Honeywell CADVR-04D User Manual page 229

up or stops, the surge can reach 3000V to 50000V, which can adversely
affect the electronic devices that use the same distribution box.
To protect the device, you need to evaluate its environment, the lighting
affection degree objectively. Because surge has close relationship with
the voltage amplitude, frequency, network structure, device voltage-
resistance, protection level, ground and etc. The thunder proof work
shall be a systematic project, emphasizing the all-round protection
(including building, transmission cable, device, ground and etc.). There
shall be comprehensive management and the measures shall be
scientific, reliable, practical and economic. Considering the high voltage
during the inductive thundering, the International Electrotechnical
Committee (IEC) standard on the energy absorbing step by step theory
and magnitude classification in the protection zone, you need to prepare
multiple precaution levels.
You can use the lightning rod, lightning strap or the lightning net to
reduce the damage to the building, personal injury or the property,
The lightning protection device can be divided into three types:
Power lightning arrester: There are 220V single-phrase lightning
arrester and 380V three-phrase lightening arrester (mainly in parallel
connection, sometimes use series connection ) You can parallel
connect the power lightning arrester in the electric cable to reduce the
short-time voltage change and release the surge current. From the BUS
to the device, there are usually three levels so that system can reduce
the voltage and release the current step by step to remove the
thunderstorm energy and guarantee the device safety. You can select
the replaceable module type, the terminal connection type and portable
socket according to your requirement.
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