Veris H948 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.

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.

Fan or Pump

CONTR OLLER

Motor

CONT ACTOR

DI

(Statu s)

DO

(Relay

Co il)

CONTR OL
POWER

INSTALLATION GUIDE

H948 948

Split-Core Current Switch, Adjustable Output,

with Command Relay

Installer’s Specifications

Sensor Power Induced from monitored conductor
Insulation Class 600VAC RMS
Frequency Range 50/60Hz
Temperature Range -15° to 60°C (5° to 140°F)
Humidity Range 10-90% RH, non-condensing
Hysteresis 10% Typical
Terminal Block Maximum Wire Size 14 AWG
Terminal Block Torque (nominal) 4 in-lbs (0.45 N-m)
Agency Approvals UL 508 open device listing

Do not use the LED status indicators as evidence of app lied voltage.

quick install

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

Wiring ExamplE

Z2 01499- 0A PAGE 1 ©2009 Veris Industries USA 800.354.8556 or +1(0)503.598.4564 / [e-mail] 07091

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.

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.

Wire the output connec tions between the sensor and the controller.4.

Snap thesensor over the wire to be monitored and clip the assembly to the 5.

mounting bracket.

Close up and power up.6.

DimEnsions

Use DIN Rail

Mounting clip

(Veris part

number AH01) to

mount on stan-

dard DIN rail.

VERIS INDUSTRIES

H948

4x

1A

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.

A

OK!

!

A

OK!

!

OK!

STATUS

OK!

STATUS

Setpoint

Status

Open

STOP

Setpoint

Status
Closed

STOP

1/4

Setpoint

Setpoint

Status

Closed

STOP

Setpoint

Status

Open

STOP

1/4

Setpoint

OK!

A

OK!

240A

300A:

5A

4A

INSTALLATION GUIDE

opEration

The H948 is a current-sensitive switching device with integral command relay that
monitors current (amperage) in the conductor passing through it. A change in
amperage in the monitored conductor that crosses the switch (setpoint) threshold
plus the hysteresis value will cause the resistance of the status output to change
state, similar to the action of a mechanical switch. This status information can be fed
back to a building controller that interprets the signal and separately switches the
relay. The status output can also be used to switch the relay directly.

In this model, the setpoint is adjustable through the action of a twenty (20) turn
potentiometer (see the CALIBRATION section). The status output is suitable for
connection to building controllers or other appropriate data acquisition equipment
operating at up to 30 volts. The H948 relay requires a 12VDC external power supply
for operation.

The H948 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.

> 135A (Sensor max.)

calibration

Before beginning calibration, establish normal load conditions.

Then choose either A or B below.

A. To monitor under-current (belt loss, coupling shear, status)

1. Turn setpoint screw
clockwise until Status OPEN
LED turns ON.

2. Slowly turn the screw counter-clockwise until the Status CLOSED LED just
turns ON.

3.Turn the screw an
additional ¼ turn

+

counter-clockwise for
operational margin.

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 four turns
pass through the sensor (as
shown) the normal controller
reading must be divided by 4.

Z2 01499- 0A PAGE 2 ©2009 Veris Industries USA 800.354.8556 or +1(0)503.598.4564 / [e-mail] 07091

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.

< 2.5 A (Sensor Min.)

B. To monitor over-current (mechanical problems, seized impeller)

1.Turn setpoint screw
counter-clockwise until Status
CLOSED LED turns ON.

2. Slowly turn the setpoint screw clockwise until the Status OPEN LED just turns ON.

3. Turn the setpoint

+

screw an additional
¼ turn clockwise for
operational margin.

troublEshooting

Problem Solution

No Reading at Controller • Check sensor calibration (see above)

• Check for control voltage at sensor (<30V)

• Check for amperage in monitored conductor (>2.5A)

• Assure that sensor core mating surfaces are clean and

that the core clamp is completely closed

Setpoint screw has no stops The setpoint screw has a slip-clutch at both ends of its

Both LEDs are lit Setpoint screw is too far clockwise. See solution above.

travel to avoid damage. Twenty turns CCW will reset
the sensor to be most sensitive. Repeat calibration
above.