Rishlnsu-5000a high-voltage insulation testers from rishabh instruments are rugged 5 kv instruments made from state-of-the-art german technology. These insulation testers conform to is:2992 [en61 557]. They are available in a wide selectable voltage range, like 100, 250, 500, 1000, 1500, 2000, 2500, and 5000 v. The insulation testers have a broad measuring range of 10 ohms to 1 tohms. Test current is equal to 1 ma at a test voltage of 100 v, 250 v, 500 v and 1000 v. Battery-operated or crank-operated types are site-configurable. Other features include: guard terminals for elimination of surface current; permanently connected test leads with heavy-duty insulation; easy-to-read logarithmic scales; green led indicator to show whether or not battery charge is sufficient; voltage measurement up to 2000 v ac/dc; measurement of insulation resistance, checking absence of voltages and discharging charged capacitances; and power supply of 6 x 1.5 v battery.