AT-H923 Gebruikershandleiding

INSTALLATION GUIDE
CURRENT MONITORING
AT-H923
AT-H923
Split-Core Current Transducer,
0-10VDC Output
0-20/100/150A (slide-switch selectable)
Induced from monitored current
300VAC RMS
50/60Hz
-15° to 60°C (5° to 140°F)
10 - 90% RH, non-condensing
±2% full scale from 10% to 100% (selected range)
2 sec.
14 AWG
4 in-lbs (0.45 N-m)
CE: EN61010-1:2001-2, CAT III, deg. 2, basic insulation
Agency Approvals
For applications requiring double or reinforced insulation, please contact the factory
quick install
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1. Disconnect and lock out power to the conductor to be monitored.
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2. Plan the installation:
Locate a mounting surface for the removable mounting bracket that will allow
the monitored conductor to pass through the iris, or “window” when it is installed
and keep the product at least 1/2” (13mm) from any uninsulated conductors (CE).
Determine cable routing for the controller connection, allowing wiring to reach
the mounting location.
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3. Install mounting bracket
Drill holes to mount the bracket to the chosen surface using the included screws.
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4. Set the desired amperage range (20, 100, or 150 Amps).
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5. Wire the output connections between the sensor and the controller (0-10VDC).
6. Snap thesensor over the wire to be monitored and clip the assembly to the
mounting bracket.
7. Scale the controller software to match the sensor output.
8. Close up and power up.
DimEnsions
Removable Mounting Bracket
CONTACTOR
1.0”
(25 mm)
CONTROLLER
AI
COMMON
0-10VDC
1.1”
(26 mm)
–
+
0.8”
(21 mm)
Bracket can be mounted
on either side for added
installation flexibility.
3.1”
(79 mm)
2.8”
(70 mm)
1.4”
(36 mm)
Ø = 0.3”
(8 mm)
2.5”
(64 mm)
Fan or Pump
Self-gripping
Iris
3.0”
(76 mm)
Use DIN Rail
Mounting clip
(Veris part
number AH01) to
mount on standard DIN rail.
05092
INSTALLATION GUIDE
opEration
Wiring
The at-h923 is a current transducer which senses current (amperage) in any of three
field-selectable ranges; 0-to-20, 0-to-100, or 0-to-150 amperes. These ranges
represent the maximum current which can be applied to the monitored conductor.
The at-h923 transforms the monitored current into a zero-to-ten volt DC output
suitable for connection to building controllers or other appropriate data acquisition
equipment. The at-h923 requires no external power supply to generate its output.
DDC
CONTROLLER
AI
COMM –
+
0-10VDC Input
Self-Powered Output
The at-h923 housing offers unprecedented mounting flexibility. The mounting bracket
can be attached in three different places. Additionally, the bracket is compatible with
the Veris AH01 DIN Rail clip, allowing DIN mounting.
OUTPUT
0-10VDC
20
100
150
notEs
Don’t use for load currents greater
than sensor maximum rating.
scaling
1. Set range switch.
20
100
150
20
100
150
Amperage Range
Selector Switch
2. Scale controller
software to match
selected output.
10V
SENSOR OUTPUT
DANGER: 5A CTs can present hazardous voltages.
Install CTs in accordance with manufacturer's instructions.
Terminate the CT secondary before applying current.
CAUTION
RISK OF EQUIPMENT DAMAGE
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For load currents less than sensor minimum rating:
Wrap the monitored conductor through the center hole and around the sensor body
to produce multiple turns through the "window." This increases the current measured
by the transducer.
Controller must be
programmed to account for the
extra turns. e.g., if four turns
pass through the sensor (as
shown) the normal controller
reading must be divided by 4.
< 1.5 A (Sensor Min.)
1A
4x
Selected Range
0A
SENSED AMPS
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troublEshooting
Problem
No Reading at Controller
Solution
• Check polarity of sensor output connections
• Check for output voltage at sensor
• Check for amperage in monitored conductor
• Assure that sensor core mating surfaces are clean and
that the core clamp is completely closed
05092
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.