CPT-Cirprotec-M-GROUNDING-SYSTEM-MONITOR-GCHECK
12Pages

Specialists in lightning and surge Cirprotec is the specialist company when it comes to lightning and surge protection which supplies the in- dustrial, commercial and residential sectors with the widest range of solutions in the market. Surge protectors: transient surges and perma- nent (TOY) overvoltage protectors for LV sup- plies, telephone lines, radiofrequency, data net- ESE-type lightning rods (Early Streamer Emis- sion), control and monitoring devices for installa- tion ground systems, etc. Development of custom solutions, projects and technical training. Total solution: protection,...

installation monitor Cirprotec has developed a revolutionary product that checks the grounding installation status in real time and triggers a warning system if the installation G-Check is the first product on the market designed for continuous monitoring of grounding installations. G-Check is a standalone, compact DIN-rail mount- able device for installation in panels. By calculating loop resistance it can detect fluc- tuations in the installation's grounding caused by: Accidental ground- Deterioration of the ing disconnection installation ground-

Importance of grounding systems The resistance of the grounding is one of the most important parameters of the entire installation. Prevents contact voltages in solid metal from exceed- ing those permissible for people by allowing voltage leakage, and ensures correct and safe discharge of currents caused by voltage surges. An electrical installation should be in optimal condi- tions to ensure safety. In case of grounding failure, the ground system installation helps protect people and equipment from harm and damage. International standard I EC 60479 (Effects of current on human beings and...

Through a single button, a display and an intuitive navigation system, G-Check offers the following features: % Loop resistance From milliohms to over 500 ohms. played loop This adjustment is done by subtracting a user-defined variable from the ac- tual value measured by the G-Check. This way users can match the value of the ground connection of the instal- lation with the valued measured and displayed by G-Check. (If you select this option, the ohm symbol on the display will start blinking). The reading displayed by the G-Check does not necessarily have to be greater than the grounding...

Method for calculating loop resistance G-Check uses a standard loop resistance. This method involves applying a voltage pulse to the grounding wire and measuring the re- turn current on the neutral. In any of the vari- ous grounding arrangements, G-Check checks the impedance of the actual leakage path of an indirect contact. This is no doubt the most im- portant parameter to monitor Current loop in the event of a person's indirect contact. The earth leakage current loops, as explained in the following pages, depend on each instal- lation's grounding arrangement. In TN systems the loop is...

G-Check Advantages The grounding system is of vital importance in installations. By continuously monitoring the status of the grounding connec- tion with G-Check we gain in security and savings: grounding installation • Ensuring protection of persons against indirect contact. • Preventing the destruction of prop- • Ensuring proper protection against voltage surges. Reducing preventive main- • Ensuring adequate protection with- out the need for daily maintenance G-Check gives you peace of G-Check detects, in TT, TNS and TNC-S systems, any situation which may affect the safety of people,...

G-Check value depending on the ground- G-Check measurements of the current leakage loop have different meanings depending on the various types of grounding arrangements. In the various grounding arrangements, PE and neu- tral cables have different trajectories, in other words, different earth-fault current loops. It is therefore nor- mal for G-Check readings to have different meanings G-Check does not work for IT or TNC networks. G-Check inTT systems In a TT system, the loop measured by G-Check is that which appears in this figure. In this system it is checking the status of the loop, i.e....

• G-Check inTNS systems In a TNS system, the loop measured by G-Check is that which appears in this figure. Unlike TT systems, the installation's PE cable does not have an independent grounding connection. For this reason, G-Check checks the resistance of the conductor loop, not the status of the grounding connection. G-Check measurement loop or leakage current in TNS systems. It is usual in TNS systems to connect the PE ground- ing cable at the entry to the installation. It becomes in effect a sort of TNS/TT system. In this case the fault current leakage loop, the loop measured by G-Check,...

The grounding system of any electrical installation is essential. Therefore, G-Check is useful for any type of installation, whether remote or in the city. The following are some examples of possible applications. 0 Medium Voltage / Low Voltage Transformer

Long pulses Short pulses