H923

H923
INSTALLATION GUIDE
CURRENT MONITORING
TM
H923
TM
923
Split-Core Current Transducer,
0-10VDC Output
Installer’s Specifications
Amperage Range
0-20/100/150A (slide-switch selectable)
Sensor Power
Induced from monitored current
Insulation Class
300VAC RMS
Frequency Range50/60Hz
Temperature Range
-15° to 60°C (5° to 140°F)
Humidity Range
10 - 90% RH, non-condensing
Accuracy
±2% full scale from 10% to 100% (selected range)
Response Time
2 sec.
Terminal Block Maximum Wire Size
14 AWG
Terminal Block Torque (nominal)
4 in-lbs (0.45 N-m)
Agency Approvals
CE: EN61010-1:2001-2, CAT III, pollution degree 2, basic insulation
For applications requiring double or reinforced insulation, please contact the factory
INSTALLATION
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
•
•
•
•
•
Follow safe electrical work practices. See NFPA 70E in the USA, or applicable local codes.
This equipment must only be installed and serviced by qualified electrical personnel.
Read, understand and follow the instructions before installing this product.
Turn off all power supplying equipment before working on or inside the equipment.
Use a properly rated voltage sensing device to confirm power is off.
DO NOT DEPEND ON THIS PRODUCT FOR VOLTAGE INDICATION
• Only install this product on insulated conductors.
Failure to follow these instructions will result in death or serious injury.
1. Locate a mounting surface for the removable mounting bracket that will allow
the monitored conductor to pass through the center window when it is installed
and that will keep the device at least 1/2” from any uninsulated conductors.
Determine cable routing for the controller connection, allowing wiring to reach
the mounting location.
2. Drill holes to mount the bracket to the chosen surface using the included screws.
3. Set the desired amperage range (20, 100, or 150 Amps).
NOTICE
•
•
•
•
Disconnect and lock out power to the enclosure containing the
conductor to be monitored.
4. Wire the output connections between the sensor and the controller (0-10VDC).
This product is not intended for life or safety applications.
Do not install this product in hazardous or classified locations.
The installer is responsible for conformance to all applicable codes.
Mount this product inside a suitable fire and electrical enclosure.
5. Snap the sensor over the conductor to be monitored and clip the assembly to the
mounting bracket.
6. Scale the controller software to match the sensor output.
7. Secure enclosure and reconnect power.
WIRING EXAMPLE
DIMENSIONS
Removable Mounting Bracket
CONTACTOR
1.0”
(25 mm)
CONTROLLER
AI
COMMON
0-10VDC
1.1”
(26 mm)
–
+
3.1”
(79 mm)
Bracket can be mounted
on three sides for added
installation flexibility.
0.8”
(21 mm)
Self-gripping
Iris
2.8”
(70 mm)
1.4”
(36 mm)
Ø = 0.3”
(8 mm)
2.5”
(64 mm)
Fan or Pump
Z202365-0H
PAGE 1
3.0”
(76 mm)
©2012 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected]
Use DIN Rail
Mounting clip
(Veris part
number AH01) to
mount on standard DIN rail.
04122
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.
INSTALLATION GUIDE
H923
TM
OPERATION
WIRING
The H923 is a current transducer that senses current (amperage) in any of three
field-selectable ranges; 0-to-20, 0-to-100, or 0-to-150 Amps. These ranges represent
the maximum current that can be applied to the monitored conductor. The H923
transforms the monitored current into a 0 to 10 VDC output suitable for connection
to building controllers or other appropriate data acquisition equipment. The H923
requires no external power supply to generate its output.
DDC
CONTROLLER
AI
COMM –
0-10VDC Input +
Self-Powered Output
The 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.
AMPERAGE RANGE
20
100
150
NOTES
OUTPUT
0-10VDC
For load currents greater than sensor maximum rating:
Use a 5 Amp (H68xx series) Current Transformer (CT) as shown. This technique can be
combined with wrapping (see below) to add range for a low current load on a high
current source.
SCALING
1. Set range switch.
240A > 150A (Sensor max.)
AMPERAGE RANGE
20
100
150
AMPERAGE RANGE
20
100
150
300A:5A
4A
H68xx-5A CT
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.
Amperage Range
Selector Switch
CAUTION
RISK OF EQUIPMENT DAMAGE
• Derate the product’s maximum current for the number of turns
through the sensing window using the following formula.
Rated Max. Amps ÷ Number of Turns = Max. monitored Amps
0V
e.g. : 100A ÷ 4 Turns = 25 Amps max. in monitored conductor
For load currents less than sensor minimum rating:
Wrap the monitored conductor through the center window and around the sensor
body to produce multiple turns. This increases the current measured by the
transducer.
Program the controller to
account for the extra turns,
e.g., if four turns pass through
the sensor (as shown) then
divide the normal controller
reading by 4.
Z202365-0H
PAGE 2
< 1.5 A (Sensor Min.)
1A
4x
Selected Range
0A
SENSED AMPS
• Failure to follow these instructions can result in overheating
and permanent equipment damage.
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
©2012 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected]
04122
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.
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