Veris Industries H723HC Install - Manual (Page 2)

6%2)3 INSTALLATION GUIDE H723HC
Z205458-0A PAGE 2 ©2008 Veris Industries USA 800.354.8556 or 503.598.4564 / [email protected] 09083
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< 5A (H723HC min.)
0.5A
10x
50A
Controller: 0.625A/mA + 4mA
Amps ÷ Turns
(5A ÷ 10) = 0.5A
H723HC: 5A max. (10T)
2A
0.5A
300A: 5A
300A
5A
50A
Controller:
CT max ÷ H723HC max
300 ÷ 50 = 6x
10VDC -> 300A
300 A
opEration
The H723HC is a current transducer that senses current (amperage) in any of three
field-selectable ranges: 0-50, 0-100, or 0-200 amperes. These ranges represent
the maximum current that can be applied to the monitored conductor. The H723HC
transforms the monitored current into a 0-10 VDC output suitable for connection to
building controllers or other appropriate data acquisition equipment. The H723HC
requires no 12-30VDC external power to generate its output.
notEs
troublEshooting
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.
DANGER: 5A CTs can present hazardous voltages.
Install CTs in accordance with manufacturer's instructions.
Terminate the CT secondary before applying current.
H681x-5A CT
> 200A (H723HC max.)
For load currents greater than sensor maximum rating:
Use a 5 Amp (H681x series) Current Transformer (CT) as shown.
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
e.g. : 30A ÷ 4 Turns = 7.5 Amps max. in monitored conductor
Failure to follow these instructions can result in overheating
and permanent equipment damage.
0A 50, 100, or 200 A
SENSED AMPS
SENSOR
OUTPUT
10V
0V
10 wraps
Amperage Range
Selector Switch
200
100
50
200
100
50
Problem Solution
No Reading at Controller • 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
calibration/scaling
Set the amperage range selector switch to a level appropriate for your load. The
H723LC is available with three choices, 0-10, 0-20, or 0-40 Amps.
DDC
CONTROLLER
AI
COMM
0-10VDC Input
CAUTION: Consult
instructions prior
to installation
!
Use min. 75º C insulated conductor
ig20
AMPERAGE
RANGE
40
20
10
OUTPUT
0-10VDC
+ –
+
–
Self-Powered Output
Scale the output as shown below.
Wiring