Caution, Installation guide, Product overview – Veris Industries H300 Install User Manual

Page 2: Troubleshooting

INSTALLATION GUIDE

H300

Z205622-0B

PAGE 2

03133

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240A

300A:

PRODUCT OVERVIEW

The H300 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 threshold causes the resistance of the FET status output
to change state, similar to the action of a mechanical switch. In this model, the
threshold is fixed at 150 mA AC max. The status output is suitable for connection to
building controllers, or other appropriate data acquisition equipment operating at up
to 30 volts. The H300 requires no external power supply to generate its output.

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) when added range is desired for a low current
load on a high current source.

TROUBLESHOOTING

Problem

Solution

No Reading at Controller

• Check for control voltage at sensor (<30V)
• Check for amperage in monitored conductor (> 0.15A)
• Assure that sensor core mating surfaces are clean and

that the core clamp is completely closed.

0.1A

DANGER: 5A CTs can present hazardous voltages.

Install CTs in accordance with manufacturer's instruc-

tions. Terminate the CT secondary before applying

current.

H68xx‑5A

> 60A (Sensor max.)

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.

<0.15 A (Sensor min.)

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 through the center window. 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 controller
reading by 4.