Safety for human life – from dangers of electrical shock which can cause injury or death
Safety for electrical devices and buildings – by providing a safe path for lightening and short-circuiting, thus preventing damage
Voltage stabilization – by providing a common point for electricity to pass through that is coming from different sources
Over-Voltage Protection – by providing an alternative path in the electrical system in cases of lightening and unintentional contact with high voltage lines
Products & Services
METHODS OF EARTHING
1- CONVENTIONAL EARTHING 2- CHEMICAL EARTHING
Requires digging of large pits; uses copper plates positioned amidst layers of charcoal and salt
Has a very erratic behavior and ohmic value fluctuates drastically with weather conditions
Requires regular maintenance
Coal in the earthing pit burns and turns into ash under high level of fault currents
Salt is dissolved in the water and loses its hygroscopic properties
Imported material, Bentonite is one of the most popular chemical earthing materials available
It is a sodium-based clay that retains moisture and reduces earth resistance
However, moisture absorption feature of Bentonite is also its weakness. It is liable to drying out and shrinking or even being washed away entirely.
Bentonite requires maintenance after every few years, such as adding additional water or salts to continue to achieve low earth resistivity
Products & Services
Kolomite (Modern Earthing Material)
ERDC-MPPL is proud to be introduced Kolomite (modern/permanent earthing solution) for the 1st time in Pakistan. Now there is no need to import the material from UK etc or using of conventional method which required maintenance. Kolomite is a ground enhancement material having resistivity of less than 0.25 Ω-m and has been developed specially to make earthing system cheap and effective according to IEEE std 80-2000 section 14.5 para requirements given on page 68 of standard section 14.5 deals with soil treatment to lower resistivity and gives various options available to achieve it.
Unique features and specificationss
Physical Appearance in powder form
200- 250 mesh
Lower Resistivity, High conductivity
Permanent and Maintenance free
Maintenance Earth Resistance with time
Set firmly, does not dissolve or React.
Does not pollute the earth and water table
Suitable for installation in slurry form
Doe not depend on the presence of water
Perform in all soil and weather conditions
No reaction with electrode (sulphur free)
Kolomite is recommended for both, household as well as industry electrical earthing requirements.
For household: of two or more Kolomite blocks connected in parallel with copper wires can be used to fulfill earthing requirements.
For industry: Kolomite powder mixed with cement is filled in a 20-ft deep borehole to form conductive concrete and connected with a Copper strip to fulfill earthing requirements.