set Models |
5, 10 & 30mA jumper select |
| Output |
Isolated dry contact (solid state or relay, see Ordering Information) |
| Output Rating |
Solid State AC Switch: 1A @ 240VAC
Solid State DC Switch: 0.15A 30VDC
Relay: 0.5A @ 125VAC, 2A @VDC |
| Off State Leakage |
None |
| Response Time |
200mS @ 5% above setpoint
60mS @ 50% above setpoint
15mS @ 500% above setpoint |
| Isolation Voltage |
Up to 1,250VAC (monitored circuit) |
| Frequency Range |
50?400Hz (monitored circuit) |
| Sensing Aperture |
0.75" (19mm) dia., up to 4" (100mm) dia. available, consult factory. |
| Power Supply |
120, 200, 208, 220, 240VAC, 50-400Hz, operates from 55-110% of nominal voltage
24VAC & 24VDC, operates +/-10%
Green LED = power (all models) |
| Case |
UL 94V-O Flammability rated |
| Environmental |
5 to 158°F (-15 to 70°C), 0-95% RH, non-condensing |
| Safety |
UL 1053, Class 1 Recognized, CE* |
*Most option combinations are UL recognized.
| Normally Energized Models (-FS Option) |
Protection from faults and loss of control power.
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Control Power Applied |
| No Power |
No Fault |
Fault |
| N.C. Normally Closed |
Closed |
OPEN |
Closed |
| N.O. Normally Open |
Open |
CLOSED |
Open |
| Normally Deenergized Models (-NF Option) |
Protection from faults only when control power is applied.
|
Control Power Applied |
| No Power |
No Fault |
Fault |
| N.C. Normally Closed |
Closed |
CLOSED |
Open |
| N.O. Normally Open |
Open |
OPEN |
Closed |
| Latching (-LA Option) |
Latching models initially power up in the Reset position. If there is a fault or the test button is pressed, the output switches and is latched. The output will remain latched after the fault is cleared, even if control power is removed. To reset the output, apply a momentary contact across the "Reset" terminals (6-7).
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