Moving Iron Instruments

Moving Iron Instruments

Moving Iron Instruments are generally used for measuring AC Voltages and Currents. These are repulsion type moving iron system having high torque to weight ratio. Instruments are highly damped with best jewel bearings, incorporated with hardened and precisely polished pivots and chemically treated hair springs for corrosion protection. An efficient system of fluid damping is employed.

The movement is efficiently shielded against the effect of external magnetic fields . Moving Iron Meter of 90 degree Deflection . The design and construction of instruments is most modern. Sturdiness, simplicity, sensitivity and rigid quality control ensure these movements for high grade performance under adverse conditions of shock and vibration. All instruments are housed in ABS moulded dust proof cases with zero adjuster accessible from the front.

Additional:

Movement Type : Moving Iron type with Jewel Bearing Suspension.
Range : Current (A) : 0 - 1A to 0 - 100A (Direct), Through CT/1A or /5A for Higher Currents and suppressed scale meters with ratio of maximum 1:6. Voltage (V) : 0 - 10V to 0 - 750V (Direct), Through PT for Higher Voltages.
size : 48x48mm , 72x72mm , 96x96mm , 144x144mm.
Standards: IS-1248.
Accuracy : ±1.5% of Full Scale for all except SR48.
±2.5% of Full Scale for SR48.

Square Size Meters : 

Size Front (a x b) (sq.mm) Panel Cutout Scale Length C D Accuracy
SR-144 144 X144 136 X 136 155 44 52 1.00%
SR-96 96 X 96 92 X 92 92 44 52 1.50%
SR-72 72 X72 68 X 68 62 44 52 1.50%
SR-48 52 X52 46 X 46 40 37 42 2.50%