VERIS H608 Split Core Current Switch Installation Guide
- June 13, 2024
- VERIS
Table of Contents
VERIS H608 Split Core Current Switch
Product Information
The Split-Core Current Switch, Adjustable Trip Point (model H608) is a current monitoring device designed for electrical equipment. It is used to monitor the amperage of a conductor and provide status output based on the setpoint. The device is suitable for indoor use only and has a maximum amperage range of 0.5 to 175 A continuous. It features an adjustable setpoint of 0.5 A or less and a hysteresis of 10% typical.
The device has a sensor power induced from the monitored conductor and comes with a terminal block for easy wiring connections. It has an insulation class of 600 Vac RMS (UL) and 300 Vac (CE). The off-state resistance represents an open switch with >1 M resistance, while the on-state resistance represents a closed switch with <200 m resistance. The device is not suitable for wet locations.
The Split-Core Current Switch, Adjustable Trip Point is compliant with UL508 open device listing and CE: EN61010-1 Installation Category Cat. III, pollution degree 2 standards. It comes with a removable mounting bracket for easy installation.
Product Usage Instructions
- Disconnect and lock out power to the enclosure containing the conductor to be monitored.
- Choose a suitable surface for mounting the device and drill holes to mount the bracket using the included screws.
- Wire the output connections from the sensor to the controller (solid-state contact).
- Snap the sensor over the conductor and clip the assembly to the mounting bracket. Ensure to remove any paper inhibitor sheet between the contacts.
- Secure the enclosure and reconnect power.
- Calibrate the sensor with the load running normally.
Note: For load currents greater than the sensor’s maximum rating, please consult the product manual or contact the manufacturer.
Split-Core Current Switch, Adjustable Trip Point
Product Overview
The H608 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 FET 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 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 H608 requires no external power supply to generate its output.
Specifications
| Sensor Power | Induced from the monitored conductor |
|---|---|
| Amperage Range | 0.5 to 175 A continuous |
| Status Output Ratings | N.O. 1.0 A @ 30 Vac/dc, not polarity |
sensitive
Insulation Class| 600 Vac RMS (UL); 300 Vac (CE)
Setpoint| Adjustable, 0.5 A or less
Frequency Range| 50/60 Hz
Temperature Range| -15 to 60 °C (5 to 140 °F)
Humidity Range| 10-90% RH non-condensing
Hysteresis| 10% typical
Off State Resistance| Open switch represents >1 MΩ
On State Resistance| Closed switch represents < 200 mΩ
Terminal Block Max. Wire Size| 24 to 14 AWG (0.2 to 2.1 mm2)
Terminal Block Torque| 3.5 to 4.4 in-lbs (0.4 to 0.5 N-m)
Mounting Location| Not suitable for wet locations. For indoor use only.
COMPLIANCE INFORMATION
Agency Approvals| UL508 open device listing, CE: EN61010-1
Installation Category| Cat. III, pollution degree 2
For applications requiring double or reinforced insulation, please contact the
factory.
The product design provides basic insulation only.
Do not use the LED indicators as evidence of applied voltage.
DANGER
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.
A qualified 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. NEC Article 100 No responsibility is assumed by Veris Industries for any consequences arising out of the use of this material.
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.
Dimensions
Installation
Disconnect and lock out power to the enclosure containing the conductor to be monitored.
- 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 product at least ½” (13 mm) from any uninsulated conductors. Determine cable routing for the controller connection, allowing the wiring to reach the mounting location.
- Drill holes to mount the bracket to the chosen surface using the included screws.
- Wire the output connections from the sensor to the controller (solidstate contact).
- Snap the sensor over the conductor and clip the assembly to the mounting bracket. Important: If there is a paper inhibitor sheet between the contacts, remove before use.
- Secure the enclosure and reconnect power.
- Calibrate the sensor with the load running normally.
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.
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 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).
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.
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)
B. To monitor over-current (mechanical problems, seized impeller)
Troubleshooting
| Problem | Solution |
|---|---|
| No Reading at Controller | • Check sensor calibration (see above) |
• Check for control voltage at sensor (<30V, <1A)
• Check for amperage in monitored conductor (> 0.5A)
• 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 travel to avoid damage. Twenty turns CCW will reset the sensor to be
most sensitive. Repeat calibration above.
Both LEDs are lit| Setpoint screw is too far clockwise. See solution above.
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