Caution, Installation guide, Operation – Veris Industries H800-HV Install User Manual

Page 2: Troubleshooting

Z201590-0F

PAGE 2

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INSTALLATION GUIDE

H800HV

OPERATION

The H800HV 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 will
cause the resistance of the FET status output to change state, similar to the action of
a mechanical switch. In this model, the setpoint is fixed at 750mA AC max. The status
output is suitable for connection to building controllers or other appropriate data
acquisition equipment with inputs up to 250 volts. The H800HV 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.

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.

DANGER: 5A CTs can present hazardous voltages.

Install CTs in accordance with manufacturer's instructions.

Terminate the CT secondary before applying current.

H68xx-5A CT

> 200A (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.

Program 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.

< 0.75 A (Sensor Min.)

0.5A

TROUBLESHOOTING

Problem

Solution

No Reading at Controller

• Check for control voltage at sensor (<250V)
• Check for amperage in monitored conductor (> 0.75A

@ 60Hz)

150A

300A:

2.5A

250

4.2