Veris H735 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.

0.2” x 0.15” slot (2x)

1.1"

(27 mm)

2.8"

(68 mm)

0.7" Dia

(19 mm)

0.9" (23 mm)

3.0"

(75 mm)

Removable/Adjustable Mounting Bracket

3.8"

(95 mm)

4.2"

(106 mm)

Fan or Pump

CONTROL LER

(Stat us)

(Relay

C oil)

Motor

CONT ACTOR

CONTR OL

POWER

INSTALLATION GUIDE

H735

735

Solid-Core Current Switch, Adjustable Output,

with Command Relay

Installer’s Speciﬁcations

Sensor Power Induced from monitored current Insulation Class 600VAC rms (UL) Frequency Range 50/60Hz Relay Coil 24VAC/DC 10mA Relay Contact 5A@250VAC/DC, 3A@30VDC, 1/6 hp Temperature Range -15° to 60°C (5° to 140°F) Humidity Range 10-90% RH non-condensing Amperage Range 1-135A continuous Output N.O. 0.1A@30VAC/DC, polarity insensitive Hysteresis 10% of setpoint, typical Oﬀ-State Leakage 1+ MΩ Safety UL 508, CAT III

Do not use the LED status indicators as evidence of app lied voltage. The product design provi des for basic insulation only.

quick install

Disconnect and lock out power.1.

Install the mounting bracket to the back of the electrical enclosure, no closer than 2.

1/2” (12mm) to an uninsulated conductor.

Wiring ExamplE

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.

Slide the conductor to be monitored through the sensing hole of the current 3.

switch. Terminate the conductor. See Notes (page 2) for currents under 1 Amp or above 135 Amps.

Wire the output connec tions to the DDC controller or switched load. Note: 4.

Contacts are solid state and work like dry contacts. When the switch is closed, less than 1 Ω is present. When the switch is open, more than 1 MΩ are present.

Reconnect power.5.

Calibrate the sensor (see Calibration section).6.

DimEnsions

VERIS INDUSTRIES

™

H735

0.5A

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.

OK!

STATUS

OK!

STATUS

Setpoint

Status

Open

STOP

Setpoint

Status Closed

STOP

1/4

Setpoint

Status

Closed

STOP

Setpoint

Status

Open

STOP

1/4

Setpoint

OK!

INSTALLATION GUIDE

opEration

The H735 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 H735 relay requires a 24VAC/VDC external power supply for operation.

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 1/4 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.

< 1 A (Sensor Min.)

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.

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.

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 1/4 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 (> 1A)

• 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.

Relay chatters or will not change

state

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

• Check voltage at relay coil (<24VAC/DC)

• Parallel applications with AC transformers can damage

the relay.