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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 :
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INPUT
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400/440V.,
A.C. 3 Phase 50 Hz.
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OUTPUT
TEST VOLTAGE
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0-250
Volts, single phase A.C. 50Hz.
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TEST
VOLTAGE REGULATION
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0-120%
of the selected range.
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CREEP
TEST VOLTAGE
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75%,
80%, 100%, 110% & 120% of selected voltage.
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CURRENT
RANGE
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1-2.5-5-10-25
& 50A
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CURRENT
REGULATION
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0
to 120% of range selected.
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STARTING
CURRENT
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0.5%,
0.75%, 1% &1.5% of the range selected.
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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.
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OUTPUT
CAPACITY
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1200
VA. This Bench will be capable to test 50 Nos. Single Phase Energy Meters at a
time.
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Class
of accuracy for C.T. 0.2 & Potential Transformer 0.5
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INSTRUMENTS:
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Digital
Ammeter
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1
No.
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Digital
Voltameter
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1
No.
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Single
phase digital Power Factor Meters
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1
No.
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Digital
Frequency Meter
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1
No.
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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.
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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)
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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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