EARTHING CONTACT RESISTANCE TESTER

EARTHING CONTACT RESISTANCE TESTER is a basic safety test prescribed in many standards to test samples for the proper connection of Earthing with appliance or Unit, throughout the sample. The fall-of-potential test method is used to measure the ability of an earth ground system or an individual electrode to dissipate energy from a site. The earth electrode of interest must be disconnected. The tester is then connected to the earth electrode.It checks the contact resistance between accessible metal parts of the Appliance and Earth by passing a high current and measuring the resultant voltage drop. (The principle of measurement is Ohm’s Law) and the metering and transformers are properly designed to obtain accurate results. The appliance is placed on an insulating surface. The EARTH terminal of the  electrode is firmly fixed to the main Earth terminal of the appliance The heavy duty cables and crocodile clip is firmly connected to the appliance that nullify the cable resistance or minimize the resistance when connected to various accessible metal parts of appliance or unit and a high current is passed between ‘OUTPUT’ and ‘EARTH’.

Distinctive Attributes

> Bench top unit requiring a 230 Volts /110 Volts AC, single phase.
> Digital meters are provided for indicating Voltage and Current.
> Heavy duty output supply with current limiting.
> Over current relay is provided case of output over current.
> Test Voltage 12 V AC or 5 Volts AC source as per requirement.
> Test Current Range 0~30 A AC, customized current source can be designed as per requirement
> Voltmeter Digital
> Ammeter Digital