Motwane Manufacturing Company Pvt. Ltd. Manufactures General Clamp Meters with Overload Protection on All Ranges. Motwane Manufacturing Company Pvt. Ltd. Is an ISO 9001:2000 certified company. General Clamp Meters with Overload Protection on All Ranges available in model number DCM 30A is used to perform energy audits, outage management, billing and also in agricultural areas.