Veris H921 Installation Instructions

VERIS INDUSTRIES

™

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

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.

Fan or Pump

CONTROLLER

4-20m A DC

Analog

Input

MOTOR

CONTACTOR

Removable Mounting Bracket

Self-gripping

Iris

1.0”

(25 mm)

0.8”

(21 mm)

1.1”

(26 mm)

3.1”

(79 mm)

2.8”

(70 mm)

Ø = 0.3” (8 mm)

1.4”

(36 mm)

2.5”

(64 mm)

3.0”

(76 mm)

Bracket can be mounted on either side for added installation ﬂexibility.

INSTALLATION GUIDE

H921 921

Split-Core Current Transducer

4-20mA Output

Installer’s Speciﬁcations

Sensor Power 30mA (max.)@12-30VDC Insulation Class 600VAC rms (UL), 300VAC rms (CE) Frequency 50/60 Hz Temperature Range -15° to 60°C (5° to 140°F) Humidity Range 10-90% RH non-condensing Amperage Range 0-30/60/120 Amps (slide-switch selectable) Output 4 -20mA DC Hysteresis 10% of setpoint, typical Oﬀ-State Leakage 1+ MΩ Safety UL 508, IEC 61010-1: 2001 CAT III

Speciﬁcation Note: For CE compliance, conductor sha ll be insulated according to IEC 61010‑1:2001, Installation Category III o r equivalent. The product design provi des for basic insulation only.

Quick install

Wiring ExamplE

Disconnect and lock out power to the conductor to be monitored. 1.

Plan the installation: 2.

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 ½” (13mm) from any uninsulated conductors (CE). Determine cable routing for the controller connection, allowing wiring to reach the mounting location.

Install mounting bracket 3.

Drill holes to mount the bracket to the chosen surface using the included screws.

Set the desired amperage range (30, 60, or 120 Amps).4.

Wire the output connec tions between the sensor and the controller (4-20mA).5.

Snap the sensor over the wire to be monitored and clip the assembly to the 6.

mounting bracket.

Scale the controller software to match the selected output.7.

DimEnsions

Alta Labs, Enercep t, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘ V’ logo are trademark s or registered tradema rks of Veris Industries, L.L .C. in the USA and/or othe r countries.

Use DIN Rail

Mounting clip

(Veris part

number AH01) to

mount on stan‑

dard DIN rail.

VERIS INDUSTRIES

™

H921

240A

300A:

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.

DDC

CONTROLLER

12-30VDC

Power Supply

120

60 30

DDC

CONTROLLER

COMM

4-20mA Out

120

60 30

DDC

CONTROLLER

V(COM)

4-20mA in Return

120

60 30

120

60 30

Amperage Range Selector Switch

120

60 30

SENSED AMPS

Selected Range*

4mA

20mA

SENSOR OUTPUT

*Factory calibrated ranges selected

with the amperage range switch

INSTALLATION GUIDE

opEration

The H921 is a current transducer that senses current (amperage) in any of three ﬁeld-selectable ranges; zero-to-thirty, zero-to-sixty, or zero-to-one hundred twenty amperes. These ranges represent the maximum current that can be applied to the monitored conductor. The H921 transforms the monitored current into 4-20mA DC output suitable for connection to building controllers or other appropriate data acquisition equipment. The H921 requires 12-30VDC external power to generate its output.

The H921 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.

notEs

For load currents greater than sensor maximum rating:

Use a 5 Amp (H68xx series) Current Transformer (CT) as shown.

> 120A (Sensor max.)

Wiring

External Power

Sourcing Panel

(‑Common)

Sinking Panel

(+Common)

H68xx‑5A CT

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

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 three turns pass through the sensor (as shown) the normal controller reading must be divided by 3.

Alta Labs, Enercep t, Enspector, Hawkeye, Trustat, Veris, and the Veris ‘ V’ logo are trademark s or registered tradema rks of Veris Industries, L.L .C. in the USA and/or othe r countries.

< 3 A (Sensor Min.)

*A resistor can be added in parallel to convert the 4‑20mA signal to a VDC signal (250 ohm= 1‑5VDC); (500 ohm = 2‑10VDC)

scaling

Set range switch.1.

Scale controller 2.

software to match selected output.

troublEshooting

Problem Solution

No Reading at Controller •Conrm that you have 12-30VDC in series with the

sensor output terminals and the control panel analog input

• Assure that sensor core mating surfaces are clean and

that the core clamp is completely closed.

• Check polarity of sensor output connections