• Lower Prices
• Low Capacitance
• High Discharge Current
• Continuous and repeated protection in intense environment
Application
•AC/DC distribution
•Power supplies
•Industrial automation
•Telecommunications
•Motor controls systems
•PLC applications
•Power transfer equipment
•HVAC applications
• AC drives
•UPS systems
•Security systems
•IT/Data centers
•Medical equipment
Transient voltage surgesin lv power lines
Transient overvoltages are voltage surges that can reach tens
ofkilovolts with a duration of the order of microseconds.Despite
theirshort duration, the high energy content can cause serious
problemsto equipment connected to the line, from premature aging to
destruction, causing disruptions to service and financial
loss.Thistype of surge can have various different causes, including
atmospheric lightning directly striking the external
protection(lightning rods) on a building or transmission line or
the associatedinduction of electromagnetic fields on metallic
conductors.
Outdoor and longer lines are the most exposed to these fields,which
often receive high levels of induction.
It is also common for non-weather phenomena, such as
transformer centre switching or the disconnection of motors orother
inductive loads to cause voltage spikes in adjacent lines.
Surges in telecom andsignalling networks
Surges tend to induce currents in allmetal conductors; not only are
thepower lines affected, but so are allcables to a greater or
lesser extent,depending on the distance to the focusof the surge.
Although a lower current is induced,the effect produced is equally
or moredestructive, due to the greatersensitivity of electronic
equipmentconnected to communications lines(telephone, Ethernet, R,
etc.).
Importance of theground connection
Overvoltage protectors (SPD) divert excess energy toground, so
limiting the peak voltage to an acceptablevalue for connected
electrical equipment.
A ground connection in adequate condition is, therefore,a key
aspect for effective protection against overvoltages.Monitoring
ground connection condition guaranteesproper operation of surge
protection devices.
Comprehensive protection
An effective overvoltage protection must combine thefollowing
protection systems:
External protection (ESE lightning rods and faradization).System
for protection against direct lightningstrike.These capture the
lightning within the protectedarea and lead it, in a controlled
manner, safely to ground. Internal protection (power frequency
overvoltage andsurge protection devices). Equipment designed to
protectagainst the effects of overvoltages in equipment connected
to the power supply systems and/orcommunications networks.Grounding
systems (grounding and insulation monitoring).Systems that allow
atmospheric dischargecurrents to be dispersed into the ground. The
need formonitoring the grounding system.CUAJE offers a widerange of
products for each of these systems. It alsodevelops custom
products, provides advice and consultingservices and the best
possible aftersales service.