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SINGLE PHASE METER TEST BENCH

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Single phase meter test bench suitable for calibration & testing of AC Ammeters, AC Volt Meters, AC Single phase Energy Meters, Power Factor Meters & Watt Meters. Other Technical Specifications are as under :

INPUT

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400/440V., A.C. 3 Phase 50 Hz.

OUTPUT TEST VOLTAGE

:

0-250 Volts, single phase A.C. 50Hz.

TEST VOLTAGE REGULATION

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0-120% of the selected range.

CREEP TEST VOLTAGE

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75%, 80%, 100%, 110% & 120% of selected voltage.

CURRENT RANGE

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1-2.5-5-10-25 & 50A

CURRENT REGULATION

:

0 to 120% of range selected.

STARTING CURRENT

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0.5%, 0.75%, 1% &1.5% of the range selected.

PHASE SHIFT

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Built-in Phase Shifting Transformer static type, phase angle variation 90 degree Lag Unity 90 degree lead & in between values continuously variable.

OUTPUT CAPACITY

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1200 VA. This Bench will be capable to test 50 Nos. Single Phase Energy Meters at a time.

Class of accuracy for C.T. 0.2 & Potential Transformer 0.5


INSTRUMENTS:

Digital Ammeter

:

1 No.

Digital Voltameter

:

1 No.

Single phase digital Power Factor Meters

:

1 No.

Digital Frequency Meter

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1 No.

The complete system will be assembled in powder coated M.S. horizontal cabinet duly wired and tested. The ferrules matching circuit diagram will be supplied with the Bench.

More than 325 Nos. Meter Test Benches are alreadyin use with the Maharashtra State Electricity Board to their O & M, and Testing Divisions throughout Maharashtra.
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M.S.V.T. (MULTI SECONDARY VOLTAGE TRANSFORMER)

Ratio 240V/240V having 88/44/22/11 secondary winding rated for 5VA/10VA/20VA or 40VA or any other VA ratings as per customers requirements. There is no measurable variation in error from one winding to any other winding. Also there is no measurable variation error when the burden is transferred to each of the other secondary windings. There is only one input and a number of independent output with same output voltage and burden. It is an ideal transformer for Energy Meter Test Benches where a number of meters are calibrated and tested at a time. The class of accuracy can be + 1% or + 0.5% or + 0.3% Insulation between primary and secondary winding will be 5 kV. Between each secondary winding proper insulation will be given to withstand 3 kV. If there is no proper insulation, the primary and secondary windings will get heated and the transformer will be burntout. While heating up, the output will be disturbed and will be out of accuracy.

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