Mahesh Electrical Instruments

Other Details

The D.C. Shunt (or ME shunts) available with us are ideal for current ratings from 5 to 10000 Amps and mill volt drops of 75 millivolts. The product conforms to IS Standards 1248 and is provided with leads of 0.025 ohms.

Some of its construction features are cited below:

• It consists of Mangenin rods, soldered or silver brazed, to brass end blocks.
• It is artificially aged after manufacture; followed by tests on full load.
• Lead resistance is considered while calibrating the instrument
• Salient features of the ME Shunts are as follows:
• Class 1 accuracy
• Temperature Co-Efficient
• 0.002% per degree centigrade, above ambient temperature in still air, with free ventilation
• Temperature not exceeding 120°C at the center and 90°C at the ends
• The ME Shunts withstand temperatures up to 120oC; without any permanent alterations in physical or electrical properties
• Overloads and faults due to high temperatures (>120oC) can be safely handled
• All 75 millivolts drop shunts of class 1, withstand the following overload requirements:
• 2 X rated current for 3 minutes
• 4 X rated current for 30 seconds
• 10 X rated current for 5 seconds