NK TECHNOLOGIES AG3 Series User manual

INSTRUCTIONS
1. Runallcurrentcarryingconductorsthrough
detector window
A. Use anauxiliaryCTifconductors do notfit. Consult
Factory for CT selection.
2. Mount the detector to a surface if needed.
3. Connect output & power wiring.
A. Use up to 14 AWG copper wires.
B. Make sure power and load matches those shown on
the senors’label.
4. Test
A. Pressing the “TEST” button tests the detectors
internal circuits. CAUTION: The output and any
connected loads will switch!
AG 1-SDT1 -120-ENE -005
Model Number KeySpecifications
Know Your Power Quick “How To” Guide
Power Supply Notes
AG1, 2 & 3 SERIES
Ground Fault Detectors
with Relay Outputs, Auto-Reset
AG-Relay Inst. Rev 5- 6/13, P/N 49-010-0001
Output Type
SDT1 SPDT Relay (Form C)
1A @ 120 VAC, 2A @ 30 VDC
Power Supply
24U 24 VAC/DC
120 120 VAC
200 200 VAC
208 208 VAC
240 240 VAC
Setpoint Range
1 5-100mA, Adjustable
2 80-950mA, Adjustable
3 Tri-Set, 5, 10 & 30 mA, Jumper Select
AG Series Ground Fault Detector
Options
ENE Normally Energized
DEN Normally De-energized
Setpoint
005 to 950 Factory Adjusted
Setpoint in mA (specify
when ordering)
TR3 Tri-Set, 5, 10 & 30 mA,
Jumper Select
Setpoint Range AG1 Series: 5-100mA Field Adjustable
AG2 Series: 80-950mA Field Adjustable
AG3 Series: Tri-Set, 5, 10 & 30 mA, Jumper
Select
Voltage Range Up to 1,500 VAC (Monitored Circuit)
Frequency Range 50-400Hz (Monitored Circuit)
Output Options (See Product Label)
Relay Output 1.0A @ 120 VAC, 2A @ 30 VDC
Solid State AC Switch NOT COVERED
Solid State DC Switch NOT COVERED
Response Time 150 mS @ 5% above setpoint.
100 mS @ 50% above setpoint.
Power Supply Operates from 55-110% of nominal
voltage
Nominal Voltages 120, 200, 208, 240 VAC (50-400 Hz)
Green LED=Power
Optional Power 24VAC or 24 VDC Operates +/- 20%
Power Consumption 2.5 Watts
Dimensions 2.5”H x 2.8”W x 1.5”D, (64x71x38mm),
aperture 0.75” (19mm) dia.
Case UL 94V-O Flammability Rated
Environmental 5 to158 DegF (-15 to 70 DegC), 0-95% RH,
Non Condensing
Listings UL 1053, Class 1 Recognized, UR-C, CE
Certified, RoHS Compliant
System Grounding
3511 Charter Park Drive, San Jose, CA 95136
800-959-4014 or [phone] Phone
[phone] FAX
[email protected], www.nktechnologies.com
Know Your Power
Other NK Technologies Products Include:
AC & DC Current Transducers
AC & DC Current Operated Switches
1φ& 3φ Power Transducers
Current & Potential Transformers (CTs&PTs)
Alllow-currentGround-FaultDetectorsaresensitivedevices
that require reasonable care in system design to avoid false
trips caused by high electrical noise levels. Keep in mind
that the best way to reduce noise in a system is to suppress
it at its source.
1. Keep the detector power isolated from noisy circuits.
2. Do not power the detector with the same circuit that
switches contactors or other high current, inductive
Good design practice and code require that all AC power
systems be grounded. AG Series detectors are designed to
workongroundedAC powersystems. Theymay notoperate
properly on ungrounded systems.
AG1 2 &
3
3
3
3
3
3
3
S
S
S
S
S
S
ERIES

Normally Energized Models (-ENE) Detects Ground Faults and loss of control power
CONTROL POWER APPLIED
NO POWER No Fault Fault Detected
Output Output LED Output LED Output LED
N.C. Normally Closed CLOSED Off OPEN OFF CLOSED ON
N.O. Normally Open OPEN Off CLOSED OFF OPEN ON
Normally De-Energized Models (-DEN) Detects Ground Faults only.
CONTROL POWER APPLIED
NO POWER No Fault Fault Detected
Output Output LED Output LED Output LED
N.C. Normally Closed CLOSED Off CLOSED OFF OPEN ON
N.O. Normally Open OPEN Off OPEN OFF CLOSED ON
Description
Operation
Principal of Operation
Under normal conditions, the current in one wire of a two
wire load is equal in strength but opposite in sign to the cur-
rent in the other wire. The two wires create magnetic fields
that cancel, acondition known as“Zero Sum Current”.If any
current leaks to ground (Ground Fault), the two currents be-
come unbalanced and there is a net resulting magnetic field.
The AG detector detects this minute field and changes the
output state. This concept extends to three phase systems
such as 3 wire Delta and to 4 wire Wye.
AG Series detectors work in the same environment as mo-
tors, contactors, heaters, pull-boxes, and other electrical
enclosures. They can be mounted in any position or hung
directly on wires with a wire tie. Just leave at least one inch
distance between detector and other magnetic devices.
Runall current carrying conductors throughthe detectorape-
ture in the same direction. (See “Principal of Operation”)
Connect power wiringto the detector. Be sure that the power
supply matches the power rating on the detector label. Use
up to 14 AWG copper wire and tighten terminals to 4.5
inch-pounds torque.
Connect output wiring to the detector. Be sure that the
Installation & Wiring
output load is less than or equal to the output rating on the
detector label. Use up to 14 AWG copper wire and tighten
terminals to 4.5 inch-pounds torque.
To test operation,gently pressthe
TEST button. This simulates a
faultandteststhe internalswitch-
ing circuits. You should observe
the following operation.
CAUTION: Any circuit con-
nected to the detector will be
operated.
Power Output
GX
Control Power
Match Detector
Rating
(See Label)
Setpoint Adjust
(AG1&2) Factory calibrat-
ed & covered. Remove
cover, adjust & relabel if
required.
AG3 Move jumper to select
setpoint.
Load
Contactor, Relay, Shunt Trip
Breaker, etc.
Do not exceed Rating (See
Label) Output Power
Match Detector
Rating
(3-4 Normally Open,
4-5 Normally Closed)
1A@125VAC or 2A
TEST
Setpoint Adjustment
AG Series detectors monitor all current carrying wires in
single or three phase systems to detect ground faults. They
provide a contact output that can operate relays, contactors
or signal automation systems.
AG1 &AG2 Series detectors are factory calibrated to trip
atthesetpointspecifiedat thetimeorder. We highly recom-
mend leaving this factory calibrated setpoint alone. If you
must change the factory setpoint, follow these steps:
A. Setup
Connect control power and output circuits. Run a conduc-
tor through the aperture with current equal to your desired
set point .
B. Adjust Setpoint to Maximum
Remove the Setpoint Cover. Turn the adjustment pot 5
revolutions CCW (Counter Clockwise) to the maximum
(least sensitive) setpoint. The Status LED should be OFF.
The adjustment pot has a slip clutch so you cannot feel or
damage the end point.
C. Dial in new Setpoint
Turn the pot slowly CW (Clockwise) until the LED turns
ON. The detector is now adjusted to trip at the current that
is passing through the aperture. Reset the detector.
D. Relabel Detector
Relabelthedetectorwiththenewsetpoint. Usealabelmaker
or tape with a permanent marker.
AG3 Move the jumper to the desired setpoint as shown
on the label.
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R
Power Status