Veris Industries H923 User manual

CURRENT MONITORING

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.

DANGER

TM

INSTALLATION GUIDE

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 c urrent
Insulation Class 300VAC RMS
Frequency Range 50/60Hz
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% (sele cted 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

Disconnect and lock out power to the enclosure containing the
conductor to be monitored.

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

• 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.

4. Wire the output connections between the sensor and the controller (0-10VDC).

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

CONTACTOR

CONTROLLER

AI

COMMON

0-10VDC

–
+

(26 mm)

3.1”

(79 mm)

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Ø = 0.3”

(8 mm)

1.1”

Removable Mounting Bracket

1.0”

(25 mm)

0.8”

(21 mm)

2.8”

(70 mm)

2.5”

(64 mm)

3.0”

(76 mm)

Bracket can be mounted
on three sides for added
installation exibility.

Self-gripping

Iris

1.4”

(36 mm)

Use DIN Rail

Mounting clip

(Veris part

number AH01) to

mount on stan-

dard DIN rail.

H923

20
100
150

Amperage Range
Selector Switch

20
100
150

AMPERAGE RANGE

AMPERAGE RANGE

SENSOR OUTPUT

Selected Range

0V

0A

10V

SENSED AMPS

DDC

CONTROLLER

AI

COMM

0-10VDC Input

+

–

Self-Powered Output

20
100
150

OUTPUT
0-10VDC

AMPERAGE RANGE

TM

INSTALLATION GUIDE

OPERATION

The H923 is a current transducer that senses current (amperage) in any of three
eld-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.

The H923 housing oers unprecedented mounting exibility. The mounting bracket
can be attached in three dierent places. Additionally, the bracket is compatible with
the Veris AH01 DIN Rail clip, allowing DIN mounting.

NOTES

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.

240A

> 150A (Sensor max.)

5A

4A

300A:

H68xx-5A CT

WIRING

SCALING

1. Set range switch.

DANGER: 5A CTs can present hazardous voltages.
Install CTs in accordance with manufacturer's instructions.
Terminate the CT secondary before applying current.

2. Scale controller

software to match
selected output.

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. : 100A ÷ 4 Turns = 25 Amps max. in monitored conductor

• Failure to follow these instructions can result in overheating
and permanent equipment damage.

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.

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< 1.5 A (Sensor Min.)

1A

4x

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TROUBLESHOOTING

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