These instruments have been specially designed for routine testing and sorting of great number of Paper and Polypropylene Capacitors used for correcting Loss Factor of industrial loads.

Tan d is read directly in terms of percentage. The instrument has an essential advantage over the customary bridges as measurements are carried out under actual working conditions (50 Hz, 150 Volts or high voltage upto 11KV) and that no tuning is necessary prior to every single reading. This results in higher sorting speed, hence in more economical productive tests. No exacting demands are made on the alertness of the checker. The measured value can be read directly on a meter .

The Loss Factor Meter makes use of the fact that the current through the capacitor will not lead exactly 90 from the voltage across it. The extent of deviation in the phase is measured with an ultra sensitive phase detector comprising of solid-state components only. The capacitor is coupled to the circuit by a low loss network.

A separate meter for calibration is provided to compensate been made to use the best possible components to ensure electrical stability. The measurement is done at AC voltage between 150 V and 11 KV, 50 Hz. The instrument measures the Loss Factor as low as 0.0002 and the indication is directly given on the Digital Panel Meter. The capacitance range is 0.1 mfd to 1000 mfd.

The capacitors can be checked at the rate of 200 per hour. Isolating transformer of adequate rating is required depending on the size of the biggest capacitor to be tested. Speed of testing can be increased substantially if the equipment is used in conjunction with "Control Unit" Model, LPO - 5D/LPO - 5MD can be used in conjunction with Capacitance Meter LSO - 9D for simultaneous indication of Value and Loss Angle.The equipment is available in two models as per the specifications given overleaf.

TECHNICAL SPECIFICATIONS

MODEL LPO - 5D LPO - 5MD Capacitance Range 1 to 1000 mfd 1 to 30 mfd Loss Factor Range 0.0002 to 0.1999 0.0002 to 0.1999 Resolution 0.0001 tan d 0.0001 tan d A. C. Voltage applicable by external power source 150 to 600 V 150 to 600 V Indication 3½ digit DPM 3½ digit DPM Speed of testing 200 capacitors per hour with a suitable jig 200 capacitors per hour with a suitable jig Warm up time 5 minutes 5 minutes Weight 11 Kg. 11 Kg. Construction for bench use Sturdy metal cabinet for bench use Sturdy metal cabinet Dimensions 435 x 345 x 192 mm 420 x 270 x 225 mm