Protective earth resistance meter RMO60E
RMO60E is ideal for testing the protective bonding (grounding) of equipment following the standard 61010-1 IEC 2001.This standard specifies for plug connected equipment and for permanently connected equipment the following requirements:
The protective earth resistance should be below 0,1Ω or voltage between the protective conductor terminal and each accessible conductive part for which protective bonding is required not to exceed 10V.
Conformity is checked by applying a test current for 1 minute and then calculating impedance, or measuring the voltage between the protective conductor terminal and each accessible conductive part for which protective bonding is required.
The test current should be greater of 25A or twice the rated current for plug connected equipment, or twice the value of the overcurrent protection for the permanently connected equipment.
For both of these applications RMO60E can provide the right tool for verification of the conformity. Applying current up to the value of 60A and the ability of RMO60E to provide in the Contin menu (continuous operation) test current for the pre-set test duration (equal or exceeding 1 min) – gives an user possibility to easily
check the protective bonding/grounding of the equipment. The full load voltage of 12V assures that the measurement is executed properly and that the result obtained (pass fail classification) is accurate.
RMO60E generates true DC current with automatically regulated test ramps. During the test RMO60E ramps with increasing current before measuring and decreasing current after the measurement. This eliminates magnetic transients. After the test current has been set, the automatic test procedure is started by pressing the Ω-button.
The RMO60E instrument can store up to 500 measurements. All measurements are time and date stamped. Using DV-Win software a test can be performed from a PC, and the results can be obtained directly at a PC Communication between RMO60E and PC is through USB or RS232 cable. Using DV-Win the result can be arranged as an Excel spread sheet which can be later shown as a diagram and printed for a report.
The set is equipped with thermal and overcurrent protection. The RMO60E has very high ability to cancel electrostatic and electromagnetic interference in HV electric fields. It is achieved by very efficient filtration. The filtration is made utilizing proprietary hardware and software.