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.
A qualied person is one who has skills and knowledge related to the construction and
operation of this electrical equipment and the installation, and has received safety
training to recognize and avoid the hazards involved. NEC2009 Article 100
No responsibility is assumed by Veris Industries for any consequences arising out of the
use of this material.
DANGER
Current Monitoring
Solid-Core Current Switch, Adjustable Trip Point,
Product Overview
The H706 is a current-sensitive switching device 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 causes the resistance of the solid-state status output to change state, similar to the action of a
mechanical switch. In this model, the setpoint is adjustable through the action of a twenty (20) turn potentiometer
(see the Calibration sec tion). The status output is suitable for connection to building controllers or other
appropriate data acquisition equipment operating at up to 30 volts. The H706 requires 5-30 VDC external power
supply to generate its output.
Specifications
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.
Alta Labs, E nercept, Ensp ector, Hawkeye, Trus tat, Aerospo nd, Veris, and th e Veris ‘V’ log o are tradema rks or registe red tradema rks of Veris Ind ustries, L. L.C. in the USA and /or other countri es.
The product design provides basic insulation only.
Do not use the LED indicators as evidence of applied voltage.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
Installation Guide
Motor
Fan or Pump
DDC CONTROLLER
Insulated Conductor Only
DI
-
-
+
+
-
+
5-30 VDC
Power Supply
CONTACTOR
Current Monitoring
H706
TM
Dimensions
Installation
Removable/Adjustable Mounting Bracket
0.9"
(23 mm)
3.0"
(75 mm)
1.1"
(27 mm)
0.2” x 0.15”
slot (2x)
0.7"
(19 mm)
2.8"
(68 mm)
(95 mm)
4.2"
(106 mm)
3.8"
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 conduc tor to pass through the center
window when it is installed and that will keep the device at least ½”
(13 mm) 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. Wire the output connections from the sensor to the controller (solidstate contact) and to the external power supply. Observe polarity.
4. Route the conductor through the sensor’s center window and slip the
assembly into the mounting bracket.
5. Secure the enclosure and reconnect power.
6. Calibrate the sensor with the load running normally.
Alta Labs, E nercept, Ensp ector, Hawkeye, Trus tat, Aerospo nd, Veris, and th e Veris ‘V’ log o are tradema rks or registe red tradema rks of Veris Ind ustries, L. L.C. in the USA and /or other countri es.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
Installation Guide
Current Monitoring
H706
TM
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.
>135 A (sensor max.)
240A
DANGER: 5A CTs can present
hazardous voltages. Install
5A
4A
300A:
H68 xx-5A CT
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 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) divide the normal reading by 4).
< 1 A (sensor max.)
0.5A
4x
• 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.
Alta Labs, E nercept, Ensp ector, Hawkeye, Trus tat, Aerospo nd, Veris, and th e Veris ‘V’ log o are tradema rks or registe red tradema rks of Veris Ind ustries, L. L.C. in the USA and /or other countri es.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
Installation Guide
Current Monitoring
H706
TM
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 Closed LED turns
on.
2. Slowly turn the screw counter
clockwise until the Status
Open LED turns on.
3. Turn the screw an additional
¼ turn counter clockwise for
operational margin.
¼
Status
Closed
Status
Closed
Status
Closed
Setpoint
Status
Open
Setpoint
Status
Open
Setpoint
Status
Open
B. To monitor over-current (mechanical problems, seized impeller)
1. Turn setpoint screw counter
clockwise until Status Open
LED turns on.
Status
Closed
Setpoint
Status
Open
Troubleshooting
2. Slowly turn the setpoint screw
Setpoint
clockwise until the Status
Status
Closed LED just turns on.
3. Turn the setpoint screw an
Status
Closed
Open
Setpoint
additional ¼ turn clockwise for
Status
operational margin.
¼
Status
Closed
Open
ProblemSolution
No Reading at Controller• Check sensor calibration (see above)
• Check for control power at sensor (5VDC<voltage<30VDC)
• Check for amperage in monitored conductor (>1A)
• Verify correct polarity
Setpoint screw has no stops• The setpoint screw has a slip-clutch at both ends of its travel to avoid damage. Twenty turns CCW will reset
Both LEDs are litUnit is out of calibration. Turn screw 20 turns CCW and recalibrate.
the sensor to be most sensitive. Repeat calibration above.
Alta Labs, E nercept, Ensp ector, Hawkeye, Trus tat, Aerospo nd, Veris, and th e Veris ‘V’ log o are tradema rks or registe red tradema rks of Veris Ind ustries, L. L.C. in the USA and /or other countri es.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
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