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Hello everyone; we have a 37kw 380v 1480 rpm/min ATB three phase motor drive an air cooler fan through a VFD converter the motor is V6 Mounting type and have a radial coupling with pulley and belt to the fan, we have bought a new motor HEMLKE DOR225S-04-1G to replace the old ATB one, with...

mr waross thank your detailed explication and Example

thank you mr Che Kuan Yau for your clarification and correction it s in series not on parallel

hello again mr Che Kuan Yau just a simple question if i use the earth ground clamp between tow rods as showing on the picture the resistances are in series : resistance of the 1st rod and the 2sd rod plus the resistance of the wire and the earth which are typically very low and the tester...

hello Kiribanda instrument earth is earthing in telecominication and sensitive local the safety earth

sorry for the late reply che12345; this test is for mesuring earth resistance of the rod for a telecomonication building (data center) i used earth ground clamp CA6416 the mesure has been made according to stakeless test method using one existant earth rod by disconecting it from the earth loop...

dear all i made a test of instrument earth impedance and i found it 4.6 ohm. i need to know if this is acceptable value or not and the electtrical standards related to that thanks in advance